* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg-start: #a9bceb;
    --color-bg-end: #8298d8;
    --color-glow-rgb: 15, 27, 64;
    --color-primary: #f5c046;
    --color-primary-dark: #d4a32c;
    --color-primary-light: #fff3c4;
    --color-muted: #294a86;
    --color-secondary: #4a5d9f;
    --color-secondary-hover: #3a4c87;
    --color-ink: #0f1b40;
    --color-text: #1c2438;
    --color-text-muted: #5d6781;
    --color-surface: #ffffff;
    --color-card-bg: #ffffff;
    --color-card-border: #e0e6f5;
    --color-panel-bg: #f6f8ff;
    --color-panel-border: #e2e7fa;
    --color-scroll-track: #e5ecff;
    --color-scroll-thumb: #b9c6ec;
    --color-scroll-thumb-hover: #8a96c0;
    --color-header-start: #f4f8ff;
    --color-header-mid: #d8e7ff;
    --color-header-end: #b4ceff;
    --color-header-text: #0f1b40;
    --color-group-start: #e4efff;
    --color-group-end: #c0d6ff;
    --color-card-shadow: rgba(15, 23, 42, 0.08);
    --color-highlight-bg: rgba(242, 188, 3, 0.15);
    --color-input-bg: #ffffff;
    --color-table-head-bg: #f5f7ff;
    --color-table-head-text: #1d243c;
    --color-card-solid: #ffffff;
}

body[data-theme="dark"] {
    --color-bg-start: #060a16;
    --color-bg-end: #141e32;
    --color-glow-rgb: 3, 8, 20;
    --color-primary: #e9b748;
    --color-primary-dark: #c2912f;
    --color-primary-light: #3d2a07;
    --color-muted: #5d78c4;
    --color-secondary: #5467a6;
    --color-secondary-hover: #45548a;
    --color-ink: #f7f9ff;
    --color-text: #f4f7ff;
    --color-text-muted: #b8c4e3;
    --color-surface: #0f172a;
    --color-card-bg: #151f35;
    --color-card-border: #253457;
    --color-panel-bg: #1a2744;
    --color-panel-border: #253457;
    --color-scroll-track: #1a2235;
    --color-scroll-thumb: #3b4e7c;
    --color-scroll-thumb-hover: #6073a7;
    --color-header-start: #111c33;
    --color-header-mid: #15223e;
    --color-header-end: #0b1426;
    --color-header-text: #f7f9ff;
    --color-group-start: #1a2744;
    --color-group-end: #0f1935;
    --color-card-shadow: rgba(3, 8, 20, 0.55);
    --color-highlight-bg: rgba(245, 194, 66, 0.2);
    --color-input-bg: #101b33;
    --color-table-head-bg: #1f2d4a;
    --color-table-head-text: #f7f9ff;
    --color-card-solid: #152036;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background:
        radial-gradient(circle at 82% 8%, rgba(var(--color-glow-rgb), 0.55) 0%, rgba(var(--color-glow-rgb), 0.35) 22%, rgba(var(--color-glow-rgb), 0) 55%),
        linear-gradient(180deg, var(--color-bg-start) 0%, var(--color-bg-end) 100%);
    background-attachment: fixed;
    min-height: 100vh;
    padding: 20px;
    color: var(--color-text);
}

body.modal-open {
    position: fixed;
    overflow: hidden;
    width: 100%;
    left: 0;
    right: 0;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: var(--color-surface);
    border-radius: 16px;
    box-shadow: 0 20px 60px var(--color-card-shadow);
    overflow: visible;
}

header {
    background: linear-gradient(135deg, var(--color-header-start) 0%, var(--color-header-mid) 55%, var(--color-header-end) 100%);
    color: var(--color-text);
    padding: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 4px solid var(--color-primary);
    box-shadow: 0 15px 35px var(--color-card-shadow);
}

@media (max-width: 768px) {
    body:not([data-theme='dark']) header {
        background: linear-gradient(160deg, #7688d2 0%, #5161b4 100%);
    }

    body[data-theme='dark'] header {
        background: linear-gradient(150deg, #070f25 0%, #02050e 100%);
    }
}

.brand {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo-stack {
    position: relative;
    display: flex;
}

.app-logo {
    height: 72px;
    width: auto;
    object-fit: contain;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.25));
}

.app-logo-dark {
    display: none;
}

body[data-theme='dark'] .app-logo-dark {
    display: block;
}

body[data-theme='dark'] .app-logo-light {
    display: none;
}

.brand-text h1 {
    margin: 0;
    font-size: 26px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--color-text);
}

header h1 {
    font-size: 32px;
    font-weight: 700;
}

.header-actions {
    display: flex;
    gap: 14px;
    align-items: center;
}

.user-menu {
    position: relative;
    margin-left: 10px;
}

body:not([data-theme='dark']) .profile-trigger {
    background: rgba(255, 255, 255, 0.75);
    border-color: rgba(15, 27, 64, 0.15);
}

.profile-trigger {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid rgba(var(--color-glow-rgb), 0.2);
    background: rgba(255, 255, 255, 0.25);
    color: var(--color-text);
    padding: 8px 14px;
    border-radius: 999px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.2s ease, border-color 0.2s ease;
}

body[data-theme='dark'] .profile-trigger {
    background: rgba(0, 0, 0, 0.25);
    border-color: rgba(255, 255, 255, 0.2);
}

.profile-trigger:hover {
    background: rgba(255, 255, 255, 0.4);
}

.profile-trigger:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.profile-arrow {
    font-size: 12px;
}

.profile-dropdown {
    position: absolute;
    top: calc(100% + 12px);
    bottom: auto;
    right: 0;
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: 12px;
    box-shadow: 0 15px 35px var(--color-card-shadow);
    min-width: 200px;
    padding: 8px;
    display: none;
    z-index: 1000;
    backdrop-filter: blur(16px);
}

@media (max-width: 768px) {
    .profile-dropdown {
        top: calc(100% + 8px);
        left: auto;
        right: 0;
    }
}

.profile-dropdown.open {
    display: block;
}

.profile-dropdown-item {
    width: 100%;
    text-align: left;
    padding: 10px 12px;
    border: none;
    background: transparent;
    border-radius: 8px;
    color: var(--color-text);
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
}

.profile-dropdown-item:hover {
    background: var(--color-panel-bg);
}

.logout-item {
    color: #f87171;
}

.logout-item:hover {
    background: rgba(248, 113, 113, 0.15);
}

/* Users Table */
.table-container {
    overflow-x: auto;
}

.users-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-card-bg);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px var(--color-card-shadow);
}

.users-table thead {
    background: var(--color-table-head-bg);
    color: var(--color-table-head-text);
}

.users-table th,
.users-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--color-card-border);
}

.users-table th {
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.users-table td {
    font-size: 14px;
    color: var(--color-text);
}

.users-table tbody tr:hover {
    background-color: var(--color-panel-bg);
}

.users-table tbody tr:last-child td {
    border-bottom: none;
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-primary {
    background-color: var(--color-primary);
    color: var(--color-ink);
}

.badge-danger {
    background-color: #e74c3c;
    color: white;
}

.badge-success {
    background-color: #10b981;
    color: white;
}

.badge-secondary {
    background-color: #6c757d;
    color: white;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
    margin: 0 2px;
}

/* User Groups Selector */
.user-groups-selector {
    max-height: 200px;
    overflow-y: auto;
    border: 1px solid var(--color-card-border);
    border-radius: 8px;
    padding: 12px;
    background-color: var(--color-panel-bg);
}

.user-groups-selector label {
    display: flex;
    align-items: center;
    padding: 4px 0;
    margin-bottom: 4px;
}

/* User Multi Select */
.user-multi-select {
    max-height: 200px;
    overflow-y: auto;
    border: 1px solid var(--color-card-border);
    border-radius: 8px;
    padding: 12px;
    background-color: var(--color-panel-bg);
}

.user-multi-select label {
    display: flex;
    align-items: center;
    padding: 4px 0;
    margin-bottom: 4px;
    color: var(--color-text);
}

.user-multi-select label span,
#manage-homework-users-selector label span {
    color: var(--color-text);
}

#manage-homework-users-selector label {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 0;
    color: var(--color-text);
}

.tabs {
    display: flex;
    background: var(--color-panel-bg);
    border-bottom: 2px solid var(--color-card-border);
}

.tab-btn {
    flex: 1;
    padding: 15px;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-muted);
    transition: all 0.3s;
}

.tab-btn:hover {
    background: var(--color-panel-border);
}

.tab-btn.active {
    background: var(--color-card-bg);
    color: var(--color-primary);
    border-bottom: 3px solid var(--color-primary);
}

.tab-content {
    display: none;
    padding: 30px;
    background: var(--color-card-bg);
    border-radius: 0 0 16px 16px;
}

.tab-content.active {
    display: block;
}

.section {
    margin-bottom: 30px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.section h2 {
    font-size: 24px;
    color: var(--color-text);
    margin-bottom: 20px;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-ink);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(242, 188, 3, 0.35);
}

.btn-success {
    background: #86efac;
    color: var(--color-ink);
}

.btn-success:hover {
    background: #4ade80;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 222, 128, 0.4);
}

.btn-secondary {
    background: var(--color-secondary);
    color: #fff;
}

.btn-secondary:hover {
    background: var(--color-secondary-hover);
}

.btn-danger {
    background: #fecdd3;
    color: var(--color-ink);
}

.btn-danger:hover {
    background: #fb7185;
}

body[data-theme='dark'] .btn-danger {
    background: #b91c1c;
    color: #fee2e2;
}

body[data-theme='dark'] .btn-danger:hover {
    background: #dc2626;
}

.btn-small {
    padding: 6px 12px;
    font-size: 12px;
}

.theme-toggle-btn {
    width: auto;
    height: 44px;
    padding: 0 14px;
    border-radius: 999px;
    border: 1px solid rgba(var(--color-glow-rgb), 0.25);
    background: transparent;
    color: var(--color-text);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    gap: 6px;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.theme-toggle-btn:hover {
    background: rgba(var(--color-glow-rgb), 0.08);
    transform: translateY(-2px);
}

body[data-theme='dark'] .theme-toggle-btn {
    border-color: rgba(255, 255, 255, 0.25);
    color: var(--color-text);
}

/* Ödevler Listesi */
.homeworks-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.homework-card {
    background: var(--color-card-bg);
    border: 2px solid var(--color-card-border);
    border-radius: 12px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s;
    color: var(--color-text);
}

body:not([data-theme='dark']) .homework-card {
    background: #f4f6fb;
    border-color: #dfe5f2;
}

body[data-theme='dark'] .homework-card {
    background: #101b30;
    color: var(--color-text);
    border-color: #2a3c5d;
}

.homework-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px var(--color-card-shadow);
    border-color: var(--color-primary);
}

.homework-card h3 {
    color: var(--color-text);
    margin-bottom: 10px;
    font-size: 18px;
}

.homework-meta {
    display: flex;
    gap: 15px;
    color: var(--color-text-muted);
    font-size: 14px;
    margin-top: 10px;
}

.homework-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Öğrenciler Listesi */
.students-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 15px;
}

.student-card {
    background: var(--color-card-bg);
    border: 2px solid var(--color-card-border);
    border-radius: 12px;
    padding: 15px;
    transition: all 0.3s;
    color: var(--color-text);
}

body:not([data-theme='dark']) .student-card {
    background: #ffffff;
    border-color: #e2e8f0;
}

body[data-theme='dark'] .student-card {
    background: #101b30;
    color: #f8fafc;
    border-color: #2a3c5d;
}

.student-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 4px 12px var(--color-card-shadow);
}

.student-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.student-info {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 5px;
}

.student-actions {
    margin-top: 10px;
    display: flex;
    gap: 8px;
}

/* Öğrenci İlerleme Tablosu */
.progress-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-card-bg);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px var(--color-card-shadow);
}

.progress-table th {
    background: var(--color-table-head-bg);
    color: var(--color-table-head-text);
    padding: 12px;
    text-align: left;
    font-weight: 600;
}

.progress-table td {
    padding: 12px;
    border-bottom: 1px solid var(--color-card-border);
    color: var(--color-text);
}

.progress-table tr:hover {
    background: var(--color-panel-bg);
}

.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.status-bekliyor {
    background: var(--color-highlight-bg);
    color: #92400e;
}

.status-tamamlandı {
    background: #d1fae5;
    color: #065f46;
}

.status-geç_teslim {
    background: #ffe4e6;
    color: #be123c;
}

body[data-theme='dark'] .status-bekliyor {
    background: rgba(250, 204, 21, 0.18);
    color: #fcd34d;
}

body[data-theme='dark'] .status-tamamlandı {
    background: rgba(74, 222, 128, 0.18);
    color: #86efac;
}

body[data-theme='dark'] .status-geç_teslim {
    background: rgba(248, 113, 113, 0.2);
    color: #fecdd3;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    touch-action: pan-y;
}

.modal-content {
    background-color: var(--color-card-bg);
    margin: 2% auto;
    padding: 0;
    border-radius: 16px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px var(--color-card-shadow);
    animation: modalSlideIn 0.3s;
    color: var(--color-text);
}

.modal-large {
    max-width: 900px;
}

/* Modal scroll styling */
.modal-content::-webkit-scrollbar {
    width: 8px;
}

.modal-content::-webkit-scrollbar-track {
    background: var(--color-scroll-track);
    border-radius: 10px;
}

.modal-content::-webkit-scrollbar-thumb {
    background: var(--color-scroll-thumb);
    border-radius: 10px;
}

.modal-content::-webkit-scrollbar-thumb:hover {
    background: var(--color-scroll-thumb-hover);
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    padding: 20px 30px;
    border-bottom: 2px solid var(--color-card-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--color-card-bg);
}

.modal-header h2 {
    margin: 0;
    color: var(--color-text);
    font-size: 22px;
}

.close {
    color: var(--color-text-muted);
    font-size: 32px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: var(--color-text);
}

form {
    padding: 20px 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--color-text);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid var(--color-card-border);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
    background: var(--color-input-bg);
    color: var(--color-text);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--color-text-muted);
    font-size: 12px;
}

/* Checkbox label styling */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    margin-bottom: 0;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    cursor: pointer;
    margin: 0;
    flex-shrink: 0;
}

.checkbox-label span {
    font-size: 14px;
    font-weight: 500;
    user-select: none;
    color: var(--color-text);
}

.modal-footer {
    padding: 20px 30px;
    border-top: 2px solid var(--color-card-border);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    background: var(--color-card-bg);
}

/* Puanlama Formu */
.scoring-form {
    padding: 20px;
}

.question-score {
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    gap: 15px;
    align-items: center;
    padding: 15px;
    background: var(--color-panel-bg);
    border-radius: 8px;
    margin-bottom: 10px;
}

.question-score input {
    width: 80px;
    padding: 8px;
    border: 2px solid var(--color-card-border);
    border-radius: 6px;
    text-align: center;
    font-size: 16px;
    font-weight: 600;
}

.homework-info-box {
    background: var(--color-panel-bg);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.homework-info-box p {
    margin-bottom: 8px;
    color: var(--color-text);
}

.homework-content {
    margin-top: 15px;
    padding: 15px;
    background: var(--color-card-bg);
    border-left: 4px solid var(--color-primary);
    border-radius: 6px;
}

.homework-content-text {
    margin-top: 10px;
    padding: 10px;
    background: var(--color-input-bg);
    border-radius: 4px;
    line-height: 1.6;
    color: var(--color-text);
    white-space: pre-wrap;
    word-wrap: break-word;
}

.homework-link {
    color: var(--color-primary-dark);
    text-decoration: underline;
    word-break: break-all;
}

.homework-link:hover {
    color: var(--color-primary);
}

body[data-theme="dark"] .homework-link {
    color: var(--color-primary);
}

body[data-theme="dark"] .homework-link:hover {
    color: var(--color-primary-light);
}

.notes-textarea {
    width: 100%;
    padding: 10px;
    border: 2px solid var(--color-card-border);
    border-radius: 8px;
    margin-top: 10px;
    font-family: inherit;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-text-muted);
}

.empty-state-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.empty-state-text {
    font-size: 18px;
    color: var(--color-text-muted);
}

/* Checkbox Quick Scoring */
.quick-scoring-grid {
    display: grid;
    gap: 15px;
    padding: 20px;
}

.question-checkbox-item {
    display: grid;
    grid-template-columns: 50px 1fr 80px auto;
    gap: 15px;
    align-items: center;
    padding: 15px;
    background: var(--color-panel-bg);
    border-radius: 8px;
    border: 2px solid var(--color-card-border);
    transition: all 0.3s;
}

.question-checkbox-item:hover {
    border-color: var(--color-primary);
    background: var(--color-highlight-bg);
}

.question-checkbox-item.checked {
    border-color: #10b981;
    background: #d1fae5;
}

.question-checkbox-item input[type="checkbox"] {
    width: 24px;
    height: 24px;
    cursor: pointer;
    accent-color: var(--color-primary);
}

.question-checkbox-item .question-desc {
    font-size: 15px;
    color: var(--color-text);
    font-weight: 500;
}

.question-checkbox-item .question-points {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary);
    text-align: center;
}

.question-checkbox-item .question-max {
    color: var(--color-text-muted);
    font-size: 14px;
}

/* Numeric Score Input */
.question-score-item {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 15px;
    align-items: center;
    padding: 15px;
    background: var(--color-panel-bg);
    border-radius: 8px;
    border: 2px solid var(--color-card-border);
    transition: all 0.3s;
    margin-bottom: 10px;
}

.question-score-item:hover {
    border-color: var(--color-primary);
    background: var(--color-highlight-bg);
}

.question-score-item .question-desc {
    font-size: 15px;
    color: var(--color-text);
    font-weight: 500;
}

.score-input-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.score-input {
    width: 80px;
    padding: 8px 12px;
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary);
    text-align: center;
    border: 2px solid var(--color-primary);
    border-radius: 6px;
    background: var(--color-card-bg);
}

.score-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(242, 188, 3, 0.2);
}

.question-score-item .question-max {
    color: var(--color-text-muted);
    font-size: 16px;
    font-weight: 600;
}

.total-score-display {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-ink);
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    margin: 20px 0;
    font-size: 24px;
    font-weight: 700;
}

.quick-actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.quick-actions button {
    flex: 1;
}

/* Student History */
#history-content {
    max-height: 70vh;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
}

#history-content::-webkit-scrollbar {
    width: 8px;
}

#history-content::-webkit-scrollbar-track {
    background: var(--color-scroll-track);
    border-radius: 10px;
}

#history-content::-webkit-scrollbar-thumb {
    background: var(--color-scroll-thumb);
    border-radius: 10px;
}

#history-content::-webkit-scrollbar-thumb:hover {
    background: var(--color-scroll-thumb-hover);
}

.history-timeline {
    padding: 20px;
}

.history-item {
    background: var(--color-card-bg);
    border-left: 4px solid var(--color-primary);
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--color-card-shadow);
    color: var(--color-text);
}

.history-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.history-item-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
}

.history-item-date {
    color: var(--color-text-muted);
    font-size: 14px;
}

.history-score-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.history-note {
    margin-top: 15px;
    padding: 12px;
    border-radius: 8px;
    background: var(--color-highlight-bg);
    color: var(--color-text);
}

.score-box {
    background: var(--color-highlight-bg);
    padding: 15px;
    border-radius: 8px;
    text-align: center;
}

.score-box-label {
    font-size: 12px;
    color: var(--color-text-muted);
    text-transform: uppercase;
    margin-bottom: 5px;
}

.score-box-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
}

.history-questions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
    margin-top: 15px;
}

.history-question-score {
    background: var(--color-panel-bg);
    padding: 10px;
    border-radius: 6px;
    text-align: center;
    border: 2px solid var(--color-card-border);
    color: var(--color-text);
}

.history-question-score.full-score {
    background: #d1fae5;
    border-color: #10b981;
}

.history-question-score.zero-score {
    background: #fee2e2;
    border-color: #ef4444;
}

.history-question-num {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-bottom: 5px;
}

.history-question-value {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text);
}

/* PDF Import Styles */
.btn-info {
    background: #93c5fd;
    color: var(--color-ink);
}

.btn-info:hover {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    transform: translateY(-1px);
}

input[type="file"] {
    width: 100%;
    padding: 12px;
    border: 2px dashed var(--color-panel-border);
    border-radius: 8px;
    background: var(--color-panel-bg);
    cursor: pointer;
    transition: all 0.3s ease;
}

input[type="file"]:hover {
    border-color: var(--color-secondary);
    background: var(--color-panel-bg);
}

.preview-summary {
    background: var(--color-panel-bg);
    border-left: 4px solid var(--color-secondary);
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 8px;
}

.preview-summary h4 {
    color: var(--color-secondary);
    margin-bottom: 10px;
}

.preview-summary ul {
    list-style: none;
}

.preview-summary li {
    padding: 5px 0;
    color: var(--color-text);
}

.preview-warnings {
    background: var(--color-highlight-bg);
    border-left: 4px solid var(--color-primary);
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 8px;
}

.preview-warnings h4 {
    color: var(--color-primary-dark);
    margin-bottom: 10px;
}

body[data-theme='dark'] .preview-warnings {
    border-left-color: var(--color-primary);
}

.error-list {
    list-style: none;
    color: #92400e;
}

body[data-theme='dark'] .error-list,
body[data-theme='dark'] .preview-warnings h4 {
    color: #fcd34d;
}

.error-list li {
    padding: 5px 0;
}

.error-list li:before {
    content: "⚠️ ";
    margin-right: 5px;
}

.preview-questions {
    background: var(--color-panel-bg);
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 8px;
}

.preview-questions h4 {
    color: var(--color-text);
    margin-bottom: 10px;
}

.preview-questions ol {
    padding-left: 20px;
}

.preview-questions li {
    padding: 8px 0;
    color: var(--color-text-muted);
}

.preview-questions .points {
    color: #10b981;
    font-weight: 600;
    margin-left: 8px;
}

.preview-keywords {
    background: var(--color-panel-bg);
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 8px;
}

.preview-keywords h4 {
    color: #6b21a8;
    margin-bottom: 10px;
}

.preview-keywords ul {
    list-style: none;
}

.preview-keywords li {
    padding: 5px 0;
    color: #581c87;
}

.preview-vecize {
    background: var(--color-panel-bg);
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 8px;
}

.preview-vecize h4 {
    color: #0f766e;
    margin-bottom: 10px;
}

.preview-vecize blockquote {
    border-left: 3px solid #14b8a6;
    padding-left: 15px;
    color: #134e4a;
    font-style: italic;
    margin: 10px 0;
}

.preview-vecize small {
    color: #0f766e;
}

.preview-checks {
    background: var(--color-panel-bg);
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 8px;
}

.preview-checks h4 {
    color: #92400e;
    margin-bottom: 10px;
}

.preview-checks ul {
    list-style: none;
}

.preview-checks li {
    padding: 5px 0;
    color: #78350f;
}

.preview-checks li:before {
    content: "✓ ";
    color: #10b981;
    font-weight: bold;
    margin-right: 5px;
}

/* Dinamik Soru Ekleme Stilleri */
.question-item {
    background: var(--color-panel-bg);
    border: 2px solid var(--color-panel-border);
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

.question-item:hover {
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(242, 188, 3, 0.15);
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-panel-border);
}

.question-number {
    font-weight: 700;
    color: var(--color-primary);
    font-size: 14px;
}

.btn-remove {
    background: #ef4444;
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.btn-remove:hover {
    background: #dc2626;
    transform: scale(1.05);
}

.question-fields {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.question-field {
    display: flex;
    flex-direction: column;
}

.question-field label {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-bottom: 5px;
    font-weight: 600;
}

.question-field textarea,
.question-field input {
    padding: 10px;
    border: 1px solid var(--color-panel-border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s ease;
}

.question-field textarea:focus,
.question-field input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(242, 188, 3, 0.15);
}

.question-field-inline {
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

#questions-container:empty::before {
    content: "Henüz soru eklenmedi. '➕ Soru Ekle' butonuna tıklayarak başlayın.";
    display: block;
    padding: 30px;
    text-align: center;
    color: var(--color-text-muted);
    font-style: italic;
    background: var(--color-panel-bg);
    border: 2px dashed var(--color-panel-border);
    border-radius: 8px;
}

/* Question Display Styles */
.questions-display {
    margin-top: 15px;
}

.question-display-item {
    background: var(--color-card-bg);
    border: 2px solid var(--color-panel-border);
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 12px;
    transition: all 0.3s ease;
}

.question-display-item:hover {
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(242, 188, 3, 0.15);
}

.question-display-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-card-border);
}

.question-display-number {
    font-weight: 700;
    color: var(--color-primary);
    font-size: 14px;
}

.question-display-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

.question-display-points {
    font-weight: 600;
    color: #10b981;
    font-size: 13px;
    background: #d1fae5;
    padding: 4px 10px;
    border-radius: 12px;
}

.question-display-text {
    color: var(--color-text);
    line-height: 1.6;
    font-size: 14px;
}

/* Student Multi-Select */
.student-multi-select {
    max-height: 300px;
    overflow-y: auto;
    border: 2px solid var(--color-panel-border);
    border-radius: 8px;
    padding: 10px;
    background: var(--color-panel-bg);
}

.student-checkbox-item {
    display: flex;
    align-items: center;
    padding: 10px;
    margin-bottom: 8px;
    background: var(--color-card-bg);
    border: 2px solid var(--color-panel-border);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.student-checkbox-item:hover {
    border-color: var(--color-primary);
    box-shadow: 0 2px 4px rgba(242, 188, 3, 0.15);
}

.student-checkbox-item.selected {
    background: var(--color-highlight-bg);
    border-color: var(--color-primary);
}

.student-checkbox-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-right: 12px;
    cursor: pointer;
}

.student-checkbox-item label {
    flex: 1;
    cursor: pointer;
    margin: 0;
    font-weight: 500;
    color: var(--color-text);
}

.student-checkbox-item.selected label {
    color: var(--color-primary);
}

.student-multi-select::-webkit-scrollbar {
    width: 8px;
}

.student-multi-select::-webkit-scrollbar-track {
    background: var(--color-scroll-track);
    border-radius: 10px;
}

.student-multi-select::-webkit-scrollbar-thumb {
    background: var(--color-scroll-thumb);
    border-radius: 10px;
}

.student-multi-select::-webkit-scrollbar-thumb:hover {
    background: var(--color-scroll-thumb-hover);
}

/* Filter Controls */
.filter-controls {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.search-container {
    display: flex;
    align-items: center;
    gap: 8px;
}

.search-toggle-btn {
    display: none;
    padding: 8px 12px;
    border: 2px solid var(--color-card-border);
    border-radius: 8px;
    background: var(--color-card-bg);
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s;
}

.search-toggle-btn:hover {
    border-color: var(--color-primary);
    background: var(--color-primary);
}

.search-input {
    padding: 8px 12px;
    border: 2px solid var(--color-card-border);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    background: var(--color-card-bg);
    transition: all 0.3s;
    width: 280px;
}

.filter-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.search-input:hover {
    border-color: var(--color-primary);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(242, 188, 3, 0.15);
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

/* Mobil için search toggle */
@media (max-width: 768px) {
    .search-toggle-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        padding: 0;
    }

    .search-container {
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .search-input {
        display: none;
        min-width: 0;
    }

    .search-input.active {
        display: block;
        width: 180px;
        padding: 8px 12px;
        border: 2px solid var(--color-primary);
        border-radius: 8px;
        font-size: 14px;
        background: var(--color-card-bg);
    }

    .search-container.expanded .search-toggle-btn {
        background: var(--color-primary);
        border-color: var(--color-primary);
    }

    /* Search overlay - mobilde kullanılmıyor */
    .search-overlay {
        display: none !important;
    }
}

.filter-select {
    padding: 8px 12px;
    border: 2px solid var(--color-card-border);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    background: var(--color-card-bg);
    cursor: pointer;
    transition: all 0.3s;
    min-width: 150px;
}

.filter-select:hover {
    border-color: var(--color-primary);
}

.filter-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(242, 188, 3, 0.15);
}

/* Grouped Students View */
.group-section {
    margin-bottom: 30px;
}

.group-header {
    background: var(--color-group-start);
    color: var(--color-text);
    padding: 15px 20px;
    border-radius: 12px 12px 0 0;
    font-size: 18px;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.group-count {
    background: rgba(255, 255, 255, 0.85);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 14px;
    color: var(--color-text);
}

.group-students {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 15px;
    padding: 20px;
    background: var(--color-panel-bg);
    border-radius: 0 0 12px 12px;
    border: 2px solid var(--color-card-border);
    border-top: none;
}

/* ========================================
   RESPONSIVE DESIGN - TABLET & MOBILE
   ======================================== */

/* Tablet (768px - 1024px) */
@media (max-width: 1024px) {
    .container {
        border-radius: 0;
    }

    header {
        padding: 20px 15px;
        flex-direction: column;
        gap: 15px;
    }

    header h1 {
        font-size: 24px;
    }

    .header-actions {
        flex-wrap: wrap;
        justify-content: center;
    }

    .user-menu {
        border-left: none;
        border-top: 1px solid rgba(255, 255, 255, 0.3);
        padding-top: 10px;
        padding-left: 0;
        margin-left: 0;
        width: 100%;
        justify-content: center;
    }

    .homeworks-list {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 15px;
    }

    .students-list {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }

    .modal-content {
        width: 95%;
        margin: 5% auto;
    }
}

/* Mobile Large (426px - 768px) */
@media (max-width: 768px) {
    body {
        padding: 0;
    }

    .container {
        border-radius: 0;
        box-shadow: none;
    }

    header {
        padding: 15px;
        border-radius: 0;
    }

    header h1 {
        font-size: 18px;
        text-align: left;
    }

    .brand {
        width: 100%;
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }

    .app-logo {
        height: 56px;
    }


    .header-actions {
        width: 100%;
        flex-direction: column;
        gap: 8px;
    }

    .header-actions .btn {
        width: 100%;
        padding: 12px 16px;
        font-size: 14px;
    }

    .user-menu {
        width: 100%;
        flex-direction: column;
        gap: 8px;
        padding-top: 10px;
    }

    .user-menu .btn {
        width: 100%;
    }

    /* Tabs */
    .tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .tab-btn {
        padding: 12px 10px;
        font-size: 14px;
        min-width: 80px;
        white-space: nowrap;
    }

    .tab-content {
        padding: 15px;
    }

    .section h2 {
        font-size: 20px;
    }

    .section-header {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: 10px;
        flex-wrap: wrap;
    }

    .section-header .btn {
        width: auto;
    }

    .section-header h2 {
        margin-bottom: 0;
    }

    /* Öğrenciler sekmesi için özel düzenleme */
    #students-filters.filter-controls {
        width: 100%;
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
        gap: 10px;
        margin-top: 10px;
    }

    #students-filters .search-container {
        order: 0;
    }

    .filter-controls {
        width: 100%;
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
        gap: 10px;
    }

    .section-header {
        flex-wrap: wrap;
    }

    .filter-select {
        width: 100%;
        min-width: auto;
    }

    .group-students {
        grid-template-columns: 1fr;
        padding: 15px;
    }

    /* Homework Cards */
    .homeworks-list {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .homework-card {
        padding: 15px;
    }

    .homework-card h3 {
        font-size: 16px;
    }

    .homework-meta {
        flex-direction: column;
        gap: 8px;
    }

    /* Student Cards */
    .students-list {
        grid-template-columns: 1fr;
    }

    .student-card {
        padding: 12px;
    }

    .student-actions {
        flex-direction: column;
    }

    .student-actions .btn {
        width: 100%;
    }

    /* Tables - Convert to Cards on Mobile */
    .progress-table,
    .users-table {
        display: block;
        overflow-x: visible;
    }

    .progress-table thead,
    .users-table thead {
        display: none;
    }

    .progress-table tbody,
    .users-table tbody {
        display: block;
    }

    .progress-table tr,
    .users-table tr {
        display: block;
        margin-bottom: 15px;
        background: var(--color-card-bg);
        border: 2px solid var(--color-card-border);
        border-radius: 12px;
        padding: 15px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    }

    .progress-table tr:hover,
    .users-table tr:hover {
        background: var(--color-card-bg);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }

    .progress-table td,
    .users-table td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 10px 0;
        border-bottom: 1px solid var(--color-card-border);
        text-align: right;
    }

    .progress-table td:last-child,
    .users-table td:last-child {
        border-bottom: none;
        padding-top: 15px;
        margin-top: 10px;
        border-top: 2px solid var(--color-card-border);
    }

    .progress-table td::before,
    .users-table td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--color-primary);
        text-align: left;
        flex: 1;
    }

    /* Action buttons in table cards */
    .progress-table td:last-child,
    .users-table td:last-child {
        flex-direction: column;
        gap: 8px;
    }

    .progress-table td:last-child::before,
    .users-table td:last-child::before {
        display: none;
    }

    .progress-table td .btn,
    .users-table td .btn {
        width: 100%;
        margin: 0;
    }

    /* Buttons */
    .btn {
        padding: 12px 16px;
        font-size: 14px;
        min-height: 44px; /* Touch-friendly */
    }

    .btn-small,
    .btn-sm {
        padding: 10px 14px;
        font-size: 13px;
        min-height: 40px;
    }

    /* Modal */
    .modal-content {
        width: 100%;
        max-width: 100%;
        margin: 0;
        border-radius: 16px 16px 0 0;
        max-height: 95vh;
        position: fixed;
        bottom: 0;
        animation: modalSlideUp 0.3s;
    }

    @keyframes modalSlideUp {
        from {
            transform: translateY(100%);
        }
        to {
            transform: translateY(0);
        }
    }

    .modal-header {
        padding: 15px 20px;
        position: sticky;
        top: 0;
        background: var(--color-card-bg);
        z-index: 1;
    }

    .modal-header h2 {
        font-size: 18px;
    }

    form {
        padding: 15px 20px;
    }

    .modal-footer {
        padding: 15px 20px;
        position: sticky;
        bottom: 0;
        background: var(--color-card-bg);
        flex-direction: column-reverse;
        gap: 8px;
    }

    .modal-footer .btn {
        width: 100%;
        margin: 0;
    }

    /* Form Elements */
    .form-group input,
    .form-group textarea,
    .form-group select {
        font-size: 16px; /* Prevents zoom on iOS */
        min-height: 44px;
    }

    .form-group textarea {
        min-height: 100px;
    }

    /* Scoring Forms */
    .question-score {
        grid-template-columns: 1fr;
        gap: 10px;
        padding: 12px;
    }

    .question-score input {
        width: 100%;
        font-size: 18px;
        min-height: 44px;
    }

    .quick-scoring-grid {
        padding: 15px;
        gap: 12px;
    }

    .question-score-item {
        grid-template-columns: 1fr;
        gap: 10px;
        padding: 12px;
    }

    .score-input-group {
        justify-content: space-between;
        width: 100%;
    }

    .score-input {
        width: 100px;
        font-size: 20px;
        min-height: 44px;
    }

    .question-checkbox-item {
        grid-template-columns: auto 1fr;
        gap: 10px;
        padding: 12px;
    }

    .question-checkbox-item input[type="checkbox"] {
        width: 28px;
        height: 28px;
    }

    .question-checkbox-item .question-points {
        grid-column: 2;
        text-align: right;
    }

    .total-score-display {
        font-size: 20px;
        padding: 15px;
    }

    /* Homework Info */
    .homework-info-box {
        padding: 15px;
    }

    /* Question Display */
    .question-display-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .question-display-actions {
        width: 100%;
        flex-direction: column;
    }

    .question-display-actions .btn {
        width: 100%;
    }

    /* History */
    #history-content {
        max-height: calc(95vh - 80px); /* Modal height - header height */
        -webkit-overflow-scrolling: touch;
    }

    .history-timeline {
        padding: 15px;
    }

    .history-item {
        padding: 15px;
    }

    .history-score-summary {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .history-questions-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }

    /* Dynamic Questions */
    .question-item {
        padding: 12px;
    }

    .question-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .btn-remove {
        width: 100%;
    }

    /* User/Group Selectors */
    .user-multi-select,
    .user-groups-selector,
    .student-multi-select {
        max-height: 250px;
    }

    .checkbox-label {
        padding: 8px 0;
    }

    .checkbox-label input[type="checkbox"] {
        width: 20px;
        height: 20px;
    }
}

/* Mobile Small (320px - 425px) */
@media (max-width: 425px) {
    header h1 {
        font-size: 18px;
    }

    .app-logo {
        height: 48px;
    }


    .tab-btn {
        padding: 10px 8px;
        font-size: 13px;
        min-width: 70px;
    }

    .tab-content {
        padding: 12px;
    }

    .section h2 {
        font-size: 18px;
    }

    .homework-card,
    .student-card {
        padding: 12px;
    }

    .btn {
        font-size: 13px;
        padding: 10px 14px;
    }

    .modal-header h2 {
        font-size: 16px;
    }

    .score-input {
        width: 80px;
        font-size: 18px;
    }

    .total-score-display {
        font-size: 18px;
        padding: 12px;
    }

    #history-content {
        max-height: calc(95vh - 70px);
    }

    .history-timeline {
        padding: 12px;
    }

    .history-item {
        padding: 12px;
    }

    .history-questions-grid {
        grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    }
}

/* Landscape Mode Adjustments for Mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .modal-content {
        max-height: 98vh;
        border-radius: 0;
    }

    .modal-header,
    .modal-footer {
        padding: 10px 15px;
    }

    form {
        padding: 10px 15px;
    }

    .form-group {
        margin-bottom: 12px;
    }

    .quick-scoring-grid,
    .scoring-form {
        padding: 10px;
    }

    .question-score-item,
    .question-checkbox-item {
        padding: 8px;
    }

    #history-content {
        max-height: calc(98vh - 60px);
    }

    .history-timeline {
        padding: 10px;
    }

    .history-item {
        padding: 10px;
        margin-bottom: 10px;
    }
}

/* Touch Improvements */
@media (hover: none) and (pointer: coarse) {
    /* Better touch targets */
    .btn,
    button,
    a {
        min-height: 44px;
        min-width: 44px;
    }

    /* Larger checkboxes and radio buttons */
    input[type="checkbox"],
    input[type="radio"] {
        min-width: 20px;
        min-height: 20px;
    }

    /* Remove hover effects on touch devices */
    .homework-card:hover,
    .student-card:hover,
    .question-score-item:hover,
    .question-checkbox-item:hover {
        transform: none;
    }

    /* Active states for touch feedback */
    .btn:active {
        transform: scale(0.98);
        opacity: 0.9;
    }

    .homework-card:active,
    .student-card:active {
        opacity: 0.9;
    }
}

/* Print Styles */
@media print {
    body {
        background: var(--color-card-bg);
        padding: 0;
    }

    .container {
        box-shadow: none;
    }

    header,
    .tabs,
    .btn,
    .modal,
    .header-actions,
    .student-actions,
    .homework-actions {
        display: none !important;
    }

    .tab-content {
        display: block !important;
    }

    .progress-table,
    .users-table {
        page-break-inside: avoid;
    }
}

/* Ara Butonu */
.call-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
    color: white;
    text-decoration: none;
    border-radius: 50%;
    font-size: 16px;
    margin-left: 8px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 5px rgba(76, 175, 80, 0.3);
    cursor: pointer;
}

.call-button:hover {
    background: linear-gradient(135deg, #45a049 0%, #3d8b40 100%);
    transform: scale(1.1);
    box-shadow: 0 4px 8px rgba(76, 175, 80, 0.5);
}

.call-button:active {
    transform: scale(0.95);
}

body[data-theme="dark"] .call-button {
    background: linear-gradient(135deg, #5fbe62 0%, #4fa851 100%);
    box-shadow: 0 2px 5px rgba(95, 190, 98, 0.4);
}

body[data-theme="dark"] .call-button:hover {
    background: linear-gradient(135deg, #4fa851 0%, #45924a 100%);
    box-shadow: 0 4px 8px rgba(95, 190, 98, 0.6);
}

/* Öğrenci İletişim Bilgisi (Modal İçinde) */
.student-contact-info {
    margin-bottom: 20px;
    padding: 12px;
    background: var(--color-panel-bg);
    border-radius: 8px;
    text-align: center;
}

.call-button-inline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 2px 5px rgba(76, 175, 80, 0.3);
    cursor: pointer;
    gap: 8px;
}

.call-button-inline:hover {
    background: linear-gradient(135deg, #45a049 0%, #3d8b40 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(76, 175, 80, 0.5);
}

.call-button-inline:active {
    transform: translateY(0);
    box-shadow: 0 2px 5px rgba(76, 175, 80, 0.3);
}

body[data-theme="dark"] .call-button-inline {
    background: linear-gradient(135deg, #5fbe62 0%, #4fa851 100%);
    box-shadow: 0 2px 5px rgba(95, 190, 98, 0.4);
}

body[data-theme="dark"] .call-button-inline:hover {
    background: linear-gradient(135deg, #4fa851 0%, #45924a 100%);
    box-shadow: 0 4px 10px rgba(95, 190, 98, 0.6);
}

/* Telefon Linkleri (Öğrenci Kartlarında) */
.phone-link {
    color: #4CAF50;
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    border-radius: 6px;
    transition: all 0.3s ease;
    -webkit-tap-highlight-color: rgba(76, 175, 80, 0.2);
    cursor: pointer;
}

.phone-link:hover {
    background: rgba(76, 175, 80, 0.1);
    color: #45a049;
    text-decoration: underline;
}

.phone-link:active {
    background: rgba(76, 175, 80, 0.2);
    transform: scale(0.98);
}

body[data-theme="dark"] .phone-link {
    color: #5fbe62;
}

body[data-theme="dark"] .phone-link:hover {
    background: rgba(95, 190, 98, 0.15);
    color: #4fa851;
}

body[data-theme="dark"] .phone-link:active {
    background: rgba(95, 190, 98, 0.25);
}

/* Android uyumluluğu için ek stiller */
@supports (-webkit-touch-callout: none) {
    /* iOS için */
    .phone-link,
    .call-button-inline {
        -webkit-touch-callout: default;
    }
}

/* Android için açık tıklama alanı */
.phone-link,
.call-button-inline {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Touch cihazlar için daha büyük tıklama alanı */
@media (hover: none) and (pointer: coarse) {
    .phone-link,
    .call-button-inline {
        min-height: 48px;
        padding: 8px 12px;
        font-size: 16px;
    }
}

/* Aktivite Yönetimi Stilleri */
.period-generator {
    background: var(--color-panel-bg);
    border: 1px solid var(--color-panel-border);
    border-radius: 8px;
    padding: 20px;
}

.periods-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.period-group h4 {
    margin-bottom: 12px;
    color: var(--color-text);
    font-size: 1.1em;
}

.period-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}

.period-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: 8px;
    padding: 12px;
    transition: box-shadow 0.2s;
}

.period-card:hover {
    box-shadow: 0 2px 8px var(--color-card-shadow);
}

.period-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    gap: 8px;
}

.period-header > div {
    display: flex;
    gap: 4px;
    align-items: center;
}

.period-header strong {
    color: var(--color-text);
    font-size: 0.95em;
}

.period-dates {
    font-size: 0.85em;
    color: var(--color-text-muted);
    margin-bottom: 8px;
}

.period-content {
    font-size: 0.85em;
    color: var(--color-text);
    background: var(--color-panel-bg);
    padding: 6px 8px;
    border-radius: 4px;
    margin-bottom: 8px;
    font-style: italic;
}

.period-progress {
    display: flex;
    align-items: center;
    gap: 8px;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: var(--color-panel-border);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #4ade80, #22c55e);
    border-radius: 4px;
    transition: width 0.3s;
}

.period-progress span {
    font-size: 0.8em;
    color: var(--color-text-muted);
    min-width: 40px;
    text-align: right;
}

.period-group-name {
    margin-top: 8px;
    font-size: 0.8em;
    color: var(--color-text-muted);
}

/* Mobil uyumluluk */
@media (max-width: 768px) {
    .period-cards {
        grid-template-columns: 1fr;
    }

    .period-generator .form-group {
        margin-bottom: 10px;
    }
}

/* ========== MANEVİYAT TAKİP ========== */
.maneviyat-track-container {
    margin-top: 15px;
    overflow: hidden;
    transition: all 0.3s ease-in-out;
}

#toggle-maneviyat-btn {
    display: flex;
    align-items: center;
    gap: 5px;
}

#maneviyat-toggle-icon {
    font-size: 0.8em;
    transition: transform 0.3s ease;
}

.activities-quick-track {
    margin-top: 10px;
}

.activities-table-container {
    overflow-x: auto;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.activities-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-bg);
    font-size: 0.95em;
}

.activities-table thead {
    background: var(--color-primary);
    color: white;
    position: sticky;
    top: 0;
    z-index: 10;
}

.activities-table th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid rgba(0,0,0,0.1);
    vertical-align: middle;
}

.activities-table th:first-child {
    min-width: 200px;
}

.activities-table th:not(:first-child) {
    text-align: center;
    min-width: 120px;
    padding: 12px 8px;
}

.activities-table th:not(:first-child),
.activities-table td:not(:first-child) {
    display: table-cell;
    vertical-align: middle;
}

.activity-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    min-height: 44px;
    line-height: 1.2;
    color: #000 !important; /* Header yazılarını siyah yap */
}

[data-theme="dark"] .activity-header {
    color: #fff !important; /* Karanlık temada beyaz */
}

/* Karanlık tema için sticky sütun background'ları */
@media (max-width: 768px) {
    [data-theme="dark"] .activities-table td:first-child {
        background: var(--color-bg) !important;
    }

    [data-theme="dark"] .activities-table tbody tr:hover td:first-child {
        background: var(--color-hover) !important;
    }
}

.activities-table tbody tr {
    border-bottom: 1px solid var(--color-border);
    transition: background-color 0.2s ease;
}

.activities-table tbody tr:hover {
    background: var(--color-hover);
}

.activities-table td {
    padding: 12px;
    vertical-align: middle;
}

.activities-table td:first-child {
    font-weight: 500;
}

.activities-table td:not(:first-child) {
    text-align: center;
    padding: 12px 8px;
}

.activity-checkbox-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    min-height: 44px;
    cursor: pointer;
}

.activity-checkbox {
    width: 24px;
    height: 24px;
    cursor: pointer;
    transform: scale(1.2);
    accent-color: var(--color-success);
    margin: 0;
    vertical-align: middle;
}

.activity-checkbox:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.loading-state, .empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--color-text-muted);
}

.empty-state p {
    margin: 8px 0;
}

.text-muted {
    color: var(--color-text-muted);
    font-size: 0.9em;
}

/* Mobil görünüm için optimizasyon */
@media (max-width: 768px) {
    /* Tablo container'ı yatay scroll yapılabilir hale getir */
    .activities-table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin: 0 -15px; /* Kenarlardan kenara */
        padding: 0 15px;
    }

    .activities-table {
        font-size: 0.9em;
        min-width: 500px; /* Daha küçük minimum genişlik */
    }

    /* İlk kolon (öğrenci ismi) sticky olsun - diğerlerinin üstünde */
    .activities-table th:first-child {
        min-width: 120px;
        max-width: 150px;
        position: sticky;
        left: 0;
        background: var(--color-primary) !important;
        z-index: 100 !important; /* Çok yüksek z-index */
        box-shadow: 2px 0 4px rgba(0,0,0,0.15);
    }

    .activities-table td:first-child {
        min-width: 120px;
        max-width: 150px;
        position: sticky;
        left: 0;
        background: var(--color-bg) !important;
        z-index: 99 !important; /* Header'dan biraz düşük ama diğerlerinden yüksek */
        font-size: 0.95em;
        font-weight: 600;
        box-shadow: 2px 0 4px rgba(0,0,0,0.15);
    }

    .activities-table tbody tr:hover td:first-child {
        background: var(--color-hover) !important;
    }

    /* Diğer sütunlar sticky sütunun altında kalsın */
    .activities-table th:not(:first-child),
    .activities-table td:not(:first-child) {
        position: relative;
        z-index: 1;
    }

    /* Aktivite kolonları */
    .activities-table th:not(:first-child) {
        min-width: 100px;
        padding: 12px 8px;
    }

    .activities-table td:not(:first-child) {
        min-width: 100px;
        padding: 12px 8px;
    }

    /* Header içindeki yazılar */
    .activity-header {
        gap: 5px;
        min-height: 48px;
        font-size: 0.9em;
        flex-direction: column;
        padding: 4px;
    }

    /* Checkbox wrapper - daha büyük dokunma alanı */
    .activity-checkbox-wrapper {
        min-height: 48px;
        padding: 8px;
    }

    /* Checkbox - mobilde daha büyük */
    .activity-checkbox {
        width: 28px;
        height: 28px;
        transform: scale(1.3);
    }

    /* Satır yüksekliği */
    .activities-table th,
    .activities-table td {
        padding: 14px 8px;
    }

    /* Loading ve empty state */
    .loading-state, .empty-state {
        padding: 30px 15px;
        font-size: 0.95em;
    }

    /* Section header mobilde daha kompakt */
    .section-header h2 {
        font-size: 1.3em;
    }
}

/* Çok küçük ekranlar için ekstra optimizasyon */
@media (max-width: 480px) {
    .activities-table {
        font-size: 0.85em;
    }

    .activities-table th:first-child {
        min-width: 100px;
        max-width: 120px;
        font-size: 0.9em;
        background: var(--color-primary) !important;
        z-index: 100 !important;
    }

    .activities-table td:first-child {
        min-width: 100px;
        max-width: 120px;
        font-size: 0.9em;
        background: var(--color-bg) !important;
        z-index: 99 !important;
    }

    .activities-table th:not(:first-child),
    .activities-table td:not(:first-child) {
        min-width: 85px;
        z-index: 1;
    }

    .activity-header {
        font-size: 0.85em;
        gap: 3px;
    }

    .activity-checkbox {
        width: 26px;
        height: 26px;
        transform: scale(1.2);
    }
}

/* ========== AUTH LOADING OVERLAY ========== */
.auth-loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, var(--color-bg-start) 0%, var(--color-bg-end) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.3s ease;
}

.auth-loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.auth-loading-spinner {
    text-align: center;
}

.auth-loading-spinner p {
    margin-top: 20px;
    color: var(--color-text);
    font-size: 1.1em;
    font-weight: 500;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--color-primary-light);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}