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

:root {
    --primary-color: #e58641;
    --secondary-color: #e22517;
    --accent-color: #ec4899;
    --light-bg: #f8fafc;
    --card-bg: #ffffff55;
    --text-dark: #f12a31;
    --text-light: #e61c12;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

body {
    min-height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--light-bg);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

body.auth-pending {
    visibility: hidden;
}

.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 0;
    text-align: center;
    box-shadow: var(--shadow);
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.header h1 i {
    font-size: 2.8rem;
}

.header h1 span {
    white-space: nowrap;
}

.logo {
    height: 49px;
    width: auto;
    margin-right: 0.15rem;
    flex: 0 0 auto;
    object-fit: contain;
    border-radius: 15px;
}

.header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

.top-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: 1rem;
}

.video-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -2;
}

main {
    min-height: 70vh;
    padding: 3rem 2rem;
}

.subjects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

.subject-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    cursor: pointer;
    border: 2px solid transparent;
    min-width: 0;
}

.subject-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.subject-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: white;
    margin-bottom: 1rem;
}

.subject-card h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    text-decoration: underline;
    overflow-wrap: anywhere;
}

.subject-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    overflow-wrap: anywhere;
}

.topic-count {
    display: inline-block;
    background: var(--light-bg);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--primary-color);
    font-weight: 600;
}

.topics-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
}

.topic-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.2rem;
    background: var(--light-bg);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.topic-item:hover {
    background: rgba(99, 102, 241, 0.05);
    transform: translateX(4px);
}

.topic-name {
    font-weight: 500;
    color: var(--text-dark);
    min-width: 0;
    overflow-wrap: anywhere;
}

.pdf-btn,
.logout-btn,
.login-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    cursor: pointer;
    font-weight: 700;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.pdf-btn {
    padding: 0.6rem 1.4rem;
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    white-space: nowrap;
}

.pdf-btn:hover,
.logout-btn:hover,
.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.pdf-btn:active {
    transform: scale(0.98);
}

.logout-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    border-radius: 8px;
    padding: 0.7rem 1rem;
    white-space: nowrap;
}

.logout-btn:disabled,
.login-btn:disabled {
    cursor: wait;
    opacity: 0.75;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.modal-content {
    background-color: var(--card-bg);
    padding: 2.5rem;
    border-radius: 12px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
}

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

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    color: var(--text-light);
    float: right;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

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

#modalTitle {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

.footer {
    background: var(--text-dark);
    color: white;
    text-align: center;
    padding: 2rem;
}

.ecce-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.ecce-title h2 {
    color: var(--primary-color);
    font-size: 2rem;
    line-height: 1.2;
}

.ecce-title p {
    color: var(--text-light);
    font-weight: 600;
}

.viewer-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 1rem;
    min-height: 70vh;
    align-items: stretch;
}

.notes-list {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 1rem;
    overflow: auto;
    min-width: 0;
}

.notes-list h3 {
    color: var(--primary-color);
    margin-bottom: 0.8rem;
}

.note-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.55rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: white;
    color: var(--text-dark);
    cursor: pointer;
    font: inherit;
    font-weight: 700;
    margin-bottom: 0.65rem;
    padding: 0.75rem;
    text-align: left;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.note-btn:hover,
.note-btn.active {
    border-color: var(--primary-color);
    transform: translateX(3px);
}

.pdf-panel {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    overflow: hidden;
    min-height: 70vh;
    min-width: 0;
}

.pdf-viewer {
    width: 100%;
    height: 100%;
    min-height: 70vh;
    border: 0;
    display: block;
    background: white;
}

.student-marquee {
    position: relative;
    left: 0;
    right: 0;
    z-index: 1001;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-weight: 700;
    padding: 0.55rem 0;
}

.auth-page {
    min-height: 100vh;
    background:
        radial-gradient(circle at top, rgba(229, 134, 65, 0.18), transparent 35%),
        linear-gradient(135deg, #fff7ed 0%, #fffbeb 100%);
}

.login-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

.login-panel {
    width: 100%;
    max-width: 440px;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(226, 232, 240, 0.9);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    padding: 2rem;
}

.login-brand {
    text-align: center;
    margin-bottom: 1.5rem;
}

.login-logo {
    width: 88px;
    height: 88px;
    object-fit: contain;
    margin-bottom: 0.9rem;
}

.login-badge {
    color: var(--secondary-color);
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 0.35rem;
}

.login-brand h1 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 0.35rem;
}

.login-subtitle,
.login-help {
    color: #7c2d12;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.login-field label {
    display: block;
    margin-bottom: 0.4rem;
    color: #7c2d12;
    font-weight: 700;
}

.login-field input {
    width: 100%;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.85rem 1rem;
    font: inherit;
    color: #1f2937;
    background: white;
    outline: none;
}

.login-field input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(229, 134, 65, 0.2);
}

.login-btn {
    width: 100%;
    border-radius: 10px;
    font-size: 1rem;
    padding: 0.9rem 1rem;
}

.auth-message {
    border-radius: 10px;
    padding: 0.85rem 1rem;
    font-size: 0.95rem;
    font-weight: 600;
}

.auth-message.error {
    background: #fff1f2;
    color: #be123c;
    border: 1px solid #fecdd3;
}

.auth-message.success {
    background: #ecfdf5;
    color: #047857;
    border: 1px solid #a7f3d0;
}

.login-tabs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.login-tab {
    border: 1px solid rgba(229, 134, 65, 0.25);
    border-radius: 999px;
    background: #fff7ed;
    color: #9a3412;
    cursor: pointer;
    font: inherit;
    font-weight: 700;
    padding: 0.85rem 1rem;
    transition: all 0.2s ease;
}

.login-tab.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: var(--shadow);
}

.login-tab-panel {
    animation: fadeIn 0.2s ease;
}

.admin-page {
    background:
        radial-gradient(circle at top right, rgba(226, 37, 23, 0.08), transparent 30%),
        linear-gradient(180deg, #fff7ed 0%, #f8fafc 100%);
}

.admin-hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.admin-hero h2 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 0.35rem;
}

.admin-hero-copy,
.admin-note {
    color: #7c2d12;
}

.admin-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.admin-card {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(226, 232, 240, 0.95);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 1.5rem;
    min-width: 0;
}

.admin-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

.admin-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.danger-btn {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
}

.admin-table-card {
    overflow: hidden;
}

.admin-table-header {
    margin-bottom: 1rem;
}

.table-wrap {
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th,
.admin-table td {
    border-bottom: 1px solid var(--border-color);
    padding: 0.95rem 0.75rem;
    text-align: left;
    overflow-wrap: anywhere;
}

.admin-table th {
    color: #7c2d12;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.admin-empty {
    color: #7c2d12;
    text-align: center;
}

.resource-placeholder {
    max-width: 720px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--shadow);
    padding: 2rem;
    text-align: center;
}

.resource-placeholder h2 {
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.resource-placeholder p {
    color: #7c2d12;
    overflow-wrap: anywhere;
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

@media (max-width: 768px) {
    .header h1 {
        font-size: 2rem;
        gap: 0.75rem;
    }

    .header h1 i {
        font-size: 2.2rem;
    }

    .header h1 span {
        white-space: normal;
    }

    .header p {
        font-size: 1rem;
    }

    .container {
        padding: 1rem;
    }

    main {
        padding: 2rem 1rem;
    }

    .subjects-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .modal-content {
        padding: 2rem;
        width: 95%;
        max-height: 85vh;
    }

    #modalTitle {
        font-size: 1.5rem;
    }

    .ecce-header-row {
        align-items: flex-start;
        flex-direction: column;
    }

    .viewer-layout {
        grid-template-columns: 1fr;
    }

    .notes-list {
        max-height: none;
    }

    .pdf-panel,
    .pdf-viewer {
        min-height: 62vh;
    }

    .ecce-title h2 {
        font-size: 1.6rem;
    }

    .top-actions {
        justify-content: flex-start;
    }

    .top-actions,
    .logout-btn {
        width: 100%;
    }

    .logout-btn {
        max-width: 220px;
    }

    .admin-grid {
        grid-template-columns: 1fr;
    }

    .admin-hero {
        align-items: flex-start;
        flex-direction: column;
    }

    .admin-table {
        min-width: 560px;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 2rem 1rem;
    }

    .header h1 {
        font-size: 1.5rem;
        gap: 0.5rem;
    }

    .header h1 i {
        font-size: 1.8rem;
    }

    .logo {
        height: 38px;
    }

    .subject-card {
        padding: 1.5rem;
    }

    .pdf-btn {
        justify-content: center;
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
        width: 100%;
    }

    .topic-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.8rem;
    }

    .topic-item .pdf-btn {
        align-self: stretch;
    }

    .modal-content {
        padding: 1.5rem;
        width: calc(100% - 1rem);
    }

    .login-panel {
        padding: 1.5rem;
        border-radius: 16px;
    }

    .login-brand h1 {
        font-size: 1.7rem;
    }

    .login-tabs {
        grid-template-columns: 1fr;
    }

    .admin-card {
        padding: 1.2rem;
    }

    .admin-hero h2 {
        font-size: 1.6rem;
    }

    .notes-list,
    .pdf-panel,
    .resource-placeholder,
    .admin-card {
        border-radius: 14px;
    }

    .pdf-panel,
    .pdf-viewer {
        min-height: 56vh;
    }

    .student-marquee {
        font-size: 0.9rem;
        padding-inline: 0.75rem;
    }
}