:root {
    --admin-bg: #eef4fb;
    --admin-bg-alt: #dfeaf8;
    --admin-surface: rgba(255, 255, 255, 0.9);
    --admin-surface-strong: #ffffff;
    --admin-line: rgba(19, 48, 84, 0.08);
    --admin-line-strong: rgba(19, 48, 84, 0.14);
    --admin-text: #10213a;
    --admin-muted: #667a93;
    --admin-brand: #0f7ae5;
    --admin-brand-deep: #0d5ec3;
    --admin-accent: #12b981;
    --admin-warning: #f59e0b;
    --admin-danger: #ef4444;
    --admin-shadow-lg: 0 28px 70px rgba(16, 33, 58, 0.12);
    --admin-shadow-md: 0 18px 40px rgba(16, 33, 58, 0.08);
    --admin-radius-lg: 28px;
    --admin-radius-md: 20px;
    --admin-radius-sm: 14px;
    --admin-sidebar: linear-gradient(180deg, #0a1627 0%, #10233d 52%, #0f1f35 100%);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body.admin-page {
    margin: 0;
    min-height: 100vh;
    font-family: 'Manrope', 'Segoe UI', sans-serif;
    color: var(--admin-text);
    background:
        radial-gradient(circle at top left, rgba(15, 122, 229, 0.16), transparent 22%),
        radial-gradient(circle at 88% 8%, rgba(18, 185, 129, 0.12), transparent 20%),
        linear-gradient(180deg, var(--admin-bg) 0%, var(--admin-bg-alt) 100%);
    display: flex;
}

body.admin-login-page {
    display: block;
}

body.admin-page::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.35) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.35) 1px, transparent 1px);
    background-size: 72px 72px;
    mask-image: radial-gradient(circle at center, black 18%, transparent 88%);
    opacity: 0.18;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
}

.admin-sidebar {
    width: 300px;
    background: var(--admin-sidebar);
    color: #eff7ff;
    padding: 28px 22px;
    min-height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    box-shadow: 18px 0 48px rgba(4, 10, 18, 0.18);
    overflow-y: auto;
    z-index: 10;
}

.admin-login-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 32px 18px;
}

.admin-login-card {
    width: min(100%, 460px);
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.95);
    border-radius: 30px;
    box-shadow: var(--admin-shadow-lg);
    backdrop-filter: blur(20px);
    padding: 30px;
    position: relative;
    z-index: 1;
}

.admin-login-brand {
    margin-bottom: 24px;
}

.admin-login-kicker {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 0 14px;
    border-radius: 999px;
    background: rgba(15, 122, 229, 0.1);
    color: var(--admin-brand-deep);
    font-size: 0.84rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.admin-login-brand h1 {
    margin: 14px 0 10px;
    font-family: 'Space Grotesk', 'Segoe UI', sans-serif;
    font-size: clamp(2rem, 4vw, 2.8rem);
    line-height: 0.96;
}

.admin-login-brand p,
.admin-login-meta,
.admin-login-meta a {
    color: var(--admin-muted);
}

.admin-login-form {
    display: grid;
    gap: 14px;
}

.admin-login-form label {
    font-weight: 800;
    color: var(--admin-text);
}

.admin-login-form input {
    width: 100%;
    min-height: 52px;
    border-radius: 16px;
    border: 1px solid var(--admin-line-strong);
    background: rgba(255, 255, 255, 0.94);
    padding: 0 16px;
    font: inherit;
    color: var(--admin-text);
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.admin-login-form input:focus {
    border-color: rgba(15, 122, 229, 0.5);
    box-shadow: 0 0 0 4px rgba(15, 122, 229, 0.12);
}

.admin-login-alert {
    border-radius: 16px;
    padding: 14px 16px;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.18);
    color: #991b1b;
    font-weight: 700;
}

.btn-admin-login,
.btn-logout {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 18px;
    border-radius: 16px;
    border: 0;
    background: linear-gradient(135deg, var(--admin-brand), var(--admin-brand-deep));
    color: #fff;
    text-decoration: none;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 16px 28px rgba(15, 122, 229, 0.22);
}

.btn-admin-login:hover,
.btn-logout:hover {
    transform: translateY(-2px);
}

.admin-login-meta {
    margin-top: 20px;
    display: flex;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 0.95rem;
}

.sidebar-header {
    padding: 0 0 26px;
    margin-bottom: 26px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.admin-logo {
    height: 46px;
    width: auto;
    margin-bottom: 14px;
    filter: drop-shadow(0 12px 24px rgba(76, 201, 240, 0.14));
}

.sidebar-header h2,
.admin-header h1,
.dashboard-summary h2,
.datas-importantes h2,
.modulos-admin h2,
.estatisticas h2,
.acoes-rapidas h2,
.ultimas-atividades h2,
.settings-section h2,
.info-section h3,
.module-editor h2,
.aula-editor h2,
.report-card h3 {
    font-family: 'Space Grotesk', 'Segoe UI', sans-serif;
}

.sidebar-header h2 {
    margin: 0 0 8px;
    font-size: 1.45rem;
    line-height: 1.05;
}

.sidebar-header p {
    margin: 0;
    color: rgba(239, 247, 255, 0.72);
    font-size: 0.92rem;
    line-height: 1.5;
}

.sidebar-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.35rem;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    min-height: 48px;
    padding: 0.85rem 1rem;
    border-radius: 16px;
    color: rgba(239, 247, 255, 0.74);
    text-decoration: none;
    font-weight: 700;
    transition: background-color 0.24s ease, color 0.24s ease, transform 0.24s ease;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(4px);
}

.admin-main {
    margin-left: 300px;
    width: calc(100% - 300px);
    min-height: 100vh;
    padding: 26px;
}

.admin-header {
    background: rgba(255, 255, 255, 0.76);
    border: 1px solid rgba(255, 255, 255, 0.9);
    box-shadow: var(--admin-shadow-md);
    backdrop-filter: blur(20px);
    border-radius: var(--admin-radius-lg);
    padding: 22px 26px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 22px;
}

.admin-header h1 {
    margin: 0;
    font-size: clamp(1.8rem, 3vw, 2.7rem);
    line-height: 0.96;
    color: var(--admin-text);
}

.admin-user {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.admin-user span {
    color: var(--admin-muted);
    font-weight: 700;
}

.admin-content {
    display: grid;
    gap: 22px;
}

.dashboard-summary,
.datas-importantes,
.modulos-admin,
.estatisticas,
.acoes-rapidas,
.ultimas-atividades,
.settings-section,
.info-section,
.module-editor,
.aula-editor {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.92);
    border-radius: var(--admin-radius-lg);
    padding: 24px;
    box-shadow: var(--admin-shadow-md);
    backdrop-filter: blur(20px);
}

.dashboard-summary h2,
.datas-importantes h2,
.modulos-admin h2,
.estatisticas h2,
.acoes-rapidas h2,
.ultimas-atividades h2,
.settings-section h2,
.info-section h3 {
    margin: 0 0 18px;
    font-size: 1.35rem;
    color: var(--admin-text);
}

.summary-grid,
.datas-grid,
.stats-grid,
.report-cards,
.acoes-grid,
.module-details,
.aula-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.summary-card,
.data-card,
.stat-box,
.report-card,
.acao-card,
.detail-box,
.settings-group,
.instructions,
.info-row {
    border-radius: var(--admin-radius-md);
    box-shadow: var(--admin-shadow-md);
}

.summary-card {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(246, 250, 255, 0.92));
    border: 1px solid var(--admin-line);
    padding: 20px;
    display: flex;
    gap: 16px;
    align-items: center;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.summary-card:hover,
.acao-card:hover,
.report-card:hover,
.detail-box:hover,
.data-card:hover,
.stat-box:hover {
    transform: translateY(-3px);
    box-shadow: 0 24px 44px rgba(16, 33, 58, 0.14);
}

.card-icon,
.acao-icon {
    width: 58px;
    height: 58px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(15, 122, 229, 0.14), rgba(18, 185, 129, 0.1));
    font-size: 1.8rem;
}

.card-info {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.card-label,
.stat-box h3,
.data-card strong,
.setting-note,
.instructions li,
.info-label {
    color: var(--admin-muted);
}

.card-value,
.big-number,
.stat-value {
    color: var(--admin-brand);
    font-weight: 800;
    line-height: 1;
}

.card-value,
.big-number {
    font-size: clamp(2rem, 3vw, 2.8rem);
}

.data-card,
.report-card {
    background: linear-gradient(135deg, var(--admin-brand), var(--admin-brand-deep));
    color: white;
    padding: 20px;
}

.data-card strong,
.report-card h3,
.report-card .big-number {
    color: white;
}

.data-card p {
    margin-top: 10px;
    font-size: 1.25rem;
    font-weight: 800;
}

.modulos-table-container,
.table-shell {
    overflow-x: auto;
}

.modulos-table,
.aulas-table,
.info-table,
.schedule-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: rgba(248, 251, 255, 0.88);
    border: 1px solid var(--admin-line);
    border-radius: 18px;
    overflow: hidden;
}

.modulos-table th,
.modulos-table td,
.aulas-table th,
.aulas-table td,
.info-table td,
.schedule-table th,
.schedule-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--admin-line);
}

.modulos-table th,
.aulas-table th,
.schedule-table th {
    background: rgba(15, 122, 229, 0.08);
    color: var(--admin-text);
    font-weight: 800;
}

.modulos-table td,
.aulas-table td,
.info-table td,
.schedule-table td {
    color: var(--admin-muted);
}

.modulos-table tbody tr:hover,
.aulas-table tbody tr:hover,
.schedule-table tbody tr:hover {
    background: rgba(15, 122, 229, 0.04);
}

.modulos-table tbody tr:last-child td,
.aulas-table tbody tr:last-child td,
.info-table tr:last-child td,
.schedule-table tbody tr:last-child td {
    border-bottom: 0;
}

.status-ok {
    color: var(--admin-accent);
    font-weight: 800;
}

.btn-admin,
.btn-small,
.btn-secondary,
.btn-logout {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0.7rem 1rem;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 800;
    border: 0;
    transition: transform 0.24s ease, box-shadow 0.24s ease, background-color 0.24s ease;
    cursor: pointer;
}

.btn-admin:hover,
.btn-small:hover,
.btn-secondary:hover,
.btn-logout:hover {
    transform: translateY(-2px);
}

.btn-edit,
.btn-small {
    background: linear-gradient(135deg, var(--admin-brand), var(--admin-brand-deep));
    color: white;
    box-shadow: 0 14px 28px rgba(15, 122, 229, 0.18);
}

.btn-view,
.btn-secondary {
    background: rgba(16, 33, 58, 0.08);
    color: var(--admin-text);
    border: 1px solid rgba(16, 33, 58, 0.08);
}

.btn-logout {
    background: linear-gradient(135deg, var(--admin-danger), #dc2626);
    color: white;
    box-shadow: 0 14px 28px rgba(239, 68, 68, 0.18);
}

.btn-admin + .btn-admin,
.btn-secondary + .btn-secondary {
    margin-left: 6px;
}

.stat-box {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(248, 251, 255, 0.92));
    border: 1px solid var(--admin-line);
    padding: 22px;
    text-align: center;
}

.stat-value {
    font-size: clamp(2rem, 3vw, 2.7rem);
    margin: 10px 0 6px;
}

.stat-sub {
    font-size: 0.88rem;
}

.acao-card {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid var(--admin-line);
    padding: 22px 16px;
    text-align: center;
    text-decoration: none;
    color: inherit;
}

.acao-text {
    display: block;
    margin-top: 10px;
    font-weight: 800;
    color: var(--admin-text);
}

.info-list {
    display: grid;
    gap: 12px;
}

.info-row {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 18px;
    padding: 14px 16px;
    background: rgba(248, 251, 255, 0.92);
    border: 1px solid var(--admin-line);
}

.info-label {
    font-weight: 800;
    color: var(--admin-text);
}

.info-value {
    color: var(--admin-brand);
    font-weight: 700;
}

.detail-box,
.settings-group {
    background: rgba(248, 251, 255, 0.92);
    border: 1px solid var(--admin-line);
    padding: 18px;
}

.detail-box label,
.settings-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 800;
    color: var(--admin-brand);
}

.detail-box p,
.setting-value {
    margin: 0;
    color: var(--admin-text);
    line-height: 1.55;
}

.setting-value {
    background: white;
    border: 1px solid var(--admin-line);
    border-radius: 12px;
    padding: 12px 14px;
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    word-break: break-word;
}

.instructions {
    background: rgba(15, 122, 229, 0.06);
    border: 1px solid rgba(15, 122, 229, 0.1);
    padding: 18px;
}

.instructions h3 {
    margin: 0 0 10px;
    color: var(--admin-text);
}

.instructions ol {
    margin: 10px 0 0 20px;
}

.instructions li + li {
    margin-top: 8px;
}

code {
    background: rgba(15, 122, 229, 0.08);
    color: var(--admin-brand-deep);
    padding: 0.15rem 0.4rem;
    border-radius: 8px;
    font-family: 'JetBrains Mono', 'Courier New', monospace;
}

.alert {
    padding: 16px 18px;
    border-radius: var(--admin-radius-md);
    border: 1px solid transparent;
}

.alert-info {
    background: rgba(15, 122, 229, 0.08);
    border-color: rgba(15, 122, 229, 0.14);
    color: var(--admin-text);
}

.action-buttons {
    margin-top: 22px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 32px;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 800;
}

.badge-info {
    background: rgba(245, 158, 11, 0.12);
    color: #b45309;
}

@media (max-width: 980px) {
    .admin-sidebar {
        position: static;
        width: 100%;
        min-height: auto;
    }

    body.admin-page {
        display: block;
    }

    .admin-main {
        margin-left: 0;
        width: 100%;
    }
}

@media (max-width: 768px) {
    .admin-main {
        padding: 16px;
    }

    .admin-header {
        padding: 18px;
        flex-direction: column;
        align-items: flex-start;
    }

    .summary-grid,
    .datas-grid,
    .stats-grid,
    .report-cards,
    .acoes-grid,
    .module-details,
    .aula-details {
        grid-template-columns: 1fr;
    }

    .info-row {
        grid-template-columns: 1fr;
        gap: 6px;
    }

    .btn-admin,
    .btn-small,
    .btn-secondary,
    .btn-logout {
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .summary-card,
    .acao-card,
    .report-card,
    .detail-box,
    .data-card,
    .stat-box,
    .btn-admin,
    .btn-small,
    .btn-secondary,
    .btn-logout,
    .sidebar-nav a {
        transition: none;
    }
}