/* Shared styles for the app pages (login, register, dashboard, attendance,
   files, admin panel) — kept visually consistent with the main site
   (index.html) using the same color tokens and font. */

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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #10b981;
    --dark: #1f2937;
    --light: #f9fafb;
    --gray: #6b7280;
    --border: #e5e7eb;
    --danger: #dc2626;
    --danger-bg: #fef2f2;
    --success: #16a34a;
    --success-bg: #f0fdf4;
    --white: #ffffff;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--light);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ── Top bar ── */
.app-topbar {
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
}

.app-topbar .container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.app-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 1.15rem;
    color: var(--dark);
}

.app-brand i {
    color: var(--primary);
}

.app-brand .highlight {
    color: var(--primary);
    font-weight: normal;
    font-size: 0.85rem;
}

.app-nav {
    display: flex;
    align-items: center;
    gap: 20px;
    list-style: none;
    flex-wrap: wrap;
}

.app-nav a {
    color: var(--gray);
    font-weight: 500;
    font-size: 0.95rem;
}

.app-nav a:hover {
    color: var(--primary);
    text-decoration: none;
}

.app-nav .app-user {
    color: var(--dark);
    font-weight: 500;
}

.app-nav .app-logout {
    padding: 8px 16px;
    border-radius: 5px;
    background: var(--light);
    border: 1px solid var(--border);
    color: var(--dark);
}

.app-nav .app-logout:hover {
    background: var(--danger-bg);
    border-color: var(--danger);
    color: var(--danger);
    text-decoration: none;
}

/* ── Page shell ── */
.app-main {
    flex: 1;
    padding: 50px 20px;
}

.app-container {
    max-width: 1100px;
    margin: 0 auto;
}

.app-container.narrow {
    max-width: 440px;
}

/* ── Card ── */
.app-card {
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.04);
    padding: 36px;
    margin-bottom: 24px;
}

.app-card h2 {
    font-size: 1.5rem;
    margin-bottom: 6px;
}

.app-card .app-subtitle {
    color: var(--gray);
    font-size: 0.95rem;
    margin-bottom: 24px;
}

/* ── Auth card icon ── */
.app-icon-badge {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin: 0 auto 18px;
}

.app-card.auth-card {
    text-align: center;
}

.app-card.auth-card form {
    text-align: left;
}

/* ── Forms ── */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 6px;
    color: var(--dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--dark);
    background: var(--white);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* ── Buttons ── */
.btn {
    display: inline-block;
    padding: 12px 26px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    font-family: inherit;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-block {
    display: block;
    width: 100%;
    text-align: center;
}

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--border);
    color: var(--dark);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* ── Alerts ── */
.alert {
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.alert-error {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid rgba(220, 38, 38, 0.2);
}

.alert-success {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid rgba(22, 163, 74, 0.2);
}

/* ── Links row under auth cards ── */
.auth-links {
    margin-top: 20px;
    font-size: 0.9rem;
    color: var(--gray);
    display: flex;
    justify-content: space-between;
}

/* ── Dashboard grid ── */
.app-welcome {
    margin-bottom: 28px;
}

.app-welcome h2 {
    font-size: 1.7rem;
    margin-bottom: 4px;
}

.app-welcome .role-badge {
    display: inline-block;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
    text-transform: capitalize;
}

/* ── Tabs ── */
.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}

.tab-link {
    padding: 10px 18px;
    font-weight: 600;
    font-size: 0.92rem;
    color: var(--gray);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}

.tab-link:hover {
    text-decoration: none;
    color: var(--primary);
}

.tab-link.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tile-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.tile {
    background: var(--white);
    border-radius: 12px;
    padding: 26px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.04);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: block;
}

.tile:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.08), 0 12px 28px rgba(0,0,0,0.08);
    text-decoration: none;
}

.tile i {
    font-size: 1.6rem;
    color: var(--primary);
    margin-bottom: 12px;
    display: block;
}

.tile h3 {
    font-size: 1.05rem;
    color: var(--dark);
    margin-bottom: 4px;
}

.tile p {
    font-size: 0.85rem;
    color: var(--gray);
}

.tile.tile-danger i {
    color: var(--danger);
}

/* ── Lists (files, attendance) ── */
.app-list {
    list-style: none;
}

.app-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 10px;
}

.app-list li .item-name {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
    overflow-wrap: anywhere;
}

.app-list li .item-name i {
    color: var(--primary);
}

.app-list li a.item-action {
    flex-shrink: 0;
    font-weight: 600;
    font-size: 0.85rem;
}

.app-empty {
    color: var(--gray);
    font-size: 0.95rem;
    padding: 20px 0;
}

/* ── Tables (admin) ── */
.app-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

.app-table th,
.app-table td {
    text-align: left;
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
}

.app-table th {
    color: var(--gray);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

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

.role-pill {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: capitalize;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
}

.role-pill.admin {
    background: rgba(220, 38, 38, 0.1);
    color: var(--danger);
}

.role-pill.status-live {
    background: rgba(22, 163, 74, 0.12);
    color: var(--success);
}

.role-pill.status-coming_soon {
    background: rgba(245, 158, 11, 0.12);
    color: #b45309;
}

.role-pill.status-ended {
    background: rgba(107, 114, 128, 0.15);
    color: var(--gray);
}

/* ── Lab credentials box ── */
.lab-card {
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.04);
    padding: 24px;
    margin-bottom: 20px;
}

.lab-card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.lab-card-head h3 {
    font-size: 1.1rem;
}

.lab-creds {
    background: var(--light);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px 16px;
    margin-top: 12px;
    font-family: 'SFMono-Regular', Consolas, monospace;
    font-size: 0.88rem;
}

.lab-creds div {
    margin-bottom: 4px;
}

.lab-creds div:last-child {
    margin-bottom: 0;
}

.lab-creds .label {
    font-family: 'Poppins', sans-serif;
    color: var(--gray);
    font-weight: 500;
    margin-right: 6px;
}

/* ── Section heading with back link ── */
.app-page-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
}

.app-page-head h2 {
    font-size: 1.5rem;
}

.back-link {
    font-size: 0.9rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* ── Footer ── */
.app-footer {
    text-align: center;
    padding: 20px;
    font-size: 0.82rem;
    color: var(--gray);
}

@media (max-width: 600px) {
    .app-card {
        padding: 26px 20px;
    }

    .app-topbar .container {
        flex-direction: column;
        gap: 12px;
    }

    .app-nav {
        justify-content: center;
    }
}