/* ═══════════════════════════════════════════════════════════════════
   Aircraft Maintenance Tracker — Web Stylesheet
   www.rms-aero.com
   ═══════════════════════════════════════════════════════════════════ */

:root {
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --danger: #d32f2f;
    --warning: #f9a825;
    --success: #2e7d32;
    --info: #0277bd;
    --bg: #f5f7fa;
    --bg-card: #ffffff;
    --text: #1a1a2e;
    --text-muted: #6b7280;
    --border: #e0e0e0;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.12);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── Navigation ─────────────────────────────────────────────────── */

.top-nav {
    background: var(--text);
    color: #fff;
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    height: 56px;
    gap: 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-lg);
}

.nav-brand a {
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
}

.nav-links {
    display: flex;
    gap: 1rem;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius);
    transition: background 0.2s;
}

.nav-links a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.nav-user {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.9rem;
}

.nav-user span {
    color: rgba(255, 255, 255, 0.7);
}

.nav-user a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
}

/* ── Container ──────────────────────────────────────────────────── */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    flex: 1;
}

/* ── Buttons ────────────────────────────────────────────────────── */

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-card);
    color: var(--text);
    text-decoration: none;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s;
    line-height: 1.4;
}

.btn:hover {
    box-shadow: var(--shadow);
}

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

.btn-primary:hover {
    background: var(--primary-dark);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
}

.btn-sm {
    padding: 0.25rem 0.625rem;
    font-size: 0.8rem;
}

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

/* ── Cards ──────────────────────────────────────────────────────── */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.card-header h2 {
    font-size: 1.25rem;
    margin: 0;
}

.card-body {
    margin-bottom: 1rem;
}

.card-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* ── Dashboard grid ─────────────────────────────────────────────── */

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 1.5rem;
}

.aircraft-card .status-row {
    display: flex;
    justify-content: space-between;
    padding: 0.4rem 0;
    border-bottom: 1px solid #f0f0f0;
}

.status-row .label {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.status-row .value {
    font-weight: 600;
}

/* ── Detail grid ────────────────────────────────────────────────── */

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.detail-grid dl {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.25rem 1rem;
}

.detail-grid dt {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.detail-grid dd {
    font-weight: 500;
}

/* ── Tables ─────────────────────────────────────────────────────── */

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.data-table th,
.data-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    background: #f8f9fa;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--text-muted);
}

.data-table tbody tr:hover {
    background: #f8f9fb;
}

/* ── Badges ─────────────────────────────────────────────────────── */

.badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    background: #e8eaf6;
    color: #3949ab;
}

.badge-oil_change { background: #fff3e0; color: #e65100; }
.badge-annual { background: #e8f5e9; color: #2e7d32; }
.badge-transponder_check { background: #e3f2fd; color: #1565c0; }
.badge-elt_check { background: #fce4ec; color: #c62828; }

/* ── Alerts ─────────────────────────────────────────────────────── */

.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: 0.9rem;
    border-left: 4px solid;
}

.alert-success { background: #e8f5e9; border-color: var(--success); color: #1b5e20; }
.alert-danger  { background: #ffebee; border-color: var(--danger);  color: #b71c1c; }
.alert-warning { background: #fff8e1; border-color: var(--warning); color: #f57f17; }
.alert-info    { background: #e3f2fd; border-color: var(--info);    color: #01579b; }

/* ── Forms ──────────────────────────────────────────────────────── */

.form-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    max-width: 720px;
    box-shadow: var(--shadow);
}

fieldset {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin-bottom: 1.25rem;
}

legend {
    font-weight: 600;
    padding: 0 0.5rem;
    font-size: 0.95rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.25rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

.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(26, 115, 232, 0.15);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

/* ── Auth ────────────────────────────────────────────────────────── */

.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
}

.auth-card h1 {
    text-align: center;
    margin-bottom: 0.25rem;
}

.auth-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.auth-link {
    text-align: center;
    margin-top: 1rem;
    font-size: 0.9rem;
}

/* ── Logbook ────────────────────────────────────────────────────── */

.logbook-entries {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.logbook-entry .logbook-meta {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: 0.75rem;
}

.logbook-date {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.logbook-hours {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.logbook-text {
    background: #f8f9fa;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    border-left: 3px solid var(--primary);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* ── Page header ────────────────────────────────────────────────── */

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.page-header h1 {
    margin: 0;
}

/* ── Empty state ────────────────────────────────────────────────── */

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}

.empty-state p {
    margin-bottom: 1rem;
}

/* ── Utility ────────────────────────────────────────────────────── */

.text-warning { color: var(--warning) !important; }
.text-danger  { color: var(--danger) !important; }
.text-success { color: var(--success) !important; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }

/* ── Footer ─────────────────────────────────────────────────────── */

.site-footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

/* ── Responsive ─────────────────────────────────────────────────── */

@media (max-width: 768px) {
    .top-nav {
        padding: 0 1rem;
        gap: 1rem;
        font-size: 0.9rem;
    }

    .nav-links {
        display: none;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

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

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
}