/* ============================================================
   MD902 HEMS Performance Calculator — Shared Stylesheet
   ============================================================ */

/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; }

body {
    font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
    background: #0f172a;
    color: #e2e8f0;
    min-height: 100vh;
    line-height: 1.5;
}

a { color: #60a5fa; text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Layout ───────────────────────────────────────────────── */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1rem 3rem;
}

.container-wide {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1rem 3rem;
}

/* ── Header ───────────────────────────────────────────────── */
.app-header {
    background: linear-gradient(135deg, #1e3a5f 0%, #0f2847 100%);
    border-bottom: 2px solid #2563eb;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.app-header-left h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.01em;
}

.app-header-left .subtitle {
    font-size: 0.8rem;
    color: #93c5fd;
    margin-top: 0.1rem;
}

.app-header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* ── Cards ────────────────────────────────────────────────── */
.card {
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 10px;
    margin-top: 1rem;
    overflow: hidden;
}

.card-header {
    background: #1a3356;
    border-bottom: 1px solid #334155;
    padding: 0.65rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
}

.card-header h2 {
    font-size: 0.9rem;
    font-weight: 600;
    color: #93c5fd;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-header .header-badges {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    align-items: center;
}

.card-body {
    padding: 1rem;
}

.card-body.collapsed { display: none; }

/* ── Form Controls ────────────────────────────────────────── */
.form-row {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 140px;
}

.form-group label {
    font-size: 0.78rem;
    color: #94a3b8;
    margin-bottom: 0.3rem;
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group select {
    background: #0f172a;
    border: 1px solid #334155;
    border-radius: 6px;
    color: #e2e8f0;
    font-size: 0.9rem;
    padding: 0.45rem 0.65rem;
    width: 100%;
    transition: border-color 0.15s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #3b82f6;
}

.form-group input[type="range"] {
    width: 100%;
    accent-color: #3b82f6;
    cursor: pointer;
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.45rem 0.9rem;
    border: none;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, opacity 0.15s;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary   { background: #2563eb; color: #fff; }
.btn-primary:hover { background: #1d4ed8; }

.btn-success   { background: #16a34a; color: #fff; }
.btn-success:hover { background: #15803d; }

.btn-danger    { background: #dc2626; color: #fff; }
.btn-danger:hover { background: #b91c1c; }

.btn-warning   { background: #d97706; color: #fff; }
.btn-warning:hover { background: #b45309; }

.btn-secondary { background: #334155; color: #e2e8f0; }
.btn-secondary:hover { background: #475569; }

.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.78rem; }

.btn-quick {
    padding: 0.3rem 0.7rem;
    font-size: 0.8rem;
    background: #1e3a5f;
    border: 1px solid #2563eb;
    color: #93c5fd;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.15s;
}
.btn-quick:hover { background: #2563eb; color: #fff; }

.btn-pdf {
    background: linear-gradient(135deg, #dc2626, #991b1b);
    color: #fff;
    font-size: 1rem;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 700;
    letter-spacing: 0.03em;
    transition: opacity 0.15s;
    width: 100%;
    margin-top: 1rem;
}
.btn-pdf:hover { opacity: 0.9; }

/* ── Badges ───────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.2rem 0.55rem;
    border-radius: 99px;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.badge-blue   { background: #1e3a5f; color: #93c5fd; border: 1px solid #2563eb; }
.badge-green  { background: #14532d; color: #86efac; border: 1px solid #16a34a; }
.badge-yellow { background: #713f12; color: #fde047; border: 1px solid #ca8a04; }
.badge-red    { background: #7f1d1d; color: #fca5a5; border: 1px solid #dc2626; }
.badge-gray   { background: #1e293b; color: #94a3b8; border: 1px solid #475569; }
.badge-orange { background: #7c2d12; color: #fdba74; border: 1px solid #ea580c; }

/* ── Result Boxes (ok / warn / bad / na) ─────────────────── */
.result-box {
    border-radius: 8px;
    border: 2px solid;
    padding: 0.6rem 0.75rem;
    text-align: center;
    min-width: 130px;
    flex: 1;
}

.result-box .result-label {
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.8;
    display: block;
    margin-bottom: 0.2rem;
}

.result-box .result-value {
    font-size: 1.25rem;
    font-weight: 700;
    display: block;
}

.result-box .result-sub {
    font-size: 0.7rem;
    opacity: 0.75;
    display: block;
    margin-top: 0.1rem;
}

/* Status colour variants */
.result-ok {
    background: #052e16;
    border-color: #16a34a;
    color: #86efac;
}
.result-warn {
    background: #1c1200;
    border-color: #ca8a04;
    color: #fde047;
}
.result-bad {
    background: #450a0a;
    border-color: #dc2626;
    color: #fca5a5;
}
.result-na {
    background: #0f172a;
    border-color: #334155;
    color: #475569;
}

/* ── Result Row ───────────────────────────────────────────── */
.result-row {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 0.5rem;
}

/* ── Leg Block ────────────────────────────────────────────── */
.leg-block {
    border: 1px solid #334155;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 0.75rem;
}

.leg-block-header {
    background: #172033;
    padding: 0.5rem 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.82rem;
    font-weight: 600;
    color: #7dd3fc;
    border-bottom: 1px solid #334155;
}

.leg-block-body {
    padding: 0.6rem 0.75rem;
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

/* ── Weight Summary ───────────────────────────────────────── */
.wt-summary {
    background: #0f172a;
    border-radius: 8px;
    border: 1px solid #334155;
    padding: 0.75rem 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
}

.wt-row {
    display: flex;
    align-items: baseline;
    gap: 0.3rem;
    font-size: 0.88rem;
}

.wt-label { color: #94a3b8; }
.wt-value { font-weight: 700; font-size: 1rem; }

.wt-value.ok   { color: #86efac; }
.wt-value.warn { color: #fde047; }
.wt-value.bad  { color: #fca5a5; }
.wt-value.na   { color: #475569; }

/* ── Checkbox Grid ────────────────────────────────────────── */
.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.4rem;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    padding: 0.3rem 0.5rem;
    border-radius: 5px;
    background: #0f172a;
    border: 1px solid #1e293b;
}

.checkbox-item input[type="checkbox"] {
    accent-color: #3b82f6;
    width: 1rem;
    height: 1rem;
    cursor: pointer;
}

.checkbox-item label {
    cursor: pointer;
    flex: 1;
    color: #cbd5e1;
}

.checkbox-item .item-weight {
    font-size: 0.75rem;
    color: #64748b;
    font-weight: 600;
}

/* ── METAR display ────────────────────────────────────────── */
.metar-box {
    background: #0a1628;
    border: 1px solid #1e3a5f;
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    font-family: 'Courier New', monospace;
    font-size: 0.78rem;
    color: #7dd3fc;
    white-space: pre-wrap;
    word-break: break-all;
    min-height: 2rem;
    margin-top: 0.4rem;
}

.weather-section {
    border: 1px solid #1e3a5f;
    border-radius: 8px;
    padding: 0.75rem;
    margin-bottom: 0.75rem;
    background: #0f172a;
}

.weather-section h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #60a5fa;
    margin-bottom: 0.6rem;
}

/* ── Warnings ─────────────────────────────────────────────── */
.warnings-box {
    border: 1px solid #dc2626;
    border-radius: 6px;
    background: #450a0a;
    padding: 0.6rem 0.75rem;
    margin-top: 0.5rem;
}

.warnings-box ul {
    list-style: none;
    padding: 0;
}

.warnings-box ul li {
    font-size: 0.82rem;
    color: #fca5a5;
    padding: 0.15rem 0;
}

.warnings-box ul li::before {
    content: "⚠ ";
}

/* ── Loading spinner ──────────────────────────────────────── */
.loading {
    opacity: 0.5;
    pointer-events: none;
}

.spinner {
    display: inline-block;
    width: 1em;
    height: 1em;
    border: 2px solid #334155;
    border-top-color: #3b82f6;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    vertical-align: middle;
}

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

/* ── DA altitude badges ───────────────────────────────────── */
.alt-badges {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    margin-top: 0.4rem;
}

/* ── Admin Layout ─────────────────────────────────────────── */
.admin-nav {
    background: #1e293b;
    border-bottom: 1px solid #334155;
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.admin-nav .nav-brand {
    font-weight: 700;
    font-size: 0.9rem;
    color: #93c5fd;
    margin-right: 0.5rem;
}

.admin-nav a {
    color: #94a3b8;
    font-size: 0.85rem;
    padding: 0.3rem 0.6rem;
    border-radius: 5px;
    transition: background 0.15s, color 0.15s;
}

.admin-nav a:hover,
.admin-nav a.active {
    background: #1e3a5f;
    color: #e2e8f0;
    text-decoration: none;
}

.admin-nav .nav-spacer { flex: 1; }

.admin-nav .nav-user {
    font-size: 0.78rem;
    color: #64748b;
}

/* ── Admin Tables ─────────────────────────────────────────── */
.admin-content {
    max-width: 1100px;
    margin: 1.5rem auto;
    padding: 0 1rem 3rem;
}

.admin-section {
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 10px;
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.admin-section-header {
    background: #1a3356;
    border-bottom: 1px solid #334155;
    padding: 0.7rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.admin-section-header h2 {
    font-size: 0.95rem;
    font-weight: 600;
    color: #93c5fd;
}

.admin-section-body { padding: 1rem; }

table.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

table.data-table th {
    background: #0f172a;
    color: #64748b;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.5rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid #334155;
}

table.data-table td {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid #1e293b;
    color: #cbd5e1;
    vertical-align: middle;
}

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

table.data-table tr:hover td { background: #172033; }

/* ── Admin Forms ──────────────────────────────────────────── */
.admin-form {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: flex-end;
    background: #0f172a;
    border: 1px solid #1e3a5f;
    border-radius: 8px;
    padding: 0.75rem;
    margin-bottom: 1rem;
}

.admin-form .form-group {
    min-width: 110px;
    flex: 1;
}

.admin-form .form-group label {
    font-size: 0.75rem;
    color: #94a3b8;
    display: block;
    margin-bottom: 0.2rem;
}

.admin-form .form-group input,
.admin-form .form-group select {
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 5px;
    color: #e2e8f0;
    font-size: 0.85rem;
    padding: 0.4rem 0.6rem;
    width: 100%;
}

.admin-form .form-group input:focus,
.admin-form .form-group select:focus {
    outline: none;
    border-color: #3b82f6;
}

.form-inline-check {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.82rem;
    color: #94a3b8;
    padding-top: 1.4rem;
}

/* ── Alert boxes ──────────────────────────────────────────── */
.alert {
    padding: 0.65rem 1rem;
    border-radius: 6px;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.alert-success { background: #052e16; border: 1px solid #16a34a; color: #86efac; }
.alert-error   { background: #450a0a; border: 1px solid #dc2626; color: #fca5a5; }
.alert-info    { background: #0c1a3d; border: 1px solid #2563eb; color: #93c5fd; }

/* ── Stat cards (admin dashboard) ────────────────────────── */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: #0f172a;
    border: 1px solid #334155;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    text-align: center;
}

.stat-card .stat-num {
    font-size: 1.75rem;
    font-weight: 700;
    color: #60a5fa;
    display: block;
}

.stat-card .stat-label {
    font-size: 0.75rem;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 0.2rem;
}

/* ── Utility ──────────────────────────────────────────────── */
.text-muted  { color: #64748b; }
.text-sm     { font-size: 0.8rem; }
.text-right  { text-align: right; }
.mt-1        { margin-top: 0.5rem; }
.mt-2        { margin-top: 1rem; }
.mb-1        { margin-bottom: 0.5rem; }
.hidden      { display: none !important; }
.flex        { display: flex; }
.flex-wrap   { flex-wrap: wrap; }
.gap-sm      { gap: 0.4rem; }
.gap-md      { gap: 0.75rem; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 600px) {
    .app-header { padding: 0.75rem 1rem; }
    .app-header-left h1 { font-size: 1rem; }
    .card-body { padding: 0.75rem; }
    .form-row { gap: 0.5rem; }
    .result-box .result-value { font-size: 1rem; }
    .admin-nav { gap: 0.25rem; }
    table.data-table { display: block; overflow-x: auto; }
}