/* ── Flight Time / Block Time Calculator ──────────────────────────────────── */

.h2, h2 { font-size: 1.5rem !important; }

.section-label {
    color: var(--dt-amber, #d97706);
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.85rem;
}

.section-label .bt-optional {
    color: var(--dt-muted);
    font-weight: 400;
    text-transform: none;
    letter-spacing: 0;
    font-size: 0.75rem;
}

.bt-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--dt-text);
    margin-bottom: 0.3rem;
}

.bt-unit-lbl,
.bt-optional { color: var(--dt-muted); font-weight: 400; }

.bt-icao {
    font-family: 'Ubuntu Sans Mono', monospace;
    font-weight: 700;
    letter-spacing: 0.05em;
}

#ftime-form .form-control::placeholder {
    color: #d3dae4;
    opacity: 1; /* Firefox dims placeholders by default */
    font-weight: 400;
}

[data-theme="dark"] #ftime-form .form-control::placeholder {
    color: #3a4659;
}

.bt-time {
    font-family: 'Ubuntu Sans Mono', monospace;
    font-weight: 700;
}

/* ── Segmented controls ───────────────────────────────────────────────────── */

.bt-segmented {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.bt-segmented--full .bt-seg-btn { flex: 1 1 0; }

.bt-seg-btn {
    flex: 1 1 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.1rem;
    padding: 0.5rem 0.4rem;
    border: 1px solid var(--dt-border);
    border-radius: 8px;
    background: var(--dt-surface);
    color: var(--dt-text);
    font-size: 0.85rem;
    font-weight: 700;
    line-height: 1.1;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s, color 0.15s;
}

.bt-seg-btn:hover { border-color: var(--dt-blue); }

.bt-seg-btn.active {
    background: var(--dt-blue);
    border-color: var(--dt-blue);
    color: #fff;
}

.bt-seg-sub {
    font-size: 0.68rem;
    font-weight: 400;
    opacity: 0.8;
    text-transform: none;
    letter-spacing: 0;
}

/* ── Loading / spinner ────────────────────────────────────────────────────── */

.bt-loading {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    color: var(--dt-muted);
    padding: 1rem 0;
}

.bt-spinner {
    width: 1.25rem;
    height: 1.25rem;
    border: 3px solid var(--dt-border);
    border-top-color: var(--dt-blue);
    border-radius: 50%;
    animation: bt-spin 0.7s linear infinite;
}

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

/* ── Route header ─────────────────────────────────────────────────────────── */

.bt-route-head {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    font-family: 'Ubuntu Sans Mono', monospace;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--dt-text);
}

.bt-route-plane { color: var(--dt-blue); font-size: 1.1rem; }

.bt-route-names {
    color: var(--dt-muted);
    font-size: 0.85rem;
    margin-top: 0.15rem;
    margin-bottom: 1rem;
}

/* ── Stat grid ────────────────────────────────────────────────────────────── */

.bt-stat-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.85rem;
}

.bt-stat { padding: 0.9rem 1rem; }

.bt-stat-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--dt-muted);
}

.bt-stat-val {
    font-size: 1.9rem;
    font-weight: 700;
    line-height: 1.1;
    color: var(--dt-text);
    margin-top: 0.2rem;
}

.bt-stat-unit {
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--dt-muted);
    margin-left: 0.25rem;
}

.bt-stat-sub {
    font-size: 0.78rem;
    color: var(--dt-muted);
    margin-top: 0.2rem;
}

.bt-stat--accent { border-left: 3px solid var(--dt-amber); }
.bt-stat--primary { border-left: 3px solid var(--dt-blue); }
.bt-stat--primary .bt-stat-val { color: var(--dt-blue); }

/* ── Route map ────────────────────────────────────────────────────────────── */

.bt-map-card {
    padding: 0;
    overflow: hidden;
}

#bt-map {
    height: 360px;
    width: 100%;
    border-radius: 8px;
    background: #0d1b2a;
}

.bt-map-label {
    background: var(--dt-navy);
    color: #fff;
    border: none;
    border-radius: 4px;
    font-family: 'Ubuntu Sans Mono', monospace;
    font-weight: 700;
    font-size: 0.72rem;
    padding: 1px 5px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.bt-map-label::before { display: none; }

/* ── Schedule output ──────────────────────────────────────────────────────── */

.bt-sched-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.85rem;
}

.bt-sched { padding: 0.85rem 1rem; }

.bt-sched-head {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--dt-muted);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.bt-sched-head i { color: var(--dt-blue); }

.bt-sched-ep {
    margin-left: auto;
    font-family: 'Ubuntu Sans Mono', monospace;
    color: var(--dt-text);
}

.bt-sched-z {
    font-family: 'Ubuntu Sans Mono', monospace;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--dt-text);
    margin-top: 0.4rem;
}

.bt-sched-local {
    font-size: 0.82rem;
    color: var(--dt-muted);
    margin-top: 0.15rem;
}

/* ── Disclaimer ───────────────────────────────────────────────────────────── */

.bt-disclaimer {
    font-size: 0.78rem;
    color: var(--dt-muted);
    margin-top: 1.1rem;
    margin-bottom: 0;
}

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

@media (max-width: 575.98px) {
    .bt-stat-grid,
    .bt-sched-grid { grid-template-columns: 1fr; }
    .bt-route-head { font-size: 1.35rem; }
}