:root {
    --fb-bg: oklch(0.145 0.006 70);
    --fb-bg-raised: oklch(0.175 0.007 70);
    --fb-bg-card: oklch(0.185 0.007 70);
    --fb-bg-card-head: oklch(0.205 0.008 70);
    --fb-bg-inset: oklch(0.165 0.007 70);
    --fb-bg-sunken: oklch(0.155 0.006 70);
    --fb-bg-input: oklch(0.135 0.006 70);
    --fb-bg-chip: oklch(0.19 0.007 70);
    --fb-bg-btn: oklch(0.24 0.008 70);
    --fb-bg-btn-hover: oklch(0.30 0.010 70);
    --fb-line: oklch(0.30 0.008 70);
    --fb-line-soft: oklch(0.26 0.008 70);
    --fb-line-card: oklch(0.28 0.008 70);
    --fb-line-strong: oklch(0.36 0.008 70);
    --fb-line-faint: oklch(0.235 0.008 70);
    --fb-text: oklch(0.90 0.012 80);
    --fb-text-bright: oklch(0.93 0.012 80);
    --fb-text-body: oklch(0.87 0.012 80);
    --fb-text-soft: oklch(0.84 0.012 80);
    --fb-dim: oklch(0.55 0.010 80);
    --fb-dim-bright: oklch(0.62 0.010 80);
    --fb-amber: oklch(0.76 0.13 72);
    --fb-amber-bright: oklch(0.86 0.13 72);
    --fb-warn: oklch(0.72 0.14 34);
    --fb-error-bg: oklch(0.20 0.02 32);
    --fb-error-line: oklch(0.42 0.08 32);
    --fb-error-text: oklch(0.80 0.10 40);
    --fb-sans: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
    --fb-mono: 'IBM Plex Mono', ui-monospace, monospace;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    background: var(--fb-bg);
}

body {
    min-height: 100vh;
    color: var(--fb-text-body);
    font-family: var(--fb-sans);
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    color: var(--fb-amber-bright);
}

::selection {
    background: oklch(0.76 0.13 72 / 0.3);
}

.fb-shell {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.fb-mono {
    font-family: var(--fb-mono);
}

.fb-spacer {
    flex: 1;
}

.fb-top {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    flex-direction: column;
    background: var(--fb-bg-raised);
    border-bottom: 1px solid var(--fb-line);
}

.fb-top__row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 24px;
    padding: 14px 22px;
}

.fb-brand {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 190px;
}

.fb-brand__name {
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 0.14em;
    color: var(--fb-amber);
}

.fb-brand__duty {
    font-family: var(--fb-mono);
    font-size: 12px;
    letter-spacing: 0.06em;
    color: var(--fb-dim-bright);
}

.fb-search {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    flex: 1;
    min-width: 260px;
    max-width: 560px;
    margin: 0;
}

.fb-search__field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}

.fb-search__hint {
    font-family: var(--fb-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    color: var(--fb-dim-bright);
}

.fb-input {
    width: 100%;
    height: 46px;
    padding: 0 14px;
    background: var(--fb-bg-input);
    border: 1px solid oklch(0.32 0.008 70);
    border-radius: 4px;
    color: var(--fb-text);
    font-family: var(--fb-mono);
    font-size: 15px;
    letter-spacing: 0.04em;
    outline: none;
}

.fb-input::placeholder {
    color: oklch(0.50 0.010 80);
}

.fb-input:focus {
    border-color: var(--fb-amber);
}

.fb-field-error {
    font-family: var(--fb-mono);
    font-size: 12px;
    letter-spacing: 0.04em;
    color: var(--fb-error-text);
}

.fb-field-error:empty {
    display: none;
}

.fb-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    white-space: nowrap;
    height: 46px;
    padding: 0 18px;
    background: var(--fb-bg-btn);
    border: 1px solid var(--fb-line-strong);
    border-radius: 4px;
    color: var(--fb-text-body);
    font-family: var(--fb-sans);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.10em;
    cursor: pointer;
}

.fb-btn:hover {
    background: var(--fb-bg-btn-hover);
    color: var(--fb-text-body);
}

.fb-btn--primary {
    background: var(--fb-amber);
    border: none;
    color: oklch(0.16 0.02 72);
    font-weight: 700;
    padding: 0 20px;
}

.fb-btn--primary:hover {
    background: var(--fb-amber-bright);
    color: oklch(0.16 0.02 72);
}

.fb-btn--small {
    height: 44px;
    min-width: 44px;
    padding: 0 16px;
    border-radius: 3px;
    font-size: 12px;
    color: var(--fb-text-soft);
}

.fb-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}

.fb-meta__stack {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
    white-space: nowrap;
}

.fb-meta__label {
    font-family: var(--fb-mono);
    font-size: 11px;
    letter-spacing: 0.10em;
    color: var(--fb-dim);
}

.fb-meta__value {
    font-family: var(--fb-mono);
    font-size: 13px;
    letter-spacing: 0.04em;
    color: var(--fb-dim);
}

.fb-tabs {
    display: flex;
    align-items: stretch;
    padding: 0 22px;
}

.fb-tab {
    height: 46px;
    padding: 0 20px;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--fb-dim);
    font-family: var(--fb-sans);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.12em;
    cursor: pointer;
}

.fb-tab.is-active {
    border-bottom-color: var(--fb-amber);
    color: var(--fb-text);
}

.fb-tab:disabled {
    cursor: not-allowed;
    color: oklch(0.42 0.008 80);
}

.fb-legs-block {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 18px 22px 6px;
}

.fb-section-label {
    font-family: var(--fb-mono);
    font-size: 11px;
    letter-spacing: 0.16em;
    color: var(--fb-dim);
}

.fb-legs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.fb-leg {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    background: var(--fb-bg-chip);
    border: 1px solid var(--fb-line-card);
    border-left: 3px solid var(--fb-amber);
    border-radius: 3px;
}

.fb-leg__flight {
    font-family: var(--fb-mono);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--fb-amber);
}

.fb-leg__body {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.fb-leg__route {
    font-family: var(--fb-mono);
    font-size: 15px;
    letter-spacing: 0.06em;
    color: var(--fb-text);
}

.fb-leg__name {
    font-size: 12px;
    letter-spacing: 0.02em;
    color: oklch(0.58 0.010 80);
}

.fb-notice {
    margin: 14px 22px 0;
    padding: 14px 18px;
    border-radius: 3px;
    font-family: var(--fb-mono);
    font-size: 14px;
    line-height: 1.6;
    letter-spacing: 0.04em;
    background: var(--fb-bg-chip);
    border: 1px solid var(--fb-line-card);
    color: var(--fb-text-soft);
}

.fb-notice--error {
    background: var(--fb-error-bg);
    border-color: var(--fb-error-line);
    color: var(--fb-error-text);
}

.fb-notice--warn {
    background: oklch(0.20 0.020 72);
    border-color: oklch(0.42 0.070 72);
    color: oklch(0.84 0.100 72);
}

.fb-landing {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 40px 22px;
    padding: 26px 24px;
    background: var(--fb-bg-card);
    border: 1px solid var(--fb-line-card);
    border-radius: 4px;
    max-width: 620px;
}

.fb-landing__title {
    font-family: var(--fb-mono);
    font-size: 15px;
    letter-spacing: 0.14em;
    color: var(--fb-amber);
}

.fb-landing__body {
    font-size: 14px;
    line-height: 1.7;
    color: oklch(0.70 0.012 80);
}

.fb-cards {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 18px 22px 60px;
}

.fb-card {
    background: var(--fb-bg-card);
    border: 1px solid var(--fb-line-card);
    border-radius: 4px;
    overflow: hidden;
}

.fb-card__head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 20px;
    padding: 16px 20px;
    background: var(--fb-bg-card-head);
    border-bottom: 1px solid var(--fb-line-card);
}

.fb-card__ident {
    display: flex;
    align-items: baseline;
    gap: 10px;
}

.fb-card__icao {
    font-family: var(--fb-mono);
    font-size: 30px;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: oklch(0.92 0.012 80);
}

.fb-card__iata {
    font-family: var(--fb-mono);
    font-size: 18px;
    letter-spacing: 0.10em;
    color: var(--fb-dim-bright);
}

.fb-card__titles {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.fb-card__name {
    font-size: 15px;
    font-weight: 500;
    color: var(--fb-text-soft);
}

.fb-card__badge {
    font-family: var(--fb-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    color: oklch(0.56 0.010 80);
}

.fb-card__age {
    font-family: var(--fb-mono);
    font-size: 12px;
    letter-spacing: 0.06em;
    color: var(--fb-dim);
}

.is-stale {
    color: var(--fb-warn);
}

.fb-card__tabs {
    display: flex;
    padding: 0 20px;
    background: var(--fb-bg-inset);
    border-bottom: 1px solid var(--fb-line-soft);
}

.fb-cardtab {
    height: 48px;
    padding: 0 22px;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--fb-dim);
    font-family: var(--fb-mono);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.14em;
    cursor: pointer;
}

.fb-cardtab.is-active {
    border-bottom-color: var(--fb-amber);
    color: var(--fb-text);
}

.fb-pane[hidden] {
    display: none;
}

.fb-panel {
    padding: 20px 20px 18px;
}

.fb-panel__label {
    margin-bottom: 10px;
    font-family: var(--fb-mono);
    font-size: 11px;
    letter-spacing: 0.16em;
    color: var(--fb-amber);
}

.fb-raw {
    margin: 0;
    font-family: var(--fb-mono);
    font-size: 21px;
    line-height: 1.5;
    letter-spacing: 0.02em;
    color: var(--fb-text-bright);
    white-space: pre-wrap;
    word-break: break-word;
}

.fb-raw--taf {
    font-size: 19px;
    line-height: 1.65;
}

.fb-raw--archive {
    font-size: 16px;
    line-height: 1.55;
    color: oklch(0.78 0.012 80);
}

.fb-raw--notam {
    font-size: 15px;
    line-height: 1.7;
    color: oklch(0.88 0.012 80);
}

.fb-empty {
    margin: 0;
    font-family: var(--fb-mono);
    font-size: 14px;
    letter-spacing: 0.04em;
    color: var(--fb-dim);
}

.fb-archive-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    height: 46px;
    padding: 0 20px;
    background: var(--fb-bg-inset);
    border: none;
    border-top: 1px solid var(--fb-line-soft);
    color: oklch(0.68 0.010 80);
    font-family: var(--fb-mono);
    font-size: 12px;
    letter-spacing: 0.12em;
    text-align: left;
    cursor: pointer;
}

.fb-archive-toggle:hover {
    color: oklch(0.88 0.012 80);
}

.fb-archive {
    display: flex;
    flex-direction: column;
    padding: 4px 20px 18px;
    background: var(--fb-bg-inset);
}

.fb-archive[hidden] {
    display: none;
}

.fb-archive__row {
    display: flex;
    gap: 16px;
    padding: 12px 0;
    border-bottom: 1px solid var(--fb-line-faint);
}

.fb-archive__age {
    min-width: 66px;
    padding-top: 3px;
    font-family: var(--fb-mono);
    font-size: 12px;
    letter-spacing: 0.06em;
    color: oklch(0.54 0.010 80);
}

.fb-notams {
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding: 20px;
}

.fb-notam {
    padding: 16px 18px;
    background: var(--fb-bg-sunken);
    border: 1px solid var(--fb-line-soft);
    border-radius: 3px;
}

.fb-card__unavailable {
    margin: 20px;
    padding: 14px 18px;
    background: var(--fb-error-bg);
    border: 1px solid var(--fb-error-line);
    border-radius: 3px;
    font-family: var(--fb-mono);
    font-size: 14px;
    line-height: 1.6;
    letter-spacing: 0.02em;
    color: var(--fb-error-text);
}

.fb-sigwx {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 18px 22px 0;
}

.fb-sigwx__head {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.fb-sigwx__stamp {
    font-family: var(--fb-mono);
    font-size: 13px;
    letter-spacing: 0.06em;
    color: var(--fb-amber);
}

.fb-sigwx__frame {
    align-self: flex-start;
    width: 100%;
    max-width: 1000px;
    padding: 10px;
    background: var(--fb-bg-card);
    border: 1px solid var(--fb-line-card);
    border-radius: 4px;
    overflow: auto;
}

.fb-sigwx__chart {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 2px;
}

.fb-sigwx .fb-foot {
    padding: 2px 0 40px;
}

.fb-splash {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 44px;
    min-height: 100vh;
    padding: 60px 32px;
}

.fb-splash__brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}

.fb-splash__name {
    font-size: 34px;
    font-weight: 700;
    letter-spacing: 0.22em;
    color: var(--fb-amber);
}

.fb-splash__tagline {
    font-family: var(--fb-mono);
    font-size: 14px;
    letter-spacing: 0.14em;
    text-align: center;
    color: var(--fb-dim-bright);
}

.fb-splash__duty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 22px 40px;
    background: var(--fb-bg-card);
    border: 1px solid var(--fb-line-card);
    border-radius: 4px;
}

.fb-splash__date {
    font-family: var(--fb-mono);
    font-size: 12px;
    letter-spacing: 0.16em;
    color: var(--fb-dim);
}

.fb-splash__route {
    font-family: var(--fb-mono);
    font-size: 18px;
    letter-spacing: 0.08em;
    text-align: center;
    word-break: break-all;
    color: var(--fb-text-bright);
}

.fb-splash__crew {
    font-family: var(--fb-mono);
    font-size: 12px;
    letter-spacing: 0.10em;
    text-align: center;
    color: var(--fb-dim-bright);
}

.fb-splash__foot {
    font-family: var(--fb-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    color: oklch(0.45 0.010 80);
}

.fb-btn--hero {
    height: 68px;
    padding: 0 52px;
    font-size: 17px;
    letter-spacing: 0.16em;
}

.fb-foot {
    padding: 0 22px 40px;
    font-family: var(--fb-mono);
    font-size: 11px;
    line-height: 1.8;
    letter-spacing: 0.08em;
    color: oklch(0.48 0.010 80);
}

@media (max-width: 720px) {
    .fb-top__row {
        gap: 14px;
    }

    .fb-meta {
        width: 100%;
        justify-content: space-between;
    }

    .fb-card__icao {
        font-size: 24px;
    }

    .fb-raw {
        font-size: 17px;
    }

    .fb-raw--taf {
        font-size: 16px;
    }

    .fb-cardtab {
        padding: 0 14px;
        letter-spacing: 0.08em;
    }

    .fb-splash {
        gap: 34px;
        padding: 44px 22px;
    }

    .fb-splash__name {
        font-size: 26px;
        letter-spacing: 0.16em;
    }

    .fb-splash__tagline {
        font-size: 12px;
        letter-spacing: 0.10em;
    }

    .fb-splash__duty {
        width: 100%;
        padding: 20px 22px;
    }

    .fb-splash__route {
        font-size: 15px;
    }

    .fb-btn--hero {
        width: 100%;
        padding: 0 24px;
        font-size: 15px;
    }
}