:root {
    color-scheme: light;
    --ink: #14231e;
    --paper: #f4f1e9;
    --panel: #fffdf7;
    --line: #c9d0c7;
    --green: #164f3c;
    --mint: #baf5d0;
    --coral: #ff6b4a;
    --muted: #66746d;
    --shadow: 0 24px 70px rgba(20, 35, 30, .09);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-width: 320px;
    background:
            radial-gradient(circle at 85% 8%, rgba(186, 245, 208, .55), transparent 27rem),
            var(--paper);
    color: var(--ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
select {
    font: inherit;
}

.site-header,
main,
footer {
    width: min(1180px, calc(100% - 40px));
    margin-inline: auto;
}

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-block: 28px;
    border-bottom: 1px solid rgba(20, 35, 30, .18);
}

.header-tools {
    display: flex;
    gap: 20px;
    align-items: center;
}

.language-switch {
    display: inline-flex;
    padding: 3px;
    border: 1px solid rgba(20, 35, 30, .2);
    border-radius: 999px;
    background: rgba(255, 255, 255, .45);
}

.language-switch button {
    min-width: 40px;
    padding: 6px 9px;
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font-size: .7rem;
    font-weight: 900;
    letter-spacing: .08em;
}

.language-switch button.active {
    background: var(--ink);
    color: white;
}

.brand {
    display: inline-flex;
    gap: 10px;
    align-items: center;
    color: var(--ink);
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: -.02em;
    text-decoration: none;
}

.brand-mark {
    display: grid;
    width: 34px;
    height: 34px;
    place-items: center;
    border-radius: 50%;
    background: var(--ink);
    color: var(--mint);
}

.header-note,
.kicker,
.eyebrow {
    color: var(--muted);
    font-size: .75rem;
    font-weight: 800;
    letter-spacing: .13em;
    text-transform: uppercase;
}

.hero {
    display: grid;
    grid-template-columns: 1.3fr .7fr;
    gap: 48px;
    align-items: end;
    padding: 78px 0 62px;
}

.hero .eyebrow {
    grid-column: 1 / -1;
    margin: 0 0 -25px;
    color: var(--green);
}

h1,
h2,
p {
    margin-top: 0;
}

h1 {
    margin-bottom: 0;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(3.4rem, 8vw, 7.2rem);
    font-weight: 500;
    letter-spacing: -.065em;
    line-height: .88;
}

h1 em {
    color: var(--green);
    font-style: italic;
}

.hero-copy {
    max-width: 31rem;
    margin-bottom: 4px;
    color: var(--muted);
    font-size: clamp(1rem, 1.7vw, 1.25rem);
    line-height: 1.55;
}

.workspace {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border: 1px solid var(--line);
    border-radius: 28px;
    background: var(--panel);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.panel {
    padding: clamp(24px, 4vw, 48px);
}

.panel-subscribe {
    border-left: 1px solid var(--line);
    background: var(--green);
    color: #f7fff9;
}

.panel-heading,
.results-heading {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 34px;
}

.panel-heading {
    justify-content: flex-start;
}

.step {
    display: grid;
    flex: 0 0 auto;
    width: 38px;
    height: 38px;
    place-items: center;
    border: 1px solid currentColor;
    border-radius: 50%;
    font-size: .72rem;
    font-weight: 800;
}

.panel h2,
.results-section h2,
.unsubscribe-panel h2 {
    margin-bottom: 0;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 500;
    letter-spacing: -.04em;
}

.panel .kicker {
    margin-bottom: 5px;
}

.panel-subscribe .kicker,
.panel-subscribe .privacy-note {
    color: #b9d1c7;
}

label {
    display: block;
    color: inherit;
    font-size: .78rem;
    font-weight: 750;
    letter-spacing: .02em;
}

input,
select {
    width: 100%;
    min-height: 48px;
    margin-top: 8px;
    padding: 11px 12px;
    border: 1px solid var(--line);
    border-radius: 10px;
    outline: 0;
    background: #fff;
    color: var(--ink);
    transition: border-color .15s ease, box-shadow .15s ease;
}

input:focus,
select:focus {
    border-color: var(--coral);
    box-shadow: 0 0 0 3px rgba(255, 107, 74, .18);
}

.panel-subscribe input,
.panel-subscribe select {
    border-color: rgba(255, 255, 255, .28);
    background: rgba(255, 255, 255, .09);
    color: white;
}

.panel-subscribe select option {
    color: var(--ink);
}

.panel-subscribe input::placeholder {
    color: rgba(255, 255, 255, .55);
}

.route-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 10px;
    align-items: end;
    margin-bottom: 22px;
}

.route-arrow {
    display: grid;
    width: 32px;
    height: 48px;
    place-items: center;
    color: var(--coral);
    font-size: 1.35rem;
}

.field-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px 14px;
    margin-bottom: 18px;
}

.primary-button,
.secondary-button,
.quiet-button {
    display: flex;
    width: 100%;
    min-height: 54px;
    align-items: center;
    justify-content: space-between;
    margin-top: 26px;
    padding: 14px 18px;
    border: 0;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 850;
    transition: transform .15s ease, filter .15s ease;
}

button:hover:not(:disabled) {
    filter: brightness(1.05);
    transform: translateY(-1px);
}

button:disabled {
    cursor: wait;
    opacity: .65;
}

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

.secondary-button {
    background: var(--mint);
    color: var(--ink);
}

.privacy-note {
    margin: 13px 0 0;
    font-size: .75rem;
    line-height: 1.45;
}

.form-status {
    min-height: 1.2em;
    margin: 12px 0 0;
    font-size: .82rem;
    line-height: 1.45;
}

.form-status.error {
    color: #d72f21;
}

.panel-subscribe .form-status.error {
    color: #ffc4b7;
}

.form-status.success {
    color: #167340;
}

.panel-subscribe .form-status.success {
    color: var(--mint);
}

.results-section,
.unsubscribe-panel {
    margin-top: 28px;
    padding: clamp(24px, 4vw, 48px);
    border: 1px solid var(--line);
    border-radius: 28px;
    background: var(--panel);
}

.results-count {
    padding: 8px 12px;
    border-radius: 999px;
    background: var(--mint);
    font-size: .82rem;
    font-weight: 850;
}

.results-hint {
    margin: -18px 0 22px;
    color: var(--muted);
    font-size: .82rem;
}

.results-list {
    display: grid;
    gap: 12px;
}

.trip {
    border: 1px solid var(--line);
    border-radius: 16px;
    background: white;
    overflow: hidden;
    transition: border-color .18s ease, box-shadow .18s ease;
}

.trip:hover,
.trip.expanded {
    border-color: rgba(22, 79, 60, .55);
    box-shadow: 0 14px 36px rgba(20, 35, 30, .07);
}

.trip-overview {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: stretch;
}

.trip-toggle {
    display: grid;
    grid-template-columns: minmax(155px, 1.1fr) minmax(145px, 1fr) auto minmax(145px, 1fr);
    gap: 18px;
    align-items: center;
    padding: 20px;
    border: 0;
    background: transparent;
    color: var(--ink);
    cursor: pointer;
    text-align: left;
}

.trip-toggle:hover:not(:disabled) {
    filter: none;
    transform: none;
}

.trip-toggle:focus-visible,
.buy-button:focus-visible,
.language-switch button:focus-visible {
    outline: 3px solid rgba(255, 107, 74, .35);
    outline-offset: -3px;
}

.trip-route strong {
    display: block;
    margin-top: 4px;
    font-size: .92rem;
}

.route-codes {
    display: block;
    color: var(--green);
    font-size: .72rem;
    font-weight: 900;
    letter-spacing: .09em;
}

.history-callout {
    grid-column: 1 / -1;
    margin-top: -5px;
    color: var(--green);
    font-size: .72rem;
    font-weight: 800;
}

.history-callout::after {
    content: '  ↓';
}

.trip.expanded .history-callout::after {
    content: '  ↑';
}

.trip-actions {
    display: flex;
    min-width: 238px;
    flex-direction: column;
    justify-content: center;
    padding: 20px;
    border-left: 1px solid var(--line);
    background: #fbfaf5;
}

.trip-leg span,
.price-label {
    display: block;
    color: var(--muted);
    font-size: .7rem;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.trip-leg strong,
.trip-route strong {
    display: block;
    margin-top: 4px;
    font-size: 1rem;
}

.trip-line {
    width: 32px;
    height: 1px;
    background: var(--line);
}

.price-and-buy {
    display: flex;
    gap: 14px;
    align-items: center;
    justify-content: space-between;
    margin-top: 5px;
}

.trip-total {
    font-family: Georgia, "Times New Roman", serif;
    color: var(--green);
    font-size: 1.55rem;
    white-space: nowrap;
}

.buy-button {
    display: inline-flex;
    min-height: 42px;
    align-items: center;
    justify-content: center;
    padding: 10px 15px;
    border-radius: 10px;
    background: var(--coral);
    color: #1d211f;
    font-size: .78rem;
    font-weight: 900;
    text-decoration: none;
    transition: transform .15s ease, filter .15s ease;
}

.buy-button:hover {
    filter: brightness(1.04);
    transform: translateY(-1px);
}

.trip-history {
    padding: 28px;
    border-top: 1px solid var(--line);
    background: #fbfaf5;
}

.trip-history[hidden] {
    display: none;
}

.history-loading,
.history-error,
.history-note {
    margin: 0;
    color: var(--muted);
    font-size: .85rem;
}

.history-error {
    color: #b3261e;
}

.history-heading {
    display: flex;
    gap: 24px;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 22px;
}

.history-heading .kicker {
    margin-bottom: 4px;
}

.history-heading strong {
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.35rem;
}

.history-checked {
    display: grid;
    gap: 3px;
    color: var(--muted);
    font-size: .72rem;
    text-align: right;
}

.history-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.history-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 10px;
}

.history-stat {
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: white;
}

.history-stat.featured {
    border-color: var(--green);
    background: var(--mint);
}

.history-stat span {
    display: block;
    color: var(--muted);
    font-size: .67rem;
    font-weight: 850;
    letter-spacing: .06em;
    text-transform: uppercase;
}

.history-stat strong {
    display: block;
    margin-top: 5px;
    font-size: 1.05rem;
}

.history-stat.trend-down strong {
    color: #167340;
}

.history-stat.trend-up strong {
    color: #b3261e;
}

.price-chart {
    display: block;
    width: 100%;
    height: auto;
    min-height: 210px;
    margin-top: 18px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: white;
}

.chart-grid {
    stroke: #e4e8e2;
    stroke-width: 1;
}

.chart-label,
.chart-date {
    fill: var(--muted);
    font-family: Inter, ui-sans-serif, system-ui, sans-serif;
    font-size: 11px;
}

.chart-area {
    fill: rgba(186, 245, 208, .45);
}

.chart-line {
    fill: none;
    stroke: var(--green);
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 3;
}

.chart-point {
    fill: var(--coral);
    stroke: white;
    stroke-width: 2;
}

.history-note {
    margin-top: 12px;
}

.empty-state {
    padding: 38px 20px;
    border: 1px dashed var(--line);
    border-radius: 16px;
    color: var(--muted);
    text-align: center;
}

.unsubscribe-panel {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 18px;
    align-items: center;
}

.unsubscribe-panel[hidden],
.results-section[hidden] {
    display: none;
}

.quiet-button {
    width: auto;
    min-width: 150px;
    margin: 0;
    justify-content: center;
    border: 1px solid var(--ink);
    background: transparent;
    color: var(--ink);
}

.unsubscribe-panel .form-status {
    grid-column: 1 / -1;
}

footer {
    display: flex;
    gap: 32px;
    align-items: baseline;
    justify-content: space-between;
    padding-block: 50px;
    color: var(--muted);
    font-size: .78rem;
}

footer span {
    color: var(--ink);
    font-weight: 900;
}

footer p {
    margin-bottom: 0;
    text-align: right;
}

@media (max-width: 820px) {
    .hero,
    .workspace {
        grid-template-columns: 1fr;
    }

    .hero {
        gap: 28px;
        padding-block: 56px 42px;
    }

    .hero .eyebrow {
        margin-bottom: -5px;
    }

    .panel-subscribe {
        border-top: 1px solid var(--line);
        border-left: 0;
    }

    .header-note {
        display: none;
    }

    .trip-overview {
        grid-template-columns: 1fr;
    }

    .trip-toggle {
        grid-template-columns: 1fr auto 1fr;
    }

    .trip-route,
    .history-callout {
        grid-column: 1 / -1;
    }

    .trip-actions {
        min-width: 0;
        border-top: 1px solid var(--line);
        border-left: 0;
    }

    .history-stats {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 520px) {
    .site-header,
    main,
    footer {
        width: min(100% - 24px, 1180px);
    }

    .site-header {
        align-items: flex-start;
    }

    h1 {
        font-size: 3.35rem;
    }

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

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

    .route-arrow {
        width: 100%;
        height: 12px;
        transform: rotate(90deg);
    }

    .trip-toggle {
        grid-template-columns: 1fr;
        gap: 13px;
    }

    .trip-route,
    .history-callout {
        grid-column: auto;
    }

    .trip-line {
        display: none;
    }

    .trip-history {
        padding: 20px 14px;
    }

    .history-heading {
        display: block;
    }

    .history-checked {
        margin-top: 12px;
        text-align: left;
    }

    .history-stats,
    .history-meta {
        grid-template-columns: 1fr 1fr;
    }

    .price-chart {
        min-height: 165px;
    }

    .unsubscribe-panel {
        grid-template-columns: 1fr;
    }

    .quiet-button {
        width: 100%;
    }

    footer {
        display: block;
    }

    footer p {
        margin-top: 10px;
        text-align: left;
    }
}