/* Colours match MacMargin's SwiftUI palette; dark mode follows the phone's setting. */
:root {
    --canvas-top: #f7f9fe;
    --canvas-bottom: #edf2fc;
    --panel: #fafbfe;
    --card-border: #d9e0f2;
    --accent: #3363fa;
    --primary-text: #293040;
    --secondary-text: #636e85;
    --field-background: rgba(255, 255, 255, 0.92);
    --field-border: #ccd9f2;
    --field-border-active: #94b0ff;
    --tab-track: rgba(255, 255, 255, 0.6);
    --card-shadow: 0 10px 32px rgba(0, 0, 0, 0.05);
    --field-shadow-active: 0 4px 20px rgba(51, 99, 250, 0.12);
    --selection: rgba(51, 99, 250, 0.16);
    /* Rand weakening (rate up) is bad news for imports, so it shows red. */
    --rand-weaker: #d33a2c;
    --rand-stronger: #1f9d55;
    color-scheme: light;
}

@media (prefers-color-scheme: dark) {
    :root {
        --canvas-top: #0d1220;
        --canvas-bottom: #121a2d;
        --panel: #172036;
        --card-border: #28324b;
        --accent: #6d90ff;
        --primary-text: #e6eaf3;
        --secondary-text: #97a1b8;
        --field-background: #0f1628;
        --field-border: #2b3656;
        --field-border-active: #6d90ff;
        --tab-track: rgba(255, 255, 255, 0.05);
        --card-shadow: 0 10px 32px rgba(0, 0, 0, 0.35);
        --field-shadow-active: 0 4px 20px rgba(109, 144, 255, 0.18);
        --selection: rgba(109, 144, 255, 0.3);
        --rand-weaker: #ff7b6e;
        --rand-stronger: #4cd488;
        color-scheme: dark;
    }
}

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

html {
    -webkit-text-size-adjust: 100%;
    background: var(--canvas-top);
}

body {
    margin: 0;
    min-height: 100vh;
    min-height: 100dvh;
    background: linear-gradient(135deg, var(--canvas-top), var(--canvas-bottom)) fixed;
    color: var(--primary-text);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
    -webkit-tap-highlight-color: transparent;
}

::selection {
    background: var(--selection);
}

.app {
    max-width: 456px;
    margin: 0 auto;
    padding:
        max(18px, env(safe-area-inset-top))
        max(16px, env(safe-area-inset-right))
        max(24px, env(safe-area-inset-bottom))
        max(16px, env(safe-area-inset-left));
    display: flex;
    flex-direction: column;
    gap: 18px;
}

/* Segmented tab control */
.tabs {
    display: flex;
    gap: 4px;
    padding: 4px;
    border-radius: 14px;
    background: var(--tab-track);
    border: 1px solid var(--card-border);
}

.tab {
    flex: 1;
    padding: 10px 0;
    border: 0;
    border-radius: 10px;
    background: transparent;
    color: var(--secondary-text);
    font: inherit;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    touch-action: manipulation;
}

.tab[aria-selected="true"] {
    background: var(--accent);
    color: #fff;
}

/* Card */
.card {
    display: flex;
    flex-direction: column;
    gap: 18px;
    padding: 22px;
    border-radius: 26px;
    background: var(--panel);
    border: 1px solid var(--card-border);
    box-shadow: var(--card-shadow);
}

.card[hidden] {
    display: none;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h1 {
    margin: 0;
    font-size: 19px;
    font-weight: 600;
}

.clear-button {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    /* Generous padding makes a 44pt touch target without changing the look. */
    margin: -10px -10px -10px 0;
    padding: 10px;
    border: 0;
    background: none;
    color: var(--accent);
    font: inherit;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    touch-action: manipulation;
}

.clear-button svg {
    width: 17px;
    height: 17px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.6;
    stroke-linecap: round;
}

.clear-button:disabled {
    color: var(--secondary-text);
    opacity: 0.55;
    cursor: default;
}

/* Fields */
.field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-width: 0;
}

.field-title {
    font-size: 15px;
    font-weight: 600;
}

.field-box {
    display: flex;
    align-items: center;
    gap: 12px;
    height: 48px;
    padding: 0 14px 0 16px;
    border-radius: 12px;
    background: var(--field-background);
    border: 1px solid var(--field-border);
    transition: border-color 0.15s, box-shadow 0.15s;
}

.field-box.is-active {
    border-color: var(--field-border-active);
    box-shadow: var(--field-shadow-active);
}

.field-box input {
    flex: 1;
    min-width: 0;
    height: 100%;
    padding: 0;
    border: 0;
    outline: none;
    background: transparent;
    color: var(--accent);
    caret-color: var(--accent);
    /* 16px or more stops iOS Safari zooming in when a field is tapped. */
    font: inherit;
    font-size: 17px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.field-box.is-active input {
    color: var(--primary-text);
}

.unit {
    color: var(--accent);
    font-size: 13px;
    font-weight: 700;
}

/* Forex tab */
.forex-status {
    margin: -8px 0 0;
    color: var(--secondary-text);
    font-size: 14px;
}

.forex-status.is-stale {
    color: var(--rand-weaker);
}

.forex-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.forex-list:empty {
    display: none;
}

.forex-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-height: 64px;
    padding: 10px 16px;
    border-radius: 12px;
    background: var(--field-background);
    border: 1px solid var(--field-border);
}

.forex-pair {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.forex-code {
    font-size: 16px;
    font-weight: 700;
}

.forex-name {
    color: var(--secondary-text);
    font-size: 13px;
}

.forex-value {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}

.forex-rate {
    color: var(--accent);
    font-size: 19px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.forex-rate .unit {
    margin-right: 3px;
}

.forex-change {
    font-size: 13px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    color: var(--secondary-text);
}

.forex-change.is-up {
    color: var(--rand-weaker);
}

.forex-change.is-down {
    color: var(--rand-stronger);
}

.forex-message {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    color: var(--secondary-text);
    font-size: 14px;
}

.forex-message[hidden] {
    display: none;
}

.forex-message p {
    margin: 0;
}

.retry-button {
    flex: none;
    padding: 8px 16px;
    border: 0;
    border-radius: 10px;
    background: var(--accent);
    color: #fff;
    font: inherit;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    touch-action: manipulation;
}

.forex-footnote {
    margin: 0;
    color: var(--secondary-text);
    font-size: 12px;
}

.clear-button.is-loading svg {
    animation: spin 0.8s linear infinite;
}

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

@media (prefers-reduced-motion: reduce) {
    .clear-button.is-loading svg {
        animation: none;
    }
}

@media (max-width: 360px) {
    .card {
        padding: 18px;
    }

    .field-box {
        padding: 0 10px 0 12px;
        gap: 8px;
    }
}