:root {
    color-scheme: light;
    --page: #f5f7fb;
    --surface: #fff;
    --text: #182230;
    --muted: #667085;
    --border: #e4e8ef;
    --accent: #635bdb;
    --soft-accent: #f0efff;
    --shadow: 0 18px 50px rgba(24, 34, 48, .08);
}

[data-theme="dark"] {
    color-scheme: dark;
    --page: #11151d;
    --surface: #1a202b;
    --text: #edf0f6;
    --muted: #a0a9b8;
    --border: #303948;
    --accent: #a69fff;
    --soft-accent: #292641;
    --shadow: 0 18px 50px rgba(0, 0, 0, .22);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    padding: 24px 16px 40px;
    background: var(--page);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    transition: background .2s, color .2s;
}

button,
input {
    font: inherit;
}

.wrap {
    width: min(100%, 760px);
    margin: 0 auto;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 11px;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 13px;
    background: var(--soft-accent);
    color: var(--accent);
    font-size: 21px;
}

.brand-name {
    font-size: 14px;
    font-weight: 750;
    letter-spacing: -.02em;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 12px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    font-size: 13px;
    font-weight: 650;
}

.theme-toggle:hover {
    border-color: var(--accent);
}

.theme-toggle:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

main {
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.intro {
    padding: 26px 22px 22px;
    border-bottom: 1px solid var(--border);
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--accent);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .12em;
    text-transform: uppercase;
}

h1 {
    margin: 0;
    font-size: clamp(25px, 6vw, 34px);
    line-height: 1.15;
    letter-spacing: -.045em;
}

.description {
    margin: 10px 0 0;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.55;
}

.calculator {
    padding: 20px 22px 24px;
}

.section-heading {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 0 0 12px;
    font-size: 14px;
    font-weight: 750;
}

.currency-note {
    color: var(--muted);
    font-size: 12px;
    font-weight: 500;
}

.days {
    display: grid;
    gap: 9px;
}

.day-row {
    display: grid;
    grid-template-columns: minmax(92px, 1fr) minmax(0, 1.35fr) auto;
    align-items: center;
    gap: 12px;
}

.day-name {
    font-size: 13px;
    font-weight: 650;
}

.money-input {
    position: relative;
}

.money-input span {
    position: absolute;
    top: 50%;
    left: 12px;
    transform: translateY(-50%);
    color: var(--muted);
    font-size: 14px;
    pointer-events: none;
}

input[type="number"] {
    width: 100%;
    min-height: 43px;
    padding: 10px 12px 10px 27px;
    border: 1px solid var(--border);
    border-radius: 10px;
    outline: none;
    background: var(--surface);
    color: var(--text);
    font-size: 14px;
    transition: border-color .15s, box-shadow .15s;
}

input[type="number"]:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

.off-toggle {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--muted);
    font-size: 11px;
    cursor: pointer;
}

.off-toggle input {
    appearance: none;
    position: relative;
    flex: 0 0 auto;
    width: 34px;
    height: 20px;
    margin: 0;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--border);
    cursor: pointer;
    transition: background .15s, border-color .15s;
}

.off-toggle input::before {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--surface);
    transition: transform .15s;
}

.off-toggle input:checked {
    border-color: var(--muted);
    background: var(--muted);
}

.off-toggle input:checked::before {
    transform: translateX(14px);
}

.off-toggle input:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

.day-row[data-off="true"] .day-name {
    color: var(--muted);
}

.day-row[data-off="true"] .money-input input {
    border-color: var(--border);
    background: color-mix(in srgb, var(--border) 45%, var(--surface));
    color: var(--muted);
}

.day-row[data-off="true"] .money-input span {
    color: var(--muted);
}

input::placeholder {
    color: var(--muted);
    opacity: .7;
}

.rate-panel {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-top: 20px;
    padding: 15px;
    border: 1px solid var(--border);
    border-radius: 12px;
}

.rate-copy strong {
    display: block;
    font-size: 13px;
}

.rate-copy span {
    display: block;
    margin-top: 3px;
    color: var(--muted);
    font-size: 12px;
}

.rate-input {
    position: relative;
    width: 112px;
}

.rate-input input {
    padding: 10px 30px 10px 12px;
    text-align: right;
}

.rate-input span {
    position: absolute;
    top: 50%;
    right: 12px;
    transform: translateY(-50%);
    color: var(--muted);
    pointer-events: none;
}

.results {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 18px;
}

.result-card {
    min-width: 0;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 13px;
}

.result-card.highlight {
    border-color: transparent;
    background: var(--soft-accent);
}

.result-label {
    color: var(--muted);
    font-size: 12px;
    font-weight: 650;
}

.result-value {
    display: block;
    overflow-wrap: anywhere;
    margin-top: 7px;
    font-size: clamp(20px, 5vw, 27px);
    font-weight: 800;
    letter-spacing: -.04em;
    font-variant-numeric: tabular-nums;
}

.highlight .result-value {
    color: var(--accent);
}

.footnote {
    margin: 14px 0 0;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.5;
}

@media (min-width: 600px) {
    body {
        padding-top: 40px;
    }

    header {
        margin-bottom: 30px;
    }

    .intro {
        padding: 32px 34px 27px;
    }

    .calculator {
        padding: 24px 34px 30px;
    }

    .days {
        grid-template-columns: 1fr 1fr;
        column-gap: 20px;
    }

    .day-row {
        grid-template-columns: minmax(62px, .7fr) minmax(0, 1.3fr) auto;
    }
}

@media (max-width: 360px) {
    body {
        padding-inline: 10px;
    }

    .intro,
    .calculator {
        padding-inline: 16px;
    }

    .day-row {
        grid-template-columns: 68px minmax(0, 1fr) auto;
        gap: 6px;
    }
}