[data-theme="dark"] {
    --bg: #0f172a;
    --card-bg: #1e293b;
    --input-bg: #0f172a;
    --accent: #38bdf8;
    --accent-soft: rgba(56, 189, 248, 0.15);
    --range-bg: rgba(56, 189, 248, 0.08);
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --border: #334155;
    --border-hover: #475569;
    --danger: #f43f5e;
    --weekend: #fb7185;
}

[data-theme="light"] {
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --input-bg: #f1f5f9;
    --accent: #0284c7;
    --accent-soft: rgba(2, 132, 199, 0.12);
    --range-bg: rgba(2, 132, 199, 0.06);
    --text: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --border-hover: #cbd5e1;
    --danger: #e11d48;
    --weekend: #e11d48;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

body {
    background-color: var(--bg);
    color: var(--text);
    display: flex;
    justify-content: center;
    min-height: 100vh;
    padding: 16px;
}

.app-container {
    width: 100%;
    max-width: 480px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: max-width 0.3s ease;
}

/* Динамическое расширение при открытии карточек */
.app-container.cards-2 {
    max-width: 880px;
}
.app-container.cards-3 {
    max-width: 1240px;
}

/* Шапка */
.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--accent);
}

.header-actions {
    display: flex;
    gap: 8px;
}

.action-btn, .theme-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 7px 12px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
}

.action-btn.active {
    background: var(--accent-soft);
    color: var(--accent);
    border-color: var(--accent);
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: 4px;
}

/* Блок карточек */
.cards-wrapper {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.converter-card, .calc-card {
    flex: 1 1 320px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

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

.card-header h2, .calc-header h2 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.rate-badge {
    font-size: 0.7rem;
    color: var(--accent);
    background: var(--accent-soft);
    padding: 3px 8px;
    border-radius: 6px;
    font-weight: 600;
}

.bank-selector-wrapper {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.bank-selector-wrapper label {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.rate-info-footer {
    background: var(--input-bg);
    border: 1px dashed var(--border);
    border-radius: 10px;
    padding: 10px 12px;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
}

/* Сетка со всеми валютами */
.all-currencies-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 4px;
}

.all-currencies-title {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.all-currencies-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
}

.curr-item {
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
}

.curr-item-code {
    font-weight: 700;
    color: var(--text-muted);
}

.curr-item-value {
    font-weight: 700;
    color: var(--accent);
}

/* Категории */
.categories {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.cat-btn {
    flex: 1 1 calc(33.33% - 6px);
    min-width: 85px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 7px 8px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.78rem;
    text-align: center;
}

.cat-btn.active, .cat-btn:hover {
    background: var(--accent-soft);
    color: var(--accent);
    border-color: var(--accent);
}

.mode-btn {
    background: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--accent);
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.75rem;
    cursor: pointer;
}

.hidden { display: none !important; }

/* Поля ввода */
.input-block {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 8px;
}

.input-block label {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.input-block input {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 10px 12px;
    border-radius: 10px;
    font-size: 0.95rem;
    outline: none;
}

.input-block input:focus {
    border-color: var(--accent);
}

.select-wrapper {
    position: relative;
    width: 100%;
}

.select-wrapper select {
    width: 100%;
    appearance: none;
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 10px 30px 10px 12px;
    border-radius: 10px;
    font-size: 0.9rem;
    cursor: pointer;
    outline: none;
}

.select-wrapper::after {
    content: "▾";
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.swap-btn {
    align-self: center;
    background: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--accent);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Двухколоночная сетка дат */
.date-converter-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 520px) {
    .date-converter-grid {
        grid-template-columns: 1fr;
    }
}

.date-inputs-col {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Стили встроенного календаря */
.calendar-box {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.cal-title-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cal-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 700;
}

.day-of-week-badge {
    font-size: 0.72rem;
    color: var(--accent);
    font-weight: 600;
}

.inline-calendar {
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 10px;
}

.cal-nav-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.cal-month-title {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text);
}

.cal-nav-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    width: 26px;
    height: 26px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cal-nav-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.cal-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.cal-weekdays .wknd {
    color: var(--weekend);
}

.cal-days-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
}

.cal-day-cell {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text);
    user-select: none;
}

.cal-day-cell:hover:not(.empty) {
    background: var(--accent-soft);
    color: var(--accent);
}

.cal-day-cell.empty {
    cursor: default;
}

.cal-day-cell.selected {
    background: var(--accent) !important;
    color: #0f172a !important;
    font-weight: 800;
}

.cal-day-cell.in-range {
    background: var(--range-bg);
}

.cal-day-cell.is-weekend:not(.selected) {
    color: var(--weekend);
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    color: var(--text-muted);
    cursor: pointer;
    margin-top: 4px;
}

.checkbox-container input {
    accent-color: var(--accent);
    width: 16px;
    height: 16px;
}

/* Результаты расчёта дат */
.date-results-col {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.result-box.primary {
    background: var(--accent-soft);
    border: 1px solid var(--accent);
    border-radius: 12px;
    padding: 12px;
    text-align: center;
}

.res-value {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--accent);
    display: block;
}

.res-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.mini-stat {
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px;
    text-align: center;
}

.stat-val {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
    display: block;
}

.stat-lbl {
    font-size: 0.65rem;
    color: var(--text-muted);
}

.detailed-period {
    background: var(--input-bg);
    border: 1px dashed var(--border);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 0.78rem;
    display: flex;
    justify-content: space-between;
}

.period-label { color: var(--text-muted); }
.period-value { font-weight: 700; color: var(--accent); }

/* Калькулятор */
.calc-display {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 10px;
    border-radius: 8px;
    font-size: 1.2rem;
    text-align: right;
    outline: none;
    font-weight: 600;
}

.calc-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
}

.scientific-grid {
    grid-template-columns: repeat(5, 1fr);
}

.calc-btn {
    background: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 10px 0;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
}

.sci-btn { font-size: 0.75rem; color: var(--text-muted); }
.btn-accent { color: var(--accent); }
.btn-danger { color: var(--danger); }
.btn-muted { color: var(--text-muted); }

.btn-primary {
    background: var(--accent);
    color: #0f172a;
    border-color: var(--accent);
}

.btn-wide { grid-column: span 2; }

.ad-slot {
    border: 1px dashed var(--border);
    border-radius: 10px;
    padding: 12px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.75rem;
}

.seo-content {
    font-size: 0.8rem;
    color: var(--text-muted);
}

footer {
    text-align: center;
    font-size: 0.72rem;
    color: var(--text-muted);
}