:root {
    --border: 2px solid #000;
    --shadow: 4px 4px 0px #000;
    --shadow-hover: 2px 2px 0px #000;
    --radius: 12px;
    --bg: #f5f0e8;
    --card: #ffffff;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --text: #000000;
    --text-muted: #525252;
    --row-border: #e5e5e5;
    --row-hover: #fef9c3;
    --input-placeholder: #a3a3a3;
    --chart-bg: #fffef7;
    --accent-text: #000000;
    --font: 'Inter', system-ui, sans-serif;
}

[data-theme="dark"] {
    --bg: #141414;
    --card: #1e1e1e;
    --accent: #5b8cff;
    --accent-hover: #7ba2ff;
    --text: #f5f5f5;
    --text-muted: #a3a3a3;
    --row-border: #333333;
    --row-hover: #2a2a2a;
    --input-placeholder: #777777;
    --chart-bg: #242424;
    --accent-text: #000000;
}

/* ------------------------- Accent variants (light) ------------------------- */
:root[data-accent="green"] { --accent: #22c55e; --accent-hover: #16a34a; }
:root[data-accent="orange"] { --accent: #f97316; --accent-hover: #ea580c; }
:root[data-accent="purple"] { --accent: #a855f7; --accent-hover: #9333ea; }
:root[data-accent="pink"] { --accent: #ec4899; --accent-hover: #db2777; }
:root[data-accent="teal"] { --accent: #14b8a6; --accent-hover: #0d9488; }

/* ------------------------- Accent variants (dark) ------------------------- */
:root[data-theme="dark"][data-accent="green"] { --accent: #4ade80; --accent-hover: #22c55e; }
:root[data-theme="dark"][data-accent="orange"] { --accent: #fb923c; --accent-hover: #f97316; }
:root[data-theme="dark"][data-accent="purple"] { --accent: #c084fc; --accent-hover: #a855f7; }
:root[data-theme="dark"][data-accent="pink"] { --accent: #f472b6; --accent-hover: #ec4899; }
:root[data-theme="dark"][data-accent="teal"] { --accent: #2dd4bf; --accent-hover: #14b8a6; }

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    padding: 24px;
}

.container {
    max-width: 720px;
    margin: 0 auto;
}

.card {
    background: var(--card);
    border: var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 32px;
}

.header {
    margin-bottom: 24px;
}

.header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border: var(--border);
    border-radius: var(--radius);
    background: var(--card);
    box-shadow: 2px 2px 0px #000;
    cursor: pointer;
    color: var(--text);
    transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.theme-toggle:hover {
    transform: translate(1px, 1px);
    box-shadow: var(--shadow-hover);
}

.theme-icon {
    display: none;
    line-height: 0;
}

[data-theme="light"] .theme-icon-light {
    display: inline;
}

[data-theme="dark"] .theme-icon-dark {
    display: inline;
}

.header h1 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 4px;
}

#egg-title {
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    display: inline-block;
    border-bottom: 2px dotted transparent;
    transition: color 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

#egg-title:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

#egg-title:active {
    transform: translateY(1px);
}

.header h2 {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 4px;
}

.header .subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 500;
}

.search-wrapper {
    margin-bottom: 24px;
}

.search-input {
    width: 100%;
    padding: 12px 16px;
    font-family: var(--font);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text);
    caret-color: var(--text);
    border: var(--border);
    border-radius: var(--radius);
    box-shadow: 3px 3px 0px #000;
    background: var(--card);
    outline: none;
    transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.search-input:focus {
    box-shadow: var(--shadow-hover);
    transform: translate(1px, 1px);
}

.search-input::placeholder {
    color: var(--input-placeholder);
}

.rate-count {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 12px;
}

.hero-copy {
    font-size: 0.98rem;
    color: var(--text);
    font-weight: 500;
    line-height: 1.5;
    margin: -8px 0 18px;
    max-width: 62ch;
}

.hero-copy strong {
    color: var(--accent);
    font-weight: 700;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.header-actions .action-btn {
    height: 42px;
    white-space: nowrap;
}

.top-actions {
    display: none;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    padding: 8px 14px;
    border: var(--border);
    border-radius: var(--radius);
    background: var(--card);
    box-shadow: 2px 2px 0px #000;
    cursor: pointer;
    transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}

.action-btn:hover {
    transform: translate(1px, 1px);
    box-shadow: var(--shadow-hover);
    background: var(--accent);
    color: var(--accent-text);
}

.quick-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    margin-bottom: 20px;
}

.quick-links .quick-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-right: 4px;
}

.quick-links button {
    font-family: var(--font);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text);
    padding: 6px 12px;
    border: var(--border);
    border-radius: 999px;
    background: var(--card);
    box-shadow: 2px 2px 0px #000;
    cursor: pointer;
    transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}

.quick-links button:hover {
    transform: translate(1px, 1px);
    box-shadow: var(--shadow-hover);
    background: var(--accent);
    color: var(--accent-text);
}

.table-wrapper {
    border: var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: var(--accent);
}

th {
    padding: 14px 16px;
    text-align: left;
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: var(--border);
    color: var(--accent-text);
}

td {
    padding: 12px 16px;
    font-size: 0.95rem;
    border-bottom: 1px solid var(--row-border);
}

tr:last-child td {
    border-bottom: none;
}

tbody tr {
    transition: background 0.1s ease;
}

tbody tr:hover {
    background: var(--row-hover);
}

.currency-code {
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.currency-name {
    color: var(--text-muted);
    font-weight: 500;
}

.rate-value {
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    text-align: right;
    white-space: nowrap;
}

th:last-child {
    text-align: right;
}

.rate-actions {
    text-align: right;
    white-space: nowrap;
}

.rate-actions .copy-btn,
.rate-actions .link-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    margin-left: 6px;
    border: var(--border);
    border-radius: 8px;
    background: var(--card);
    color: var(--text);
    box-shadow: 2px 2px 0px #000;
    cursor: pointer;
    transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
    vertical-align: middle;
}

.rate-actions .copy-btn:hover,
.rate-actions .link-btn:hover {
    transform: translate(1px, 1px);
    box-shadow: var(--shadow-hover);
    background: var(--accent);
    color: var(--accent-text);
}

.rate-actions .copied {
    background: #16a34a;
    color: #ffffff;
    border-color: #166534;
}

.rate-actions .copied .copied-check {
    font-size: 14px;
    font-weight: 700;
}

@media (max-width: 480px) {
    .rate-actions .copy-btn,
    .rate-actions .link-btn {
        width: 28px;
        height: 28px;
        margin-left: 4px;
    }
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-top: 16px;
}

.page-btn {
    font-family: var(--font);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 10px 20px;
    border: var(--border);
    border-radius: var(--radius);
    background: var(--card);
    box-shadow: 2px 2px 0px #000;
    cursor: pointer;
    transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.page-btn:hover:not(:disabled) {
    transform: translate(1px, 1px);
    box-shadow: var(--shadow-hover);
}

.page-btn:active:not(:disabled) {
    transform: translate(2px, 2px);
    box-shadow: none;
}

.page-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.page-info {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}

.no-results {
    text-align: center;
    padding: 40px 16px;
    color: var(--text-muted);
    font-weight: 500;
}

.loading {
    text-align: center;
    padding: 60px 16px;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 1.1rem;
}

.error {
    text-align: center;
    padding: 40px 16px;
    color: #dc2626;
    font-weight: 600;
}

/* ------------------------- Chart ------------------------- */

.container.wide {
    max-width: 900px;
}

.chart-card {
    margin-top: 24px;
}

.chart-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

.select-input {
    padding: 10px 38px 10px 14px;
    font-family: var(--font);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    border: var(--border);
    border-radius: var(--radius);
    box-shadow: 3px 3px 0px #000;
    background: var(--card);
    outline: none;
    cursor: pointer;
    min-width: 160px;
    appearance: none;
    -webkit-appearance: none;
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px 16px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='%23000000'%3E%3Cpath d='M12 21.2501C11.81 21.2501 11.62 21.1801 11.47 21.0301L5.4 14.9601C5.11 14.6701 5.11 14.1901 5.4 13.9001C5.69 13.6101 6.17 13.6101 6.46 13.9001L12 19.4401L17.54 13.9001C17.83 13.6101 18.31 13.6101 18.6 13.9001C18.89 14.1901 18.89 14.6701 18.6 14.9601L12.53 21.0301C12.38 21.1801 12.19 21.2501 12 21.2501Z'/%3E%3Cpath d='M12 21.08C11.59 21.08 11.25 20.74 11.25 20.33V3.5C11.25 3.09 11.59 2.75 12 2.75C12.41 2.75 12.75 3.09 12.75 3.5V20.33C12.75 20.74 12.41 21.08 12 21.08Z'/%3E%3C/svg%3E");
}

[data-theme="dark"] .select-input {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='%23f5f5f5'%3E%3Cpath d='M12 21.2501C11.81 21.2501 11.62 21.1801 11.47 21.0301L5.4 14.9601C5.11 14.6701 5.11 14.1901 5.4 13.9001C5.69 13.6101 6.17 13.6101 6.46 13.9001L12 19.4401L17.54 13.9001C17.83 13.6101 18.31 13.6101 18.6 13.9001C18.89 14.1901 18.89 14.6701 18.6 14.9601L12.53 21.0301C12.38 21.1801 12.19 21.2501 12 21.2501Z'/%3E%3Cpath d='M12 21.08C11.59 21.08 11.25 20.74 11.25 20.33V3.5C11.25 3.09 11.59 2.75 12 2.75C12.41 2.75 12.75 3.09 12.75 3.5V20.33C12.75 20.74 12.41 21.08 12 21.08Z'/%3E%3C/svg%3E");
}

.page-btn {
    font-family: var(--font);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
    padding: 10px 16px;
    border: var(--border);
    border-radius: var(--radius);
    background: var(--card);
    box-shadow: 2px 2px 0px #000;
    cursor: pointer;
    transition: transform 0.12s ease, box-shadow 0.12s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.page-icon {
    display: block;
}

.range-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    border: 0;
    padding: 0;
    margin: 0;
    min-width: 0;
}

.range-buttons button {
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    padding: 8px 14px;
    border: var(--border);
    border-radius: var(--radius);
    background: var(--card);
    box-shadow: 2px 2px 0px #000;
    cursor: pointer;
    transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.range-buttons button:hover {
    transform: translate(1px, 1px);
    box-shadow: var(--shadow-hover);
}

.range-buttons button.active {
    background: var(--accent);
    color: var(--accent-text);
}

.chart-stats {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 16px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.chart-stats .stat {
    font-weight: 500;
}

.chart-stats .stat strong {
    font-weight: 700;
    color: var(--text);
    font-variant-numeric: tabular-nums;
}

.chart-stats .stat.up {
    color: #16a34a;
    font-weight: 600;
}

.chart-stats .stat.down {
    color: #dc2626;
    font-weight: 600;
}

.chart-wrapper {
    position: relative;
    width: 100%;
    height: 320px;
    border: var(--border);
    border-radius: var(--radius);
    padding: 12px;
    background: var(--chart-bg);
}

.chart-loading {
    display: none;
    text-align: center;
    padding: 8px 0;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.9rem;
}

.chart-loading.visible {
    display: block;
}

/* ------------------------- Converter ------------------------- */

.converter-card {
    margin-top: 24px;
}

.converter-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: nowrap;
}

.convert-input-group {
    display: flex;
    flex-direction: row;
    gap: 8px;
    flex: 1 1 0;
    min-width: 0;
}

.convert-input-group .select-input,
.convert-input-group .convert-amount {
    flex: 1 1 0;
    min-width: 0;
    width: 100%;
}

.convert-amount {
    font-family: var(--font);
    font-size: 1rem;
    font-weight: 600;
    padding: 10px 14px;
    border: var(--border);
    border-radius: var(--radius);
    box-shadow: 3px 3px 0px #000;
    background: var(--card);
    outline: none;
    color: var(--text);
}

.convert-amount:focus {
    box-shadow: var(--shadow-hover);
    transform: translate(1px, 1px);
}

.convert-swap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    margin-bottom: 0;
    border: var(--border);
    border-radius: 50%;
    background: var(--accent);
    color: var(--accent-text);
    box-shadow: 3px 3px 0px #000;
    cursor: pointer;
    transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.convert-swap:hover {
    transform: translate(1px, 1px) rotate(180deg);
    box-shadow: var(--shadow-hover);
}

.convert-detail {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 16px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

@media (max-width: 640px) {
    .converter-controls {
        flex-wrap: wrap;
    }

    .convert-input-group {
        flex-basis: 100%;
    }

    .convert-swap {
        margin: 0 auto;
        transform: rotate(90deg);
    }

    .convert-swap:hover {
        transform: rotate(270deg);
    }
}

.convert-detail .stat strong {
    font-weight: 700;
    color: var(--text);
    font-variant-numeric: tabular-nums;
}

/* ------------------------- Footer ------------------------- */

.site-footer {
    max-width: 900px;
    margin: 24px auto 0;
    text-align: center;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
}

.site-footer a {
    color: var(--text);
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.site-footer a:hover {
    color: var(--accent);
}

.easter-egg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    overflow: hidden;
}

.easter-egg .rain {
    position: absolute;
    top: -10%;
    font-size: 22px;
    font-weight: 700;
    color: var(--accent);
    animation: egg-fall linear forwards;
    user-select: none;
}

@keyframes egg-fall {
    to {
        transform: translateY(120vh) rotate(360deg);
    }
}

@media (max-width: 480px) {
    .chart-wrapper {
        height: 240px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 12px;
    }
    .card {
        padding: 20px;
    }
    .header h1 {
        font-size: 1.5rem;
    }
    th, td {
        padding: 10px 12px;
        font-size: 0.85rem;
    }
}