:root {
    --color-bg: #10171a;
    --color-surface: #182126;
    --color-surface-2: #212c31;
    --color-text: #edf4f1;
    --color-muted: #87988f;
    --color-accent: #24c98f;
    --color-accent-2: #7be8bf;
    --font-display: 'Unbounded', system-ui, sans-serif;
    --font-body: 'Manrope', system-ui, -apple-system, "Segoe UI", sans-serif;
    --font-mono: 'Chivo Mono', ui-monospace, "SFMono-Regular", monospace;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
}

h1, h2, h3 {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.01em;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.site-header {
    position: relative;
    background: linear-gradient(180deg, var(--color-surface-2), var(--color-surface));
    padding: 1.1rem 0;
    border-bottom: 1px solid var(--color-surface-2);
}

.site-header::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    opacity: 0.7;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--color-text);
    font-family: var(--font-display);
    font-weight: 700;
    text-decoration: none;
    font-size: 1.15rem;
}

.logo svg {
    width: 30px;
    height: 30px;
    flex-shrink: 0;
    filter: drop-shadow(0 0 10px rgba(36, 201, 143, 0.35));
}

.site-nav {
    display: flex;
    gap: 0.3rem;
}

.site-nav a {
    font-family: var(--font-mono);
    font-size: 0.76rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-muted);
    text-decoration: none;
    padding: 0.55rem 1rem;
    border-radius: 999px;
    border: 1px solid transparent;
    transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.site-nav a:hover {
    color: var(--color-text);
    border-color: var(--color-surface-2);
    background: var(--color-surface-2);
}

.site-nav a.active {
    color: var(--color-bg);
    background: var(--color-accent);
}

main {
    padding: 3rem 1.5rem;
    min-height: 60vh;
}

.hero h1 {
    margin-top: 0;
}

.hero-home {
    margin-bottom: 0.5rem;
}

.hero-lede {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(1.3rem, 3vw, 1.7rem);
    color: var(--color-text);
    margin: 0;
}

.how-it-works {
    margin: 1.25rem 0 1.75rem;
    padding: 1rem 1.25rem;
    background: var(--color-surface);
    border: 1px solid var(--color-surface-2);
    border-radius: 10px;
}

.how-it-works h2 {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-muted);
    margin: 0 0 0.75rem;
}

.steps {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.6rem 1rem;
}

.steps li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.3rem;
    height: 1.3rem;
    flex-shrink: 0;
    margin-top: 0.1rem;
    border-radius: 50%;
    background: var(--color-surface-2);
    color: var(--color-accent);
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.68rem;
}

.steps p {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.82rem;
    line-height: 1.45;
}

.steps code {
    font-family: var(--font-mono);
    color: var(--color-text);
    background: var(--color-surface-2);
    padding: 0.05rem 0.35rem;
    border-radius: 4px;
}

.site-footer {
    background: var(--color-surface);
    color: var(--color-muted);
    padding: 1.5rem 0;
    text-align: center;
    font-size: 0.9rem;
}

.site-footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.footer-nav {
    display: flex;
    gap: 1.5rem;
}

.footer-nav a {
    color: var(--color-muted);
}

.footer-nav a:hover {
    color: var(--color-text);
}

.legal-content {
    max-width: 720px;
}

.legal-content h2 {
    margin-top: 2rem;
}

.legal-content h3 {
    margin-top: 1.25rem;
    margin-bottom: 0.25rem;
}

.legal-content p {
    color: var(--color-text);
    line-height: 1.6;
}

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

.admin-nav {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-surface);
}

.admin-nav a {
    color: var(--color-muted);
    text-decoration: none;
    padding: 0.5rem 0.25rem;
    border-bottom: 2px solid transparent;
}

.admin-nav a:hover {
    color: var(--color-text);
}

.admin-nav a.active {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

.admin-form {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-width: 420px;
    margin-bottom: 2rem;
}

.admin-form label {
    color: var(--color-muted);
    font-size: 0.9rem;
}

.admin-form input,
.admin-form select {
    background: var(--color-surface);
    border: 1px solid var(--color-muted);
    color: var(--color-text);
    padding: 0.5rem;
    border-radius: 4px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-width: 480px;
}

.contact-form label {
    color: var(--color-muted);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.contact-form input,
.contact-form textarea {
    background: var(--color-surface);
    border: 1px solid var(--color-muted);
    color: var(--color-text);
    padding: 0.6rem;
    border-radius: 4px;
    font: inherit;
    resize: vertical;
}

.contact-form-honeypot {
    position: absolute;
    left: -9999px;
}

.admin-form button,
.contact-form button,
.btn-link {
    background: var(--color-accent);
    color: #fff;
    border: none;
    padding: 0.6rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    margin-top: 0.5rem;
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.alert-error {
    background: #4a1f24;
    color: #f5b5bb;
}

.alert-success {
    background: #1f4a2c;
    color: #b5f5c4;
}

.table-scroll {
    overflow-x: auto;
}

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

.admin-table th,
.admin-table td {
    text-align: left;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--color-surface);
}

.admin-table th {
    color: var(--color-muted);
    font-weight: 600;
}

.admin-log {
    background: var(--color-surface);
    color: var(--color-text);
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    font-size: 0.85rem;
    max-height: 400px;
    overflow-y: auto;
}

button[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
}

.scrabble-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    gap: 0.5rem;
    max-width: 700px;
}

.scrabble-tile {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    background: var(--color-surface);
    border-radius: 4px;
    padding: 0.5rem;
}

.scrabble-tile-letter {
    font-weight: 700;
    color: var(--color-accent);
}

.scrabble-tile input {
    width: 100%;
    background: var(--color-bg);
    border: 1px solid var(--color-muted);
    color: var(--color-text);
    padding: 0.25rem;
    border-radius: 4px;
    text-align: center;
}

.game-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-top: 2.5rem;
}

.game-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    background: var(--color-surface);
    border: 1px solid var(--color-surface-2);
    border-radius: 12px;
    padding: 1.5rem;
    text-decoration: none;
    color: var(--color-text);
    transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.game-card:hover {
    transform: translateY(-3px);
    border-color: var(--color-accent);
    box-shadow: 0 10px 28px -14px rgba(36, 201, 143, 0.45);
}

.game-card-icon {
    display: block;
    width: 56px;
    height: 56px;
    margin-bottom: 1rem;
}

.game-card-icon svg {
    width: 100%;
    height: 100%;
    display: block;
}

.game-card h2 {
    margin: 0 0 0.4rem;
    font-size: 1.15rem;
    color: var(--color-text);
}

.game-card p {
    color: var(--color-muted);
    margin: 0;
}

.game-card-go {
    margin-top: 1.2rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-accent);
}

.game-card-disabled {
    opacity: 0.55;
    pointer-events: none;
}

.rack-form {
    margin-top: 2rem;
}

.rack-tiles {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.rack-tile-input {
    width: 3rem;
    height: 3rem;
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 1.5rem;
    text-align: center;
    text-transform: uppercase;
    background: var(--color-surface);
    border: 1px solid var(--color-muted);
    color: var(--color-text);
    border-radius: 6px;
}

.board-tiles-block {
    margin-top: 1.25rem;
}

.board-tiles-label {
    display: block;
    color: var(--color-muted);
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

.board-tile-input {
    border-color: #d4af37;
}

mark.board-letter {
    background: #f5d94e;
    color: var(--color-bg);
    padding: 0 0.15rem;
    border-radius: 2px;
    font-weight: 700;
}

.rack-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1rem;
}

.rack-controls select {
    background: var(--color-surface);
    border: 1px solid var(--color-muted);
    color: var(--color-text);
    padding: 0.5rem;
    border-radius: 4px;
}

.rack-controls button {
    background: var(--color-accent);
    color: #fff;
    border: none;
    padding: 0.6rem 1.25rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}

.scrabble-results {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
    align-items: start;
}

.definition-panel {
    background: var(--color-surface);
    border-radius: 8px;
    padding: 1rem;
    position: sticky;
    top: 1rem;
    min-height: 150px;
}

.definition-panel h3 {
    margin-top: 0;
    color: var(--color-accent);
}

.definition-placeholder {
    color: var(--color-muted);
    font-size: 0.9rem;
}

.definition-list {
    padding-left: 1.25rem;
    margin: 0;
}

.definition-list li {
    margin-bottom: 0.75rem;
}

.definition-pos {
    display: block;
    color: var(--color-muted);
    font-size: 0.8rem;
    font-style: italic;
}

.result-row {
    cursor: pointer;
}

.result-row:hover,
.result-row:focus {
    background: var(--color-surface);
    outline: none;
}

@media (max-width: 640px) {
    .scrabble-results {
        grid-template-columns: 1fr;
    }

    .definition-panel {
        position: static;
    }
}

.sudoku-photo-import {
    margin: 1.5rem 0;
}

.sudoku-upload-btn {
    display: inline-block;
}

.sudoku-scan-status {
    color: var(--color-muted);
    font-size: 0.9rem;
    margin-top: 0.5rem;
    min-height: 1.2em;
}

.sudoku-scan-status.is-loading::before {
    content: '';
    display: inline-block;
    width: 0.9em;
    height: 0.9em;
    margin-right: 0.5em;
    vertical-align: -0.15em;
    border: 2px solid var(--color-muted);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: sudoku-spin 0.7s linear infinite;
}

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

.sudoku-grid-row {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    align-items: flex-start;
}

.sudoku-grid-column {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.sudoku-grid-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sudoku-mode-label {
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.03em;
}

.sudoku-mode-edit {
    color: var(--color-accent-2);
}

.sudoku-mode-solve {
    color: var(--color-accent);
}

.sudoku-status-success {
    color: var(--color-accent);
    font-weight: 700;
}

.sudoku-photo-previews {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 180px;
}

.sudoku-photo-preview-item {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.sudoku-photo-preview-label {
    color: var(--color-muted);
    font-size: 0.8rem;
}

.sudoku-photo-preview:not([hidden]) {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 6px;
    border: 1px solid var(--color-muted);
}

.sudoku-grid {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    max-width: 450px;
    margin-top: 2rem;
    border: 2px solid var(--color-text);
}

.sudoku-cell {
    width: 100%;
    aspect-ratio: 1 / 1;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 1.25rem;
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-muted);
    border-radius: 0;
}

.sudoku-cell-box-left {
    border-left: 2px solid var(--color-text);
}

.sudoku-cell-box-top {
    border-top: 2px solid var(--color-text);
}

.sudoku-cell-box-right {
    border-right: 2px solid var(--color-text);
}

.sudoku-cell-box-bottom {
    border-bottom: 2px solid var(--color-text);
}

.sudoku-cell-locked {
    font-weight: 700;
    background: rgba(255, 255, 255, 0.28);
}

.sudoku-cell-invalid {
    background: rgba(220, 53, 69, 0.55);
    color: #fff;
}

.sudoku-cell-text-invalid {
    color: #ff4d4f;
    font-weight: 700;
}

.sudoku-cell-hint {
    background: rgba(36, 201, 143, 0.28);
    color: var(--color-accent);
    font-weight: 700;
}