:root {
    color-scheme: light;
    --font-heading: "Space Grotesk", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
    --font-body: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
    --font-mono: "JetBrains Mono", "Cascadia Mono", "Segoe UI Mono", monospace;

    --bg: #f6f4f1;
    --bg-elevated: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.82);
    --text: #0f172a;
    --text-muted: #5b6472;
    --border: rgba(15, 23, 42, 0.12);
    --accent: #0ea5a4;
    --accent-strong: #0c8f8d;
    --accent-warm: #f59e0b;
    --shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --output-bg: #0b1324;
    --output-text: #e2e8f0;
    --footer-link: #0c8f8d;
    --footer-link-hover: #f59e0b;
}

[data-theme="dark"] {
    color-scheme: dark;
    --bg: #0a0e13;
    --bg-elevated: #111824;
    --bg-glass: rgba(17, 24, 36, 0.88);
    --text: #f8fafc;
    --text-muted: #9aa4b2;
    --border: rgba(148, 163, 184, 0.18);
    --accent: #21c6bb;
    --accent-strong: #14b3a7;
    --accent-warm: #fbbf24;
    --shadow: 0 20px 40px rgba(3, 7, 18, 0.6);
    --output-bg: #0b1220;
    --output-text: #e2e8f0;
    --footer-link: #6ee7d8;
    --footer-link-hover: #fbbf24;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font-body);
    background: radial-gradient(circle at top left, rgba(14, 165, 164, 0.12), transparent 55%),
        radial-gradient(circle at 20% 20%, rgba(245, 158, 11, 0.12), transparent 50%),
        var(--bg);
    color: var(--text);
    min-height: 100vh;
}

a {
    color: inherit;
}

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

.page {
    max-width: 1280px;
    margin: 0 auto;
    padding: 24px 20px 40px;
    position: relative;
}

.site-header {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 24px;
}

.header-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.brand-mark {
    width: 64px;
    height: 64px;
    flex: 0 0 auto;
}

.brand-kicker {
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-size: 0.68rem;
    color: var(--text-muted);
}

.site-header h1 {
    margin: 6px 0 0;
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 3vw, 2.6rem);
}

.hero-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 18px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 18px 22px;
    box-shadow: var(--shadow);
}

.hero-card h2 {
    margin: 0 0 6px;
    font-family: var(--font-heading);
    font-size: 1.25rem;
}

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

.hero-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.hero-chips span {
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(14, 165, 164, 0.12);
    color: var(--accent-strong);
    font-size: 0.85rem;
    border: 1px solid rgba(14, 165, 164, 0.25);
}

.layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
}

.panel {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 18px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 14px;
    animation: rise 0.6s ease both;
}

.panel-header h3 {
    margin: 0;
    font-family: var(--font-heading);
}

.panel-header p {
    margin: 6px 0 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

.panel-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.presets-section,
.form-section,
.output-section {
    grid-column: span 1;
}

.preset-list {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.preset-card {
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    background: linear-gradient(140deg, rgba(14, 165, 164, 0.08), transparent 70%);
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease;
    min-height: 72px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.preset-card h3 {
    margin: 0 0 6px;
    font-size: 1rem;
    font-family: var(--font-heading);
}

.preset-card p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.preset-card:hover {
    transform: translateY(-2px);
    border-color: rgba(14, 165, 164, 0.4);
}

.preset-card.selected {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(14, 165, 164, 0.2);
}

form#config-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.9rem;
}

.form-group.full {
    grid-column: 1 / -1;
}

.form-group label {
    font-weight: 600;
}

.field-help {
    margin: 0;
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.form-group input[type="text"],
.form-group select,
.form-group textarea {
    padding: 8px 10px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg-glass);
    color: var(--text);
    font-size: 0.9rem;
}

.form-group input[type="checkbox"] {
    accent-color: var(--accent);
    margin-right: 6px;
}

.checkbox-group label {
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

.checkbox-group .field-help {
    margin-left: 30px;
}

.divider {
    height: 1px;
    background: var(--border);
}

.form-block {
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    padding: 12px;
}

.form-block legend {
    padding: 0 8px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--accent);
}

.provider-section legend,
.profile-section legend {
    font-size: 1rem;
    letter-spacing: 0.02em;
}

.provider-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.provider-actions {
    display: flex;
    justify-content: flex-end;
}

.provider-list {
    display: grid;
    gap: 12px;
}

.provider-card,
.profile-card,
.mcp-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px;
    background: var(--bg-glass);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.provider-header {
    display: flex;
    align-items: center;
    gap: 8px;
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 8px;
}

.mcp-header {
    display: flex;
    align-items: center;
    gap: 8px;
}

.provider-header .header-field,
.profile-header .header-field,
.mcp-header .header-field {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.card-toggle {
    border-radius: 999px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    padding: 6px 10px;
    cursor: pointer;
    font-size: 0.8rem;
}

.card-toggle:hover {
    color: var(--accent);
    border-color: rgba(14, 165, 164, 0.5);
}

.provider-header input[type="text"] {
    flex: 1;
}

.profile-header input[type="text"] {
    flex: 1;
}

.mcp-header input[type="text"] {
    flex: 1;
}

.provider-header input[type="text"],
.profile-header input[type="text"] {
    padding: 8px 10px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg-glass);
    color: var(--text);
    font-size: 0.9rem;
}

.mcp-header input[type="text"] {
    padding: 8px 10px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg-glass);
    color: var(--text);
    font-size: 0.9rem;
}

.provider-remove {
    border-radius: 999px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    padding: 6px 10px;
    cursor: pointer;
    font-size: 0.8rem;
}

.provider-remove:hover {
    color: var(--accent-warm);
    border-color: rgba(245, 158, 11, 0.5);
}

.provider-grid,
.profile-grid,
.mcp-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.provider-grid .form-group,
.profile-grid .form-group,
.mcp-grid .form-group {
    margin-bottom: 0;
}

.card-details {
    display: none;
}

.card-details.is-open {
    display: grid;
}

.profile-list {
    display: grid;
    gap: 12px;
}

.mcp-list {
    display: grid;
    gap: 12px;
}

.output-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.output-preview {
    background: var(--output-bg);
    color: var(--output-text);
    border-radius: var(--radius-sm);
    padding: 14px;
    min-height: 260px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    white-space: pre-wrap;
    word-break: break-word;
}

.primary-button,
.ghost-button {
    border-radius: 999px;
    border: 1px solid transparent;
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.primary-button {
    background: linear-gradient(120deg, var(--accent), var(--accent-warm));
    color: #ffffff;
}

[data-theme="dark"] .primary-button {
    background: linear-gradient(120deg, #1dd6cb, #22d3ee);
    color: #0b1220;
    border: 1px solid rgba(255, 255, 255, 0.25);
    box-shadow: 0 8px 20px rgba(34, 211, 238, 0.35);
}

.ghost-button {
    background: transparent;
    border-color: var(--border);
    color: var(--text);
}

.primary-button:hover,
.ghost-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 18px rgba(14, 165, 164, 0.2);
}

.icon-button {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg-elevated);
    display: grid;
    place-items: center;
    cursor: pointer;
    position: relative;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.icon-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 20px rgba(14, 165, 164, 0.2);
}

.theme-icon {
    position: absolute;
    width: 22px;
    height: 22px;
    color: var(--text);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.theme-icon svg {
    width: 100%;
    height: 100%;
    fill: currentColor;
}

[data-theme="dark"] .theme-icon.sun {
    opacity: 0;
    transform: scale(0.8);
}

[data-theme="dark"] .theme-icon.moon {
    opacity: 1;
    transform: scale(1);
}

.theme-icon.moon {
    opacity: 0;
    transform: scale(0.8);
}

.site-footer {
    margin-top: 28px;
    padding: 18px 0 0;
    border-top: 1px solid var(--border);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.site-footer a {
    color: var(--footer-link);
    font-weight: 600;
    text-decoration: none;
}

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

@keyframes rise {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 1200px) {
    .preset-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 900px) {
    .form-grid {
        grid-template-columns: 1fr;
    }

    .form-group.full {
        grid-column: auto;
    }

    .preset-list {
        grid-template-columns: 1fr;
    }

    .provider-grid {
        grid-template-columns: 1fr;
    }

    .profile-grid {
        grid-template-columns: 1fr;
    }

    .mcp-grid {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    .panel {
        animation: none;
    }
}