:root {
    --color-bg: #0A1A1A;
    --color-surface: rgba(0, 206, 201, 0.05);
    --color-surface-solid: #0D2626;
    --color-glass: rgba(129, 236, 236, 0.04);
    --color-border: rgba(0, 206, 201, 0.15);
    --color-border-focus: #00CEC9;
    --color-text: #E0F0EF;
    --color-text-secondary: #8BBFBD;
    --color-text-muted: #4D7A78;
    --color-primary: #00CEC9;
    --color-primary-hover: #00B5B1;
    --color-primary-glow: rgba(0, 206, 201, 0.25);
    --color-secondary: #81ECEC;
    --color-accent: #FF7675;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
}

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

.app-header {
    background: var(--color-surface-solid);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-primary);
}

.logo h1 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-text);
}

.app-main {
    max-width: 1000px;
    margin: 0 auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 18px;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.87rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-primary {
    background: var(--color-primary);
    color: #0A1A1A;
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    box-shadow: 0 4px 16px var(--color-primary-glow);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
}

.btn-ghost:hover {
    color: var(--color-text);
    background: var(--color-glass);
}

.btn-sm {
    padding: 5px 10px;
    font-size: 0.78rem;
}

/* Input Section */
.input-section {
    background: var(--color-surface-solid);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
}

.input-section h2 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 14px;
}

.color-input-row {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.color-picker-wrap {
    position: relative;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 2px solid var(--color-border);
    cursor: pointer;
}

.color-picker-wrap input[type="color"] {
    position: absolute;
    inset: -4px;
    width: calc(100% + 8px);
    height: calc(100% + 8px);
    border: none;
    cursor: pointer;
}

.color-preview {
    display: none;
}

.color-input-row input[type="text"] {
    width: 120px;
    padding: 10px 14px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-text);
    text-transform: uppercase;
}

.color-input-row input[type="text"]:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(0, 206, 201, 0.1);
}

.saved-colors {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.saved-swatch {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
}

.saved-swatch:hover {
    transform: scale(1.15);
    border-color: var(--color-primary);
}

/* Scale */
.scale-section {
    background: var(--color-surface-solid);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
}

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

.scale-header h2 {
    font-size: 0.9rem;
    font-weight: 700;
}

.scale-modes {
    display: flex;
    gap: 4px;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    padding: 3px;
}

.mode-btn {
    padding: 5px 14px;
    border: none;
    border-radius: 6px;
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-text-muted);
    background: transparent;
    cursor: pointer;
    transition: all var(--transition);
}

.mode-btn.active {
    background: var(--color-primary);
    color: #0A1A1A;
}

.scale-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 8px;
}

.scale-swatch {
    border-radius: var(--radius-sm);
    padding: 16px 10px 10px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.06);
    cursor: pointer;
    transition: all var(--transition);
    min-height: 80px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    gap: 4px;
}

.scale-swatch:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.scale-swatch .sw-step {
    font-size: 0.68rem;
    font-weight: 700;
    opacity: 0.7;
}

.scale-swatch .sw-hex {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
}

.scale-swatch .sw-contrast {
    font-size: 0.6rem;
    opacity: 0.6;
}

.scale-swatch .sw-badge {
    display: inline-block;
    font-size: 0.55rem;
    font-weight: 700;
    padding: 1px 5px;
    border-radius: 3px;
}

.sw-badge.pass {
    background: rgba(0, 206, 201, 0.2);
    color: #00CEC9;
}

.sw-badge.fail {
    background: rgba(255, 118, 117, 0.2);
    color: #FF7675;
}

/* Preview */
.preview-section {
    background: var(--color-surface-solid);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.preview-section h2 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 14px;
}

.component-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.comp-card {
    border-radius: var(--radius-sm);
    padding: 16px 20px;
    min-width: 200px;
    flex: 1;
}

.comp-card .comp-title {
    font-size: 0.78rem;
    font-weight: 700;
    margin-bottom: 8px;
    opacity: 0.7;
}

.comp-btn-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.comp-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-family: var(--font-sans);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.comp-btn:hover {
    transform: translateY(-1px);
}

/* Export */
.export-section {
    background: var(--color-surface-solid);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
    animation: fadeIn 0.3s ease;
}

.export-section h2 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 14px;
}

.export-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 12px;
}

.export-tab {
    padding: 6px 14px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    background: transparent;
    cursor: pointer;
    transition: all var(--transition);
}

.export-tab.active {
    background: var(--color-primary);
    color: #0A1A1A;
    border-color: var(--color-primary);
}

.export-tab:hover:not(.active) {
    border-color: var(--color-primary);
    color: var(--color-text);
}

.export-code-wrap {
    position: relative;
}

.export-code {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 16px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-secondary);
    overflow-x: auto;
    white-space: pre;
    line-height: 1.6;
    max-height: 300px;
    overflow-y: auto;
}

.btn-copy {
    position: absolute;
    top: 8px;
    right: 8px;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    padding: 10px 24px;
    background: var(--color-primary);
    color: #0A1A1A;
    border-radius: var(--radius-sm);
    font-size: 0.87rem;
    font-weight: 600;
    box-shadow: 0 4px 24px var(--color-primary-glow);
    z-index: 200;
    animation: toastSlide 0.3s ease;
}

@keyframes toastSlide {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

@media (max-width: 700px) {
    .scale-grid {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    }

    .app-main {
        padding: 16px;
    }

    .color-input-row {
        flex-direction: column;
        align-items: stretch;
    }

    .color-input-row input[type="text"] {
        width: 100%;
    }
}