:root {
    --color-bg: #FAFAFA;
    --color-surface: #FFFFFF;
    --color-border: rgba(91, 134, 229, 0.15);
    --color-border-focus: #5B86E5;
    --color-text: #1A1A2E;
    --color-text-secondary: #6B7280;
    --color-text-muted: #9CA3AF;
    --color-primary: #5B86E5;
    --color-primary-hover: #4A75D4;
    --color-primary-glow: rgba(91, 134, 229, 0.2);
    --color-accent: #36D1DC;
    --color-accent-glow: rgba(54, 209, 220, 0.15);
    --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);
}

[data-theme="dark"] {
    --color-bg: #1A1A2E;
    --color-surface: #22223B;
    --color-border: rgba(91, 134, 229, 0.2);
    --color-text: #E8E8F0;
    --color-text-secondary: #9B95B8;
    --color-text-muted: #5C5675;
}

*,
*::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;
    transition: background var(--transition), color var(--transition);
}

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

.header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.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: 1100px;
    margin: 0 auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
}

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

.btn-primary:hover {
    background: var(--color-primary-hover);
}

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

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

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

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

.search-section input {
    width: 100%;
    padding: 12px 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--color-text);
    transition: border-color var(--transition);
}

.search-section input:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.category-chips {
    display: flex;
    gap: 6px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.chip {
    padding: 5px 14px;
    border: 1px solid var(--color-border);
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    background: transparent;
    cursor: pointer;
    transition: all var(--transition);
}

.chip:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.chip.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.stats-bar {
    font-size: 0.78rem;
    color: var(--color-text-muted);
}

/* Recent */
.recent-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 16px 20px;
}

.recent-section h2 {
    font-size: 0.82rem;
    font-weight: 700;
    margin-bottom: 10px;
}

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

/* Entity Grid */
.entity-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 8px;
}

.entity-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 14px 10px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.entity-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.entity-char {
    font-size: 1.8rem;
    line-height: 1.2;
    min-height: 36px;
}

.entity-name {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--color-primary);
    word-break: break-all;
}

.entity-code {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    color: var(--color-text-muted);
}

.entity-category {
    font-size: 0.55rem;
    color: var(--color-accent);
    font-weight: 600;
    text-transform: uppercase;
}

.recent-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition);
}

.recent-chip:hover {
    border-color: var(--color-primary);
}

.recent-chip .rc-char {
    font-size: 1rem;
}

.recent-chip .rc-name {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    padding: 10px 24px;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 0.87rem;
    font-weight: 500;
    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: 600px) {
    .entity-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }

    .app-main {
        padding: 16px;
    }
}