/* ============================================
   SQL Formatter Visualizer — Styles
   Theme: Dark code-editor, Primary: #F59E0B
   ============================================ */

:root {
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

    --bg: #0F172A;
    --bg-card: #1E293B;
    --bg-input: #0F172A;
    --bg-hover: #273548;

    --border: rgba(148, 163, 184, 0.12);
    --border-hover: rgba(148, 163, 184, 0.22);
    --border-focus: #F59E0B;

    --text: #E2E8F0;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;

    --primary: #F59E0B;
    --primary-glow: rgba(245, 158, 11, 0.2);
    --primary-dark: #D97706;

    --kw: #F59E0B;
    --fn: #38BDF8;
    --str: #34D399;
    --num: #C084FC;
    --op: #94A3B8;
    --comment: #64748B;

    --node-from: #1E293B;
    --node-border: #F59E0B;
    --node-text: #E2E8F0;

    --radius: 10px;
    --radius-sm: 6px;
    --shadow: 0 2px 16px rgba(0, 0, 0, 0.4);
    --transition: 0.2s ease;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

.app {
    max-width: 780px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 24px;
}

.header-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0F172A;
    box-shadow: 0 0 20px var(--primary-glow);
}

.header-title {
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.header-sub {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 14px;
    box-shadow: var(--shadow);
    animation: fadeIn 0.35s ease-out;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.card-title {
    font-size: 0.9rem;
    font-weight: 600;
}

.toolbar {
    display: flex;
    gap: 6px;
    align-items: center;
}

.dialect-select {
    padding: 6px 10px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 0.78rem;
    cursor: pointer;
}

.dialect-select option {
    background: var(--bg-card);
}

.dialect-select:focus {
    outline: none;
    border-color: var(--primary);
}

.btn-tool {
    padding: 6px 10px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.78rem;
    cursor: pointer;
    transition: all var(--transition);
}

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

.sql-input {
    width: 100%;
    min-height: 200px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text);
    resize: vertical;
    line-height: 1.6;
    tab-size: 2;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.sql-input::placeholder {
    color: var(--text-muted);
}

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

.action-row {
    display: flex;
    gap: 10px;
    margin-top: 14px;
}

.btn-primary,
.btn-secondary {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 16px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #0F172A;
    box-shadow: 0 2px 12px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--primary-glow);
}

.btn-secondary {
    background: var(--bg-input);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--border-hover);
}

/* Output */
.sql-output {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px;
    overflow-x: auto;
    line-height: 1.7;
    font-size: 0.84rem;
}

.sql-output code {
    font-family: var(--font-mono);
    font-size: 0.84rem;
    white-space: pre-wrap;
    word-break: break-word;
}

/* Syntax Highlighting Classes */
.sql-kw {
    color: var(--kw);
    font-weight: 600;
}

.sql-fn {
    color: var(--fn);
}

.sql-str {
    color: var(--str);
}

.sql-num {
    color: var(--num);
}

.sql-op {
    color: var(--op);
}

.sql-comment {
    color: var(--comment);
    font-style: italic;
}

/* Complexity Badge */
.complexity-badge {
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.complexity-low {
    background: rgba(52, 211, 153, 0.15);
    color: #34D399;
}

.complexity-medium {
    background: rgba(245, 158, 11, 0.15);
    color: #F59E0B;
}

.complexity-high {
    background: rgba(248, 113, 113, 0.15);
    color: #F87171;
}

/* Diagram */
.diagram-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 20px 0;
}

.diagram-node {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    min-width: 160px;
    background: var(--bg-input);
    border: 2px solid var(--node-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--node-text);
    text-align: center;
    position: relative;
    transition: all var(--transition);
}

.diagram-node:hover {
    background: var(--bg-hover);
    box-shadow: 0 0 12px var(--primary-glow);
}

.diagram-node .node-label {
    font-size: 0.62rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    position: absolute;
    top: -8px;
    left: 12px;
    background: var(--bg-card);
    padding: 0 4px;
}

.diagram-arrow {
    width: 2px;
    height: 24px;
    background: var(--primary);
    position: relative;
}

.diagram-arrow::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: -4px;
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 6px solid var(--primary);
}

.sub-title {
    font-size: 0.82rem;
    font-weight: 600;
    margin: 16px 0 10px;
}

.table-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.table-chip {
    padding: 4px 12px;
    background: var(--primary-glow);
    border: 1px solid var(--primary);
    border-radius: 20px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--primary);
    font-weight: 600;
}

.footer {
    text-align: center;
    margin-top: 16px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: var(--bg-card);
    border: 1px solid var(--primary);
    border-radius: var(--radius-sm);
    padding: 10px 20px;
    font-size: 0.82rem;
    color: var(--primary);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    pointer-events: none;
    z-index: 100;
}

.toast.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

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

@media (max-width: 520px) {
    .app {
        padding: 16px 10px 32px;
    }

    .action-row {
        flex-direction: column;
    }

    .header-title {
        font-size: 1.1rem;
    }
}