/* ================================================================
   HelmholtzHunter — Studio Bass Trap Tuner
   Studio purple/charcoal dark theme · Split dashboard layout
   ================================================================ */

/* -- Design Tokens ------------------------------------------------ */
:root {
    --color-bg: #0d0f14;
    --color-surface: #161a24;
    --color-surface-alt: #1d2230;
    --color-text: #dce4f0;
    --color-text-muted: #5a6578;
    --color-accent: #a78bfa;
    --color-accent-glow: rgba(167, 139, 250, 0.15);
    --color-accent-bright: #c4b5fd;
    --color-wood: #8b6914;
    --color-wood-light: #b8922a;
    --color-slot: #2d3348;
    --color-endcorr: rgba(167, 139, 250, 0.25);
    --color-curve: #a78bfa;
    --color-safe: #22c55e;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-target: #f472b6;
    --radius: 8px;
    --radius-lg: 12px;
    --transition: 0.3s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    -webkit-font-smoothing: antialiased;
}

/* -- Header ------------------------------------------------------- */
.app-header { text-align: center; margin-bottom: 1.5rem; }
.app-header h1 { font-size: 1.8rem; font-weight: 700; letter-spacing: 0.02em; }
.app-header .accent { color: var(--color-accent); }
.app-header p { font-size: 0.85rem; color: var(--color-text-muted); margin-top: 0.3rem; }

/* -- Ad Placeholders ---------------------------------------------- */
.ad-placeholder {
    display: flex; align-items: center; justify-content: center;
    border: 2px dashed rgba(90, 101, 120, 0.3);
    background: rgba(0, 0, 0, 0.2);
    color: var(--color-text-muted); font-size: 0.75rem; font-weight: 600;
    margin: 0 auto; width: 100%;
}
.ad-mobile { height: 50px; max-width: 320px; }
.ad-desktop { display: none; height: 90px; max-width: 728px; }

/* -- Main Layout -------------------------------------------------- */
.app-main { width: 100%; max-width: 1200px; display: flex; flex-direction: column; gap: 1rem; }
.dashboard { display: flex; flex-direction: column; gap: 1rem; }

/* -- Sidebar ------------------------------------------------------ */
.sidebar { width: 100%; }

.input-panel {
    background: var(--color-surface);
    border: 1px solid rgba(148, 163, 184, 0.06);
    border-radius: var(--radius-lg);
    padding: 1rem 1.25rem;
    margin-bottom: 0.6rem;
}

.input-panel h2 {
    font-size: 0.75rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.08em; color: var(--color-accent);
    margin-bottom: 0.75rem; padding-bottom: 0.4rem;
    border-bottom: 1px solid rgba(148, 163, 184, 0.06);
}

.input-group { margin-bottom: 0.65rem; }
.input-group label {
    display: block; font-size: 0.75rem; font-weight: 600;
    color: var(--color-text-muted); margin-bottom: 0.2rem;
}

.input-group input[type="number"] {
    width: 100%;
    background: var(--color-surface-alt);
    border: 1px solid rgba(148, 163, 184, 0.1);
    color: var(--color-text);
    padding: 0.55rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    transition: border-color var(--transition);
}

.input-group input[type="number"]:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.help-text {
    display: block; font-size: 0.68rem;
    color: rgba(90, 101, 120, 0.7);
    margin-top: 0.15rem; font-style: italic;
}

/* Range Sliders */
input[type="range"] {
    width: 100%; -webkit-appearance: none; appearance: none;
    height: 5px; background: var(--color-surface-alt);
    border-radius: 3px; outline: none; margin-top: 0.3rem;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none;
    width: 16px; height: 16px; border-radius: 50%;
    background: var(--color-accent); cursor: pointer;
    border: 2px solid var(--color-bg);
    box-shadow: 0 0 6px rgba(167, 139, 250, 0.3);
}

input[type="range"]::-moz-range-thumb {
    width: 16px; height: 16px; border-radius: 50%;
    background: var(--color-accent); cursor: pointer;
    border: 2px solid var(--color-bg);
}

.input-group output {
    display: block; text-align: center;
    font-size: 0.8rem; font-weight: 700;
    color: var(--color-accent); margin-top: 0.15rem;
    font-variant-numeric: tabular-nums;
}

/* Computed Values Panel */
.computed-panel {
    border: 1px solid rgba(167, 139, 250, 0.15);
}

.computed-row {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0.35rem 0;
    border-bottom: 1px solid rgba(148, 163, 184, 0.04);
}

.computed-row:last-child { border-bottom: none; }

.computed-label {
    font-size: 0.72rem; font-weight: 600; color: var(--color-text-muted);
}

.computed-value {
    font-size: 0.82rem; font-weight: 700; color: var(--color-text);
    font-variant-numeric: tabular-nums;
}

/* -- Main View ---------------------------------------------------- */
.main-view { width: 100%; }

.results-strip {
    display: grid; grid-template-columns: repeat(2, 1fr);
    gap: 0.6rem; margin-bottom: 0.75rem;
}

.result-card {
    background: var(--color-surface);
    border: 1px solid rgba(148, 163, 184, 0.06);
    border-radius: var(--radius); padding: 0.75rem; text-align: center;
}

.accent-card {
    border-color: rgba(167, 139, 250, 0.25);
    background: linear-gradient(135deg, var(--color-surface), rgba(167, 139, 250, 0.05));
}

.accent-card .result-value { color: var(--color-accent-bright); font-size: 1.3rem; }

.result-label {
    display: block; font-size: 0.65rem; font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.06em;
    color: var(--color-text-muted); margin-bottom: 0.2rem;
}

.result-value {
    display: block; font-size: 1.1rem; font-weight: 700;
    font-variant-numeric: tabular-nums; color: var(--color-text);
}

.status-card.matched { border-color: var(--color-safe); }
.status-card.matched .result-value { color: var(--color-safe); }
.status-card.close { border-color: var(--color-warning); }
.status-card.close .result-value { color: var(--color-warning); }
.status-card.off { border-color: var(--color-danger); }
.status-card.off .result-value { color: var(--color-danger); }

/* SVG Viewports */
.svg-viewport {
    background: var(--color-surface);
    border: 1px solid rgba(148, 163, 184, 0.06);
    border-radius: var(--radius-lg);
    padding: 0.75rem 1rem;
    margin-bottom: 0.6rem;
    overflow: hidden;
}

.section-title {
    font-size: 0.75rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.06em; color: var(--color-accent);
    margin-bottom: 0.4rem; text-align: center;
}

#blueprintSvg, #qCurveSvg { width: 100%; height: auto; }
#blueprintSvg { min-height: 160px; }
#qCurveSvg { min-height: 200px; }

/* Legend */
.legend {
    display: flex; flex-wrap: wrap; gap: 0.75rem;
    justify-content: center; margin-top: 0.5rem; padding: 0.5rem;
}

.legend-item {
    display: flex; align-items: center; gap: 0.35rem;
    font-size: 0.72rem; color: var(--color-text-muted); font-weight: 500;
}

.legend-swatch { width: 14px; height: 10px; border-radius: 2px; }
.slat-swatch { background: var(--color-wood); }
.gap-swatch { background: var(--color-slot); border: 1px dashed rgba(148,163,184,0.2); }
.ec-swatch { background: var(--color-endcorr); }
.curve-swatch { background: var(--color-curve); }

.legend-line {
    width: 18px; height: 2px; border-radius: 1px;
}
.target-line { background: var(--color-target); }

/* -- Footer ------------------------------------------------------- */
.app-footer {
    margin-top: 2rem; text-align: center;
    font-size: 0.75rem; color: var(--color-text-muted);
}

/* ================================================================
   RESPONSIVE — Desktop
   ================================================================ */
@media (min-width: 768px) {
    .ad-mobile { display: none; }
    .ad-desktop { display: flex; }

    .dashboard { flex-direction: row; align-items: flex-start; }

    .sidebar {
        width: 300px; flex-shrink: 0;
        max-height: calc(100vh - 6rem);
        overflow-y: auto;
        scrollbar-width: thin;
        scrollbar-color: var(--color-accent) var(--color-surface);
    }

    .sidebar::-webkit-scrollbar { width: 5px; }
    .sidebar::-webkit-scrollbar-track { background: var(--color-surface); }
    .sidebar::-webkit-scrollbar-thumb { background: var(--color-accent); border-radius: 3px; }

    .main-view { flex: 1; min-width: 0; }
    .results-strip { grid-template-columns: repeat(4, 1fr); }
}

/* ═══════════════ AFFILIATE & SEO ═══════════════ */
.seo-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin: 2rem 0;
}
.seo-card h2 {
    color: var(--color-accent);
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}
.seo-card p {
    color: var(--color-text-muted);
    line-height: 1.6;
}
.affiliate-gear a {
    color: var(--color-accent);
    font-weight: 600;
    text-decoration: none;
}
.affiliate-gear a:hover {
    color: var(--color-text);
    text-decoration: underline;
}