/* ============================================================
   layout.css
   General layout: reset, body, container, header, controls,
   stats, stat cards, loading, error, footer.
   Also includes the first responsive @media block.
   ============================================================ */

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

html {
    zoom: 1.125;
}

/* ── First responsive @media block ── */
@media (max-width: 768px) {
    html { zoom: 0.9; }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-body);
    color-scheme: var(--color-scheme);
    text-shadow: var(--text-shadow-body);
    min-height: 100vh;
    padding: 20px;
    transition: background 0.3s ease, color 0.3s ease;
}

.container { max-width: 1400px; margin: 0 auto; position: relative; z-index: 1; }

#matrix-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

header {
    margin-bottom: 15px;
    padding-top: 20px;
    padding-bottom: 15px;
}

h1 {
    font-family: 'Cinzel', serif;
    font-weight: 400;
    color: var(--title-color);
    margin-bottom: 8px;
    letter-spacing: 12px;
    text-shadow: var(--text-shadow-title);
}
h1 .title-main {
    font-size: 2.6rem;
    display: block;
    padding-bottom: 4px;
}
h1 .title-divider {
    display: block;
    width: 60%;
    max-width: 280px;
    height: 1px;
    background: var(--title-divider);
    margin: 0 auto;
}
h1 .title-sub {
    font-size: 1.1rem;
    display: block;
    color: var(--title-sub);
    letter-spacing: 10px;
    font-weight: 400;
    padding-top: 10px;
}
h2 { font-size: 1.2rem; color: var(--accent-blue); font-family: 'SF Mono', Monaco, monospace; display: flex; align-items: center; gap: 10px; }
h2 .count { font-size: 0.85rem; color: var(--text-muted); font-weight: normal; }

.subtitle { color: var(--text-muted); font-size: 0.9rem; }

.constraints { display: flex; gap: 20px; margin-top: 15px; font-size: 0.8rem; }
.constraint { background: var(--bg-card); padding: 6px 12px; border-radius: 4px; border: 1px solid var(--border-subtle); }

.controls { display: flex; gap: 15px; margin-bottom: 20px; flex-wrap: wrap; align-items: center; }
.control-group { display: flex; align-items: center; gap: 8px; }

label { font-size: 0.85rem; color: var(--text-muted); }

input[type="date"], select {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 0.9rem;
}

select[multiple] {
    min-height: 120px;
    min-width: 200px;
}

button {
    background: var(--bg-card);
    color: var(--accent-blue-muted);
    border: 1px solid var(--border-subtle);
    padding: 7px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    font-family: 'SF Mono', Monaco, monospace;
    transition: all 0.25s ease;
    box-shadow: 0 0 4px var(--glow-blue-soft);
}

button:hover {
    background: var(--bg-secondary);
    border-color: var(--border-medium);
    color: var(--accent-blue-softer);
    box-shadow: 0 0 8px var(--glow-blue), inset 0 0 6px rgba(96, 165, 250, 0.04);
}
button:disabled { background: var(--bg-disabled); border-color: var(--border-subtle); color: var(--text-disabled); cursor: not-allowed; box-shadow: none; }
button.secondary { background: var(--bg-card); }
button.secondary:hover {
    border-color: var(--border-medium);
    color: var(--accent-blue-softer);
    box-shadow: 0 0 8px var(--glow-blue), inset 0 0 6px rgba(96, 165, 250, 0.04);
}

#fetch-range-btn {
    border-color: var(--border-medium);
    box-shadow: 0 0 8px var(--glow-blue), inset 0 0 8px rgba(96, 165, 250, 0.05);
    color: var(--accent-blue-soft);
}
#fetch-range-btn:hover {
    border-color: var(--border-strong);
    box-shadow: 0 0 14px var(--glow-blue-strong), inset 0 0 10px rgba(96, 165, 250, 0.08);
    color: var(--accent-blue-pale);
}

.strike-filter-bar {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
    width: 100%;
    padding: 0 4px 8px;
}
button.filter-toggle {
    font-size: 0.7rem;
    padding: 2px 10px;
    height: 25px;
    opacity: 0.45;
    transition: all 0.25s ease;
}
button.filter-toggle.active {
    opacity: 1;
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    box-shadow: 0 0 8px var(--glow-blue), inset 0 0 6px rgba(96, 165, 250, 0.08);
}

.stat-card {
    background: var(--bg-card);
    padding: 15px;
    border-radius: 6px;
    border: 1px solid var(--border-subtle);
    text-align: center;
}

.stat-value {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--accent-blue-bright);
    font-family: 'SF Mono', Monaco, monospace;
    animation: icyPulse 3s ease-in-out infinite;
}
.stat-value.call-color { color: var(--call-stat); animation: icyPulseGreen 3s ease-in-out infinite; }
.stat-value.put-color { color: var(--put-stat); animation: icyPulseRed 3s ease-in-out infinite; }
.stat-value.ratio-color { color: var(--accent-blue-bright); animation: icyPulse 3s ease-in-out infinite; }

.stat-label {
    font-size: 0.75rem;
    color: var(--text-body);
    margin-top: 4px;
    text-transform: lowercase;
    font-family: 'SF Mono', Monaco, monospace;
}

.call { color: var(--call-color); }
.put { color: var(--put-color); }
.volume { font-family: 'SF Mono', Monaco, monospace; color: var(--accent-blue); }
.strike { font-family: 'SF Mono', Monaco, monospace; }

.loading { text-align: center; padding: 40px; color: var(--text-muted); }

.error {
    background: var(--bg-error);
    border: 1px solid var(--put-color);
    color: var(--put-color);
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 20px;
}

footer {
    margin-top: 40px;
    padding-top: 20px;
    text-align: center;
    color: var(--text-dim);
    font-size: 0.8rem;
}