/* === Virtual Qubit Showdown — Styles === */

:root {
    --bg: #050510;
    --bg-alt: #0a0a1e;
    --bg-card: #111827;
    --bg-panel: #0f1724;
    --text: #e2e8f0;
    --text-dim: #94a3b8;
    --accent: #06b6d4;
    --accent2: #8b5cf6;
    --alive: #10b981;
    --error: #ef4444;
    --warn: #f59e0b;
    --flash: #22d3ee;
    --border: #1e293b;
    --radius: 8px;
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --mono: 'Consolas', 'Cascadia Code', 'Fira Code', monospace;
}

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

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

#app { display: flex; flex-direction: column; height: 100vh; }

/* ===== HEADER ===== */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background: linear-gradient(135deg, #0f172a, #1a1040, #0f172a);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
.header-left h1 {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(90deg, var(--flash), var(--alive));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.subtitle { font-size: 0.7rem; color: var(--text-dim); margin-top: 1px; }
.badge {
    font-size: 0.65rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 4px 10px;
    border-radius: 12px;
    color: var(--text-dim);
}

/* ===== MAIN LAYOUT ===== */
#main-layout {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* ===== SIDEBAR ===== */
#sidebar {
    width: 260px;
    min-width: 260px;
    background: var(--bg-panel);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px;
}
.panel h3 {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-dim);
    margin-bottom: 8px;
    font-weight: 600;
}

/* Mode tabs */
.mode-tabs { display: flex; gap: 3px; }
.mode-btn {
    flex: 1;
    padding: 6px 3px;
    font-size: 0.65rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg);
    color: var(--text-dim);
    cursor: pointer;
    transition: all 0.15s;
}
.mode-btn.active {
    background: var(--accent);
    color: #000;
    border-color: var(--accent);
    font-weight: 600;
}
.mode-btn:hover:not(.active) { border-color: var(--accent); color: var(--text); }

/* Parameters */
.param-row { margin-bottom: 8px; }
.param-row label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-dim);
    margin-bottom: 2px;
}
.param-row label em { color: var(--accent); }
.slider-row { display: flex; align-items: center; gap: 8px; }
.slider-row input[type=range] {
    flex: 1;
    -webkit-appearance: none;
    height: 5px;
    background: var(--border);
    border-radius: 3px;
    outline: none;
}
.slider-row input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px; height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: 2px solid var(--flash);
    box-shadow: 0 0 6px rgba(6,182,212,0.4);
}
.slider-row span {
    font-family: var(--mono);
    font-weight: 700;
    color: var(--flash);
    min-width: 32px;
    font-size: 0.8rem;
}
input[type=number] {
    width: 60px;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 4px;
    border-radius: 4px;
    font-family: var(--mono);
    font-size: 0.75rem;
}

.stats-mini { font-size: 0.7rem; color: var(--text-dim); margin-top: 6px; }
.stats-mini strong { color: var(--accent); font-family: var(--mono); }

/* Action buttons */
.act-btn {
    display: block;
    width: 100%;
    padding: 7px 10px;
    margin-bottom: 5px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--text);
    cursor: pointer;
    font-size: 0.75rem;
    transition: all 0.15s;
    text-align: left;
    font-family: var(--font);
}
.act-btn:hover { transform: translateX(2px); }
.act-btn.primary { border-color: var(--accent); color: var(--accent); }
.act-btn.primary:hover { background: var(--accent); color: #000; }
.act-btn.warn { border-color: var(--warn); color: var(--warn); }
.act-btn.warn:hover { background: var(--warn); color: #000; }
.act-btn.accent { border-color: var(--alive); color: var(--alive); }
.act-btn.accent:hover { background: var(--alive); color: #000; }
.act-btn.accent2 { border-color: var(--accent2); color: var(--accent2); }
.act-btn.accent2:hover { background: var(--accent2); color: #fff; }
.act-btn.dim { color: var(--text-dim); }
.act-btn.dim:hover { background: var(--bg-card); }

/* Results */
#results-content { font-size: 0.7rem; font-family: var(--mono); }
.result-row { margin-bottom: 3px; }
.result-row strong { color: var(--flash); }
.dim-text { color: var(--text-dim); }

/* Legend */
.legend { display: flex; flex-direction: column; gap: 4px; font-size: 0.7rem; }
.leg-item { display: flex; align-items: center; gap: 6px; }
.dot { width: 10px; height: 10px; border-radius: 3px; display: inline-block; flex-shrink: 0; }

/* ===== VIZ PANELS ===== */
.viz-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: radial-gradient(ellipse at center, #0f1724 0%, #020617 100%);
    position: relative;
    overflow: hidden;
    min-width: 0;
}
.panel-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-panel);
    flex-shrink: 0;
}
.panel-header h2 { font-size: 0.85rem; font-weight: 600; }
.panel-icon { font-size: 1.1rem; }
.panel-badge {
    font-size: 0.6rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 2px 8px;
    border-radius: 10px;
    color: var(--text-dim);
    margin-left: auto;
}
.panel-footer {
    padding: 6px 14px;
    border-top: 1px solid var(--border);
    background: var(--bg-panel);
    font-size: 0.75rem;
    font-family: var(--mono);
    color: var(--text-dim);
    flex-shrink: 0;
}
.panel-footer span { font-weight: 700; }

#tree-svg, #grid-svg { flex: 1; width: 100%; }

/* ===== CENTER DIVIDER ===== */
.center-divider {
    width: 50px;
    min-width: 50px;
    background: var(--bg-card);
    border-left: 1px solid var(--border);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 16px 0;
}
.divider-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    width: 100%;
}
.vs-badge {
    font-size: 0.8rem;
    font-weight: 900;
    color: var(--text-dim);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.flash-msg {
    font-size: 0.6rem;
    text-align: center;
    padding: 4px 6px;
    border-radius: 4px;
    transition: opacity 0.3s;
    max-width: 44px;
    overflow: hidden;
    word-wrap: break-word;
}
.flash-info { background: rgba(6,182,212,0.2); border: 1px solid var(--accent); color: var(--accent); }
.flash-warn { background: rgba(245,158,11,0.2); border: 1px solid var(--warn); color: var(--warn); }
.flash-error { background: rgba(239,68,68,0.2); border: 1px solid var(--error); color: var(--error); }
.flash-success { background: rgba(16,185,129,0.2); border: 1px solid var(--alive); color: var(--alive); }

.comp-stats {
    font-size: 0.6rem;
    font-family: var(--mono);
    width: 100%;
    text-align: center;
}
.comp-row {
    display: flex;
    justify-content: space-between;
    padding: 2px 6px;
    color: var(--text-dim);
}
.comp-row.highlight { color: var(--flash); font-weight: 600; }

/* ===== TOOLTIP ===== */
.qbtooltip {
    position: absolute;
    background: var(--bg-card);
    border: 1px solid var(--accent);
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 0.65rem;
    font-family: var(--mono);
    color: var(--text);
    pointer-events: none;
    box-shadow: 0 4px 16px rgba(0,0,0,0.5);
    z-index: 100;
    max-width: 220px;
}
.qbtooltip .tt-title { color: var(--flash); font-weight: 600; margin-bottom: 3px; }

/* ===== SVG ELEMENTS ===== */
.tcircle {
    cursor: pointer;
    transition: all 0.2s;
}
.tcircle:hover { filter: brightness(1.4); }
.tcircle.error-flash { animation: err-pulse 0.8s ease-in-out infinite; }
.tcircle.propagate-flash { animation: prop-pulse 0.6s ease-in-out infinite; }
@keyframes err-pulse {
    0%, 100% { stroke-opacity: 1; }
    50% { stroke-opacity: 0.3; }
}
@keyframes prop-pulse {
    0%, 100% { stroke-opacity: 1; stroke-width: 3; }
    50% { stroke-opacity: 0.4; stroke-width: 1.5; }
}

.tree-edge { stroke: #1e293b; stroke-width: 1.5; }

.grid-edge { stroke-width: 1; }
.gq-rect { cursor: pointer; transition: all 0.15s; }
.gq-rect:hover { filter: brightness(1.3); }

/* ===== FOOTER ===== */
footer {
    background: var(--bg-panel);
    border-top: 1px solid var(--border);
    padding: 6px 16px;
    text-align: center;
    font-size: 0.65rem;
    color: var(--text-dim);
    flex-shrink: 0;
}
footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
    #sidebar { width: 220px; min-width: 220px; }
    .center-divider { width: 36px; min-width: 36px; }
}