/* — Reset & Variables — */
:root {
    --bg: #07090e;
    --panel: #11141e;
    --panel-2: #161b29;
    --border: #202638;
    --border-hover: #333d59;
    --text: #e1e7f5;
    --muted: #828fa9;
    
    /* Premium Gradients */
    --accent-1: #7c9cff; /* Soft Indigo */
    --accent-2: #ff6d9c; /* Pink Red */
    --gradient: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    
    --ok: #4ddb9f;
    --err: #ff6e6e;
    --warn: #ffcc4d;
    --mono: "JetBrains Mono", ui-monospace, monospace;
    --sans: "Inter", -apple-system, system-ui, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    line-height: 1.6;
    overflow-x: hidden;
}

/* — Custom Scrollbars — */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg);
}
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}

/* — Page Container — */
.page-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* — Hero Section — */
.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 80px 20px 60px;
    position: relative;
}

.hero-content {
    max-width: 800px;
    margin-bottom: 40px;
}

.badge {
    display: inline-block;
    background: rgba(124, 156, 255, 0.12);
    border: 1px solid rgba(124, 156, 255, 0.3);
    color: var(--accent-1);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 20px;
}

.hero h1 {
    font-size: 52px;
    font-weight: 850;
    letter-spacing: -1px;
    line-height: 1.1;
    margin-bottom: 20px;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero .subtitle {
    font-size: 18px;
    color: var(--muted);
    font-weight: 400;
    margin-bottom: 30px;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
}

/* — Buttons — */
.btn {
    background: var(--panel);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn:hover {
    border-color: var(--accent-1);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(124, 156, 255, 0.15);
}

.btn.primary {
    background: var(--gradient);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 4px 16px rgba(255, 109, 156, 0.2);
}

.btn.primary:hover {
    filter: brightness(1.1);
    box-shadow: 0 6px 20px rgba(255, 109, 156, 0.3);
}

.btn.secondary {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.08);
}

.btn.secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--muted);
}

.btn.danger:hover {
    border-color: var(--err);
    color: var(--err);
    box-shadow: 0 4px 12px rgba(255, 110, 110, 0.15);
}

/* — Hero Graphic — */
.hero-graphic {
    width: 100%;
    max-width: 900px;
    position: relative;
    padding: 20px;
}

.led-strip-glow {
    position: absolute;
    top: 50%;
    left: 5%;
    right: 5%;
    height: 12px;
    transform: translateY(-50%);
    background: linear-gradient(90deg, #f00, #ff0, #0f0, #0ff, #00f, #f0f, #f00);
    filter: blur(24px);
    opacity: 0.45;
    pointer-events: none;
    border-radius: 10px;
}

.led-strip-preview {
    background: #000;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 10px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
}

.led-strip-preview canvas {
    width: 100%;
    height: 12px;
    border-radius: 6px;
    image-rendering: pixelated;
}

/* — Top Row: Summary & Simulator — */
.summary-sim-row {
    display: flex;
    gap: 40px;
    margin-top: 40px;
    align-items: stretch;
}

.summary-column {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.summary-column .doc-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.simulator-column {
    width: 500px;
    flex-shrink: 0;
}

@media (max-width: 1100px) {
    .summary-sim-row {
        flex-direction: column;
        align-items: stretch;
    }
    .simulator-column {
        width: 100%;
    }
}

/* — Tech Docs & Bottom Column — */
.bottom-docs-column {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin-top: 40px;
}

/* Ember glow — animated gradient border via pseudo-element */
.doc-card {
    position: relative;
    background: var(--panel);
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    /* hide native border; the glow pseudo-element handles it */
    border: 1px solid transparent;
    z-index: 0;
}

.doc-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: 17px; /* 1px larger than card */
    background: conic-gradient(
        from var(--_angle, 0deg),
        var(--accent-2),
        var(--accent-1),
        #4fd9ff,
        var(--accent-1),
        var(--accent-2)
    );
    z-index: -1;
    opacity: 0;
    transition: opacity 0.4s ease;
    animation: ember-spin 6s linear infinite paused;
}

.doc-card:hover::before {
    opacity: 1;
    animation-play-state: running;
}

/* After: a slightly inset fill so the card background shows through */
.doc-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 15px;
    background: var(--panel);
    z-index: -1;
}

/* Ensure content sits above the ::after fill */
.doc-card > * {
    position: relative;
    z-index: 1;
}

@property --_angle {
    syntax: '<angle>';
    initial-value: 0deg;
    inherits: false;
}

@keyframes ember-spin {
    to { --_angle: 360deg; }
}

/* Summary column card always shows a subtle static border glow */
.summary-column .doc-card::before {
    opacity: 0.35;
    animation-play-state: running;
    animation-duration: 10s;
}

.summary-column .doc-card:hover::before {
    opacity: 0.75;
    animation-duration: 4s;
}

.doc-card h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 20px;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    border-bottom: 1px solid var(--border);
    padding-bottom: 10px;
}

.doc-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin: 24px 0 12px;
    color: var(--accent-1);
}

.doc-card p {
    color: var(--muted);
    font-size: 15px;
    margin-bottom: 16px;
    line-height: 1.7;
}

.doc-card p strong {
    color: var(--text);
}

.doc-card ol, .doc-card ul {
    margin-left: 20px;
    margin-bottom: 16px;
    color: var(--muted);
    font-size: 15px;
}

.doc-card li {
    margin-bottom: 8px;
}

/* — Tech Table — */
.tech-table-wrapper {
    overflow-x: auto;
    margin-top: 20px;
    border: 1px solid var(--border);
    border-radius: 8px;
    position: relative;
    z-index: 1; /* ensure it stays above the ::after fill */
}

.tech-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    text-align: left;
    background: var(--panel-2);
}

.tech-table th, .tech-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

/* Ember (last) column highlight */
.tech-table thead th:last-child {
    background: rgba(124, 156, 255, 0.08);
    color: var(--accent-1);
    border-left: 2px solid rgba(124, 156, 255, 0.3);
}

.tech-table tbody td:last-child {
    background: rgba(124, 156, 255, 0.04);
    border-left: 2px solid rgba(124, 156, 255, 0.15);
    color: var(--text);
}


.tech-table th {
    background: var(--panel);
    font-weight: 600;
    color: #fff;
}

.tech-table td {
    color: var(--muted);
}

.tech-table tr:last-child td {
    border-bottom: 0;
}

/* — Diagram Container — */
.diagram-container {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
}

.bytecode-flow {
    display: flex;
    align-items: center;
    font-family: var(--mono);
    font-size: 12px;
    white-space: nowrap;
    gap: 8px;
    color: var(--muted);
}

.bytecode-flow .box {
    border: 1px solid var(--border);
    background: var(--panel);
    padding: 6px 12px;
    border-radius: 6px;
    color: var(--text);
}

.bytecode-flow .box.compiler { border-color: var(--accent-1); color: var(--accent-1); }
.bytecode-flow .box.bytecode { border-color: var(--accent-2); color: var(--accent-2); }
.bytecode-flow .box.vm { border-color: var(--ok); color: var(--ok); }

/* — Right Column: Captive Portal Simulator — */
.simulator-column {
    position: relative;
}

.simulator-sticky {
    position: sticky;
    top: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sim-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--panel);
    border: 1px solid var(--border);
    padding: 12px 18px;
    border-radius: 12px;
}

.sim-title {
    display: flex;
    align-items: center;
    gap: 10px;
}

.sim-title h2 {
    font-size: 15px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #fff;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--muted);
}

.dot.live {
    background: var(--accent-2);
    box-shadow: 0 0 10px var(--accent-2);
}

.dot.blinking {
    animation: blink 1.5s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.btn-audio-mic {
    background: var(--panel-2);
    border-color: var(--border);
    padding: 6px 12px;
    font-size: 12px;
    border-radius: 6px;
}

.btn-audio-mic.active {
    background: var(--accent-2);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 0 10px rgba(255, 109, 156, 0.4);
}

/* — Virtual LED Chassis — */
.virtual-strip-chassis {
    background: #000;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 16px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.6);
}

.strip-header {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--muted);
    margin-bottom: 12px;
    font-weight: 600;
}

.sim-fps {
    font-family: var(--mono);
    color: var(--ok);
}

.led-viewport {
    background: #050505;
    border: 1px solid #111;
    border-radius: 8px;
    padding: 12px;
    position: relative;
    box-shadow: 0 4px 12px rgba(0,0,0,0.5) inset;
}

.led-viewport canvas {
    width: 100%;
    height: 24px;
    border-radius: 4px;
    image-rendering: pixelated;
}

.strip-footer {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: var(--muted);
    margin-top: 8px;
    font-family: var(--mono);
}

/* — Captive Portal Chassis — */
.portal-container {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
    display: flex;
    flex-direction: column;
}

.portal-header {
    display: flex;
    align-items: center;
    padding: 0 16px;
    height: 48px;
    background: var(--panel-2);
    border-bottom: 1px solid var(--border);
    gap: 12px;
}

.portal-logo {
    font-weight: 800;
    font-size: 13px;
    letter-spacing: 0.5px;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.portal-crumb {
    font-size: 11px;
    color: var(--muted);
}

.portal-crumb b {
    color: var(--text);
}

.portal-status {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    color: var(--muted);
}

.portal-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--ok);
    box-shadow: 0 0 6px var(--ok);
}

.portal-body {
    display: grid;
    grid-template-columns: 1fr;
    min-height: 0;
}

/* — Editor Section — */
.portal-main {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.editor-container {
    position: relative;
    height: 220px;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    background: #0d0f14;
    box-shadow: 0 4px 16px rgba(0,0,0,0.3) inset;
}

.editor-container .gutter {
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 36px;
    border-right: 1px solid var(--border);
    background: #11141a;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 11px;
    text-align: right;
    padding: 10px 6px 10px 0;
    line-height: 1.5;
    user-select: none;
    overflow: hidden;
    pointer-events: none;
}

.editor-container .layer {
    position: absolute;
    left: 36px; top: 0; right: 0; bottom: 0;
    margin: 0;
    padding: 10px 12px;
    font-family: var(--mono);
    font-size: 12px;
    line-height: 1.5;
    white-space: pre;
    overflow: auto;
    border: 0;
    color: var(--text);
    background: transparent;
    tab-size: 4;
    -moz-tab-size: 4;
}

.editor-container .hl {
    pointer-events: none;
    color: transparent;
}

.editor-container .hl .kw  { color: #c792ea; }
.editor-container .hl .fn  { color: #82aaff; }
.editor-container .hl .num { color: #f78c6c; }
.editor-container .hl .var { color: #ffcb6b; }
.editor-container .hl .cmt { color: #5c6370; font-style: italic; }
.editor-container .hl .op  { color: #89ddff; }
.editor-container textarea {
    color: transparent;
    caret-color: var(--text);
    background: transparent;
    resize: none;
    outline: none;
}
.editor-container textarea::selection {
    background: rgba(124, 156, 255, 0.25);
}

.err {
    color: var(--err);
    font-family: var(--mono);
    font-size: 11px;
    min-height: 16px;
    line-height: 1.4;
    padding: 0 4px;
}
.err.ok {
    color: var(--ok);
}

.portal-actions {
    display: flex;
    gap: 8px;
}

.portal-actions input[type=text] {
    flex: 1;
    background: var(--panel-2);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 12px;
}

.portal-actions input[type=text]:focus {
    outline: none;
    border-color: var(--accent-1);
}

.portal-actions .btn {
    padding: 6px 14px;
    font-size: 12px;
    border-radius: 6px;
}

/* — Sidebar Column — */
.portal-sidebar {
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    background: var(--panel-2);
}

.tabbar {
    display: flex;
    border-bottom: 1px solid var(--border);
    padding: 0 8px;
    background: var(--panel);
}

.tab {
    background: none;
    border: none;
    color: var(--muted);
    padding: 10px 12px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.15s;
}

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

.tab.active {
    color: var(--text);
    border-bottom-color: var(--accent-1);
}

.tab-content {
    padding: 14px;
    height: 180px;
    overflow-y: auto;
}

.tab-content h3 {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--muted);
    margin-bottom: 10px;
}

.tab-content .cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.tab-content .card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 8px;
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.tab-content .card:hover {
    border-color: var(--accent-1);
    transform: translateY(-1px);
}

.tab-content .card .name {
    font-size: 11px;
    font-weight: 600;
    color: var(--text);
}

.tab-content .card canvas {
    border-radius: 2px;
    image-rendering: pixelated;
    background: #000;
}

.tab-content .card .tags {
    display: flex;
    gap: 2px;
}

.tab-content .card .tag {
    font-size: 8px;
    background: var(--panel-2);
    color: var(--muted);
    padding: 0 4px;
    border-radius: 4px;
}

.tab-content .saved {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.tab-content .chip {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2px 8px;
    font-size: 11px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.tab-content .chip:hover {
    border-color: var(--accent-1);
}

.tab-content .chip .x {
    color: var(--muted);
    width: 12px; height: 12px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%;
}

.tab-content .chip .x:hover {
    background: var(--err);
    color: #fff;
}

/* — Settings Layout — */
.tab-content .row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.tab-content .row label {
    flex: 1;
    font-size: 11px;
    color: var(--muted);
}

.tab-content .row input[type=range] {
    flex: 1.2;
    accent-color: var(--accent-1);
}

.tab-content .row .val {
    font-family: var(--mono);
    font-size: 11px;
    min-width: 32px;
    text-align: right;
}

.tab-content .row select, .tab-content .row input[type=number] {
    background: var(--panel);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 4px 6px;
    border-radius: 4px;
    font-size: 11px;
}

.tab-content .row select:focus, .tab-content .row input[type=number]:focus {
    outline: none;
    border-color: var(--accent-1);
}

.tab-content .hint {
    font-size: 10px;
    color: var(--muted);
    line-height: 1.4;
    margin-top: 8px;
}

.tab-content code {
    font-family: var(--mono);
    color: var(--accent-2);
}

/* — Real-Time Spectrum Visualizer — */
.bars-container {
    display: flex;
    align-items: flex-end;
    gap: 3px;
    height: 48px;
    background: #0d0f14;
    border-radius: 6px;
    padding: 4px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3) inset;
}

.bars-container .bar {
    flex: 1;
    background: linear-gradient(to top, var(--accent-1), var(--accent-2));
    border-radius: 1.5px;
    transition: height 0.08s ease-out;
}

.freq-labels {
    display: flex;
    justify-content: space-between;
    font-size: 9px;
    color: var(--muted);
    margin-top: 2px;
}