@import url('https://fonts.googleapis.com/css2?family=Geist+Mono:wght@400;500&family=Anybody:wght@400;700;900&display=swap');

/* --- Design Tokens --- */
:root {
    /* Brand: warm amber + cool slate — NOT cyan-on-dark */
    --brand: oklch(0.75 0.15 70);        /* amber */
    --brand-dim: oklch(0.55 0.10 70);    /* muted amber */
    --brand-bright: oklch(0.85 0.18 70); /* bright amber */
    --active: oklch(0.72 0.14 155);      /* teal-green for active status */
    --active-dim: oklch(0.45 0.06 155);
    --error: oklch(0.65 0.18 25);        /* coral for errors */
    --listening: oklch(0.70 0.12 250);   /* soft blue for listening */

    /* Surfaces — tinted toward amber */
    --bg: oklch(0.13 0.015 70);
    --bg-raised: oklch(0.16 0.015 70);
    --bg-panel: oklch(0.11 0.01 70);

    /* Text — warm neutrals */
    --text: oklch(0.87 0.02 70);
    --text-secondary: oklch(0.62 0.03 70);  /* WCAG AA on --bg */
    --text-muted: oklch(0.50 0.02 70);

    /* Borders */
    --border: oklch(0.25 0.02 70);
    --border-focus: var(--brand);

    /* Spacing (4pt scale) */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
}

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

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* --- Base --- */
body {
    font-family: 'Geist Mono', ui-monospace, monospace;
    font-size: 13px;
    line-height: 1.6;
    background: var(--bg);
    color: var(--text);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* --- Header --- */
.header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    gap: var(--space-md);
    padding: 10px var(--space-md);
    background: var(--bg-raised);
    border-bottom: 1px solid var(--border);
    z-index: 5;
}

.header h1 {
    font-family: 'Anybody', sans-serif;
    font-weight: 900;
    font-size: 18px;
    color: var(--brand);
    letter-spacing: 4px;
    text-transform: uppercase;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    justify-self: end;
}

/* --- Status Indicator --- */
.status {
    font-size: 12px;
    color: var(--text-muted);
    padding: 2px var(--space-sm);
    display: flex;
    align-items: center;
    gap: 6px;
}

.status::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
    display: inline-block;
}

.status-idle { color: var(--text-secondary); }
.status-idle::before { background: var(--active); }

.status-listening { color: var(--listening); }
.status-listening::before {
    background: var(--listening);
    animation: pulse-dot 1.2s ease-in-out infinite;
}

.status-speaking { color: var(--brand); }
.status-speaking::before {
    background: var(--brand);
    animation: pulse-dot 0.6s ease-in-out infinite;
}

.status-disconnected { color: var(--text-muted); }
.status-disconnected::before { background: var(--text-muted); }

.status-error { color: var(--error); }
.status-error::before { background: var(--error); }

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

/* --- Buttons --- */
.btn {
    padding: 6px var(--space-md);
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    font-family: inherit;
    font-size: 12px;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.btn:hover:not(:disabled) {
    background: var(--bg-raised);
    border-color: var(--brand-dim);
}

.btn:active:not(:disabled) {
    background: oklch(0.20 0.02 70);
}

.btn:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 2px;
}

.btn:disabled {
    opacity: 0.4;
    cursor: default;
}

.btn-primary {
    border-color: var(--brand-dim);
    color: var(--brand);
}

.btn-primary:hover:not(:disabled) {
    border-color: var(--brand);
    background: oklch(0.18 0.04 70);
}

.btn-sm {
    padding: 4px 10px;
    font-size: 10px;
    letter-spacing: 1.5px;
    font-weight: 500;
    text-transform: uppercase;
}

.btn-danger {
    border-color: oklch(0.40 0.08 25);
    color: var(--error);
}

.btn-danger:hover:not(:disabled) {
    background: oklch(0.15 0.04 25);
    border-color: var(--error);
}

/* --- Graph Container --- */
#graphContainer {
    flex: 1;
    position: relative;
    min-height: 0;
    overflow: hidden;
    padding: clamp(24px, 4vw, 40px) clamp(18px, 3vw, 36px) clamp(18px, 2.8vw, 28px);
    background:
        linear-gradient(180deg, color-mix(in oklch, var(--bg) 84%, black 16%) 0%, transparent 18%, transparent 100%),
        linear-gradient(180deg, transparent 0%, color-mix(in oklch, var(--brand-dim) 10%, transparent 90%) 56%, transparent 100%);
}

#graphContainer::before {
    content: '';
    position: absolute;
    inset: clamp(16px, 2vw, 24px) clamp(14px, 2.2vw, 28px) clamp(18px, 2.2vw, 24px);
    border: 1px solid color-mix(in oklch, var(--brand-dim) 22%, var(--border) 78%);
    background:
        linear-gradient(180deg, color-mix(in oklch, var(--bg-raised) 56%, transparent 44%) 0%, transparent 12%),
        linear-gradient(180deg, transparent 0%, color-mix(in oklch, var(--brand-dim) 5%, transparent 95%) 100%);
    box-shadow:
        inset 0 1px 0 color-mix(in oklch, var(--brand-bright) 10%, transparent 90%),
        inset 0 -28px 54px color-mix(in oklch, black 55%, transparent 45%);
    pointer-events: none;
}

#graphContainer::after {
    content: '';
    position: absolute;
    left: clamp(28px, 4vw, 56px);
    right: clamp(28px, 4vw, 56px);
    top: clamp(20px, 2.8vw, 30px);
    height: 1px;
    background: linear-gradient(90deg, transparent, color-mix(in oklch, var(--brand-dim) 55%, transparent 45%), transparent);
    opacity: 0.55;
    pointer-events: none;
}

#graphContainer canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.scene-meta {
    position: absolute;
    top: clamp(34px, 4vw, 54px);
    left: clamp(30px, 4vw, 52px);
    max-width: min(36ch, 42vw);
    z-index: 2;
    display: grid;
    gap: 10px;
    pointer-events: none;
}

.scene-kicker {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: 4px 10px;
    border: 1px solid color-mix(in oklch, var(--brand-dim) 38%, var(--border) 62%);
    color: var(--brand);
    background: color-mix(in oklch, var(--bg-raised) 72%, transparent 28%);
    font-size: 10px;
    letter-spacing: 2.2px;
    text-transform: uppercase;
}

.scene-meta p {
    color: color-mix(in oklch, var(--text-secondary) 82%, var(--text) 18%);
    font-size: 12px;
    line-height: 1.7;
    text-wrap: balance;
}

.graph-tooltip {
    position: absolute;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    padding: var(--space-sm) 12px;
    font-size: 12px;
    color: var(--text);
    pointer-events: none;
    z-index: 5;
    max-width: 260px;
    line-height: 1.6;
}

.graph-tooltip strong {
    color: var(--brand);
    font-family: 'Anybody', sans-serif;
    font-weight: 700;
    font-size: 13px;
}

/* --- Chat Panel --- */
#chatPanel {
    height: clamp(180px, 23vh, 220px);
    min-height: 120px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    background: var(--bg-panel);
    position: relative;
    box-shadow: inset 0 1px 0 color-mix(in oklch, var(--brand-dim) 8%, transparent 92%);
}

/* Resize handle */
.chat-resize-handle {
    position: absolute;
    top: -3px;
    left: 0;
    right: 0;
    height: 6px;
    cursor: ns-resize;
    z-index: 6;
}

.chat-resize-handle:hover {
    background: var(--brand-dim);
    opacity: 0.3;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 14px var(--space-md) 18px;
    font-size: 13px;
    line-height: 1.7;
}

.chat-messages::-webkit-scrollbar {
    width: 4px;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.chat-msg {
    margin-bottom: 6px;
    max-width: 88ch;
}

.chat-msg-user {
    color: var(--text-secondary);
}

.chat-msg-ai {
    color: var(--brand-bright);
}

/* Empty state */
.chat-empty {
    color: var(--text-muted);
    font-size: 12px;
    padding: var(--space-lg) 0;
    max-width: 92ch;
    display: grid;
    gap: 10px;
    line-height: 1.75;
}

.chat-empty p {
    margin: 0;
}

.chat-empty kbd {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    padding: 1px 5px;
    font-family: inherit;
    font-size: 11px;
}

.chat-input-area {
    display: flex;
    align-items: center;
    padding: 12px var(--space-md) 14px;
    gap: var(--space-sm);
    border-top: 1px solid var(--border);
}

#chatInput {
    flex: 1;
    padding: 10px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text);
    font-family: inherit;
    font-size: 13px;
}

#chatInput:focus {
    border-color: var(--brand-dim);
    outline: 2px solid var(--brand);
    outline-offset: -2px;
}

#chatInput:disabled {
    opacity: 0.4;
}

#chatInput::placeholder {
    color: var(--text-muted);
}

#chatSend {
    padding: 10px 14px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.15s ease;
}

#chatSend:hover:not(:disabled) {
    border-color: var(--brand-dim);
    color: var(--brand);
}

@media (max-width: 720px) {
    .header {
        grid-template-columns: minmax(0, 1fr) auto;
        grid-template-areas:
            "brand controls"
            "status status";
        row-gap: 6px;
    }

    .header h1 {
        grid-area: brand;
    }

    .status {
        grid-area: status;
        justify-self: start;
        padding-left: 0;
    }

    .header-controls {
        grid-area: controls;
    }

    .scene-meta {
        max-width: 68vw;
        top: 28px;
        left: 22px;
    }

    #chatPanel {
        height: clamp(176px, 28vh, 220px);
    }
}

#chatSend:active:not(:disabled) {
    background: oklch(0.20 0.02 70);
}

#chatSend:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 2px;
}

#chatSend:disabled {
    opacity: 0.4;
    cursor: default;
}

/* --- Screen reader only --- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}