:root {
    --bg: #09090b;
    --panel: rgba(255, 255, 255, 0.05);
    --panel-strong: rgba(255, 255, 255, 0.08);
    --border: rgba(255, 255, 255, 0.09);
    --text: #e4e4e7;
    --text-dim: #a1a1aa;
    --text-faint: #71717a;
    --accent-1: #60a5fa;
    --accent-2: #a78bfa;
    --user-bubble: rgba(96, 165, 250, 0.14);
    --agent-bubble: rgba(167, 139, 250, 0.14);
    --danger: #ef4444;
    color-scheme: dark;
}

@media (prefers-color-scheme: light) {
    :root {
        --bg: #fafafa;
        --panel: rgba(0, 0, 0, 0.04);
        --panel-strong: rgba(0, 0, 0, 0.07);
        --border: rgba(0, 0, 0, 0.1);
        --text: #18181b;
        --text-dim: #52525b;
        --text-faint: #a1a1aa;
        --user-bubble: rgba(37, 99, 235, 0.1);
        --agent-bubble: rgba(124, 58, 237, 0.1);
        color-scheme: light;
    }
}

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

html, body { height: 100%; }

body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: calc(2rem + env(safe-area-inset-top)) calc(1rem + env(safe-area-inset-right))
             calc(2rem + env(safe-area-inset-bottom)) calc(1rem + env(safe-area-inset-left));
}

.container {
    width: 100%;
    max-width: 680px;
}

header {
    text-align: center;
    margin-bottom: 1.5rem;
}

h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-faint);
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

/* ── Orb ─────────────────────────────────────────────────────────────────── */
.orb-stage {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 1.75rem;
}

.orb {
    --pulse-scale: 1;
    position: relative;
    width: 200px;
    height: 200px;
    display: grid;
    place-items: center;
}

.orb-core {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    background: radial-gradient(circle at 35% 30%, var(--accent-1), var(--accent-2) 70%);
    box-shadow:
        0 0 60px 8px color-mix(in srgb, var(--accent-2) 45%, transparent),
        inset 0 0 30px rgba(255, 255, 255, 0.15);
    transform: scale(var(--pulse-scale));
    transition: box-shadow 0.3s ease;
    animation: breathe 4s ease-in-out infinite;
}

.orb-ring {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 1px solid color-mix(in srgb, var(--accent-2) 35%, transparent);
    opacity: var(--pulse-opacity, 0.35);
    transform: scale(var(--pulse-scale));
    transition: opacity 0.2s ease;
}

/* Per-state glow */
.orb[data-state="idle"] .orb-core {
    filter: saturate(0.5) brightness(0.75);
    box-shadow: 0 0 30px 4px color-mix(in srgb, var(--accent-2) 25%, transparent);
}

.orb[data-state="connecting"] .orb-core {
    animation-duration: 1.6s;
    filter: saturate(0.8) brightness(0.9);
}

.orb[data-state="listening"] .orb-core {
    box-shadow: 0 0 70px 12px color-mix(in srgb, var(--accent-1) 55%, transparent),
        inset 0 0 30px rgba(255, 255, 255, 0.18);
}

.orb[data-state="thinking"] .orb-core {
    animation-duration: 2s;
    filter: saturate(1.1) brightness(1.05);
    box-shadow: 0 0 75px 14px color-mix(in srgb, var(--accent-2) 60%, transparent),
        inset 0 0 30px rgba(255, 255, 255, 0.2);
}

.orb[data-state="speaking"] .orb-core {
    animation: none;
    box-shadow: 0 0 90px 18px color-mix(in srgb, var(--accent-1) 65%, transparent),
        inset 0 0 34px rgba(255, 255, 255, 0.22);
}

@keyframes breathe {
    0%, 100% { transform: scale(calc(var(--pulse-scale) * 1)); }
    50% { transform: scale(calc(var(--pulse-scale) * 1.05)); }
}

.orb-labels {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    margin-top: 1rem;
    min-height: 3.6rem;
}

.state-label {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.thinking-chip {
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    background: var(--panel-strong);
    border: 1px solid var(--border);
    color: var(--text-dim);
    animation: chipPulse 1.4s ease-in-out infinite;
}

@keyframes chipPulse {
    0%, 100% { opacity: 0.55; }
    50% { opacity: 1; }
}

.barge-hint {
    font-size: 0.75rem;
    color: var(--text-faint);
    opacity: 0.6;
}

/* ── Controls ────────────────────────────────────────────────────────────── */
.controls {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    align-items: center;
    margin-bottom: 1.25rem;
}

.btn {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-primary {
    background: #3b82f6;
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: #2563eb;
    transform: translateY(-1px);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-icon {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: 50%;
    background: var(--panel);
    color: var(--text-dim);
    border: 1px solid var(--border);
}

.btn-icon:hover {
    color: var(--text);
    background: var(--panel-strong);
}

.btn-icon.muted {
    color: #ef4444;
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

.btn-ghost {
    background: transparent;
    color: var(--text-faint);
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
    border-radius: 6px;
}

.btn-ghost:hover {
    color: var(--text);
    background: var(--panel-strong);
}

/* ── Status + mic meter ──────────────────────────────────────────────────── */
.status {
    text-align: center;
    padding: 0.75rem;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 0.6rem;
    font-size: 0.9rem;
    color: var(--text-dim);
}

.mic-meter {
    height: 4px;
    background: var(--panel-strong);
    border-radius: 2px;
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.mic-meter-fill {
    display: block;
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
    border-radius: 2px;
    transition: width 0.1s linear;
}

/* ── Transcript ──────────────────────────────────────────────────────────── */
.transcript {
    background: var(--panel);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem;
    max-height: 50vh;
    overflow-y: auto;
}

.transcript-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 700;
    color: var(--text-dim);
    margin-bottom: 1rem;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.message-row {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    margin-bottom: 0.6rem;
    position: relative;
    animation: msgIn 120ms ease-out;
}

@keyframes msgIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.message-row.user {
    justify-content: flex-end;
}

.avatar-dot {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    flex-shrink: 0;
    margin-bottom: 2px;
}

.bubble {
    max-width: 78%;
    padding: 0.6rem 0.9rem;
    border-radius: 14px;
    font-size: 0.95rem;
    line-height: 1.5;
    position: relative;
}

.message-row.user .bubble {
    background: var(--user-bubble);
    border-bottom-right-radius: 4px;
}

.message-row.agent .bubble {
    background: var(--agent-bubble);
    border-bottom-left-radius: 4px;
}

.bubble.partial {
    opacity: 0.55;
}

/* Timestamps on hover (CSS only, from data-ts attribute) */
.message-row::after {
    content: attr(data-ts);
    position: absolute;
    bottom: -1.1rem;
    font-size: 0.68rem;
    color: var(--text-faint);
    opacity: 0;
    transition: opacity 0.15s ease;
    pointer-events: none;
}

.message-row:hover::after {
    opacity: 1;
}

.message-row.user::after {
    right: 0;
}

.message-row.agent::after {
    left: 2rem;
}

/* ── Agent audio visualizer (bars on latest agent bubble) ─────────────────── */
.audio-viz {
    display: inline-flex;
    align-items: flex-end;
    gap: 2px;
    height: 14px;
    margin-left: 0.6rem;
    vertical-align: middle;
}

.audio-viz i {
    width: 3px;
    height: 15%;
    border-radius: 2px;
    background: linear-gradient(180deg, var(--accent-2), var(--accent-1));
    opacity: 0.8;
    transition: height 0.08s linear;
}

/* ── Settings sheet (voice picker) ───────────────────────────────────────── */
.sheet-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 90;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.sheet-backdrop:not([hidden]) {
    opacity: 1;
}

.settings-sheet {
    position: fixed;
    left: 50%;
    bottom: 0;
    transform: translate(-50%, 100%);
    width: 100%;
    max-width: 680px;
    max-height: 75vh;
    background: var(--panel-strong);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-bottom: none;
    border-radius: 16px 16px 0 0;
    padding: 0.75rem 1.25rem calc(1.25rem + env(safe-area-inset-bottom));
    z-index: 100;
    transition: transform 0.25s cubic-bezier(0.32, 0.72, 0, 1);
    display: flex;
    flex-direction: column;
}

.settings-sheet.open {
    transform: translate(-50%, 0);
}

.sheet-handle {
    width: 36px;
    height: 4px;
    border-radius: 2px;
    background: var(--border);
    margin: 0 auto 0.75rem;
}

.sheet-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.sheet-header h2 {
    font-size: 1.1rem;
    font-weight: 700;
}

.voice-list {
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-right: 0.25rem;
}

.voice-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.8rem 1rem;
    border-radius: 10px;
    background: var(--panel);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.15s ease;
}

.voice-card:hover {
    background: var(--panel-strong);
}

.voice-card.active {
    border-color: color-mix(in srgb, var(--accent-2) 60%, transparent);
    background: var(--agent-bubble);
}

.voice-name {
    font-size: 0.95rem;
    font-weight: 500;
}

/* ── Scrollbar ───────────────────────────────────────────────────────────── */
.transcript::-webkit-scrollbar,
.voice-list::-webkit-scrollbar { width: 6px; }
.transcript::-webkit-scrollbar-track,
.voice-list::-webkit-scrollbar-track { background: transparent; }
.transcript::-webkit-scrollbar-thumb,
.voice-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ── Reduced motion ──────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    .orb-core,
    .thinking-chip,
    .message-row,
    .settings-sheet,
    .sheet-backdrop,
    .audio-viz i,
    .mic-meter-fill {
        animation: none !important;
        transition: none !important;
    }
}