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

:root {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2a2a2a;
    --bg-user: #2d3748;
    --bg-assistant: #1e1e1e;
    --text-primary: #e8e8e8;
    --text-secondary: #888;
    --accent: #10a37f;
    --accent-dim: rgba(16, 163, 127, 0.15);
    --recording: #ef4444;
    --recording-dim: rgba(239, 68, 68, 0.15);
    --stop: #f59e0b;
    --border: #333;
    --radius: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
}

header {
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    background: var(--bg-secondary);
}

header h1 {
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}
.dot-ok { background: #22c55e; }
.dot-error { background: #ef4444; }
.dot-unknown { background: #a3a3a3; }

main {
    flex: 1;
    overflow-y: auto;
    padding: 16px 16px 8px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.message {
    max-width: 85%;
    padding: 10px 14px;
    border-radius: var(--radius);
    line-height: 1.55;
    word-wrap: break-word;
    position: relative;
}

.message-user {
    align-self: flex-end;
    background: var(--bg-user);
    border-radius: var(--radius) var(--radius) 4px var(--radius);
}

.message-assistant {
    align-self: flex-start;
    background: var(--bg-assistant);
    border: 1px solid var(--border);
    border-radius: var(--radius) var(--radius) var(--radius) 4px;
}

.message-text {
    white-space: pre-wrap;
    font-size: 14.5px;
}

.message-delay {
    font-size: 11px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 4px;
    font-variant-numeric: tabular-nums;
}

.message-lang {
    display: inline-block;
    font-size: 9px;
    color: var(--accent);
    background: var(--accent-dim);
    padding: 1px 6px;
    border-radius: 4px;
    margin-top: 5px;
    font-weight: 600;
    letter-spacing: 0.2px;
}

.message-timing {
    font-size: 10px;
    color: var(--text-secondary);
    margin-top: 6px;
    font-variant-numeric: tabular-nums;
}

.replay-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 3px 10px;
    font-size: 12px;
    cursor: pointer;
    margin-top: 6px;
    color: var(--text-secondary);
    transition: all 0.15s;
}

.replay-btn:hover {
    border-color: var(--accent);
    color: var(--text-primary);
    background: var(--accent-dim);
}

.message-audio {
    margin-top: 8px;
}

.play-btn {
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 4px 12px;
    font-size: 12px;
    cursor: pointer;
}
.play-btn:hover {
    opacity: 0.85;
}

.message-processing {
    align-self: flex-start;
    background: var(--bg-assistant);
    border: 1px solid var(--border);
    padding: 12px 16px;
    border-radius: var(--radius);
    color: var(--text-secondary);
    font-style: italic;
}

footer {
    border-top: 1px solid var(--border);
    padding: 10px 16px 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
    background: var(--bg-secondary);
}

.footer-options {
    display: flex;
    align-items: center;
    gap: 16px;
}

#auto-play-toggle {
    font-size: 11px;
    color: var(--text-secondary);
}
#auto-play-toggle input {
    margin-right: 4px;
    accent-color: var(--accent);
}

.lang-select-group {
    display: flex;
    gap: 10px;
}

.lang-select-label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    color: var(--text-secondary);
}

.lang-select-label select {
    font-size: 11px;
    font-family: inherit;
    color: var(--accent);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 3px 6px;
    font-weight: 600;
    cursor: pointer;
    outline: none;
    transition: border-color 0.15s;
    max-width: 110px;
}
.lang-select-label select:hover,
.lang-select-label select:focus {
    border-color: var(--accent);
}
.lang-select-label select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.controls {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* --- Stop button --- */

.stop-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid var(--stop);
    background: transparent;
    color: var(--stop);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.stop-btn:hover {
    background: rgba(245, 158, 11, 0.15);
}

.stop-btn:active {
    transform: scale(0.92);
}

.stop-btn.hidden {
    display: none;
}

/* --- Record button --- */

.record-btn {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    border: 3px solid var(--accent);
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.record-btn:hover {
    background: var(--accent-dim);
}

.record-btn:active {
    transform: scale(0.95);
}

.record-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--accent);
    transition: all 0.2s;
}

.record-btn.recording {
    border-color: var(--recording);
}

.record-btn.recording .record-icon {
    background: var(--recording);
    border-radius: 4px;
    width: 20px;
    height: 20px;
    animation: pulse-icon 1s ease-in-out infinite;
}

@keyframes pulse-icon {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.record-btn.processing {
    border-color: var(--text-secondary);
    cursor: not-allowed;
    opacity: 0.5;
}

.record-btn.processing .record-icon {
    background: var(--text-secondary);
    animation: spin 1s linear infinite;
    border-radius: 50%;
    width: 20px;
    height: 20px;
}

.record-btn.streaming {
    border-color: var(--accent);
}

.record-btn.streaming .record-icon {
    background: var(--accent);
    border-radius: 50%;
    animation: pulse-icon 1.5s ease-in-out infinite;
}

.record-btn.playing {
    border-color: var(--accent);
    opacity: 0.6;
}

.record-btn.playing .record-icon {
    background: var(--accent);
    border-radius: 50%;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

#record-status {
    font-size: 12px;
    color: var(--text-secondary);
    min-height: 16px;
}

/* Scrollbar */
main::-webkit-scrollbar {
    width: 6px;
}
main::-webkit-scrollbar-track {
    background: transparent;
}
main::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}