:root {
    --bg-primary: #06060f;
    --bg-secondary: rgba(12, 12, 30, 0.85);
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --accent: #06b6d4;
    --accent-purple: #a855f7;
    --danger: #ef4444;
    --glass: rgba(15, 23, 42, 0.55);
    --glass-border: rgba(148, 163, 184, 0.12);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

/* ── Canvas ─────────────────────────────────────────────────────────────────── */

#waveCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ── Layout ─────────────────────────────────────────────────────────────────── */

.app-container {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 860px;
    margin: 0 auto;
    padding: 20px 24px;
}

/* ── Header ─────────────────────────────────────────────────────────────────── */

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 22px;
    background: var(--glass);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    margin-bottom: 12px;
    flex-shrink: 0;
}

header h1 {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--accent), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.model-label {
    background: rgba(15, 23, 42, 0.8);
    color: var(--text-secondary);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 8px 14px;
    font-size: 0.85rem;
    font-family: inherit;
}

#langBtn {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    min-width: 38px;
}

.icon-btn {
    background: transparent;
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    color: var(--text-primary);
    border-color: rgba(148, 163, 184, 0.3);
    background: rgba(255, 255, 255, 0.04);
}

/* ── Chat ───────────────────────────────────────────────────────────────────── */

.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 12px 4px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    scrollbar-width: thin;
    scrollbar-color: rgba(148, 163, 184, 0.15) transparent;
}

.chat-container::-webkit-scrollbar {
    width: 5px;
}

.chat-container::-webkit-scrollbar-track {
    background: transparent;
}

.chat-container::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.15);
    border-radius: 10px;
}

.welcome-message {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    gap: 16px;
    color: var(--text-secondary);
    text-align: center;
    padding: 40px 20px;
}

.welcome-icon {
    color: rgba(6, 182, 212, 0.35);
}

.welcome-message p {
    font-size: 1.05rem;
    font-weight: 500;
}

.welcome-sub {
    font-size: 0.85rem !important;
    font-weight: 400 !important;
    opacity: 0.7;
}

/* ── Messages ───────────────────────────────────────────────────────────────── */

.message {
    display: flex;
    gap: 12px;
    max-width: 88%;
    animation: msgIn 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.85rem;
    background: var(--glass);
    border: 1px solid var(--glass-border);
}

.message.user .message-avatar {
    background: rgba(6, 182, 212, 0.12);
    border-color: rgba(6, 182, 212, 0.25);
}

.message.assistant .message-avatar {
    background: rgba(168, 85, 247, 0.12);
    border-color: rgba(168, 85, 247, 0.25);
}

.message-bubble {
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    padding: 12px 16px;
    line-height: 1.55;
    font-size: 0.92rem;
    white-space: pre-wrap;
    word-break: break-word;
}

.message.user .message-bubble {
    background: rgba(6, 182, 212, 0.1);
    border-color: rgba(6, 182, 212, 0.2);
}

.message.assistant .message-bubble {
    background: rgba(168, 85, 247, 0.06);
    border-color: rgba(168, 85, 247, 0.15);
}

@keyframes msgIn {
    from {
        opacity: 0;
        transform: translateY(12px) scale(0.97);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ── Controls ───────────────────────────────────────────────────────────────── */

.controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 20px 0 40px;
    flex-shrink: 0;
}

.status {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 500;
    min-height: 1.2em;
    transition: color 0.3s;
}

.status.listening {
    color: var(--danger);
}

.status.thinking {
    color: var(--accent-purple);
}

.status.speaking {
    color: var(--accent);
}

.record-btn {
    width: 76px;
    height: 76px;
    border-radius: 50%;
    border: 3px solid var(--accent);
    background: rgba(6, 182, 212, 0.08);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    color: var(--accent);
    position: relative;
}

.record-btn::before {
    content: '';
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    border: 2px solid transparent;
    transition: border-color 0.3s;
}

.record-btn:hover {
    background: rgba(6, 182, 212, 0.15);
    transform: scale(1.06);
}

.record-btn:active {
    transform: scale(0.96);
}

.record-btn.recording {
    border-color: var(--danger);
    background: rgba(239, 68, 68, 0.12);
    color: var(--danger);
    animation: recPulse 1.6s ease-in-out infinite;
}

.record-btn.recording::before {
    border-color: rgba(239, 68, 68, 0.2);
    animation: recRing 1.6s ease-out infinite;
}

.record-btn.processing {
    border-color: var(--accent-purple);
    background: rgba(168, 85, 247, 0.1);
    color: var(--accent-purple);
    pointer-events: none;
    animation: processPulse 1.2s ease-in-out infinite;
}

@keyframes recPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.35); }
    50% { box-shadow: 0 0 0 18px rgba(239, 68, 68, 0); }
}

@keyframes recRing {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(1.4); opacity: 0; }
}

@keyframes processPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
    opacity: 0.5;
}

.hint kbd {
    background: rgba(148, 163, 184, 0.1);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 4px;
    padding: 1px 6px;
    font-family: inherit;
    font-size: 0.7rem;
}

/* ── Cookie Consent Banner ──────────────────────────────────────────────────── */

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 10;
    display: flex;
    justify-content: center;
    padding: 20px 24px;
    background: rgba(6, 6, 15, 0.95);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-top: 1px solid var(--glass-border);
}

.cookie-content {
    max-width: 600px;
    text-align: center;
}

.cookie-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.cookie-content p {
    font-size: 0.82rem;
    line-height: 1.5;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.cookie-compliance {
    font-style: italic;
}

.cookie-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 14px;
}

.cookie-accept,
.cookie-decline {
    padding: 8px 24px;
    border-radius: 10px;
    font-size: 0.85rem;
    font-family: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid var(--glass-border);
}

.cookie-accept {
    background: var(--accent);
    color: #06060f;
    border-color: var(--accent);
}

.cookie-accept:hover {
    opacity: 0.85;
}

.cookie-decline {
    background: transparent;
    color: var(--text-secondary);
}

.cookie-decline:hover {
    color: var(--text-primary);
    border-color: rgba(148, 163, 184, 0.3);
}

/* ── Footer ────────────────────────────────────────────────────────────────── */

.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 2;
    text-align: center;
    padding: 10px 16px;
    font-size: 0.7rem;
}

.footer a {
    color: var(--text-secondary);
    text-decoration: none;
    opacity: 0.5;
    transition: opacity 0.2s;
}

.footer a:hover {
    opacity: 0.8;
}

/* ── Responsive ─────────────────────────────────────────────────────────────── */

@media (max-width: 600px) {
    .app-container {
        padding: 12px 14px;
    }

    header {
        padding: 12px 16px;
        border-radius: 12px;
    }

    header h1 {
        font-size: 1rem;
    }

    .model-label {
        font-size: 0.8rem;
    }

    .message {
        max-width: 92%;
    }

    .record-btn {
        width: 68px;
        height: 68px;
    }

    .controls {
        padding: 12px 0 44px;
        gap: 8px;
    }
}