/* CSS Variables - Dark Theme */
:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --text-muted: #666;
    --accent: #e94560;
    --accent-hover: #ff6b6b;
    --user-bubble: #0f3460;
    --assistant-bubble: #16213e;
    --border-color: #2a2a4a;
    --success: #4ade80;
    --warning: #fbbf24;
    --error: #ef4444;
    --shadow: rgba(0, 0, 0, 0.3);
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -webkit-tap-highlight-color: transparent;
}

.hidden {
    display: none !important;
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal-content {
    background: var(--bg-secondary);
    padding: 32px;
    border-radius: 16px;
    width: 100%;
    max-width: 320px;
    text-align: center;
}

.modal-content h2 {
    margin-bottom: 24px;
    font-size: 24px;
    font-weight: 600;
}

.modal-content input {
    width: 100%;
    padding: 16px;
    font-size: 24px;
    text-align: center;
    letter-spacing: 8px;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.modal-content input:focus {
    outline: none;
    border-color: var(--accent);
}

.error-text {
    color: var(--error);
    font-size: 14px;
    margin-top: 12px;
    min-height: 20px;
}

/* Buttons */
.btn-primary {
    width: 100%;
    padding: 16px 24px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    min-height: 48px;
}

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

.btn-primary:active {
    transform: scale(0.98);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 12px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, color 0.2s;
    min-width: 48px;
    min-height: 48px;
}

.btn-icon:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

/* App Layout */
#app {
    display: flex;
    flex-direction: column;
    height: 100%;
    max-height: 100vh;
}

/* Header */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.assistant-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center;
    border: 2px solid var(--accent);
    box-shadow: 0 2px 6px var(--shadow);
    display: block;
    flex-shrink: 0;
}

.assistant-avatar-placeholder {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    border: 2px solid var(--accent);
    box-shadow: 0 2px 8px var(--shadow);
}

.header h1 {
    font-size: 20px;
    font-weight: 600;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Connection Status */
.status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    transition: background 0.3s;
}

.status-dot.connected {
    background: var(--success);
    box-shadow: 0 0 8px var(--success);
}

.status-dot.disconnected {
    background: var(--error);
}

.status-dot.connecting {
    background: var(--warning);
    animation: pulse 1s ease-in-out infinite;
}

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

/* Messages Container */
.messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    -webkit-overflow-scrolling: touch;
}

/* Message Bubbles */
.message {
    max-width: 85%;
    padding: 12px 16px;
    border-radius: 16px;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.message.assistant {
    align-self: flex-start;
    background: var(--assistant-bubble);
    border-bottom-left-radius: 4px;
}

.message.assistant.streaming {
    border-left: 2px solid var(--accent);
}

/* Welcome Message */
.welcome-message {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.welcome-message p {
    font-size: 18px;
}

/* Markdown Styling */
.message pre {
    background: var(--bg-primary);
    padding: 12px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 8px 0;
    font-size: 14px;
}

.message code {
    background: var(--bg-primary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 14px;
    font-family: 'SF Mono', 'Menlo', 'Monaco', monospace;
}

.message pre code {
    background: transparent;
    padding: 0;
}

.message ul, .message ol {
    margin: 8px 0;
    padding-left: 20px;
}

.message li {
    margin: 4px 0;
}

.message p {
    margin: 8px 0;
}

.message p:first-child {
    margin-top: 0;
}

.message p:last-child {
    margin-bottom: 0;
}

.message a {
    color: var(--accent);
    text-decoration: none;
}

.message a:hover {
    text-decoration: underline;
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 8px 0;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--text-secondary);
    border-radius: 50%;
    animation: bounce 1.4s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes bounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-8px); }
}

/* Input Area */
.input-area {
    padding: 12px 16px;
    padding-bottom: max(12px, env(safe-area-inset-bottom));
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

.input-container {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    background: var(--bg-primary);
    border-radius: 24px;
    padding: 8px;
    border: 1px solid var(--border-color);
}

.input-container:focus-within {
    border-color: var(--accent);
}

#message-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 16px;
    padding: 8px 12px;
    resize: none;
    max-height: 120px;
    line-height: 1.4;
}

#message-input:focus {
    outline: none;
}

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

/* Voice Button */
.voice-btn {
    transition: all 0.2s;
}

.voice-btn.listening {
    color: var(--accent);
    animation: pulse-voice 1s ease-in-out infinite;
}

@keyframes pulse-voice {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.voice-btn.listening svg {
    fill: var(--accent);
}

/* Send Button */
.send-btn {
    width: 48px;
    height: 48px;
    padding: 0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.send-btn svg {
    width: 20px;
    height: 20px;
}

/* Scrollbar Styling */
.messages::-webkit-scrollbar {
    width: 6px;
}

.messages::-webkit-scrollbar-track {
    background: transparent;
}

.messages::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.messages::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Desktop Adjustments */
@media (min-width: 768px) {
    .messages {
        padding: 24px;
        max-width: 800px;
        margin: 0 auto;
        width: 100%;
    }

    .message {
        max-width: 70%;
    }

    .input-area {
        padding: 16px 24px;
    }

    .input-container {
        max-width: 800px;
        margin: 0 auto;
    }
}

/* Safe Area for notched phones */
@supports (padding: max(0px)) {
    .header {
        padding-top: max(12px, env(safe-area-inset-top));
    }
}