:root {
    --primary-color: #ef4444; /* Red-500 */
    --primary-hover: #dc2626; /* Red-600 */
    --bg-color: #0f172a; /* Slate-900 */
    --card-bg: #1e293b; /* Slate-800 */
    --text-color: #f8fafc; /* Slate-50 */
    --text-muted: #94a3b8; /* Slate-400 */
    --accent-color: #3b82f6; /* Blue-500 */
    --success-color: #10b981; /* Green-500 */
    --warning-color: #f59e0b; /* Amber-500 */
    --error-color: #ef4444; /* Red-500 */
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 100%;
    max-width: 600px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh; /* Dynamic viewport height for mobile */
}

header {
    text-align: center;
    margin-bottom: 20px;
    animation: fadeInDown 0.8s ease-out;
}

h1 {
    font-size: clamp(1.5rem, 5vw, 2rem);
    font-weight: 700;
    margin: 0;
    background: linear-gradient(to right, #ef4444, #f87171);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 5px;
}

/* Connection Status */
.connection-status {
    display: inline-block;
    margin-top: 8px;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.connection-status.online {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.connection-status.offline {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
    animation: blink 2s infinite;
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

#chat-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 20px;
    background-color: var(--card-bg);
    border-radius: 20px;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    scroll-behavior: smooth;
}

.message {
    max-width: 80%;
    padding: 12px 16px;
    border-radius: 16px;
    line-height: 1.5;
    font-size: 0.95rem;
    animation: popIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

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

.agent-message {
    align-self: flex-start;
    background-color: #334155; /* Slate-700 */
    color: var(--text-color);
    border-bottom-left-radius: 4px;
}

.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    padding-bottom: 20px;
}

#mic-button {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: var(--primary-color);
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.4);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    -webkit-tap-highlight-color: transparent;
}

#mic-button:hover:not(:disabled) {
    transform: scale(1.05);
    background-color: var(--primary-hover);
    box-shadow: 0 0 30px rgba(239, 68, 68, 0.6);
}

#mic-button:active:not(:disabled) {
    transform: scale(0.95);
}

#mic-button:focus-visible {
    outline: 3px solid var(--accent-color);
    outline-offset: 4px;
}

#mic-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#mic-button.listening {
    animation: pulse 1.5s infinite;
    background-color: var(--success-color);
}

#mic-icon {
    width: 32px;
    height: 32px;
    fill: white;
    pointer-events: none;
}

/* Status Text */
.status-text {
    text-align: center;
    font-size: 0.8rem;
    margin-top: 10px;
    height: 20px;
    transition: color 0.3s ease;
}

.status-ready {
    color: var(--text-muted);
}

.status-listening {
    color: var(--success-color);
    font-weight: 600;
}

.status-processing {
    color: var(--accent-color);
    font-weight: 600;
}

.status-error {
    color: var(--error-color);
    font-weight: 600;
}

.status-warning {
    color: var(--warning-color);
    font-weight: 600;
}

.status-success {
    color: var(--success-color);
    font-weight: 600;
}

.status-info {
    color: var(--accent-color);
    font-weight: 600;
}

/* Notifications */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    max-width: 350px;
    padding: 16px 20px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    font-size: 0.9rem;
    font-weight: 500;
    z-index: 1000;
    opacity: 0;
    transform: translateX(400px);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.notification.show {
    opacity: 1;
    transform: translateX(0);
}

.notification-info {
    background-color: var(--accent-color);
    color: white;
}

.notification-success {
    background-color: var(--success-color);
    color: white;
}

.notification-warning {
    background-color: var(--warning-color);
    color: white;
}

.notification-error {
    background-color: var(--error-color);
    color: white;
}

/* Animations */
@keyframes fadeInDown {
    from { 
        opacity: 0; 
        transform: translateY(-20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

@keyframes popIn {
    from { 
        opacity: 0; 
        transform: scale(0.8); 
    }
    to { 
        opacity: 1; 
        transform: scale(1); 
    }
}

@keyframes pulse {
    0% { 
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); 
    }
    70% { 
        box-shadow: 0 0 0 20px rgba(16, 185, 129, 0); 
    }
    100% { 
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); 
    }
}

@keyframes blink {
    0%, 50%, 100% { 
        opacity: 1; 
    }
    25%, 75% { 
        opacity: 0.5; 
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: #475569;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

/* Mobile Responsiveness */
@media (max-width: 640px) {
    .container {
        padding: 16px;
    }

    h1 {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 0.8rem;
    }

    #chat-container {
        padding: 16px;
        border-radius: 16px;
        gap: 12px;
    }

    .message {
        max-width: 85%;
        font-size: 0.9rem;
        padding: 10px 14px;
    }

    #mic-button {
        width: 70px;
        height: 70px;
    }

    #mic-icon {
        width: 28px;
        height: 28px;
    }

    .notification {
        top: 10px;
        right: 10px;
        left: 10px;
        max-width: none;
        font-size: 0.85rem;
    }

    .connection-status {
        font-size: 0.7rem;
        padding: 3px 10px;
    }
}

/* Landscape Mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .container {
        padding: 10px;
    }

    header {
        margin-bottom: 10px;
    }

    h1 {
        font-size: 1.25rem;
    }

    .subtitle, .connection-status {
        display: none;
    }

    #chat-container {
        margin-bottom: 10px;
        padding: 12px;
    }

    #mic-button {
        width: 60px;
        height: 60px;
    }

    .controls {
        padding-bottom: 10px;
    }
}

/* Print Styles */
@media print {
    body {
        background-color: white;
        color: black;
    }

    .controls, .status-text, .connection-status {
        display: none;
    }

    #chat-container {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #ff0000;
        --accent-color: #0000ff;
        --text-color: #ffffff;
        --bg-color: #000000;
    }

    #mic-button {
        border: 2px solid white;
    }
}