/* ==========================================
   GLOBAL STYLES & RESET
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --bg-main: #0f0f1e;
    --bg-secondary: #1a1a2e;
    --bg-chat: #16213e;
    --text-primary: #ffffff;
    --text-secondary: #b8b9be;
    --bot-message-bg: rgba(102, 126, 234, 0.1);
    --user-message-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --input-bg: rgba(255, 255, 255, 0.05);
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-main);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(118, 75, 162, 0.1) 0%, transparent 50%);
}

/* ==========================================
   CONTAINER
   ========================================== */
.container {
    width: 100%;
    max-width: 900px;
    height: 90vh;
    max-height: 800px;
    background: var(--bg-secondary);
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
}

/* ==========================================
   HEADER
   ========================================== */
.header {
    background: var(--primary-gradient);
    padding: 24px 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-md);
    flex-wrap: wrap;
    gap: 16px;
}

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

.bot-avatar {
    width: 52px;
    height: 52px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.bot-avatar svg {
    width: 28px;
    height: 28px;
    color: white;
}

.header-text h1 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 4px;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 13px;
    opacity: 0.9;
    font-weight: 400;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.15);
    padding: 8px 14px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #4ade80;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

.status-text {
    font-size: 13px;
    font-weight: 500;
}

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

.accuracy-link {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.15);
    padding: 8px 16px;
    border-radius: 20px;
    color: white;
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.accuracy-link:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.accuracy-link svg {
    width: 16px;
    height: 16px;
}

.exit-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.15);
    padding: 8px 16px;
    border-radius: 20px;
    color: white;
    border: none;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    font-family: inherit;
}

.exit-btn:hover {
    background: rgba(244, 67, 54, 0.8);
    transform: translateY(-2px);
}

.exit-btn svg {
    width: 16px;
    height: 16px;
}

/* ==========================================
   CHAT CONTAINER
   ========================================== */
.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    background: var(--bg-chat);
    scroll-behavior: smooth;
}

.chat-container::-webkit-scrollbar {
    width: 6px;
}

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

.chat-container::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
}

.chat-container::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* ==========================================
   MESSAGES
   ========================================== */
.message {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    animation: messageSlideIn 0.3s ease-out;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.message-avatar svg {
    width: 20px;
    height: 20px;
    color: white;
}

.message-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.message-bubble {
    padding: 14px 18px;
    border-radius: 16px;
    line-height: 1.6;
    font-size: 15px;
    max-width: 85%;
}

.bot-message .message-bubble {
    background: var(--bot-message-bg);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-top-left-radius: 4px;
}

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

.user-message .message-avatar {
    background: var(--secondary-gradient);
}

.user-message .message-content {
    align-items: flex-end;
}

.user-message .message-bubble {
    background: var(--user-message-bg);
    border-top-right-radius: 4px;
    color: white;
    box-shadow: var(--shadow-md);
}

.message-time {
    font-size: 11px;
    color: var(--text-secondary);
    padding: 0 8px;
}

.message-bubble p {
    margin-bottom: 8px;
}

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

/* ==========================================
   TYPING INDICATOR
   ========================================== */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 12px 16px;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--text-secondary);
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

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

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

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.7;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

/* ==========================================
   QUICK QUESTIONS
   ========================================== */
.quick-questions {
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid var(--border-color);
}

.quick-title {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.quick-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.quick-btn {
    padding: 10px 16px;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(102, 126, 234, 0.3);
    border-radius: 20px;
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    font-weight: 500;
}

.quick-btn:hover {
    background: var(--primary-gradient);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

/* ==========================================
   INPUT CONTAINER
   ========================================== */
.input-container {
    padding: 20px 24px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.input-wrapper {
    display: flex;
    gap: 12px;
    align-items: center;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 6px;
    transition: all 0.3s ease;
}

.input-wrapper:focus-within {
    border-color: rgba(102, 126, 234, 0.5);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

#userInput {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 15px;
    padding: 12px 16px;
    outline: none;
    font-family: inherit;
}

#userInput::placeholder {
    color: var(--text-secondary);
}

.send-btn {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: none;
    background: var(--primary-gradient);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.send-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

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

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

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

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 768px) {
    body {
        padding: 0;
    }

    .container {
        max-width: 100%;
        height: 100vh;
        max-height: 100vh;
        border-radius: 0;
    }

    .header {
        padding: 20px;
    }

    .header-text h1 {
        font-size: 18px;
    }

    .subtitle {
        font-size: 12px;
    }

    .chat-container {
        padding: 16px;
    }

    .message-bubble {
        max-width: 90%;
        font-size: 14px;
    }

    .quick-questions {
        padding: 12px 16px;
    }

    .quick-buttons {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 4px;
    }

    .quick-btn {
        white-space: nowrap;
        font-size: 12px;
        padding: 8px 14px;
    }

    .input-container {
        padding: 16px;
    }
}

@media (max-width: 480px) {
    .bot-avatar {
        width: 44px;
        height: 44px;
    }

    .bot-avatar svg {
        width: 24px;
        height: 24px;
    }

    .status-indicator {
        padding: 6px 10px;
    }

    .status-text {
        font-size: 11px;
    }
}