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

:root {
    --primary-color: #667eea;
    --primary-dark: #5568d3;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --accent-dark: #f5576c;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==================== LOGIN PAGE ==================== */
.login-page {
    background: var(--bg-gradient);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    max-width: 1200px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.login-card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow-xl);
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.login-logo {
    width: 120px;
    height: auto;
    margin-bottom: 24px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.login-header h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.login-header p {
    font-size: 16px;
    color: var(--text-secondary);
}

.login-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.google-signin-btn,
.guest-signin-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 16px 24px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-white);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.google-signin-btn:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.guest-signin-btn {
    background: var(--bg-light);
    color: var(--text-secondary);
}

.guest-signin-btn:hover {
    background: var(--border-color);
    transform: translateY(-2px);
}

.divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 8px 0;
    color: var(--text-secondary);
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-color);
}

.divider span {
    padding: 0 16px;
    font-size: 14px;
}

.login-footer {
    margin-top: 32px;
    text-align: center;
    font-size: 13px;
    color: var(--text-secondary);
}

.login-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.login-footer a:hover {
    text-decoration: underline;
}

.features-section {
    display: grid;
    gap: 24px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ==================== CHAT PAGE ==================== */
.chat-page {
    display: flex;
    height: 100vh;
    overflow: hidden;
    background: var(--bg-light);
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--bg-white);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.new-chat-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.new-chat-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

.sidebar-content::-webkit-scrollbar {
    width: 6px;
}

.sidebar-content::-webkit-scrollbar-track {
    background: transparent;
}

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

.history-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 16px 0 8px 0;
    padding: 0 8px;
}

.chat-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 16px;
}

.chat-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    background: transparent;
    border: none;
    width: 100%;
    text-align: left;
}

.chat-item:hover {
    background: var(--bg-light);
}

.chat-item.active {
    background: var(--bg-light);
    font-weight: 600;
}

.chat-item-icon {
    font-size: 18px;
    flex-shrink: 0;
}

.chat-item-content {
    flex: 1;
    min-width: 0;
}

.chat-item-title {
    font-size: 14px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-item-time {
    font-size: 11px;
    color: var(--text-secondary);
}

.chat-item-actions {
    display: none;
    gap: 4px;
}

.chat-item:hover .chat-item-actions {
    display: flex;
}

.chat-item-action {
    padding: 4px;
    background: transparent;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.chat-item-action:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.sidebar-footer {
    border-top: 1px solid var(--border-color);
    padding: 16px;
    position: relative;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.2s ease;
}

.user-profile:hover {
    background: var(--bg-light);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-color);
}

.user-info {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-email {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-menu-btn {
    padding: 8px;
    background: transparent;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.user-menu-btn:hover {
    background: var(--bg-light);
}

.user-dropdown {
    display: none;
    position: absolute;
    bottom: 100%;
    left: 16px;
    right: 16px;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    margin-bottom: 8px;
    padding: 8px;
    z-index: 1000;
}

.user-dropdown.show {
    display: block;
    animation: slideUp 0.2s ease;
}

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

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 12px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-primary);
    cursor: pointer;
    transition: background 0.2s ease;
    text-align: left;
}

.dropdown-item:hover {
    background: var(--bg-light);
}

/* Main Chat Area */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    max-width: 1000px;
    width: 100%;
    margin: 0 auto;
}

.chat-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
}

.mobile-menu-btn {
    display: none;
    padding: 8px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--text-secondary);
}

.mobile-menu-btn:hover {
    background: var(--bg-light);
}

.chat-title {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.header-logo {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.chat-actions {
    display: flex;
    gap: 8px;
}

.action-btn {
    padding: 8px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

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

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.chat-messages::-webkit-scrollbar {
    width: 8px;
}

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

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 20px;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.welcome-logo {
    width: 100px;
    height: 100px;
    margin-bottom: 24px;
    animation: bounce 2s infinite;
}

.welcome-screen h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.welcome-screen p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.suggestion-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    max-width: 600px;
    width: 100%;
}

.suggestion-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
}

.suggestion-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.suggestion-icon {
    font-size: 24px;
}

.message {
    display: flex;
    gap: 16px;
    animation: messageSlideIn 0.3s ease;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 20px;
    background: var(--bg-light);
    border: 2px solid var(--border-color);
}

.message.user .message-avatar {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
}

.message.bot .message-avatar {
    padding: 6px;
}

.message.bot .message-avatar img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 50%;
}

.message-content {
    max-width: 70%;
    padding: 16px 20px;
    border-radius: var(--radius-lg);
    line-height: 1.6;
    font-size: 15px;
}

.message.user .message-content {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-bottom-right-radius: 4px;
}

.message.bot .message-content {
    background: var(--bg-white);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 4px;
}

.loading-container {
    display: flex;
    gap: 8px;
    padding: 8px 0;
}

.loading-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary-color);
    animation: loadingBounce 1.4s infinite ease-in-out both;
}

.loading-dot:nth-child(1) { animation-delay: -0.32s; }
.loading-dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes loadingBounce {
    0%, 80%, 100% { transform: scale(0); opacity: 0.5; }
    40% { transform: scale(1); opacity: 1; }
}

.chat-input-container {
    padding: 24px;
    background: var(--bg-white);
    border-top: 1px solid var(--border-color);
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-light);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    transition: all 0.3s ease;
}

.input-wrapper:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

#userInput {
    flex: 1;
    max-height: 200px;
    padding: 8px 0;
    border: none;
    background: transparent;
    font-size: 15px;
    font-family: inherit;
    color: var(--text-primary);
    resize: none;
    outline: none;
}

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

.send-btn {
    padding: 10px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.send-btn:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: scale(1.1);
}

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

.input-footer {
    margin-top: 12px;
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
}

.error-message {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: #fee;
    border: 1px solid #fcc;
    border-radius: var(--radius-md);
    color: #c33;
    font-size: 14px;
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1024px) {
    .login-container {
        grid-template-columns: 1fr;
    }

    .features-section {
        display: none;
    }
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: 1000;
        transform: translateX(-100%);
    }

    .sidebar.show {
        transform: translateX(0);
        box-shadow: var(--shadow-xl);
    }

    .mobile-menu-btn {
        display: block;
    }

    .chat-container {
        max-width: 100%;
    }

    .message-content {
        max-width: 85%;
    }

    .suggestion-cards {
        grid-template-columns: 1fr;
    }

    .login-card {
        padding: 32px 24px;
    }
}

@media (max-width: 480px) {
    .chat-header {
        padding: 12px 16px;
    }

    .chat-messages {
        padding: 16px;
    }

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

    .message-avatar {
        width: 32px;
        height: 32px;
        font-size: 16px;
    }

    .message-content {
        font-size: 14px;
        padding: 12px 16px;
    }
	
	
		/* Spinner animation for buttons */
	.spinner {
		animation: spin 1s linear infinite;
	}

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

	/* Disabled button state */
	button:disabled {
		opacity: 0.6;
		cursor: not-allowed;
	}
	
	/* Typing Indicator */
	.typing-indicator .message-content {
		padding: 16px 20px;
	}

	.typing-dots {
		display: flex;
		gap: 6px;
		align-items: center;
	}

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

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

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

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

	/* Sidebar hidden by default for non-logged users */
	.sidebar {
		transition: transform 0.3s ease;
	}

	@media (max-width: 768px) {
		.sidebar {
			position: fixed;
			left: 0;
			top: 0;
			height: 100vh;
			z-index: 1000;
			transform: translateX(-100%);
		}
		
		.sidebar.show {
			transform: translateX(0);
		}
	}	
	
}