app/static/css/style.css

/* app/static/css/style.css */

:root {
    --primary-color: #2962ff;
    --primary-light: #768fff;
    --primary-dark: #0039cb;
    --secondary-color: #fd7e14;
    --background-color: #f5f7fb;
    --chat-bg: #ffffff;
    --text-primary: #2c3e50;
    --text-secondary: #34495e;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --gradient-1: linear-gradient(135deg, #6B73FF 0%, #000DFF 100%);
    --gradient-2: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-3: linear-gradient(45deg, #2962ff, #768fff);
    --error-color: #dc3545;
    --success-color: #28a745;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--background-color);
    height: 100vh;
    overflow: hidden;
}

/* Main Container */
.chat-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Styling */
.chat-header {
    background: var(--gradient-1);
    padding: 15px 20px;
    color: white;
    box-shadow: 0 2px 10px var(--shadow-color);
    z-index: 1000;
}

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

.logo {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-content h1 {
    font-size: 1.2rem;
    font-weight: 600;
}

/* Main Content Layout */
.main-content {
    display: flex;
    height: calc(100vh - 60px);
    overflow: hidden;
}

/* Categories Sidebar */
.categories-sidebar {
    width: 300px;
    background: white;
    padding: 20px;
    overflow-y: auto;
    border-right: 1px solid rgba(0,0,0,0.1);
}

.categories-sidebar h2 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-light);
}

.categories-accordion {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.category-item {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.category-header {
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    background: linear-gradient(145deg, #ffffff, #f8f9fa);
    transition: all 0.3s ease;
}

.category-header:hover {
    background: linear-gradient(145deg, #f8f9fa, #e9ecef);
}

.category-header span {
    font-weight: 500;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.arrow-icon {
    width: 20px;
    height: 20px;
    fill: var(--text-primary);
    transition: transform 0.3s ease;
}

.category-item.active .arrow-icon {
    transform: rotate(180deg);
}

.category-content {
    display: none;
    padding: 12px;
    background: var(--background-color);
}

.category-item.active .category-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.category-content button {
    background: white;
    border: none;
    padding: 12px 16px;
    text-align: left;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-primary);
    font-size: 0.9rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    position: relative;
    overflow: hidden;
    z-index: 0;
}

.category-content button::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 100%;
    background: var(--primary-light); /* subtle hover background */
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
    border-radius: 8px;
}

.category-content button span {
    position: relative;
    z-index: 1;
    transition: color 0.3s ease;
    color: var(--text-primary);
}

.category-content button:hover::before {
    opacity: 1;
}

.category-content button:hover span {
    color: white;
}


/* Chat Section */
.chat-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--background-color);
}

.chat-messages {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* Message Styling */
.message {
    max-width: 80%;
    animation: fadeIn 0.3s ease;
}

.message.user {
    margin-left: auto;
}

.message-content {
    padding: 15px;
    border-radius: 12px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    position: relative;
}

.message.system .message-content {
    background: white;
    color: var(--text-primary);
    text-shadow: 0 1px 1px rgba(0,0,0,0.03);
    border-radius: 12px 12px 12px 0;
}

.message.user .message-content {
    background: var(--gradient-2);
    color: white;
    border-radius: 12px 12px 0 12px;
}

/* Welcome Message */
.welcome-message {
    padding: 15px;
    background: white;
    color: var(--text-primary);
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.welcome-message h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.2rem;
}

/* Suggestions Styling */
.suggestions {
    margin: 15px 0;
    padding: 15px;
    background: white;
    color: var(--text-primary);
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.suggestions p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

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

.suggestion-btn {
    background: var(--background-color);
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    color: var(--primary-color);
    position: relative;
    overflow: hidden;
}

.suggestion-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-3);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.suggestion-btn span {
    position: relative;
    z-index: 1;
}

.suggestion-btn:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.suggestion-btn:hover::before {
    opacity: 1;
}

.chat-input-container {
    background-color: #121212; /* very dark gray (softer than pure black) */
    border-top: 1px solid #222222; /* dark border */
    color: white;
}

.chat-input-form {
    display: flex;
    gap: 12px;
    background: #1e1e1e; /* dark gray background */
    padding: 5px;
    border-radius: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.7); /* stronger dark shadow */
}

.chat-input-form input {
    flex: 1;
    padding: 12px 20px; /* keep original padding */
    border: 2px solid #444444; /* dark border */
    border-radius: 25px;
    font-size: 0.95rem;
    background-color: #121212; /* dark input background */
    color: white;
    transition: all 0.3s ease;
}

.chat-input-form input::placeholder {
    color: #888888; /* lighter placeholder */
}

.chat-input-form input:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(41, 98, 255, 0.5); /* stronger focus glow */
}

.chat-input-form button {
    background: var(--gradient-1);
    color: white;
    border: none;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.chat-input-form button:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

/* Loading Animation */
.typing-indicator {
    display: flex;
    gap: 8px;
    padding: 10px;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--primary-light);
    border-radius: 50%;
    animation: bounce 1s infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* List Styling */
.response-list {
    margin-top: 10px;
    list-style: none;
}

.response-list li {
    margin: 8px 0;
    padding: 10px 15px;
    background: rgba(0,0,0,0.03);
    border-radius: 8px;
    position: relative;
    padding-left: 25px;
}

.response-list li::before {
    content: '•';
    position: absolute;
    left: 10px;
    color: var(--primary-color);
}

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

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

::-webkit-scrollbar-thumb {
    background: rgba(0,0,0,0.2);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0,0,0,0.3);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Error State */
.error {
    color: var(--error-color);
    padding: 10px;
    border-radius: 8px;
    background: rgba(220, 53, 69, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }

    .categories-sidebar {
        width: 100%;
        max-height: 40vh;
    }

    .chat-section {
        height: 60vh;
    }

    .message {
        max-width: 90%;
    }

    .chat-input-form input {
        padding: 10px 15px;
    }

    .chat-input-form button {
        width: 40px;
        height: 40px;
    }

    .suggestion-buttons {
        flex-direction: column;
    }

    .suggestion-btn {
        width: 100%;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --background-color: #1a1a1a;
        --chat-bg: #2d2d2d;
        --text-primary: #ffffff;
        --text-secondary: #cccccc;
    }

    .categories-sidebar,
    .category-content button,
    .message.system .message-content,
    .suggestions,
    .welcome-message {
        background: #2d2d2d;
        color: var(--text-primary);
    }

    .category-header {
        background: #2b2b2b;
    }

    .chat-input-form input {
        background: #2d2d2d;
        border-color: #3d3d3d;
        color: white;
    }

    /* CATEGORY SECTION COLOR UPDATES */
    .category-item {
        background: #232323; /* slightly darker for distinction */
        box-shadow: 0 2px 8px rgba(255, 255, 255, 0.05);
    }

    .category-header {
        background: linear-gradient(145deg, #2b2b2b, #222222);
        color: var(--text-primary);
    }

    .category-header:hover {
        background: linear-gradient(145deg, #222222, #2b2b2b);
    }

    .category-header span {
        color: var(--text-primary);
    }

    .arrow-icon {
        fill: var(--text-secondary);
    }

    .category-content {
        background: #1f1f1f;
    }

    .category-content button {
        background: #2d2d2d;
        color: var(--text-primary);
        box-shadow: 0 2px 4px rgba(255, 255, 255, 0.03);
    }

    .category-content button::before {
        background: rgba(118, 143, 255, 0.15); /* subtle blue hover */
    }

    .category-content button:hover span {
        color: white;
    }

    .logo {
        color: #ff4081;
        fill: #ff4081;
    }
}