/* RAG_UI Dark Theme - Modern ChatGPT-like design */

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a24;
    --bg-chat: #16161f;
    --bg-message-user: #2563eb;
    --bg-message-assistant: #1e1e2a;
    --border-color: #2a2a3a;
    --border-light: #3a3a4a;
    --text-primary: #e5e5e5;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent-primary: #3b82f6;
    --accent-hover: #2563eb;
    --accent-glow: rgba(59, 130, 246, 0.2);
    --success-color: #22c55e;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);
}

* {
    box-sizing: border-box;
}

html, body {
   /* height: 100%;*/
    margin: 0;
    padding: 0;
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
}

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

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

/* Navbar Styling */
.navbar {
    background: var(--bg-secondary) !important;
    border-bottom: 1px solid var(--border-color) !important;
    box-shadow: var(--shadow-lg);
    padding: 12px 0;
}

.navbar-brand {
    color: var(--text-primary) !important;
    font-weight: 600;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar-brand i {
    font-size: 1.4rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
    padding: 8px 16px !important;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.nav-link:hover {
    color: var(--text-primary) !important;
    background: rgba(255, 255, 255, 0.05);
}

.nav-link.active,
.nav-link:focus {
    color: var(--accent-primary) !important;
}

.navbar-toggler {
    border-color: var(--border-color) !important;
}

.navbar-toggler-icon {
    filter: invert(1);
}

/* Container */
.container {
    max-width: 100%;
    padding: 0;
}

main.pb-3 {
    padding-bottom: 0 !important;
}

/* Footer */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color) !important;
    color: var(--text-muted);
    padding: 16px 0;
}

/* Form Controls */
.form-control {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 12px;
    padding: 12px 16px;
    font-size: 15px;
    transition: all 0.2s ease;
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-control:focus {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
    color: var(--text-primary);
    outline: none;
}

/* Buttons */
.btn-primary {
    background: var(--gradient-primary);
    border: none;
    border-radius: 12px;
    padding: 12px 24px;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Cards */
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    color: var(--text-primary);
}

.card-header {
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

/* Links */
a {
    color: var(--accent-primary);
    text-decoration: none;
}

a:hover {
    color: var(--accent-hover);
}

/* Alerts */
.alert {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
}

.alert-danger {
    border-color: rgba(239, 68, 68, 0.3);
    background: rgba(239, 68, 68, 0.1);
}

.alert-success {
    border-color: rgba(34, 197, 94, 0.3);
    background: rgba(34, 197, 94, 0.1);
}

/* Badge */
.badge {
    font-weight: 500;
    padding: 4px 8px;
    border-radius: 6px;
}

/* Utility Classes */
.text-muted {
    color: var(--text-muted) !important;
}

/* Home Page Styling */
.hero-section {
    text-align: center;
    padding: 80px 20px;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero-section h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-section p {
    color: var(--text-secondary);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 32px;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--gradient-primary);
    color: white;
    padding: 16px 32px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1.1rem;
    text-decoration: none;
    transition: all 0.2s ease;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
    color: white;
}