/* ============================================
   CHATLO — Premium Design System
   A clean, modern, professional design system
   inspired by Chatlo.io's UI/UX.
   ============================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */
:root {
    /* Brand Colors */
    --brand-primary: #E53E3E;
    --brand-primary-light: #FC8181;
    --brand-primary-dark: #C53030;

    /* Accent Colors */
    --accent-blue: #4F46E5;
    --accent-blue-light: #818CF8;
    --accent-blue-dark: #3730A3;
    --accent-purple: #7C3AED;
    --accent-teal: #14B8A6;
    --accent-orange: #F97316;

    /* Neutral Colors */
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;

    /* Functional Colors */
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    --info: #3B82F6;

    /* Background Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    --bg-dark: #111827;
    --bg-gradient: linear-gradient(135deg, #EEF2FF 0%, #F9FAFB 50%, #FFF1F2 100%);

    /* Text Colors */
    --text-primary: #111827;
    --text-secondary: #4B5563;
    --text-tertiary: #9CA3AF;
    --text-inverse: #FFFFFF;

    /* Borders */
    --border-light: #F3F4F6;
    --border-medium: #E5E7EB;
    --border-dark: #D1D5DB;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.02);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.03), 0 1px 2px rgba(0, 0, 0, 0.02);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.04), 0 2px 4px rgba(0, 0, 0, 0.02);
    --shadow-lg: 0 10px 24px rgba(0, 0, 0, 0.05), 0 4px 10px rgba(0, 0, 0, 0.03);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.06), 0 10px 15px rgba(0, 0, 0, 0.04);
    --shadow-card: 0 2px 8px rgba(0,0,0,0.03), 0 1px 2px rgba(0,0,0,0.02);
    --shadow-card-hover: 0 12px 30px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.04);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-24: 96px;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Z-Index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-overlay: 300;
    --z-modal: 400;
    --z-toast: 500;
    --z-widget: 999;
}

/* ============================================
   Reset & Base Styles
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}
a:hover {
    color: var(--accent-blue-dark);
}

img {
    max-width: 100%;
    height: auto;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.25;
    color: var(--text-primary);
}

h1 { font-size: 3rem; letter-spacing: -0.025em; }
h2 { font-size: 2.25rem; letter-spacing: -0.02em; }
h3 { font-size: 1.5rem; letter-spacing: -0.015em; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    color: var(--text-secondary);
    line-height: 1.75;
}

.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-muted { color: var(--text-tertiary); }
.text-center { text-align: center; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

/* ============================================
   Layout Utilities
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-sm { max-width: 800px; margin: 0 auto; padding: 0 var(--space-6); }
.container-lg { max-width: 1400px; margin: 0 auto; padding: 0 var(--space-6); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.w-full { width: 100%; }
.h-full { height: 100%; }
.hidden { display: none; }

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 10px 20px;
    font-family: var(--font-family);
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.5;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    white-space: nowrap;
}

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

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: var(--gray-900);
    color: var(--text-inverse);
    border-color: var(--gray-900);
}
.btn-primary:hover {
    background: var(--gray-800);
    color: var(--text-inverse);
}

.btn-secondary {
    background: var(--bg-primary);
    color: var(--text-primary);
    border-color: var(--border-medium);
}
.btn-secondary:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

.btn-accent {
    background: var(--accent-blue);
    color: var(--text-inverse);
}
.btn-accent:hover {
    background: var(--accent-blue-dark);
    color: var(--text-inverse);
}

.btn-danger {
    background: var(--error);
    color: var(--text-inverse);
}
.btn-danger:hover {
    background: #DC2626;
    color: var(--text-inverse);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: none;
}
.btn-ghost:hover {
    background: var(--gray-100);
    color: var(--text-primary);
    box-shadow: none;
    transform: none;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1rem;
    border-radius: var(--radius-lg);
}

.btn-icon {
    padding: 8px;
    border-radius: var(--radius-md);
}

/* ============================================
   Cards
   ============================================ */
.card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    transition: all var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-card-hover);
    border-color: var(--border-medium);
}

.card-flat {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.card-body {
    flex: 1;
}

/* ============================================
   Forms & Inputs
   ============================================ */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.form-input,
.form-control,
.form-textarea,
.form-select {
    width: 100%;
    padding: 10px 14px;
    font-family: var(--font-family);
    font-size: 0.875rem;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    outline: none;
}

.form-input:focus,
.form-control:focus,
.form-textarea:focus,
.form-select:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-input::placeholder,
.form-control::placeholder,
.form-textarea::placeholder {
    color: var(--text-tertiary);
}

.form-textarea,
textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

select.form-control {
    appearance: auto;
}

.form-hint {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: var(--space-1);
}

.form-error {
    font-size: 0.75rem;
    color: var(--error);
    margin-top: var(--space-1);
}

/* Checkbox & Toggle */
.toggle {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--gray-300);
    border-radius: var(--radius-full);
    transition: var(--transition-normal);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: var(--transition-normal);
}

.toggle input:checked + .toggle-slider {
    background-color: var(--accent-blue);
}

.toggle input:checked + .toggle-slider::before {
    transform: translateX(20px);
}

/* ============================================
   Modern UI Utilities (Glassmorphism & Lift)
   ============================================ */
.glass-panel {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}

.hover-lift {
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.form-group-modern {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    transition: all var(--transition-fast);
}
.form-group-modern:focus-within {
    border-color: var(--accent-blue-light);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.05);
}

.text-gradient {
    background-image: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

/* ============================================
   Badge / Tags
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    gap: var(--space-1);
}

.badge-success {
    background: #ECFDF5;
    color: #059669;
}

.badge-warning {
    background: #FFFBEB;
    color: #D97706;
}

.badge-error {
    background: #FEF2F2;
    color: #DC2626;
}

.badge-info {
    background: #EFF6FF;
    color: #2563EB;
}

.badge-neutral {
    background: var(--gray-100);
    color: var(--gray-600);
}

/* ============================================
   Navigation / Header
   ============================================ */
.navbar {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
    padding: 0 var(--space-6);
    height: 64px;
    display: flex;
    align-items: center;
}

.navbar-inner {
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
}

.navbar-brand:hover {
    color: var(--text-primary);
}

.navbar-brand-logo {
    width: 32px;
    height: 32px;
    background: var(--brand-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 900;
    font-size: 1.125rem;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    list-style: none;
}

.navbar-nav a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    padding: var(--space-2) 0;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
}

.navbar-nav a:hover,
.navbar-nav a.active {
    color: var(--text-primary);
    border-bottom-color: var(--text-primary);
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

/* ============================================
   Sidebar (Dashboard)
   ============================================ */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--bg-primary);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: var(--z-sticky);
    overflow-y: auto;
}

.sidebar-header {
    padding: var(--space-5) var(--space-5);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.sidebar-nav {
    padding: var(--space-3);
    flex: 1;
}

.sidebar-section {
    margin-bottom: var(--space-4);
}

.sidebar-section-title {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-2) var(--space-3);
    margin-bottom: var(--space-1);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.sidebar-link:hover {
    background: var(--gray-100);
    color: var(--text-primary);
}

.sidebar-link.active {
    background: var(--gray-100);
    color: var(--text-primary);
    font-weight: 600;
}

.sidebar-link svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: var(--space-4);
    border-top: 1px solid var(--border-light);
}

.main-content {
    flex: 1;
    margin-left: 260px;
    background: var(--bg-secondary);
    min-height: 100vh;
}

.page-header {
    padding: var(--space-6) var(--space-8);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-light);
}

.page-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
}

.page-header p {
    font-size: 0.875rem;
    margin-top: var(--space-1);
}

.page-body {
    padding: var(--space-6) var(--space-8);
}

/* ============================================
   Stats Cards
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}

.stat-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
    transition: all var(--transition-normal);
}

.stat-card:hover {
    box-shadow: var(--shadow-card-hover);
}

.stat-card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-3);
    font-size: 1.25rem;
}

.stat-card-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: var(--space-1);
}

.stat-card-label {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

/* ============================================
   Agent Cards
   ============================================ */
.agent-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
    transition: all var(--transition-normal);
    cursor: pointer;
    text-decoration: none;
    display: block;
    color: inherit;
}

.agent-card:hover {
    box-shadow: var(--shadow-card-hover);
    border-color: var(--accent-blue-light);
    transform: translateY(-2px);
    color: inherit;
}

.agent-card-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.agent-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.agent-card-name {
    font-size: 1rem;
    font-weight: 600;
}

.agent-card-meta {
    display: flex;
    gap: var(--space-4);
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

.agent-card-meta span {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

/* ============================================
   Tabs
   ============================================ */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-light);
    gap: var(--space-1);
    margin-bottom: var(--space-6);
}

.tab {
    padding: var(--space-3) var(--space-5);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-tertiary);
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
    font-family: var(--font-family);
}

.tab:hover {
    color: var(--text-primary);
}

.tab.active {
    color: var(--accent-blue);
    border-bottom-color: var(--accent-blue);
    font-weight: 600;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ============================================
   Alerts / Toast Messages
   ============================================ */
.alert {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
    animation: slideDown 0.3s ease;
}

.alert-success {
    background: #ECFDF5;
    color: #065F46;
    border: 1px solid #A7F3D0;
}

.alert-error {
    background: #FEF2F2;
    color: #991B1B;
    border: 1px solid #FECACA;
}

.alert-warning {
    background: #FFFBEB;
    color: #92400E;
    border: 1px solid #FDE68A;
}

.alert-info {
    background: #EFF6FF;
    color: #1E40AF;
    border: 1px solid #BFDBFE;
}

.alert-close {
    margin-left: auto;
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: inherit;
    opacity: 0.5;
    padding: 0;
}

.alert-close:hover {
    opacity: 1;
}

/* ============================================
   Table
   ============================================ */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    padding: var(--space-3) var(--space-4);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--gray-50);
    border-bottom: 1px solid var(--border-light);
}

td {
    padding: var(--space-3) var(--space-4);
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-secondary);
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: var(--gray-50);
}

/* ============================================
   Loading Spinner
   ============================================ */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--gray-200);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.spinner-lg {
    width: 36px;
    height: 36px;
    border-width: 3px;
}

/* ============================================
   Chat Styles
   ============================================ */
.chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 64px);
    background: var(--bg-primary);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.chat-bubble {
    max-width: 75%;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-xl);
    font-size: 0.9375rem;
    line-height: 1.6;
    animation: fadeIn 0.3s ease;
}

.chat-bubble.user {
    background: var(--accent-blue);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: var(--radius-sm);
}

.chat-bubble.assistant {
    background: var(--gray-100);
    color: var(--text-primary);
    align-self: flex-start;
    border-bottom-left-radius: var(--radius-sm);
}

.chat-input-area {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--border-light);
    background: var(--bg-primary);
}

.chat-input-wrapper {
    display: flex;
    gap: var(--space-3);
    align-items: flex-end;
}

.chat-input {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-xl);
    font-family: var(--font-family);
    font-size: 0.9375rem;
    outline: none;
    resize: none;
    max-height: 120px;
    transition: border-color var(--transition-fast);
}

.chat-input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.chat-send-btn {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--accent-blue);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.chat-send-btn:hover {
    background: var(--accent-blue-dark);
    transform: scale(1.05);
}

.chat-send-btn:disabled {
    background: var(--gray-300);
    cursor: not-allowed;
    transform: none;
}

.typing-indicator {
    display: flex;
    gap: 4px;
    padding: var(--space-3) var(--space-4);
    align-self: flex-start;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--gray-400);
    border-radius: 50%;
    animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) { animation-delay: 0s; }
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

/* ============================================
   Empty State
   ============================================ */
.empty-state {
    text-align: center;
    padding: var(--space-16) var(--space-8);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
}

.empty-state h3 {
    margin-bottom: var(--space-2);
}

.empty-state p {
    margin-bottom: var(--space-6);
}

/* ============================================
   Color Picker
   ============================================ */
.color-picker-group {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.color-swatch {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.color-swatch:hover,
.color-swatch.active {
    border-color: var(--gray-900);
    transform: scale(1.15);
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-8px); }
}

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

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.animate-fade-in { animation: fadeIn 0.4s ease; }
.animate-slide-down { animation: slideDown 0.3s ease; }
.animate-pulse { animation: pulse 2s infinite; }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }

    .container { padding: 0 var(--space-4); }

    .grid-4, .grid-3, .grid-2 {
        grid-template-columns: 1fr;
    }

    .sidebar {
        display: none;
    }

    .main-content {
        margin-left: 0;
    }

    .page-body {
        padding: var(--space-4);
    }

    .navbar-nav {
        display: none;
    }

    .chat-bubble {
        max-width: 90%;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .btn-lg {
        padding: 12px 20px;
        font-size: 0.875rem;
    }
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}