/* ============================================
   MIND-MATCH FRONTEND - MAIN STYLES
   Based on mind-match.app design
   ============================================ */

:root {
    /* Primary Colors - Purple/Blue Theme */
    --primary-purple: #6B46C1;
    --primary-blue: #4A90E2;
    --primary-dark: #1a1b2e;
    --primary-darker: #0f1015;
    
    /* Accent Colors */
    --accent-cyan: #00D9FF;
    --accent-purple-light: #9D7FEA;
    --accent-pink: #E94C89;
    --accent-green: #00C48C;
    
    /* Neutrals */
    --text-primary: #FFFFFF;
    --text-secondary: #B8C1E0;
    --text-muted: #6B7794;
    --background-card: rgba(255, 255, 255, 0.05);
    --background-card-hover: rgba(255, 255, 255, 0.08);
    --border-color: rgba(255, 255, 255, 0.1);
    
    /* Semantic Colors */
    --success: #00C48C;
    --warning: #FFB020;
    --error: #E94C89;
    --info: #4A90E2;
    
    /* Shadows */
    --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);
    --shadow-glow: 0 0 20px rgba(107, 70, 193, 0.5);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
}

/* ============================================
   BASE STYLES
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--primary-darker) 0%, var(--primary-dark) 50%, #16213e 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Animated gradient background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(107, 70, 193, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(74, 144, 226, 0.15) 0%, transparent 50%);
    z-index: -1;
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.1); }
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    color: var(--text-secondary);
    line-height: 1.7;
}

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

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

/* ============================================
   TOP NAVIGATION
   ============================================ */

.top-nav {
    position: fixed;
    top: 0;
    left: 280px;
    right: 0;
    height: 70px;
    background: rgba(26, 27, 46, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 999;
    transition: all var(--transition-base);
}

.top-nav.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-logo {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-purple), var(--primary-blue));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.nav-title {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-purple), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--background-card);
}

.nav-link.active {
    color: var(--accent-cyan);
    background: rgba(0, 217, 255, 0.1);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary-purple), var(--primary-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.nav-avatar:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-sm);
}

/* Back Button */
.back-button {
    display: none;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--background-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.back-button:hover {
    background: var(--background-card-hover);
    color: var(--text-primary);
    border-color: var(--primary-purple);
}

.back-button.active {
    display: flex;
}

/* ============================================
   SIDEBAR / MOBILE MENU
   ============================================ */

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    background: rgba(26, 27, 46, 0.95);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-color);
    padding: var(--spacing-xl) var(--spacing-lg);
    overflow-y: auto;
    transition: transform var(--transition-base);
    z-index: 1000;
}

.sidebar.mobile-hidden {
    transform: translateX(-100%);
}

.sidebar-close-btn {
    display: none;
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--background-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all var(--transition-fast);
    z-index: 10;
}

.sidebar-close-btn:hover {
    background: var(--background-card-hover);
    color: var(--text-primary);
    border-color: var(--primary-purple);
}

.sidebar-section {
    margin-bottom: var(--spacing-xl);
}

.sidebar-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.sidebar-items {
    list-style: none;
}

.sidebar-item {
    margin-bottom: var(--spacing-sm);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 500;
    transition: all var(--transition-fast);
}

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

.sidebar-link.active {
    background: rgba(107, 70, 193, 0.2);
    color: var(--accent-cyan);
    border-left: 3px solid var(--primary-purple);
}

.sidebar-icon {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
}

/* Sidebar overlay for mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

.sidebar-overlay.active {
    display: block;
}

/* ============================================
   MAIN CONTENT AREA
   ============================================ */

.main-content {
    margin-top: 70px;
    margin-left: 280px;
    padding: var(--spacing-2xl);
    min-height: calc(100vh - 70px);
    transition: margin-left var(--transition-base);
}

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

.content-header {
    margin-bottom: var(--spacing-2xl);
}

.content-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.content-subtitle {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

/* ============================================
   CARDS
   ============================================ */

.card {
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
}

.card:hover {
    background: var(--background-card-hover);
    border-color: var(--primary-purple);
    box-shadow: var(--shadow-md);
}

.card-header {
    margin-bottom: var(--spacing-lg);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.card-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.card-body {
    color: var(--text-secondary);
}

.card-footer {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

/* App Cards */
.app-card {
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(107, 70, 193, 0.1), rgba(74, 144, 226, 0.1));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.app-card:hover::before {
    opacity: 1;
}

.app-icon {
    width: 100%;
    /*height: 60px;*/
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary-purple), var(--primary-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary-purple), var(--primary-blue));
    color: white;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: var(--background-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--background-card-hover);
    border-color: var(--primary-purple);
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-danger {
    background: var(--error);
    color: white;
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1.125rem;
}

/* ============================================
   FORMS
   ============================================ */

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 3px rgba(107, 70, 193, 0.2);
}

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

.form-text {
    display: block;
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.form-check-input {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* ============================================
   MODALS
   ============================================ */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-lg);
}

.modal.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: var(--primary-dark);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-sm);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    color: var(--error);
    transform: rotate(90deg);
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-footer {
    padding: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

/* ============================================
   ALERTS
   ============================================ */

.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.alert-success {
    background: rgba(0, 196, 140, 0.2);
    border: 1px solid var(--success);
    color: var(--success);
}

.alert-error {
    background: rgba(233, 76, 137, 0.2);
    border: 1px solid var(--error);
    color: var(--error);
}

.alert-warning {
    background: rgba(255, 176, 32, 0.2);
    border: 1px solid var(--warning);
    color: var(--warning);
}

.alert-info {
    background: rgba(74, 144, 226, 0.2);
    border: 1px solid var(--info);
    color: var(--info);
}

/* ============================================
   BADGES
   ============================================ */

.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-primary {
    background: rgba(107, 70, 193, 0.2);
    color: var(--primary-purple);
}

.badge-success {
    background: rgba(0, 196, 140, 0.2);
    color: var(--success);
}

.badge-warning {
    background: rgba(255, 176, 32, 0.2);
    color: var(--warning);
}

/* ============================================
   ANIMATIONS
   ============================================ */

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

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

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

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 992px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-home {
        display: none;
    }
    
    /* Show sidebar close button on mobile */
    .sidebar-close-btn {
        display: flex;
    }
    
    /* On mobile, navbar goes full width */
    .top-nav {
        left: 0;
    }
    
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.mobile-visible,
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        padding: var(--spacing-lg);
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.25rem; }
}

@media (min-width: 993px) {
    /* Desktop styles are already set in main rules */
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 var(--spacing-md);
    }
    
    .main-content {
        padding: var(--spacing-md);
    }
    
    .modal-content {
        margin: var(--spacing-md);
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-primary { color: var(--primary-purple); }
.text-success { color: var(--success); }
.text-error { color: var(--error); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }

.flex-column { flex-direction: column; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

/* ============================================
   USER DROPDOWN MENU
   ============================================ */

.nav-user .dropdown-menu {
    background: var(--primary-dark);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 250px;
    padding: var(--spacing-sm) 0;
    margin-top: var(--spacing-sm);
}

.nav-user .dropdown-header {
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-primary);
}

.nav-user .dropdown-header strong {
    display: block;
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.nav-user .dropdown-divider {
    border-color: var(--border-color);
    margin: var(--spacing-sm) 0;
}

.nav-user .dropdown-item {
    color: var(--text-secondary);
    padding: var(--spacing-md) var(--spacing-lg);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
}

.nav-user .dropdown-item:hover {
    background: var(--background-card-hover);
    color: var(--text-primary);
}

.nav-user .dropdown-item:active {
    background: var(--background-card-hover);
    color: var(--text-primary);
}

.nav-user .dropdown-item.text-danger {
    color: var(--error);
}

.nav-user .dropdown-item.text-danger:hover {
    background: rgba(233, 76, 137, 0.1);
    color: var(--error);
}

.nav-user .dropdown-item i {
    width: 20px;
    text-align: center;
}

/* ============================================
   SETTINGS MODAL TABS
   ============================================ */

.settings-tab-pane {
    display: none;
}

.settings-tab-pane.show {
    display: block;
    animation: fadeIn 0.3s ease;
}

#settingsModal .nav-tabs {
    border-bottom: 2px solid var(--border-color);
}

#settingsModal .nav-tabs .nav-link {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    font-weight: 600;
    position: relative;
    transition: all var(--transition-fast);
    border-radius: 0;
}

#settingsModal .nav-tabs .nav-link:hover {
    color: var(--text-primary);
    background: var(--background-card);
}

#settingsModal .nav-tabs .nav-link.active {
    color: var(--primary-purple);
    background: none;
}

#settingsModal .nav-tabs .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-purple), var(--primary-blue));
}