/* MindCohort - Main Stylesheet */
/* Teal & Purple Theme - Mobile First */

:root {
    /* Primary Colors */
    --teal-50: #f0fdfa;
    --teal-100: #ccfbf1;
    --teal-200: #99f6e4;
    --teal-300: #5eead4;
    --teal-400: #2dd4bf;
    --teal-500: #14b8a6;
    --teal-600: #0d9488;
    --teal-700: #0f766e;
    --teal-800: #115e59;
    --teal-900: #134e4a;
    
    /* Secondary Colors */
    --purple-50: #faf5ff;
    --purple-100: #f3e8ff;
    --purple-200: #e9d5ff;
    --purple-300: #d8b4fe;
    --purple-400: #c084fc;
    --purple-500: #a855f7;
    --purple-600: #9333ea;
    --purple-700: #7c3aed;
    --purple-800: #6b21a8;
    --purple-900: #581c87;
    
    /* Neutrals */
    --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;
    
    /* Semantic Colors */
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --error: #ef4444;
    --error-light: #fee2e2;
    --info: #3b82f6;
    --info-light: #dbeafe;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--teal-600) 0%, var(--purple-700) 100%);
    --gradient-light: linear-gradient(135deg, var(--teal-400) 0%, var(--purple-500) 100%);
    --gradient-subtle: linear-gradient(135deg, var(--teal-50) 0%, var(--purple-50) 100%);
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--gray-50);
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--gray-900);
}

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

@media (min-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }
}

p { margin-bottom: var(--space-md); }

a {
    color: var(--teal-600);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--teal-700);
}

/* Layout */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

@media (min-width: 768px) {
    .container { padding: 0 var(--space-xl); }
}

.page-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
    padding: var(--space-lg) 0;
}

/* Header */
.header {
    background: white;
    border-bottom: 1px solid var(--gray-200);
    padding: var(--space-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: none;
    gap: var(--space-lg);
}

@media (min-width: 768px) {
    .nav-menu { display: flex; }
}

.nav-link {
    color: var(--gray-600);
    font-weight: 500;
    padding: var(--space-sm) 0;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--teal-600);
}

.mobile-menu-btn {
    display: flex;
    padding: var(--space-sm);
    background: none;
    border: none;
    cursor: pointer;
}

@media (min-width: 768px) {
    .mobile-menu-btn { display: none; }
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    inset: 0;
    background: white;
    z-index: 200;
    padding: var(--space-xl);
    flex-direction: column;
    gap: var(--space-md);
}

.mobile-menu.open {
    display: flex;
}

.mobile-menu-close {
    align-self: flex-end;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
}

.mobile-nav-link {
    font-size: 1.25rem;
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--gray-100);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: white;
    color: var(--gray-700);
    border: 2px solid var(--gray-200);
}

.btn-secondary:hover:not(:disabled) {
    border-color: var(--teal-500);
    color: var(--teal-600);
}

.btn-outline {
    background: transparent;
    color: var(--teal-600);
    border: 2px solid var(--teal-600);
}

.btn-outline:hover:not(:disabled) {
    background: var(--teal-600);
    color: white;
}

.btn-ghost {
    background: transparent;
    color: var(--gray-600);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--gray-100);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
}

/* Social Login Buttons */
.btn-google {
    background: white;
    color: var(--gray-700);
    border: 2px solid var(--gray-200);
}

.btn-google:hover {
    background: var(--gray-50);
    border-color: var(--gray-300);
}

.btn-linkedin {
    background: #0077b5;
    color: white;
}

.btn-linkedin:hover {
    background: #005e93;
}

/* Forms */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: var(--space-sm);
}

.form-label.required::after {
    content: '*';
    color: var(--error);
    margin-left: 0.25rem;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    color: var(--gray-800);
    background: white;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--teal-500);
    box-shadow: 0 0 0 3px var(--teal-100);
}

.form-input.error,
.form-select.error {
    border-color: var(--error);
}

.form-input.error:focus {
    box-shadow: 0 0 0 3px var(--error-light);
}

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

.form-hint {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-top: var(--space-xs);
}

.form-error {
    font-size: 0.875rem;
    color: var(--error);
    margin-top: var(--space-xs);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    cursor: pointer;
}

.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    margin-top: 0.125rem;
    accent-color: var(--teal-600);
    cursor: pointer;
}

.form-check-label {
    font-size: 0.95rem;
    color: var(--gray-700);
}

/* Strength Selector */
.strength-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-md);
}

.strength-card {
    padding: var(--space-lg);
    background: white;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
}

.strength-card:hover {
    border-color: var(--teal-400);
    transform: translateY(-2px);
}

.strength-card.selected {
    border-color: var(--teal-600);
    background: var(--teal-50);
}

.strength-card.selected-need {
    border-color: var(--purple-600);
    background: var(--purple-50);
}

.strength-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.strength-name {
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--space-xs);
}

.strength-desc {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* Cards */
.card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.card-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--gray-100);
}

.card-body {
    padding: var(--space-lg);
}

.card-footer {
    padding: var(--space-lg);
    border-top: 1px solid var(--gray-100);
    background: var(--gray-50);
}

/* Track Selector Cards */
.track-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
}

@media (min-width: 768px) {
    .track-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.track-card {
    padding: var(--space-xl);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
    border: 3px solid transparent;
}

.track-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.track-card.selected {
    border-color: var(--teal-600);
    background: var(--gradient-subtle);
}

.track-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
}

.track-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-sm);
}

.track-desc {
    color: var(--gray-600);
    font-size: 0.95rem;
}

/* Session Cards */
.session-card {
    display: flex;
    flex-direction: column;
    padding: var(--space-lg);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

@media (min-width: 640px) {
    .session-card {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

.session-card.priority {
    border-left: 4px solid var(--purple-600);
    background: var(--gradient-subtle);
}

.session-info {
    margin-bottom: var(--space-md);
}

@media (min-width: 640px) {
    .session-info { margin-bottom: 0; }
}

.session-date {
    font-weight: 700;
    color: var(--gray-900);
    font-size: 1.125rem;
}

.session-time {
    color: var(--gray-600);
}

.session-spots {
    font-size: 0.875rem;
    color: var(--teal-600);
    font-weight: 500;
}

.session-priority-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--purple-100);
    color: var(--purple-700);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    margin-top: var(--space-xs);
}

/* Member Cards */
.member-card {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

.member-photo {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    object-fit: cover;
    background: var(--gradient-light);
}

.member-photo-placeholder {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    background: var(--gradient-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: 600;
}

.member-info {
    flex: 1;
}

.member-name {
    font-weight: 600;
    color: var(--gray-900);
}

.member-headline {
    font-size: 0.875rem;
    color: var(--gray-600);
}

.member-strength {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.25rem 0.5rem;
    background: var(--teal-50);
    color: var(--teal-700);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    margin-top: var(--space-xs);
}

/* Alerts / Flash Messages */
.alert {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
}

.alert-success {
    background: var(--success-light);
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background: var(--error-light);
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background: var(--warning-light);
    color: #92400e;
    border: 1px solid #fde68a;
}

.alert-info {
    background: var(--info-light);
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

.alert-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.alert-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

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

/* Rating Stars */
.rating-group {
    margin-bottom: var(--space-lg);
}

.rating-label {
    display: block;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: var(--space-sm);
}

.rating-stars {
    display: flex;
    gap: var(--space-xs);
}

.rating-star {
    font-size: 1.75rem;
    cursor: pointer;
    color: var(--gray-300);
    transition: color var(--transition-fast);
}

.rating-star:hover,
.rating-star.active {
    color: var(--warning);
}

.rating-star.hovered {
    color: var(--warning);
}

/* Dashboard Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

@media (min-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.stat-card {
    padding: var(--space-lg);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-top: var(--space-xs);
}

/* Tables */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.table th,
.table td {
    padding: var(--space-md);
    text-align: left;
    border-bottom: 1px solid var(--gray-100);
}

.table th {
    font-weight: 600;
    color: var(--gray-700);
    background: var(--gray-50);
}

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

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
}

.badge-success {
    background: var(--success-light);
    color: #065f46;
}

.badge-warning {
    background: var(--warning-light);
    color: #92400e;
}

.badge-error {
    background: var(--error-light);
    color: #991b1b;
}

.badge-info {
    background: var(--info-light);
    color: #1e40af;
}

.badge-teal {
    background: var(--teal-100);
    color: var(--teal-700);
}

.badge-purple {
    background: var(--purple-100);
    color: var(--purple-700);
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
    z-index: 300;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal-overlay.open {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.95);
    transition: transform var(--transition-base);
}

.modal-overlay.open .modal {
    transform: scale(1);
}

.modal-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-400);
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--gray-600);
}

.modal-body {
    padding: var(--space-lg);
}

.modal-footer {
    padding: var(--space-lg);
    border-top: 1px solid var(--gray-100);
    display: flex;
    gap: var(--space-md);
    justify-content: flex-end;
}

/* Confirmation Modal (Friendly Warning) */
.modal-warning .modal-header {
    background: var(--warning-light);
    border-bottom-color: #fde68a;
}

.modal-warning .modal-icon {
    font-size: 3rem;
    text-align: center;
    margin-bottom: var(--space-md);
}

/* Loading Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--teal-600);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 400;
}

/* QR Code Display */
.qr-container {
    text-align: center;
    padding: var(--space-xl);
}

.qr-code {
    background: white;
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    display: inline-block;
    box-shadow: var(--shadow-md);
}

.qr-code img {
    display: block;
}

.share-code {
    margin-top: var(--space-lg);
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    font-family: var(--font-mono);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding: var(--space-2xl) 0;
    margin-top: auto;
}

.footer-inner {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
}

@media (min-width: 768px) {
    .footer-inner {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

.footer-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: var(--space-md);
}

.footer-desc {
    max-width: 300px;
}

.footer-title {
    font-weight: 600;
    color: white;
    margin-bottom: var(--space-md);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    color: var(--gray-400);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--gray-800);
    text-align: center;
    font-size: 0.875rem;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--gray-500); }
.text-success { color: var(--success); }
.text-error { color: var(--error); }
.text-teal { color: var(--teal-600); }
.text-purple { color: var(--purple-600); }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.hidden { display: none !important; }
.visible { visibility: visible !important; }
.invisible { visibility: hidden !important; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

.w-full { width: 100%; }
.max-w-md { max-width: 28rem; }
.max-w-lg { max-width: 32rem; }
.max-w-xl { max-width: 36rem; }

/* Hero Section */
.hero {
    background: var(--gradient-primary);
    color: white;
    padding: var(--space-3xl) 0;
    text-align: center;
}

.hero h1 {
    color: white;
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

@media (min-width: 768px) {
    .hero h1 { font-size: 3.5rem; }
}

.hero p {
    font-size: 1.25rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: var(--space-3xl);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--space-lg);
    opacity: 0.5;
}

.empty-state-title {
    font-size: 1.25rem;
    color: var(--gray-700);
    margin-bottom: var(--space-sm);
}

.empty-state-desc {
    color: var(--gray-500);
    margin-bottom: var(--space-lg);
}