/* Core Learning Exchange - Design 3: AI-Modern & Sophisticated */
/* AI-Enabled CTE Education Platform */

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

:root {
    /* AI-Forward Color Palette */
    --primary-dark: #0a0e27;
    --primary-blue: #1e40af;
    --primary-purple: #7c3aed;
    --accent-cyan: #06b6d4;
    --accent-electric: #3b82f6;
    --accent-glow: #8b5cf6;
    --success-green: #10b981;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --bg-white: #ffffff;
    --bg-gray: #f8fafc;
    --bg-dark: #0f172a;
    --border-light: #e2e8f0;

    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-white);
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-blue);
    color: #fff;
    padding: 8px 16px;
    text-decoration: none;
    z-index: 100;
    border-radius: 0 0 4px 0;
}

.skip-link:focus {
    top: 0;
}

/* Typography - Modern & Sophisticated */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-purple) 50%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
}

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header - Glassmorphism */
header {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--glass-shadow);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.logo img {
    height: 50px;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.logo:hover img {
    transform: scale(1.05);
}

/* Navigation - Modern */
nav ul {
    display: flex;
    list-style: none;
    gap: 0.25rem;
    flex-wrap: wrap;
}

nav a {
    color: var(--text-primary);
    text-decoration: none;
    padding: 0.6rem 0.85rem;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

nav a::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--accent-electric), var(--accent-glow));
    border-radius: 8px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

nav a:hover::before,
nav a.active::before {
    opacity: 0.1;
}

nav a:hover,
nav a.active {
    color: var(--primary-blue);
}

/* Hero - Dark with Gradient Mesh */
.hero {
    background: linear-gradient(135deg, var(--primary-dark) 0%, #1e293b 100%);
    color: #fff;
    padding: var(--spacing-xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.15) 0%, transparent 70%);
    animation: rotate 30s linear infinite reverse;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero h1 {
    color: #fff;
    -webkit-text-fill-color: #fff;
    background: linear-gradient(135deg, #fff 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
    text-shadow: 0 0 40px rgba(59, 130, 246, 0.3);
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    color: #e2e8f0;
    font-weight: 400;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.tagline {
    font-size: 1.125rem;
    color: #cbd5e1;
}

/* Sections */
section {
    padding: var(--spacing-xl) 0;
}

section:nth-child(even) {
    background: var(--bg-gray);
}

/* Buttons - Modern Gradient */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-purple) 100%);
    color: #fff;
    box-shadow: 0 4px 14px 0 rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px 0 rgba(59, 130, 246, 0.5);
}

.btn-secondary {
    background: var(--bg-white);
    color: var(--primary-blue);
    border: 2px solid var(--border-light);
}

.btn-secondary:hover {
    border-color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px 0 rgba(59, 130, 246, 0.15);
}

.btn-secondary-light {
    background: rgba(255, 255, 255, 0.95);
    color: #1e40af;
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 14px 0 rgba(0, 0, 0, 0.2);
}

.btn-secondary-light:hover {
    background: rgba(255, 255, 255, 1);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px 0 rgba(0, 0, 0, 0.3);
}

.btn-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
}

/* Feature Grid - Cards with Glow */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.feature-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-light);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.feature-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    background: linear-gradient(135deg, var(--accent-electric), var(--accent-glow), var(--accent-cyan));
    border-radius: 16px;
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: -1;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    background: linear-gradient(135deg, var(--accent-electric), var(--accent-glow), var(--accent-cyan)) !important;
    color: white;
}

.feature-card:hover::before {
    opacity: 0;
}

.feature-card:hover h3 {
    color: white;
}

.feature-card:hover p,
.feature-card:hover li {
    color: rgba(255, 255, 255, 0.95);
}

.feature-card:hover i {
    color: white !important;
}

.feature-card h3 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.feature-card p,
.feature-card li {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* FAQ Items */
.faq-item {
    margin-bottom: 2.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-light);
}

.faq-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.faq-item h3 {
    margin-bottom: 1rem;
    color: var(--primary-blue);
}

.faq-item p {
    line-height: 1.8;
    color: var(--text-secondary);
}

/* Highlight Box - AI Glow */
.highlight-box {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(124, 58, 237, 0.05) 100%);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-left: 4px solid var(--accent-electric);
    padding: 3rem;
    margin: 3rem 0;
    border-radius: 16px;
    position: relative;
    overflow: hidden;
}

.highlight-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(124, 58, 237, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.new-feature {
    border-left-color: var(--primary-purple);
    position: relative;
}

.new-feature::after {
    content: 'NEW';
    position: absolute;
    top: 2rem;
    right: 2rem;
    background: linear-gradient(135deg, var(--primary-purple), #a855f7);
    color: white;
    padding: 0.5rem 1.25rem;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.75rem;
    letter-spacing: 1px;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.4);
}

/* Two Column */
.two-column {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 4rem;
    align-items: start;
}

/* Team Grid - Modern Cards */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.team-member {
    text-align: center;
    background: var(--bg-white);
    padding: 2.5rem 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-light);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.team-member:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
    border-color: var(--accent-electric);
}

.team-member img {
    border: 3px solid var(--border-light);
    transition: all 0.3s ease;
}

.team-member:hover img {
    border-color: var(--accent-electric);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.team-member h3 {
    color: var(--text-primary);
    margin-top: 1.5rem;
    font-size: 1.25rem;
}

.team-member .role {
    color: var(--accent-electric);
    font-weight: 600;
    margin: 0.5rem 0 1.5rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.contact-links a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.contact-links a:hover {
    color: var(--accent-electric);
    border-color: var(--accent-electric);
    background: rgba(59, 130, 246, 0.05);
}

/* Footer - Dark Modern */
footer {
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1e293b 100%);
    color: #cbd5e1;
    padding: 4rem 0 2rem;
    margin-top: 6rem;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-electric), transparent);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3 {
    color: #fff;
    margin-bottom: 1.5rem;
    font-size: 1rem;
    font-weight: 600;
}

.footer-section a {
    color: #94a3b8;
    text-decoration: none;
    display: block;
    margin-bottom: 0.75rem;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

.footer-section a:hover {
    color: var(--accent-cyan);
    padding-left: 8px;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.social-links a:hover {
    border-color: var(--accent-cyan);
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent-cyan);
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: #64748b;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mb-2 {
    margin-bottom: 2rem;
}

.mb-3 {
    margin-bottom: 3rem;
}

.mt-2 {
    margin-top: 2rem;
}

/* Lists */
ul {
    list-style-position: inside;
    line-height: 2;
}

li {
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

/* Links */
a {
    color: var(--accent-electric);
    transition: color 0.3s ease;
}

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

/* AI-Specific Elements */
.ai-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(124, 58, 237, 0.1));
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-electric);
}

.ai-badge::before {
    content: '🤖';
}

/* Neural Network Pattern Background */
.neural-bg {
    position: relative;
    overflow: hidden;
}

.neural-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(124, 58, 237, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(6, 182, 212, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

/* Responsive Design */
@media (max-width: 968px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .header-content {
        flex-direction: column;
        gap: 1.5rem;
    }

    nav ul {
        justify-content: center;
    }

    .two-column {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero {
        padding: 4rem 0;
    }

    section {
        padding: 3rem 0;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 1rem;
    }

    h1 {
        font-size: 2rem !important;
    }

    h2 {
        font-size: 1.75rem !important;
    }

    .feature-card,
    .team-member {
        padding: 2rem 1.5rem;
    }

    .btn-group {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* HubSpot Chat Widget Positioning - Bottom Right */
#hubspot-messages-iframe-container,
#hubspot-conversations-iframe-container,
div[id*="hubspot-messages"],
div[id*="hubspot-conversations"] {
    position: fixed !important;
    bottom: 20px !important;
    right: 20px !important;
    left: auto !important;
    top: auto !important;
    z-index: 10000 !important;
}

#hubspot-messages-iframe-container iframe,
#hubspot-conversations-iframe-container iframe {
    position: fixed !important;
    bottom: 20px !important;
    right: 20px !important;
    left: auto !important;
    top: auto !important;
}

[id*="hubspot"][id*="widget"],
[class*="hubspot"][class*="widget"],
[id*="hs-"][id*="chat"],
[class*="hs-"][class*="chat"] {
    left: auto !important;
    right: 20px !important;
}

/* Loading Animation */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.loading {
    animation: shimmer 2s infinite;
    background: linear-gradient(to right, #f6f7f8 0%, #edeef1 20%, #f6f7f8 40%, #f6f7f8 100%);
    background-size: 1000px 100%;
}