/* ========================================
   FAQ Page - Premium Styles
   Context.ai
   ======================================== */

/* CSS Variables */
:root {
    /* Colors */
    --blue-50: #eff6ff;
    --blue-100: #dbeafe;
    --blue-400: #60a5fa;
    --blue-500: #3b82f6;
    --blue-600: #2563eb;
    --blue-700: #1d4ed8;
    --blue-800: #1e40af;
    --blue-900: #1e3a8a;
    --white: #ffffff;
    --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;
    
    /* Spacing */
    --spacing: 4px;
    
    /* Timing */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-900);
    background: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Navigation */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: calc(var(--spacing) * 4) calc(var(--spacing) * 8);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--blue-600) 0%, var(--blue-800) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
    transition: transform var(--transition-fast);
}

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

.nav-links {
    display: flex;
    gap: calc(var(--spacing) * 8);
    list-style: none;
}

.nav-links a {
    color: var(--gray-600);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--blue-600);
    transition: width var(--transition-normal);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--blue-600);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.cta-button {
    padding: calc(var(--spacing) * 2.5) calc(var(--spacing) * 5);
    background: linear-gradient(135deg, var(--blue-600) 0%, var(--blue-800) 100%);
    color: var(--white);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 12px -2px rgba(37, 99, 235, 0.2);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px -4px rgba(37, 99, 235, 0.3);
}

/* ========================================
   Hero Section with Subtle AI Brain
   ======================================== */

.hero-section {
    padding: calc(var(--spacing) * 30) calc(var(--spacing) * 8) calc(var(--spacing) * 15);
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 100%);
    text-align: center;
    position: relative;
}

.hero-container {
    max-width: 900px;
    margin: 0 auto;
}

/* Subtle AI Brain Motif */
.brain-motif {
    margin-bottom: calc(var(--spacing) * 8);
    display: flex;
    justify-content: center;
    opacity: 0;
    animation: fadeInUp 1s ease forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.subtle-brain {
    width: 200px;
    height: 120px;
}

/* Brain Rings Animation */
.brain-ring {
    animation: subtleRingPulse 4s ease-in-out infinite;
}

.ring-1 {
    animation-delay: 0s;
}

.ring-2 {
    animation-delay: 0.5s;
}

@keyframes subtleRingPulse {
    0%, 100% {
        opacity: 0.2;
        transform: scale(1);
    }
    50% {
        opacity: 0.4;
        transform: scale(1.05);
    }
}

/* Brain Nodes Animation */
.brain-nodes .node {
    animation: subtleNodeGlow 3s ease-in-out infinite;
}

.node-1 { animation-delay: 0s; }
.node-2 { animation-delay: 0.3s; }
.node-3 { animation-delay: 0.6s; }
.node-4 { animation-delay: 0.9s; }
.node-5 { animation-delay: 1.2s; }
.node-6 { animation-delay: 1.5s; }
.node-7 { animation-delay: 1.8s; }
.node-8 { animation-delay: 2.1s; }

@keyframes subtleNodeGlow {
    0%, 100% {
        opacity: 0.4;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.2);
    }
}

/* Hero Text Content */
.hero-content {
    opacity: 0;
    animation: fadeInUp 1s ease 0.3s forwards;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: calc(var(--spacing) * 4);
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--blue-800) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 20px;
    line-height: 1.6;
    color: var(--gray-600);
    font-weight: 400;
}

/* ========================================
   FAQ Section
   ======================================== */

.faq-section {
    padding: calc(var(--spacing) * 15) calc(var(--spacing) * 8) calc(var(--spacing) * 20);
    background: var(--white);
}

.faq-container {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    gap: calc(var(--spacing) * 4);
}

/* FAQ Card */
.faq-card {
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: 12px;
    padding: calc(var(--spacing) * 6);
    transition: all var(--transition-normal);
    opacity: 0;
    transform: translateY(20px);
}

.faq-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.faq-card:nth-child(1) { transition-delay: 0.05s; }
.faq-card:nth-child(2) { transition-delay: 0.1s; }
.faq-card:nth-child(3) { transition-delay: 0.15s; }
.faq-card:nth-child(4) { transition-delay: 0.2s; }
.faq-card:nth-child(5) { transition-delay: 0.25s; }
.faq-card:nth-child(6) { transition-delay: 0.3s; }
.faq-card:nth-child(7) { transition-delay: 0.35s; }
.faq-card:nth-child(8) { transition-delay: 0.4s; }

.faq-card:hover {
    border-color: var(--blue-400);
    box-shadow: 0 8px 24px -4px rgba(59, 130, 246, 0.15);
}

.faq-card.active {
    border-color: var(--blue-500);
    background: var(--white);
    box-shadow: 0 12px 32px -8px rgba(59, 130, 246, 0.25);
}

/* FAQ Header */
.faq-header {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing) * 4);
    cursor: pointer;
}

.faq-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--blue-50);
    border-radius: 10px;
    transition: all var(--transition-normal);
}

.faq-card:hover .faq-icon {
    background: var(--blue-100);
    transform: scale(1.05);
}

.faq-card.active .faq-icon {
    background: var(--blue-500);
    transform: scale(1.1);
}

.faq-card.active .faq-icon svg path,
.faq-card.active .faq-icon svg circle,
.faq-card.active .faq-icon svg rect,
.faq-card.active .faq-icon svg line {
    stroke: var(--white);
}

.faq-question {
    flex: 1;
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.01em;
    line-height: 1.4;
}

.faq-card.active .faq-question {
    color: var(--blue-600);
}

/* FAQ Toggle Button */
.faq-toggle {
    width: 40px;
    height: 40px;
    min-width: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.faq-toggle:hover {
    background: var(--blue-50);
    border-color: var(--blue-400);
}

.faq-card.active .faq-toggle {
    background: var(--blue-500);
    border-color: var(--blue-500);
    transform: rotate(180deg);
}

.faq-card.active .faq-toggle .toggle-icon path {
    stroke: var(--white);
}

.toggle-icon {
    transition: transform var(--transition-normal);
}

/* FAQ Answer */
.faq-answer {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.5s ease, opacity 0.3s ease, margin-top 0.3s ease, padding-top 0.3s ease;
}

.faq-card.active .faq-answer {
    max-height: 2000px;
    opacity: 1;
    margin-top: calc(var(--spacing) * 4);
    padding-top: calc(var(--spacing) * 4);
    padding-left: calc(var(--spacing) * 16);
    border-top: 1px solid var(--gray-200);
}

.faq-answer p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--gray-700);
}

.faq-card.active .faq-answer p {
    color: var(--gray-900);
    font-weight: 400;
}

/* ========================================
   CTA Section
   ======================================== */

.cta-section {
    padding: calc(var(--spacing) * 20) calc(var(--spacing) * 8);
    background: linear-gradient(135deg, var(--blue-50) 0%, var(--white) 50%, var(--blue-50) 100%);
    text-align: center;
}

.cta-container {
    max-width: 700px;
    margin: 0 auto;
}

.cta-content {
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow);
}

.cta-content.visible {
    opacity: 1;
    transform: translateY(0);
}

.cta-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: calc(var(--spacing) * 4);
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--blue-700) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
}

.cta-description {
    font-size: 18px;
    line-height: 1.6;
    color: var(--gray-600);
    margin-bottom: calc(var(--spacing) * 8);
}

.cta-button-large {
    display: inline-flex;
    align-items: center;
    gap: calc(var(--spacing) * 3);
    padding: calc(var(--spacing) * 4) calc(var(--spacing) * 8);
    background: linear-gradient(135deg, var(--blue-600) 0%, var(--blue-800) 100%);
    color: var(--white);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 700;
    font-size: 18px;
    transition: all var(--transition-normal);
    box-shadow: 0 10px 30px -5px rgba(37, 99, 235, 0.3);
}

.cta-button-large:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -8px rgba(37, 99, 235, 0.4);
}

.cta-button-large svg {
    transition: transform var(--transition-fast);
}

.cta-button-large:hover svg {
    transform: translateX(4px);
}

.cta-note {
    margin-top: calc(var(--spacing) * 4);
    font-size: 14px;
    color: var(--gray-500);
}

/* ========================================
   Footer
   ======================================== */

.main-footer {
    background: var(--gray-900);
    color: var(--white);
    padding: calc(var(--spacing) * 15) calc(var(--spacing) * 8) calc(var(--spacing) * 8);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: calc(var(--spacing) * 15);
    margin-bottom: calc(var(--spacing) * 10);
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--blue-400) 0%, var(--blue-600) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: calc(var(--spacing) * 3);
}

.footer-tagline {
    color: var(--gray-400);
    line-height: 1.6;
    font-size: 14px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: calc(var(--spacing) * 10);
}

.footer-column h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: calc(var(--spacing) * 4);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: calc(var(--spacing) * 2);
}

.footer-column a {
    color: var(--gray-400);
    text-decoration: none;
    font-size: 14px;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--blue-400);
}

.footer-bottom {
    padding-top: calc(var(--spacing) * 8);
    border-top: 1px solid var(--gray-800);
    text-align: center;
}

.footer-bottom p {
    color: var(--gray-500);
    font-size: 14px;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1200px) {
    .hero-title {
        font-size: 48px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .faq-question {
        font-size: 17px;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: calc(var(--spacing) * 4);
    }

    .nav-links {
        display: none;
    }

    .hero-section {
        padding: calc(var(--spacing) * 20) calc(var(--spacing) * 4) calc(var(--spacing) * 10);
    }

    .subtle-brain {
        width: 160px;
        height: 96px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .faq-section {
        padding: calc(var(--spacing) * 10) calc(var(--spacing) * 4) calc(var(--spacing) * 15);
    }

    .faq-card {
        padding: calc(var(--spacing) * 5);
    }

    .faq-icon {
        width: 40px;
        height: 40px;
        min-width: 40px;
    }

    .faq-icon svg {
        width: 20px;
        height: 20px;
    }

    .faq-question {
        font-size: 16px;
    }

    .faq-toggle {
        width: 36px;
        height: 36px;
        min-width: 36px;
    }

    .faq-card.active .faq-answer {
        padding-left: calc(var(--spacing) * 11);
    }

    .faq-answer p {
        font-size: 15px;
    }

    .cta-section {
        padding: calc(var(--spacing) * 15) calc(var(--spacing) * 4);
    }

    .cta-title {
        font-size: 32px;
    }

    .cta-description {
        font-size: 16px;
    }

    .cta-button-large {
        padding: calc(var(--spacing) * 3.5) calc(var(--spacing) * 6);
        font-size: 16px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: calc(var(--spacing) * 8);
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: calc(var(--spacing) * 6);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 15px;
    }

    .faq-card {
        padding: calc(var(--spacing) * 4);
    }

    .faq-header {
        gap: calc(var(--spacing) * 3);
    }

    .faq-icon {
        width: 36px;
        height: 36px;
        min-width: 36px;
    }

    .faq-question {
        font-size: 15px;
    }

    .faq-toggle {
        width: 32px;
        height: 32px;
        min-width: 32px;
    }

    .faq-card.active .faq-answer {
        padding-left: calc(var(--spacing) * 9);
    }

    .cta-title {
        font-size: 26px;
    }
}

/* ========================================
   Accessibility
   ======================================== */

/* Focus styles for keyboard navigation */
.faq-card:focus-within {
    outline: 2px solid var(--blue-500);
    outline-offset: 2px;
}

.faq-toggle:focus {
    outline: 2px solid var(--blue-500);
    outline-offset: 2px;
}

/* Reduced motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}