/* =====================
   CSS CUSTOM PROPERTIES
   ===================== */
:root {
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-primary-glow: rgba(99, 102, 241, 0.4);
    --color-secondary: #0ea5e9;
    --color-accent: #f472b6;
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;
    --color-gray-950: #020617;
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.02) 100%);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px var(--color-primary-glow);
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    --container-max: 1200px;
    --container-padding: 1.5rem;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-family); font-size: 1rem; line-height: 1.6; color: var(--color-gray-100); background: var(--color-gray-950); overflow-x: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

.container { width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 var(--container-padding); }
.gradient-text { background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 1rem 2rem; font-size: 1rem; font-weight: 600; border-radius: var(--radius-lg); transition: all var(--transition-base); position: relative; overflow: hidden; }
.btn-primary { background: var(--gradient-primary); color: var(--color-white); box-shadow: var(--shadow-lg), 0 0 20px var(--color-primary-glow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-xl), 0 0 30px var(--color-primary-glow); }
.btn-lg { padding: 1.5rem 3rem; font-size: 1.125rem; }
.btn-xl { padding: 1.5rem 3rem; font-size: 1.25rem; border-radius: var(--radius-xl); }

/* Section Headers */
.section-header { text-align: center; margin-bottom: 4rem; }
.section-badge { display: inline-block; padding: 0.25rem 1rem; background: rgba(99, 102, 241, 0.1); border: 1px solid rgba(99, 102, 241, 0.2); border-radius: var(--radius-full); font-size: 0.875rem; font-weight: 500; color: var(--color-primary-light); margin-bottom: 1rem; }
.section-title { font-size: 1.875rem; font-weight: 800; color: var(--color-white); margin-bottom: 1rem; line-height: 1.2; }
.section-subtitle { font-size: 1.125rem; color: var(--color-gray-400); max-width: 600px; margin: 0 auto; }

/* Hero Section */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding: 6rem 0; overflow: hidden; }
.hero-bg-gradient { position: absolute; inset: 0; background: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.3), transparent), radial-gradient(ellipse 60% 40% at 80% 60%, rgba(14, 165, 233, 0.15), transparent); pointer-events: none; }
.hero .container { display: grid; grid-template-columns: 1fr; gap: 3rem; align-items: center; position: relative; z-index: 1; }
.hero-content { text-align: center; }
.hero-badge { display: inline-block; padding: 0.5rem 1.5rem; background: rgba(99, 102, 241, 0.1); border: 1px solid rgba(99, 102, 241, 0.3); border-radius: var(--radius-full); font-size: 0.875rem; font-weight: 500; color: var(--color-primary-light); margin-bottom: 1.5rem; animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.7; } }
.hero-title { font-size: 2.25rem; font-weight: 800; line-height: 1.1; color: var(--color-white); margin-bottom: 1.5rem; }
.hero-subtitle { font-size: 1.125rem; color: var(--color-gray-300); margin-bottom: 2rem; max-width: 540px; margin-left: auto; margin-right: auto; }
.hero-cta { margin-bottom: 3rem; }
.hero-cta-note { margin-top: 1rem; font-size: 0.875rem; color: var(--color-gray-400); }
.hero-stats { display: flex; justify-content: center; gap: 2rem; flex-wrap: wrap; }
.stat { text-align: center; }
.stat-number { display: block; font-size: 1.5rem; font-weight: 700; color: var(--color-white); }
.stat-label { font-size: 0.875rem; color: var(--color-gray-400); }
.hero-visual { display: none; }

/* Benefits Section */
.benefits { padding: 6rem 0; background: var(--color-gray-900); }
.benefits-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
.benefit-card { padding: 2rem; background: var(--gradient-card); border: 1px solid rgba(255, 255, 255, 0.05); border-radius: var(--radius-xl); transition: all var(--transition-base); }
.benefit-card:hover { transform: translateY(-4px); border-color: rgba(99, 102, 241, 0.3); box-shadow: 0 0 30px rgba(99, 102, 241, 0.1); }
.benefit-icon { font-size: 1.875rem; margin-bottom: 1rem; }
.benefit-card h3 { font-size: 1.25rem; font-weight: 700; color: var(--color-white); margin-bottom: 0.5rem; }
.benefit-card p { color: var(--color-gray-400); }

/* Audience Section */
.audience { padding: 6rem 0; background: var(--color-gray-950); }
.audience-wrapper { display: grid; grid-template-columns: 1fr; gap: 3rem; align-items: center; }
.audience-content .section-badge, .audience-content .section-title { text-align: left; }
.audience-list { margin-top: 2rem; }
.audience-list li { display: flex; gap: 1rem; margin-bottom: 1.5rem; align-items: flex-start; }
.check-icon { display: flex; align-items: center; justify-content: center; width: 28px; height: 28px; background: rgba(34, 197, 94, 0.1); border: 1px solid rgba(34, 197, 94, 0.3); border-radius: var(--radius-full); color: #22c55e; font-size: 0.875rem; font-weight: 700; flex-shrink: 0; }
.audience-list strong { display: block; font-size: 1.125rem; color: var(--color-white); margin-bottom: 0.25rem; }
.audience-list p { color: var(--color-gray-400); }
.audience-visual { display: flex; flex-direction: column; align-items: center; gap: 2rem; }
.avatar-stack { display: flex; justify-content: center; }
.avatar { width: 56px; height: 56px; border-radius: 50%; background: var(--gradient-primary); display: flex; align-items: center; justify-content: center; font-size: 1.5rem; border: 3px solid var(--color-gray-950); margin-left: -12px; }
.avatar:first-child { margin-left: 0; }
.audience-stat-card { text-align: center; padding: 2rem; background: var(--gradient-card); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: var(--radius-xl); width: 100%; max-width: 300px; }
.stat-big { font-size: 2.25rem; font-weight: 800; background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-desc { color: var(--color-gray-300); margin-bottom: 1rem; }
.rating { display: flex; flex-direction: column; gap: 0.25rem; }
.rating-text { font-size: 0.875rem; color: var(--color-gray-400); }

/* Curriculum Section */
.curriculum { padding: 6rem 0; background: var(--color-gray-900); }
.modules-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
.module-card { display: flex; gap: 1.5rem; padding: 2rem; background: var(--gradient-card); border: 1px solid rgba(255, 255, 255, 0.05); border-radius: var(--radius-xl); transition: all var(--transition-base); }
.module-card:hover { border-color: rgba(99, 102, 241, 0.3); }
.module-number { font-size: 1.875rem; font-weight: 800; background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1; }
.module-content h3 { font-size: 1.25rem; font-weight: 700; color: var(--color-white); margin-bottom: 1rem; }
.module-content ul li { position: relative; padding-left: 1.5rem; color: var(--color-gray-400); margin-bottom: 0.5rem; }
.module-content ul li::before { content: "→"; position: absolute; left: 0; color: var(--color-primary); }
.curriculum-cta { text-align: center; margin-top: 3rem; }

/* Testimonials Section */
.testimonials { padding: 6rem 0; background: var(--color-gray-950); }
.testimonials-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
.testimonial-card { padding: 2rem; background: var(--gradient-card); border: 1px solid rgba(255, 255, 255, 0.05); border-radius: var(--radius-xl); transition: all var(--transition-base); }
.testimonial-card:hover { transform: translateY(-4px); border-color: rgba(99, 102, 241, 0.3); }
.testimonial-card.featured { border-color: rgba(99, 102, 241, 0.4); background: linear-gradient(145deg, rgba(99, 102, 241, 0.1) 0%, rgba(255, 255, 255, 0.02) 100%); }
.testimonial-rating { margin-bottom: 1rem; }
.testimonial-text { font-size: 1.125rem; color: var(--color-gray-200); margin-bottom: 1.5rem; font-style: italic; line-height: 1.7; }
.testimonial-author { display: flex; align-items: center; gap: 1rem; }
.author-avatar { width: 48px; height: 48px; border-radius: 50%; background: var(--gradient-primary); display: flex; align-items: center; justify-content: center; font-size: 1.25rem; }
.author-info { display: flex; flex-direction: column; }
.author-info strong { color: var(--color-white); }
.author-info span { color: var(--color-gray-400); font-size: 0.875rem; }

/* FAQ Section */
.faq { padding: 6rem 0; background: var(--color-gray-900); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid rgba(255, 255, 255, 0.1); }
.faq-item:last-child { border-bottom: none; }
.faq-question { width: 100%; display: flex; justify-content: space-between; align-items: center; padding: 2rem 0; text-align: left; font-size: 1.125rem; font-weight: 600; color: var(--color-white); transition: color var(--transition-base); }
.faq-question:hover { color: var(--color-primary-light); }
.faq-icon { flex-shrink: 0; transition: transform var(--transition-base); color: var(--color-gray-400); }
.faq-item.active .faq-icon { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height var(--transition-slow), padding var(--transition-slow); }
.faq-item.active .faq-answer { max-height: 300px; padding-bottom: 2rem; }
.faq-answer p { color: var(--color-gray-400); line-height: 1.7; }

/* Final CTA Section */
.final-cta { padding: 6rem 0; background: radial-gradient(ellipse 80% 50% at 50% 100%, rgba(99, 102, 241, 0.2), transparent), var(--color-gray-950); }
.cta-card { text-align: center; padding: 3rem 2rem; background: var(--gradient-card); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: var(--radius-2xl); position: relative; overflow: hidden; }
.cta-card::before { content: ""; position: absolute; top: 0; left: 50%; transform: translateX(-50%); width: 200px; height: 2px; background: var(--gradient-primary); }
.cta-title { font-size: 1.875rem; font-weight: 800; color: var(--color-white); margin-bottom: 0.5rem; }
.cta-subtitle { font-size: 1.125rem; color: var(--color-gray-400); margin-bottom: 3rem; }
.pricing-box { margin-bottom: 3rem; }
.price-original { font-size: 1.25rem; color: var(--color-gray-500); text-decoration: line-through; margin-bottom: 0.25rem; }
.price-current { display: flex; align-items: flex-start; justify-content: center; color: var(--color-white); margin-bottom: 0.25rem; }
.currency { font-size: 1.5rem; font-weight: 600; margin-top: 0.5rem; }
.amount { font-size: 3.75rem; font-weight: 800; line-height: 1; }
.price-note { font-size: 0.875rem; color: var(--color-gray-400); }
.cta-features { display: inline-flex; flex-direction: column; align-items: flex-start; gap: 0.5rem; margin-bottom: 3rem; text-align: left; }
.cta-features li { color: var(--color-gray-300); }
.guarantee { display: flex; align-items: center; justify-content: center; gap: 1rem; margin-top: 3rem; padding: 1.5rem; background: rgba(34, 197, 94, 0.1); border: 1px solid rgba(34, 197, 94, 0.2); border-radius: var(--radius-lg); }
.guarantee-badge { font-size: 1.5rem; }
.guarantee-text { text-align: left; }
.guarantee-text strong { display: block; color: #22c55e; }
.guarantee-text span { font-size: 0.875rem; color: var(--color-gray-400); }

/* Footer */
.footer { padding: 2rem 0; background: var(--color-gray-950); border-top: 1px solid rgba(255, 255, 255, 0.05); }
.footer-content { display: flex; flex-direction: column; align-items: center; gap: 1rem; text-align: center; }
.footer-content p { color: var(--color-gray-500); font-size: 0.875rem; }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { color: var(--color-gray-400); font-size: 0.875rem; transition: color var(--transition-fast); }
.footer-links a:hover { color: var(--color-primary-light); }

/* Hero Visual Elements */
.hero-image-container { position: relative; height: 400px; }
.floating-card { position: absolute; display: flex; align-items: center; gap: 0.5rem; padding: 1rem 1.5rem; background: var(--gradient-card); backdrop-filter: blur(10px); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: var(--radius-lg); font-size: 0.875rem; font-weight: 500; color: var(--color-white); animation: float 3s ease-in-out infinite; box-shadow: var(--shadow-lg); }
.card-icon { font-size: 1.25rem; }
.card-1 { top: 10%; left: 0; animation-delay: 0s; }
.card-2 { top: 40%; right: 0; animation-delay: 0.5s; }
.card-3 { bottom: 10%; left: 10%; animation-delay: 1s; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
.hero-main-visual { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 280px; height: 200px; }
.visual-glow { position: absolute; inset: -20px; background: var(--gradient-primary); filter: blur(40px); opacity: 0.3; border-radius: var(--radius-2xl); }
.visual-content { position: relative; width: 100%; height: 100%; background: var(--color-gray-800); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: var(--radius-xl); overflow: hidden; }
.ai-prompt-demo { padding: 1rem; height: 100%; display: flex; flex-direction: column; }
.prompt-header { display: flex; gap: 0.25rem; margin-bottom: 1rem; }
.prompt-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--color-gray-600); }
.prompt-dot:nth-child(1) { background: #ff5f57; }
.prompt-dot:nth-child(2) { background: #ffbd2e; }
.prompt-dot:nth-child(3) { background: #28ca42; }
.prompt-text { font-size: 0.875rem; color: var(--color-gray-300); margin-bottom: 1rem; flex: 1; }
.prompt-response { padding: 1rem; background: rgba(99, 102, 241, 0.1); border-radius: var(--radius-md); }
.typing-indicator { display: flex; gap: 0.25rem; }
.typing-indicator span { width: 8px; height: 8px; background: var(--color-primary); border-radius: 50%; animation: typing 1.4s infinite; }
.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing { 0%, 60%, 100% { transform: translateY(0); opacity: 0.4; } 30% { transform: translateY(-4px); opacity: 1; } }

/* Responsive - Tablet */
@media (min-width: 768px) {
    .section-title { font-size: 2.25rem; }
    .hero-title { font-size: 3rem; }
    .hero-visual { display: block; }
    .hero .container { grid-template-columns: 1fr 1fr; text-align: left; }
    .hero-content { text-align: left; }
    .hero-subtitle { margin-left: 0; margin-right: 0; }
    .hero-stats { justify-content: flex-start; }
    .benefits-grid { grid-template-columns: repeat(2, 1fr); }
    .audience-wrapper { grid-template-columns: 1fr 1fr; }
    .modules-grid { grid-template-columns: repeat(2, 1fr); }
    .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
    .cta-card { padding: 4rem; }
    .footer-content { flex-direction: row; justify-content: space-between; }
}

/* Responsive - Desktop */
@media (min-width: 1024px) {
    .hero-title { font-size: 3.75rem; }
    .benefits-grid { grid-template-columns: repeat(3, 1fr); }
    .modules-grid { grid-template-columns: repeat(3, 1fr); }
    .testimonials-grid { grid-template-columns: repeat(4, 1fr); }
    .testimonial-card.featured { grid-column: span 2; }
}

/* Animations */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
.hero-content, .hero-visual { animation: fadeInUp 0.8s ease-out; }
.hero-visual { animation-delay: 0.2s; animation-fill-mode: both; }
.animate-on-scroll { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.animate-on-scroll.animated { opacity: 1; transform: translateY(0); }