/* ============================================
   PACO AI — Global Brand System
   Dark-mode identity. Aila-inspired patterns.
   All pages @import or <link> this file.
   ============================================ */

:root {
  --bg-primary: #09090b;
  --bg-secondary: #0f0f12;
  --bg-tertiary: #16161a;
  --bg-card: #1c1c22;
  --bg-card-hover: #222228;
  --text-primary: #ededef;
  --text-secondary: #8b8b96;
  --text-muted: #5a5a66;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-glow: rgba(59, 130, 246, 0.15);
  --accent-soft: rgba(59, 130, 246, 0.08);
  --success: #22c55e;
  --error: #ef4444;
  --warning: #f59e0b;
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --border-accent: rgba(59, 130, 246, 0.3);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro', 'Segoe UI', sans-serif;
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --section-padding: clamp(60px, 8vw, 120px);
  --container-max: 1200px;
  --container-wide: 1400px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.1);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 200ms;
  --duration-normal: 400ms;
  --duration-slow: 800ms;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body { font-family: var(--font-family); background: var(--bg-primary); color: var(--text-primary); line-height: 1.6; overflow-x: hidden; }
a { color: var(--accent); text-decoration: none; transition: color var(--duration-fast) ease; }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; display: block; }
button { font-family: var(--font-family); cursor: pointer; border: none; outline: none; }
::selection { background: rgba(59, 130, 246, 0.3); }

/* Container */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
.container-wide { max-width: var(--container-wide); margin: 0 auto; padding: 0 24px; }

/* Navigation */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 16px 0; transition: all var(--duration-normal) var(--ease-out); background: transparent; }
.nav.scrolled { background: rgba(9, 9, 11, 0.85); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); padding: 12px 0; }
.nav-inner { max-width: var(--container-wide); margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; gap: 2px; font-family: var(--font-display); font-size: 1.6rem; font-weight: 400; color: var(--text-primary); text-decoration: none; letter-spacing: -0.02em; }
.nav-logo span { font-weight: 300; color: var(--text-secondary); font-size: 1.1rem; font-family: var(--font-display); }
.nav-links { display: flex; align-items: center; gap: 32px; list-style: none; }
.nav-links a { color: var(--text-secondary); font-size: 0.9rem; font-weight: 500; transition: color var(--duration-fast) ease; text-decoration: none; }
.nav-links a:hover { color: var(--text-primary); }
.nav-links a.active { color: var(--text-primary); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; background: none; border: none; color: var(--text-primary); font-size: 1.5rem; cursor: pointer; }
.mobile-menu { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: var(--bg-primary); z-index: 999; padding: 80px 24px 24px; flex-direction: column; gap: 24px; }
.mobile-menu.active { display: flex; }
.mobile-menu a { color: var(--text-primary); font-size: 1.25rem; font-weight: 500; text-decoration: none; padding: 12px 0; border-bottom: 1px solid var(--border); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 28px; border-radius: var(--radius-full); font-size: 0.9rem; font-weight: 600; transition: all var(--duration-fast) var(--ease-out); white-space: nowrap; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 2px 12px rgba(59, 130, 246, 0.3); }
.btn-primary:hover { background: var(--accent-hover); color: #fff; transform: translateY(-2px); box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4); }
.btn-secondary { background: rgba(255, 255, 255, 0.06); color: var(--text-primary); border: 1px solid var(--border-hover); }
.btn-secondary:hover { background: rgba(255, 255, 255, 0.1); color: #fff; border-color: rgba(255, 255, 255, 0.2); }
.btn-ghost { background: transparent; color: var(--text-secondary); padding: 12px 16px; }
.btn-ghost:hover { color: var(--text-primary); }
.btn-lg { padding: 16px 36px; font-size: 1rem; }

/* Sections */
section { padding: var(--section-padding) 0; position: relative; }
.section-label { font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 16px; display: block; }
.section-title { font-family: var(--font-display); font-size: clamp(2rem, 4vw, 3.25rem); font-weight: 400; line-height: 1.15; margin-bottom: 16px; letter-spacing: -0.01em; }
.section-subtitle { font-size: clamp(1rem, 1.5vw, 1.15rem); color: var(--text-secondary); max-width: 600px; line-height: 1.7; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-header .section-subtitle { margin: 0 auto; }

/* Hero */
.hero { min-height: 100vh; display: flex; align-items: center; justify-content: center; text-align: center; padding-top: 100px; position: relative; overflow: hidden; }
.hero-bg { position: absolute; top: 0; left: 0; right: 0; bottom: 0; z-index: 0; }
.hero-bg::before { content: ''; position: absolute; top: -40%; left: 50%; transform: translateX(-50%); width: 800px; height: 800px; background: radial-gradient(circle, rgba(59, 130, 246, 0.12) 0%, transparent 70%); animation: auraPulse 8s ease-in-out infinite; }
.hero-bg::after { content: ''; position: absolute; bottom: -20%; left: 50%; transform: translateX(-50%); width: 1000px; height: 600px; background: radial-gradient(ellipse, rgba(99, 102, 241, 0.06) 0%, transparent 70%); animation: auraPulse 12s ease-in-out infinite reverse; }
@keyframes auraPulse { 0%, 100% { opacity: 0.6; transform: translateX(-50%) scale(1); } 50% { opacity: 1; transform: translateX(-50%) scale(1.1); } }
.dot-grid { position: absolute; top: 0; left: 0; right: 0; bottom: 0; background-image: radial-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px); background-size: 30px 30px; mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%); -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%); }
.hero-content { position: relative; z-index: 1; max-width: 850px; margin: 0 auto; padding: 0 24px; }
.hero-title { font-family: var(--font-display); font-size: clamp(2.8rem, 6vw, 4.8rem); font-weight: 400; line-height: 1.1; letter-spacing: -0.01em; margin-bottom: 24px; }
.hero-title .gradient-text { background: linear-gradient(135deg, var(--accent), #818cf8, #c084fc); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-subtitle { font-size: clamp(1.05rem, 1.8vw, 1.25rem); color: var(--text-secondary); max-width: 580px; margin: 0 auto 40px; line-height: 1.7; }
.hero-ctas { display: flex; align-items: center; justify-content: center; gap: 16px; margin-bottom: 60px; }

/* Cards */
.card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 32px; transition: all var(--duration-normal) var(--ease-out); }
.card:hover { border-color: var(--border-hover); background: var(--bg-card-hover); transform: translateY(-4px); box-shadow: var(--shadow-card); }
.card-spotlight { position: relative; overflow: hidden; }
.card-spotlight::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), var(--accent-glow), transparent 40%); opacity: 0; transition: opacity var(--duration-normal) ease; pointer-events: none; }
.card-spotlight:hover::before { opacity: 1; }
.card-icon { width: 48px; height: 48px; border-radius: var(--radius-md); background: var(--accent-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; font-size: 1.25rem; margin-bottom: 20px; }
.card-title { font-size: 1.15rem; font-weight: 600; margin-bottom: 8px; }
.card-desc { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; }

/* Grids */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; align-items: center; }

/* Logo Carousel */
.logo-carousel { overflow: hidden; padding: 40px 0; mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent); -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent); }
.logo-track { display: flex; gap: 60px; animation: scroll 30s linear infinite; width: max-content; }
.logo-track .logo-item { height: 36px; opacity: 0.4; transition: all var(--duration-fast) ease; display: flex; align-items: center; gap: 8px; font-size: 0.9rem; color: var(--text-muted); font-weight: 600; white-space: nowrap; }
.logo-track .logo-item:hover { opacity: 0.8; }
@keyframes scroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* Flow Demo */
.flow-demo { display: flex; align-items: center; justify-content: center; gap: 40px; padding: 40px; flex-wrap: wrap; }
.flow-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; min-width: 280px; max-width: 340px; }
.flow-card-header { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; font-weight: 600; font-size: 0.95rem; }
.flow-card-header .icon { width: 32px; height: 32px; border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 0.9rem; }
.flow-field { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 0.85rem; }
.flow-field:last-child { border-bottom: none; }
.flow-field .label { color: var(--text-secondary); }
.flow-field .value { color: var(--text-primary); font-weight: 500; }
.flow-arrow { font-size: 2rem; color: var(--accent); animation: arrowPulse 2s ease-in-out infinite; }
@keyframes arrowPulse { 0%, 100% { opacity: 0.4; transform: translateX(0); } 50% { opacity: 1; transform: translateX(8px); } }
.flow-sync { display: flex; align-items: center; gap: 8px; margin-top: 12px; padding: 8px 12px; background: rgba(34, 197, 94, 0.08); border-radius: var(--radius-sm); color: var(--success); font-size: 0.8rem; font-weight: 500; }

/* Steps */
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step-card { text-align: center; padding: 32px 20px; }
.step-number { font-size: 3.5rem; font-weight: 800; color: rgba(59, 130, 246, 0.12); margin-bottom: 16px; line-height: 1; }
.step-title { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
.step-desc { color: var(--text-secondary); font-size: 0.85rem; line-height: 1.5; }
.step-metric { display: inline-flex; align-items: center; gap: 4px; margin-top: 12px; padding: 4px 12px; border-radius: var(--radius-full); background: rgba(34, 197, 94, 0.08); color: var(--success); font-size: 0.8rem; font-weight: 600; }

/* Testimonials */
.testimonial-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.testimonial-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-xl); padding: 40px; }
.testimonial-text { font-size: 1.1rem; line-height: 1.7; margin-bottom: 24px; font-style: italic; color: var(--text-primary); }
.testimonial-author { display: flex; align-items: center; gap: 14px; }
.testimonial-avatar { width: 48px; height: 48px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 1.1rem; }
.testimonial-name { font-weight: 600; font-size: 0.95rem; }
.testimonial-role { color: var(--text-secondary); font-size: 0.8rem; }

/* Pricing */
.pricing-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-xl); padding: 40px; position: relative; transition: all var(--duration-normal) var(--ease-out); }
.pricing-card:hover { border-color: var(--border-hover); transform: translateY(-4px); }
.pricing-card.featured { border-color: var(--accent); box-shadow: var(--shadow-glow); }
.pricing-name { font-size: 1.1rem; font-weight: 600; margin-bottom: 4px; }
.pricing-price { font-size: 2.8rem; font-weight: 800; margin: 12px 0; letter-spacing: -0.02em; }
.pricing-price .period { font-size: 1rem; font-weight: 400; color: var(--text-secondary); }
.pricing-desc { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 24px; }
.pricing-features { list-style: none; margin-bottom: 32px; }
.pricing-features li { display: flex; align-items: center; gap: 10px; padding: 8px 0; font-size: 0.9rem; color: var(--text-secondary); }
.pricing-features li::before { content: '\2713'; color: var(--accent); font-weight: 700; }

/* CTA Banner */
.cta-banner { text-align: center; padding: 80px 24px; background: var(--bg-secondary); border-radius: var(--radius-xl); border: 1px solid var(--border); position: relative; overflow: hidden; }
.cta-banner::before { content: ''; position: absolute; top: -50%; left: 50%; transform: translateX(-50%); width: 600px; height: 400px; background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%); pointer-events: none; }
.cta-banner .section-title { margin-bottom: 16px; }

/* Footer */
.footer { padding: 60px 0 30px; border-top: 1px solid var(--border); background: var(--bg-primary); }
.footer-grid { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 40px; margin-bottom: 40px; }
.footer-brand .nav-logo { margin-bottom: 12px; }
.footer-brand p { color: var(--text-secondary); font-size: 0.85rem; line-height: 1.6; max-width: 280px; }
.footer-col h4 { font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); margin-bottom: 16px; }
.footer-col a { display: block; color: var(--text-secondary); font-size: 0.9rem; padding: 6px 0; transition: color var(--duration-fast) ease; text-decoration: none; }
.footer-col a:hover { color: var(--text-primary); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; padding-top: 24px; border-top: 1px solid var(--border); color: var(--text-muted); font-size: 0.8rem; }

/* Badges */
.badge { display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px; border-radius: var(--radius-full); font-size: 0.75rem; font-weight: 600; }
.badge-success { background: rgba(34, 197, 94, 0.1); color: var(--success); }
.badge-warning { background: rgba(245, 158, 11, 0.1); color: var(--warning); }
.badge-error { background: rgba(239, 68, 68, 0.1); color: var(--error); }
.badge-info { background: var(--accent-soft); color: var(--accent); }

/* Forms */
.email-form { display: flex; gap: 12px; max-width: 460px; margin: 0 auto; }
.email-form input { flex: 1; padding: 14px 20px; border-radius: var(--radius-full); border: 1px solid var(--border); background: var(--bg-card); color: var(--text-primary); font-family: var(--font-family); font-size: 0.9rem; outline: none; transition: border-color var(--duration-fast) ease; }
.email-form input::placeholder { color: var(--text-muted); }
.email-form input:focus { border-color: var(--accent); }

/* Content pages (privacy, terms, etc) */
.content-wrap { max-width: 680px; margin: 0 auto; padding: 120px 24px 80px; }
.content-wrap h1 { font-size: clamp(28px, 5vw, 40px); font-weight: 700; letter-spacing: -0.03em; margin-bottom: 8px; }
.content-wrap .date { font-size: 12px; color: var(--text-muted); margin-bottom: 48px; }
.content-wrap h2 { font-size: 18px; font-weight: 600; margin: 40px 0 12px; letter-spacing: -0.01em; }
.content-wrap p, .content-wrap li { font-size: 15px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 12px; }
.content-wrap ul { padding-left: 20px; }
.content-wrap a { color: var(--accent); }
.content-wrap .highlight { background: var(--accent-soft); border-left: 3px solid var(--accent); padding: 16px 20px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin: 24px 0; }
.content-wrap .highlight p { color: var(--text-primary); margin: 0; }

/* Scroll Animations */
.reveal { opacity: 0; transform: translateY(30px); transition: all var(--duration-slow) var(--ease-out); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }
.stagger-children > * { opacity: 0; transform: translateY(20px); transition: all 600ms var(--ease-out); }
.stagger-children.visible > *:nth-child(1) { transition-delay: 0ms; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(2) { transition-delay: 80ms; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(3) { transition-delay: 80ms; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(4) { transition-delay: 160ms; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(5) { transition-delay: 240ms; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(6) { transition-delay: 320ms; opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .hero-title { font-size: clamp(2.2rem, 8vw, 3.2rem); }
  .hero-ctas { flex-direction: column; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid-2 { grid-template-columns: 1fr; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr 1fr; }
  .flow-demo { flex-direction: column; }
  .flow-arrow { transform: rotate(90deg); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .email-form { flex-direction: column; }
  .btn-lg { width: 100%; }
}
@media (max-width: 480px) {
  .steps-grid { grid-template-columns: 1fr; }
  section { padding: 48px 0; }
}