/* ============================================
   X4 DIGITAL — Design System
   Dark, high-gloss AI platform aesthetic
   Obsidian backgrounds, electric gradients
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=DM+Sans:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  2rem;
  --text-4xl:  2.5rem;
  --text-5xl:  3.5rem;
  --text-6xl:  4.5rem;
  --text-7xl:  6rem;
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --space-32: 8rem;
  --color-bg:          #08080E;
  --color-surface:     #0D0D18;
  --color-surface-2:   #131320;
  --color-surface-3:   #1A1A2E;
  --color-border:      #1E1E35;
  --color-border-bright: #2E2E50;
  --color-text:        #EEEEF5;
  --color-text-secondary: #8888AA;
  --color-text-muted:  #555570;
  --color-primary:       #6C63FF;
  --color-primary-hover: #5A52E8;
  --color-primary-glow:  rgba(108, 99, 255, 0.35);
  --color-accent:        #00D4FF;
  --color-accent-glow:   rgba(0, 212, 255, 0.25);
  --color-success:       #00E5A0;
  --gradient-primary: linear-gradient(135deg, #6C63FF 0%, #00D4FF 100%);
  --gradient-hero:    linear-gradient(135deg, #6C63FF 0%, #A855F7 50%, #00D4FF 100%);
  --gradient-card:    linear-gradient(135deg, #131320 0%, #1A1A2E 100%);
  --gradient-glow:    radial-gradient(ellipse at 50% 0%, rgba(108,99,255,0.2) 0%, transparent 70%);
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-full: 9999px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body { font-family: var(--font-body); background: var(--color-bg); color: var(--color-text); line-height: 1.6; overflow-x: hidden; }
h1, h2, h3, h4, h5 { font-family: var(--font-display); line-height: 1.15; letter-spacing: -0.02em; color: var(--color-text); }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

.container        { max-width: 1200px; margin: 0 auto; padding: 0 var(--space-6); }
.container-narrow { max-width: 760px;  margin: 0 auto; padding: 0 var(--space-6); }
.container-wide   { max-width: 1400px; margin: 0 auto; padding: 0 var(--space-6); }
.section          { padding: var(--space-24) 0; }
.section-sm       { padding: var(--space-16) 0; }

@media (max-width: 768px) { .section { padding: var(--space-16) 0; } .section-sm { padding: var(--space-12) 0; } }

.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; display: flex; align-items: center; justify-content: space-between; padding: var(--space-4) var(--space-6); transition: background 0.3s, border-color 0.3s, backdrop-filter 0.3s; border-bottom: 1px solid transparent; }
.nav.scrolled { background: rgba(8, 8, 14, 0.85); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-color: var(--color-border); }
.nav-logo { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 700; letter-spacing: -0.03em; display: flex; align-items: center; gap: var(--space-2); }
.nav-logo .logo-ax { background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav-links { display: flex; align-items: center; gap: var(--space-8); }
.nav-links a { font-size: var(--text-sm); font-weight: 500; color: var(--color-text-secondary); transition: color 0.2s; position: relative; }
.nav-links a:hover { color: var(--color-text); }
.nav-links a::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 1px; background: var(--gradient-primary); transition: width 0.3s ease; }
.nav-links a:hover::after { width: 100%; }
.nav-actions { display: flex; align-items: center; gap: var(--space-3); }
.nav-login { font-size: var(--text-sm); font-weight: 500; color: var(--color-text-secondary); padding: 0.5rem 1rem; border-radius: var(--radius-md); transition: color 0.2s; }
.nav-login:hover { color: var(--color-text); }
.nav-hamburger { display: none; flex-direction: column; gap: 5px; width: 32px; cursor: pointer; padding: var(--space-2); }
.nav-hamburger span { display: block; width: 100%; height: 2px; background: var(--color-text); border-radius: var(--radius-full); transition: all 0.3s ease; }
.nav-mobile { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: var(--color-bg); z-index: 999; flex-direction: column; align-items: center; justify-content: center; gap: var(--space-8); }
.nav-mobile.open { display: flex; }
.nav-mobile a { font-family: var(--font-display); font-size: var(--text-3xl); font-weight: 600; color: var(--color-text-secondary); transition: color 0.2s; }
.nav-mobile a:hover { color: var(--color-text); }
.nav-mobile-close { position: absolute; top: var(--space-6); right: var(--space-6); font-size: var(--text-2xl); cursor: pointer; color: var(--color-text-secondary); }
@media (max-width: 768px) { .nav-links, .nav-actions { display: none; } .nav-hamburger { display: flex; } }

.btn { display: inline-flex; align-items: center; gap: var(--space-2); padding: 0.875rem 2rem; border-radius: var(--radius-md); font-family: var(--font-display); font-weight: 600; font-size: var(--text-base); text-decoration: none; cursor: pointer; transition: all 0.2s ease; min-height: 48px; white-space: nowrap; }
.btn-primary { background: var(--gradient-primary); color: white; box-shadow: 0 0 20px var(--color-primary-glow); border: 1px solid transparent; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 40px var(--color-primary-glow), 0 8px 24px rgba(108,99,255,0.3); }
.btn-ghost { background: transparent; color: var(--color-text); border: 1px solid var(--color-border-bright); }
.btn-ghost:hover { border-color: var(--color-primary); background: rgba(108,99,255,0.08); color: var(--color-text); }
.btn-glow { background: var(--gradient-primary); color: white; padding: 1rem 2.5rem; font-size: var(--text-lg); border-radius: var(--radius-lg); box-shadow: 0 0 40px var(--color-primary-glow), 0 0 80px rgba(108,99,255,0.15); border: 1px solid rgba(108,99,255,0.4); }
.btn-glow:hover { transform: translateY(-3px); box-shadow: 0 0 60px var(--color-primary-glow), 0 0 120px rgba(108,99,255,0.2), 0 12px 32px rgba(108,99,255,0.35); }
.btn-sm { padding: 0.5rem 1.25rem; font-size: var(--text-sm); min-height: 36px; }

.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding-top: 80px; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; background: radial-gradient(ellipse at 30% 50%, rgba(108,99,255,0.18) 0%, transparent 60%), radial-gradient(ellipse at 70% 20%, rgba(0,212,255,0.1) 0%, transparent 50%), var(--color-bg); }
.hero-grid { position: absolute; inset: 0; z-index: 0; background-image: linear-gradient(rgba(108,99,255,0.07) 1px, transparent 1px), linear-gradient(90deg, rgba(108,99,255,0.07) 1px, transparent 1px); background-size: 60px 60px; mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%); }
.hero-content { position: relative; z-index: 1; max-width: 820px; }
.hero-badge { display: inline-flex; align-items: center; gap: var(--space-2); padding: 0.4rem 1rem; border-radius: var(--radius-full); border: 1px solid var(--color-border-bright); background: rgba(108,99,255,0.1); font-size: var(--text-sm); font-family: var(--font-mono); color: var(--color-accent); margin-bottom: var(--space-8); }
.hero-badge .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--color-success); box-shadow: 0 0 8px var(--color-success); animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.6; transform: scale(1.3); } }
.hero h1 { font-size: clamp(var(--text-5xl), 7vw, var(--text-7xl)); font-weight: 700; line-height: 1.05; letter-spacing: -0.04em; margin-bottom: var(--space-6); }
.text-gradient { background: var(--gradient-hero); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-sub { font-size: clamp(var(--text-lg), 2vw, var(--text-2xl)); color: var(--color-text-secondary); max-width: 56ch; line-height: 1.6; margin-bottom: var(--space-12); }
.hero-ctas { display: flex; align-items: center; gap: var(--space-4); flex-wrap: wrap; margin-bottom: var(--space-16); }
.hero-stats { display: flex; align-items: center; gap: var(--space-8); flex-wrap: wrap; border-top: 1px solid var(--color-border); padding-top: var(--space-8); }
.hero-stat-val { font-family: var(--font-display); font-size: var(--text-3xl); font-weight: 700; background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; display: block; }
.hero-stat-label { font-size: var(--text-sm); color: var(--color-text-muted); }

.timer-bar { background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-4) var(--space-6); display: inline-flex; align-items: center; gap: var(--space-4); font-family: var(--font-mono); font-size: var(--text-sm); color: var(--color-text-secondary); margin-bottom: var(--space-8); }
.timer-track { width: 200px; height: 4px; background: var(--color-border); border-radius: var(--radius-full); overflow: hidden; }
.timer-fill { height: 100%; background: var(--gradient-primary); border-radius: var(--radius-full); animation: timerFill 4s ease-in-out infinite; }
@keyframes timerFill { 0% { width: 0%; } 100% { width: 100%; } }
.timer-label { color: var(--color-success); }

.section-label { display: inline-block; font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-primary); margin-bottom: var(--space-4); }
.section-title { font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl)); font-weight: 700; margin-bottom: var(--space-4); letter-spacing: -0.03em; }
.section-sub { font-size: var(--text-lg); color: var(--color-text-secondary); max-width: 52ch; line-height: 1.7; }

.steps-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-8); position: relative; }
.steps-row::before { content: ''; position: absolute; top: 40px; left: calc(16.66% + 20px); right: calc(16.66% + 20px); height: 1px; background: linear-gradient(90deg, var(--color-primary), var(--color-accent)); opacity: 0.3; }
.step-item { text-align: center; position: relative; }
.step-num { width: 80px; height: 80px; border-radius: 50%; background: var(--gradient-primary); display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 700; color: white; margin: 0 auto var(--space-6); box-shadow: 0 0 30px var(--color-primary-glow); }
.step-title { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 600; margin-bottom: var(--space-3); }
.step-desc { font-size: var(--text-base); color: var(--color-text-secondary); line-height: 1.7; }
@media (max-width: 768px) { .steps-row { grid-template-columns: 1fr; } .steps-row::before { display: none; } }

.features-bento { display: grid; grid-template-columns: repeat(3, 1fr); grid-auto-rows: minmax(220px, auto); gap: var(--space-4); }
.feature-card { background: var(--gradient-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-8); position: relative; overflow: hidden; transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s; }
.feature-card::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at top left, rgba(108,99,255,0.1) 0%, transparent 60%); opacity: 0; transition: opacity 0.3s; }
.feature-card:hover { border-color: var(--color-primary); transform: translateY(-4px); box-shadow: 0 16px 40px rgba(108,99,255,0.15); }
.feature-card:hover::before { opacity: 1; }
.feature-card.span-2 { grid-column: span 2; }
.feature-card.span-2v { grid-row: span 2; }
.feature-icon { width: 48px; height: 48px; border-radius: var(--radius-md); background: rgba(108,99,255,0.15); border: 1px solid rgba(108,99,255,0.3); display: flex; align-items: center; justify-content: center; font-size: 1.5rem; margin-bottom: var(--space-6); }
.feature-title { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 600; margin-bottom: var(--space-3); }
.feature-desc { font-size: var(--text-base); color: var(--color-text-secondary); line-height: 1.7; }
.feature-tag { display: inline-block; padding: 0.25rem 0.75rem; border-radius: var(--radius-full); background: rgba(0,229,160,0.1); border: 1px solid rgba(0,229,160,0.3); font-size: var(--text-xs); font-family: var(--font-mono); color: var(--color-success); margin-top: var(--space-4); }
@media (max-width: 1024px) { .features-bento { grid-template-columns: 1fr 1fr; } .feature-card.span-2 { grid-column: span 2; } }
@media (max-width: 768px) { .features-bento { grid-template-columns: 1fr; } .feature-card.span-2 { grid-column: span 1; } .feature-card.span-2v { grid-row: span 1; } }

.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.gallery-card { border-radius: var(--radius-lg); overflow: hidden; background: var(--color-surface-2); border: 1px solid var(--color-border); transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s; cursor: pointer; }
.gallery-card:hover { transform: translateY(-6px); border-color: var(--color-border-bright); box-shadow: 0 20px 50px rgba(0,0,0,0.5); }
.gallery-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; transition: transform 0.4s ease; }
.gallery-card:hover .gallery-img { transform: scale(1.03); }
.gallery-info { padding: var(--space-4) var(--space-6); display: flex; align-items: center; justify-content: space-between; }
.gallery-industry { font-size: var(--text-xs); font-family: var(--font-mono); color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.1em; }
.gallery-built { font-size: var(--text-xs); color: var(--color-success); font-family: var(--font-mono); }
@media (max-width: 1024px) { .gallery-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px)  { .gallery-grid { grid-template-columns: 1fr; } }

.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.pricing-card { background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-8); display: flex; flex-direction: column; transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s; position: relative; }
.pricing-card:hover { border-color: var(--color-border-bright); transform: translateY(-4px); }
.pricing-card.featured { border-color: var(--color-primary); background: linear-gradient(180deg, rgba(108,99,255,0.12) 0%, var(--color-surface-2) 100%); box-shadow: 0 0 50px rgba(108,99,255,0.15), inset 0 1px 0 rgba(108,99,255,0.3); transform: scale(1.02); }
.pricing-card.featured:hover { transform: scale(1.02) translateY(-4px); }
.pricing-badge { position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: var(--gradient-primary); color: white; font-size: var(--text-xs); font-family: var(--font-mono); font-weight: 600; padding: 0.35rem 1rem; border-radius: var(--radius-full); letter-spacing: 0.08em; text-transform: uppercase; white-space: nowrap; }
.pricing-tier { font-family: var(--font-display); font-size: var(--text-sm); font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text-secondary); margin-bottom: var(--space-4); }
.pricing-price { font-family: var(--font-display); font-size: var(--text-6xl); font-weight: 700; letter-spacing: -0.04em; line-height: 1; margin-bottom: var(--space-2); }
.pricing-price sup { font-size: var(--text-2xl); vertical-align: top; margin-top: 0.8rem; color: var(--color-text-secondary); }
.pricing-period { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-6); }
.pricing-desc { font-size: var(--text-sm); color: var(--color-text-secondary); line-height: 1.7; margin-bottom: var(--space-8); padding-bottom: var(--space-8); border-bottom: 1px solid var(--color-border); }
.pricing-features { flex: 1; display: flex; flex-direction: column; gap: var(--space-3); margin-bottom: var(--space-8); }
.pricing-feature { display: flex; align-items: flex-start; gap: var(--space-3); font-size: var(--text-sm); color: var(--color-text-secondary); }
.pricing-feature .check { color: var(--color-success); flex-shrink: 0; font-size: 1rem; margin-top: 1px; }
@media (max-width: 1024px) { .pricing-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px)  { .pricing-grid { grid-template-columns: 1fr; } .pricing-card.featured { transform: scale(1); } }

.terminal { background: #080810; border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; font-family: var(--font-mono); }
.terminal-bar { background: var(--color-surface-2); padding: var(--space-3) var(--space-4); display: flex; align-items: center; gap: var(--space-3); border-bottom: 1px solid var(--color-border); }
.terminal-dots { display: flex; gap: var(--space-2); }
.terminal-dots span { width: 12px; height: 12px; border-radius: 50%; }
.terminal-dots span:nth-child(1) { background: #FF5F57; }
.terminal-dots span:nth-child(2) { background: #FFBD2E; }
.terminal-dots span:nth-child(3) { background: #28CA41; }
.terminal-title { font-size: var(--text-xs); color: var(--color-text-muted); flex: 1; text-align: center; }
.terminal-body { padding: var(--space-6); }
.terminal-line { font-size: var(--text-sm); line-height: 2; color: var(--color-text-secondary); }
.terminal-line .prompt { color: var(--color-primary); }
.terminal-line .cmd    { color: var(--color-text); }
.terminal-line .out    { color: var(--color-success); }
.terminal-line .dim    { color: var(--color-text-muted); }

.trust-bar { padding: var(--space-8) 0; border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.trust-label { font-size: var(--text-xs); font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.12em; color: var(--color-text-muted); text-align: center; margin-bottom: var(--space-6); }
.trust-logos { display: flex; align-items: center; justify-content: center; gap: var(--space-12); flex-wrap: wrap; }
.trust-logo { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 700; color: var(--color-text-muted); opacity: 0.5; transition: opacity 0.2s; }
.trust-logo:hover { opacity: 1; }

.testimonial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.testimonial-card { background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-8); display: flex; flex-direction: column; gap: var(--space-6); transition: border-color 0.3s, transform 0.3s; }
.testimonial-card:hover { border-color: var(--color-border-bright); transform: translateY(-4px); }
.testimonial-stars { color: #FFD700; font-size: 1rem; letter-spacing: 2px; }
.testimonial-text { font-size: var(--text-base); color: var(--color-text-secondary); line-height: 1.8; flex: 1; font-style: italic; }
.testimonial-author { display: flex; align-items: center; gap: var(--space-3); }
.testimonial-avatar { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; border: 2px solid var(--color-border-bright); }
.testimonial-name { font-family: var(--font-display); font-size: var(--text-base); font-weight: 600; }
.testimonial-role { font-size: var(--text-xs); color: var(--color-text-muted); }
@media (max-width: 768px) { .testimonial-grid { grid-template-columns: 1fr; } }

.cta-section { position: relative; overflow: hidden; text-align: center; }
.cta-glow { position: absolute; inset: 0; background: radial-gradient(ellipse at center, rgba(108,99,255,0.2) 0%, transparent 70%); pointer-events: none; }
.cta-title { font-size: clamp(var(--text-4xl), 5vw, var(--text-6xl)); font-weight: 700; letter-spacing: -0.04em; margin-bottom: var(--space-6); max-width: 16ch; margin-left: auto; margin-right: auto; }
.cta-sub { font-size: var(--text-lg); color: var(--color-text-secondary); max-width: 48ch; margin: 0 auto var(--space-10); line-height: 1.7; }

.faq-list { max-width: 760px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--color-border); }
.faq-q { display: flex; align-items: center; justify-content: space-between; padding: var(--space-6) 0; cursor: pointer; font-family: var(--font-display); font-size: var(--text-lg); font-weight: 500; color: var(--color-text); transition: color 0.2s; user-select: none; }
.faq-q:hover { color: var(--color-primary); }
.faq-arrow { width: 24px; height: 24px; border-radius: 50%; border: 1px solid var(--color-border-bright); display: flex; align-items: center; justify-content: center; color: var(--color-text-secondary); font-size: 0.75rem; transition: transform 0.3s, background 0.3s, border-color 0.3s; flex-shrink: 0; }
.faq-item.open .faq-arrow { transform: rotate(180deg); background: var(--color-primary); border-color: var(--color-primary); color: white; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; font-size: var(--text-base); color: var(--color-text-secondary); line-height: 1.8; }
.faq-item.open .faq-a { max-height: 400px; padding-bottom: var(--space-6); }

.footer { border-top: 1px solid var(--color-border); padding: var(--space-16) 0 var(--space-8); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--space-12); margin-bottom: var(--space-12); }
.footer-brand .logo-text { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 700; letter-spacing: -0.03em; margin-bottom: var(--space-4); }
.footer-tagline { font-size: var(--text-base); color: var(--color-text-secondary); line-height: 1.7; max-width: 32ch; margin-bottom: var(--space-6); }
.footer-col-title { font-family: var(--font-display); font-size: var(--text-sm); font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text); margin-bottom: var(--space-4); }
.footer-links { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-links a { font-size: var(--text-sm); color: var(--color-text-secondary); transition: color 0.2s; }
.footer-links a:hover { color: var(--color-text); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; padding-top: var(--space-8); border-top: 1px solid var(--color-border); font-size: var(--text-sm); color: var(--color-text-muted); flex-wrap: wrap; gap: var(--space-4); }
@media (max-width: 1024px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px)  { .footer-grid { grid-template-columns: 1fr; } }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

.text-center { text-align: center; }
.text-accent  { color: var(--color-accent); }
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-muted   { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.mb-4  { margin-bottom: var(--space-4); }
.mb-6  { margin-bottom: var(--space-6); }
.mb-8  { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }
.mb-16 { margin-bottom: var(--space-16); }
.mt-4  { margin-top: var(--space-4); }
.mt-6  { margin-top: var(--space-6); }
.mt-8  { margin-top: var(--space-8); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col { display: flex; flex-direction: column; }
.align-center { align-items: center; }
.divider { height: 1px; background: linear-gradient(90deg, transparent, var(--color-border), transparent); margin: var(--space-4) 0; }

img { opacity: 0; transition: opacity 0.4s ease; }
img.loaded { opacity: 1; }

.chat-wrapper { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: var(--space-16) var(--space-6); padding-top: calc(80px + var(--space-16)); background: radial-gradient(ellipse at 50% 0%, rgba(108,99,255,0.15) 0%, transparent 60%); }
.chat-box { width: 100%; max-width: 680px; background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius-xl); overflow: hidden; box-shadow: 0 40px 80px rgba(0,0,0,0.5), 0 0 80px rgba(108,99,255,0.1); }
.chat-header { background: var(--color-surface-3); border-bottom: 1px solid var(--color-border); padding: var(--space-4) var(--space-6); display: flex; align-items: center; gap: var(--space-3); }
.chat-avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--gradient-primary); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; font-weight: 700; color: white; font-family: var(--font-display); flex-shrink: 0; }
.chat-name { font-family: var(--font-display); font-size: var(--text-base); font-weight: 600; }
.chat-status { font-size: var(--text-xs); color: var(--color-success); font-family: var(--font-mono); }
.chat-messages { padding: var(--space-6); display: flex; flex-direction: column; gap: var(--space-4); min-height: 400px; max-height: 500px; overflow-y: auto; }
.msg { max-width: 80%; padding: var(--space-3) var(--space-4); border-radius: var(--radius-md); font-size: var(--text-base); line-height: 1.6; }
.msg-ai { background: var(--color-surface-3); border: 1px solid var(--color-border); border-radius: 4px var(--radius-md) var(--radius-md) var(--radius-md); align-self: flex-start; color: var(--color-text-secondary); }
.msg-user { background: var(--gradient-primary); color: white; border-radius: var(--radius-md) 4px var(--radius-md) var(--radius-md); align-self: flex-end; }
.chat-input-area { padding: var(--space-4) var(--space-6); border-top: 1px solid var(--color-border); display: flex; align-items: center; gap: var(--space-3); }
.chat-input { flex: 1; background: var(--color-surface-3); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-3) var(--space-4); font-family: var(--font-body); font-size: var(--text-base); color: var(--color-text); outline: none; transition: border-color 0.2s; }
.chat-input:focus { border-color: var(--color-primary); }
.chat-input::placeholder { color: var(--color-text-muted); }
.chat-send { width: 44px; height: 44px; border-radius: var(--radius-md); background: var(--gradient-primary); color: white; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; cursor: pointer; transition: transform 0.2s, box-shadow 0.2s; border: none; }
.chat-send:hover { transform: scale(1.05); box-shadow: 0 0 20px var(--color-primary-glow); }