/* ========================================
   KIRIOKO — AI Company Website
   Design System & Styles
   ======================================== */

/* --- CSS Custom Properties --- */
:root {
  --bg-primary: #050a15;
  --bg-secondary: #0a1628;
  --bg-tertiary: #0f1d32;
  --bg-card: rgba(15, 25, 50, 0.5);
  --bg-card-hover: rgba(20, 35, 70, 0.6);

  --accent-teal: #00d4aa;
  --accent-cyan: #00b4d8;
  --accent-blue: #0077ff;
  --accent-purple: #7c3aed;
  --accent-pink: #e040a0;

  --gradient-primary: linear-gradient(135deg, #00d4aa, #00b4d8, #0077ff);
  --gradient-accent: linear-gradient(135deg, #0077ff, #7c3aed);
  --gradient-glow: linear-gradient(135deg, rgba(0,212,170,0.15), rgba(0,180,216,0.08), transparent);

  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-white: #ffffff;

  --border-subtle: rgba(255,255,255,0.06);
  --border-light: rgba(255,255,255,0.1);
  --border-accent: rgba(0,212,170,0.3);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --shadow-glow: 0 0 40px rgba(0,212,170,0.15);
  --shadow-card: 0 4px 30px rgba(0,0,0,0.3);
  --shadow-button: 0 0 20px rgba(0,212,170,0.3);

  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;

  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-spring: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea { font-family: inherit; }

/* --- Utility --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 120px 0;
  position: relative;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Noise Overlay --- */
.noise-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 128px 128px;
}

/* --- Floating Orbs --- */
.orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}
.orb-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(0,212,170,0.2), transparent 70%);
  top: -10%; left: -10%;
  animation: orbFloat1 20s ease-in-out infinite;
}
.orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(0,119,255,0.15), transparent 70%);
  top: 50%; right: -8%;
  animation: orbFloat2 25s ease-in-out infinite;
}
.orb-3 {
  width: 350px; height: 350px;
  background: radial-gradient(circle, rgba(124,58,237,0.12), transparent 70%);
  bottom: 10%; left: 20%;
  animation: orbFloat3 22s ease-in-out infinite;
}

@keyframes orbFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(60px, 40px) scale(1.1); }
  66% { transform: translate(-30px, 80px) scale(0.95); }
}
@keyframes orbFloat2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-50px, -30px) scale(1.05); }
  66% { transform: translate(40px, -60px) scale(0.9); }
}
@keyframes orbFloat3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(70px, -40px) scale(1.08); }
  66% { transform: translate(-40px, 30px) scale(0.92); }
}

/* ========================================
   NAVIGATION
   ======================================== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--transition-base);
}

#navbar.scrolled {
  padding: 12px 0;
  background: rgba(5,10,21,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 1001;
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 3px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  transition: color var(--transition-fast);
}

.nav-links a:not(.nav-cta):hover {
  color: var(--text-white);
}

.nav-links a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--gradient-primary);
  border-radius: 1px;
  transition: width var(--transition-base);
}

.nav-links a:not(.nav-cta):hover::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 24px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: var(--bg-primary) !important;
  font-weight: 600;
  font-size: 0.85rem;
  transition: all var(--transition-base);
  box-shadow: 0 0 20px rgba(0,212,170,0.2);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-button);
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  z-index: 1001;
  padding: 4px;
}

.mobile-toggle span {
  width: 24px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.mobile-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ========================================
   HERO SECTION
   ======================================== */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
}

#particleCanvas {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 850px;
  margin: 0 auto;
  padding: 0 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  background: rgba(0,212,170,0.08);
  border: 1px solid rgba(0,212,170,0.2);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--accent-teal);
  margin-bottom: 32px;
  animation: fadeInDown 0.8s ease forwards;
}

.badge-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent-teal);
  animation: pulse 2s ease-in-out infinite;
}

.hero-content h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--text-white);
  margin-bottom: 24px;
  animation: fadeInUp 0.8s ease 0.15s both;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 640px;
  margin: 0 auto 40px;
  animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.45s both;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--bg-primary);
  box-shadow: 0 0 25px rgba(0,212,170,0.25);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 40px rgba(0,212,170,0.4);
}

.btn-primary .btn-arrow {
  transition: transform var(--transition-base);
}

.btn-primary:hover .btn-arrow {
  transform: translateX(4px);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-secondary:hover {
  border-color: var(--accent-teal);
  background: rgba(0,212,170,0.05);
  transform: translateY(-3px);
}

/* --- Scroll Indicator --- */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  animation: fadeIn 1s ease 1s both;
}

.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--accent-teal), transparent);
  position: relative;
  overflow: hidden;
}

.scroll-line::after {
  content: '';
  position: absolute;
  top: -100%;
  width: 100%;
  height: 40%;
  background: var(--accent-teal);
  animation: scrollDown 2s ease-in-out infinite;
}

/* ========================================
   SECTION HEADERS
   ======================================== */
.section-header {
  text-align: center;
  margin-bottom: 70px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent-teal);
  margin-bottom: 16px;
}

.section-label::before,
.section-label::after {
  content: '';
  width: 20px;
  height: 1px;
  background: var(--accent-teal);
  opacity: 0.5;
}

.section-header h2 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -1px;
  color: var(--text-white);
  margin-bottom: 16px;
}

.section-header p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 20px;
  line-height: 1.8;
}

.about-text p:first-child::first-letter {
  font-size: 3rem;
  font-family: var(--font-heading);
  font-weight: 700;
  float: left;
  margin-right: 12px;
  line-height: 1;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.stat-card {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.stat-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ========================================
   PRODUCT SECTION
   ======================================== */
#product {
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
}

.product-hero-card {
  max-width: 700px;
  margin: 0 auto 60px;
  padding: 48px;
  border-radius: var(--radius-xl);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(20px);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.product-hero-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-xl);
  padding: 1px;
  background: var(--gradient-primary);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.3;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.product-hero-card:hover::before {
  opacity: 0.6;
}

.product-hero-card .product-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(0,212,170,0.15), rgba(0,119,255,0.15));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.product-hero-card .product-icon::after {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle, rgba(0,212,170,0.1), transparent);
  animation: breathe 3s ease-in-out infinite;
}

.product-hero-card .product-icon svg {
  width: 40px;
  height: 40px;
  color: var(--accent-teal);
}

.product-hero-card h3 {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 4px;
}

.product-hero-card .product-tag {
  font-size: 0.9rem;
  color: var(--accent-teal);
  font-weight: 500;
  margin-bottom: 20px;
}

.product-hero-card .product-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
}

/* --- Features Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  padding: 32px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.feature-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(0,212,170,0.1), rgba(0,119,255,0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  transition: all var(--transition-base);
}

.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, rgba(0,212,170,0.2), rgba(0,119,255,0.2));
  transform: scale(1.05);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  color: var(--accent-teal);
}

.feature-card h4 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-white);
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========================================
   USE CASES SECTION
   ======================================== */
.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.use-case-card {
  padding: 36px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
  position: relative;
}

.use-case-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
}

.use-case-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.use-case-icon svg {
  width: 26px;
  height: 26px;
}

.uc-accessibility .use-case-icon { background: rgba(0,212,170,0.12); color: var(--accent-teal); }
.uc-automation .use-case-icon { background: rgba(0,180,216,0.12); color: var(--accent-cyan); }
.uc-development .use-case-icon { background: rgba(0,119,255,0.12); color: var(--accent-blue); }
.uc-documents .use-case-icon { background: rgba(124,58,237,0.12); color: var(--accent-purple); }
.uc-productivity .use-case-icon { background: rgba(224,64,160,0.12); color: var(--accent-pink); }
.uc-universal .use-case-icon { background: rgba(0,212,170,0.12); color: var(--accent-teal); }

.use-case-card h4 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 10px;
}

.use-case-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========================================
   WAITLIST SECTION
   ======================================== */
#waitlist {
  background: linear-gradient(180deg, var(--bg-primary), var(--bg-secondary));
}

.waitlist-card {
  max-width: 650px;
  margin: 0 auto;
  padding: 56px 48px;
  border-radius: var(--radius-xl);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(20px);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.waitlist-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-xl);
  padding: 1px;
  background: var(--gradient-primary);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.25;
  pointer-events: none;
}

.waitlist-card h2 {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 12px;
}

.waitlist-card > p {
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-size: 1rem;
}

.waitlist-form {
  display: flex;
  gap: 12px;
  max-width: 460px;
  margin: 0 auto;
}

.waitlist-form input {
  flex: 1;
  padding: 14px 20px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-light);
  background: rgba(255,255,255,0.04);
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: all var(--transition-base);
}

.waitlist-form input::placeholder {
  color: var(--text-muted);
}

.waitlist-form input:focus {
  border-color: var(--accent-teal);
  box-shadow: 0 0 0 3px rgba(0,212,170,0.1);
}

.waitlist-form button {
  padding: 14px 28px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: var(--bg-primary);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.waitlist-form button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-button);
}

.waitlist-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 16px;
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: start;
}

.contact-form {
  padding: 40px;
  border-radius: var(--radius-xl);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: rgba(255,255,255,0.03);
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: all var(--transition-base);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent-teal);
  box-shadow: 0 0 0 3px rgba(0,212,170,0.08);
}

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

.contact-info-cards {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-card {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: all var(--transition-base);
}

.contact-card:hover {
  border-color: var(--border-accent);
  transform: translateX(4px);
}

.contact-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(0,212,170,0.1), rgba(0,119,255,0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-card-icon svg {
  width: 20px;
  height: 20px;
  color: var(--accent-teal);
}

.contact-card h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 4px;
}

.contact-card p,
.contact-card a {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.contact-card a:hover {
  color: var(--accent-teal);
}

/* ========================================
   FOOTER
   ======================================== */
footer {
  padding: 48px 0 32px;
  border-top: 1px solid var(--border-subtle);
  position: relative;
  z-index: 1;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-brand .logo-text {
  font-size: 1.2rem;
}

.footer-tagline {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ========================================
   ANIMATIONS & KEYFRAMES
   ======================================== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

@keyframes breathe {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.15); opacity: 0.8; }
}

@keyframes scrollDown {
  0% { top: -100%; }
  100% { top: 200%; }
}

@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

/* --- Scroll Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.revealed {
  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; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
  .features-grid,
  .use-cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .section { padding: 80px 0; }

  .mobile-toggle { display: flex; }

  .nav-links {
    position: fixed;
    inset: 0;
    background: rgba(5,10,21,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 28px;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
  }

  .nav-links.active {
    opacity: 1;
    pointer-events: all;
  }

  .nav-links a { font-size: 1.2rem; }

  .hero-content h1 { font-size: 2.4rem; }

  .features-grid,
  .use-cases-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .waitlist-form {
    flex-direction: column;
  }

  .product-hero-card { padding: 32px 24px; }
  .waitlist-card { padding: 36px 24px; }
  .contact-form { padding: 28px 20px; }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-brand { flex-direction: column; }
}

@media (max-width: 480px) {
  .hero-content h1 { font-size: 2rem; }
  .section-header h2 { font-size: 1.8rem; }
  .about-stats { grid-template-columns: 1fr; }
}