/* Use border-box everywhere to avoid width/padding overflow */
*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  width: 100%;
  margin: 0;
  overflow-x: hidden; /* prevent horizontal scroll caused by padding/width combos */
}

body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: radial-gradient(circle at top left, rgba(74, 180, 255, 0.08), transparent 24%),
              radial-gradient(circle at bottom right, rgba(56, 189, 248, 0.05), transparent 24%),
              #08111d;
  color: #e5e7eb;
}

header {
  background: rgba(4, 10, 18, 0.85);
  padding: 20px 4%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(148, 163, 184, 0.14);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 9999;
  backdrop-filter: blur(12px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

#lang-toggle {
  border: 1px solid rgba(203, 213, 225, 0.24);
  background: rgba(255, 255, 255, 0.06);
  color: #e5e7eb;
  padding: 10px 16px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.2s ease, transform 0.2s ease;
}

#lang-toggle:hover,
#lang-toggle:focus {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-1px);
}

.logo {
  display: block;
  height: 48px;
  width: auto;
}

/* ensure page content isn't hidden behind fixed header */
body {
  padding-top: 80px;
}

nav a {
  color: #cbd5e1;
  margin: 0 14px;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

nav a:hover,
nav a:focus {
  color: #9dd7ff;
}

.page-hero {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  padding: 100px 0 60px;
  background: linear-gradient(180deg, rgba(8,17,29,0.96) 0%, rgba(8,17,29,0.84) 35%, rgba(8,17,29,0.78) 100%),
              radial-gradient(circle at top left, rgba(56, 189, 248, 0.12), transparent 25%),
              radial-gradient(circle at bottom right, rgba(29, 78, 216, 0.14), transparent 22%);
}

.hero-content {
  max-width: min(96vw, 1180px);
  margin: 0 auto;
  padding: 0 24px;
}

.hero-content h1 {
  font-size: clamp(3rem, 4.5vw, 4.8rem);
  line-height: 1.02;
  letter-spacing: -0.06em;
  margin-bottom: 20px;
}

.hero-content p {
  max-width: 82ch;
  color: #dbeafe;
  font-size: 1.05rem;
  margin-bottom: 26px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero-actions a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.2s ease, background 0.2s ease;
}

.hero-actions a.primary {
  background: #38bdf8;
  color: #08111d;
}

.hero-actions a.secondary {
  background: rgba(203, 213, 225, 0.12);
  color: #e5e7eb;
}

.hero-actions a:hover {
  transform: translateY(-1px);
}

.eyebrow {
  display: inline-block;
  margin-bottom: 18px;
  color: #38bdf8;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.82rem;
  font-weight: 700;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.feature-card {
  border-left: 4px solid #38bdf8;
  padding-left: 20px;
}

.feature-card h2 {
  color: #dbeafe;
}

@media (max-width: 920px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

.layout {
  display: grid;
  grid-template-columns: minmax(420px, 44%) 1fr;
  gap: 32px;
  align-items: start;
  width: 100%;
  max-width: 100%;
  margin: 0;
  padding: 0 4%; /* horizontal page padding */
}

.content-column {
  padding-top: 40px;
}

.container {
  max-width: min(96vw, 1180px);
  width: 100%;
  margin: 40px auto;
  padding: 0 24px;
}

h1 {
  color: #dbeafe;
  margin-bottom: 18px;
  font-size: clamp(2.4rem, 2.8vw, 3.4rem);
  letter-spacing: -0.05em;
}

h2 {
  color: #9dd7ff;
  margin-bottom: 12px;
  font-size: 1.55rem;
}

p {
  line-height: 1.75;
  color: #cbd5e1;
}

.card,
.sample {
  background: rgba(15, 23, 42, 0.94);
  border: 1px solid rgba(56, 189, 248, 0.12);
  box-shadow: 0 18px 55px rgba(0, 0, 0, 0.22);
  padding: 28px;
  border-radius: 12px;
  margin: 24px 0;
}

.sample {
  max-width: 100%;
}

.card h2,
.sample h2 {
  margin-top: 0;
}

footer {
  text-align: center;
  padding: 28px 4%;
  margin-top: 60px;
  border-top: 1px solid rgba(148, 163, 184, 0.12);
  font-size: 0.95rem;
}

header {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

.card,
.sample {
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
}

.card:hover,
.feature-card:hover,
.sample:hover {
  transform: translateY(-6px);
  border-color: rgba(56, 189, 248, 0.3);
  background: rgba(20, 30, 49, 0.98);
  box-shadow: 0 26px 80px rgba(0, 0, 0, 0.22);
}

.footer-links {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  justify-content: center;
  margin-bottom: 10px;
}

.footer-links a {
  color: #cbd5e1;
  text-decoration: none;
  font-weight: 500;
}

.footer-links img {
  height: 18px;
  width: auto;
  display: inline-block;
  vertical-align: middle;
}

.footer-copy {
  color: #94a3b8;
}

input, textarea {
  width: 100%;
  padding: 10px;
  margin: 8px 0;
  border: none;
  border-radius: 5px;
}

button {
  padding: 10px 20px;
  background: #38bdf8;
  border: none;
  cursor: pointer;
  border-radius: 5px;
}

button:hover {
  background: #0ea5e9;
}

#flow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: #0f172a;
}

/* Model container (left column) */
#model-container {
  position: relative;
  width: 100%;
  height: 60vh;
  z-index: 10;
  pointer-events: none;
  display: block;
  margin: 24px 0;
  overflow: hidden;
  border-radius: 20px;
  background: rgba(15, 23, 42, 0.88);
  border: 1px solid rgba(56, 189, 248, 0.14);
}

.placeholder {
  background: rgba(148, 163, 184, 0.08);
  border: 1px dashed rgba(148, 163, 184, 0.28);
  padding: 18px;
  border-radius: 18px;
  margin-top: 18px;
  color: #cbd5e1;
}

/* Parallax / hero background sections */
.parallax-hero,
.parallax-section {
  position: relative;
  min-height: 60vh;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  display: flex;
  align-items: center;
  justify-content: center;
}

.parallax-hero {
   position: relative;
 }
 
 .parallax-hero::before {
   content: "";
   position: absolute;
   inset: 0;
   background: rgba(5, 10, 18, 0.48);
   z-index: 1;
 }
 
 .parallax-hero .hero-inner {
   position: relative;
   z-index: 5; /* bring content above the background */
   padding: 48px 20px;
   width: min(92vw, 100%);
   max-width: 92vw;
   margin: 0 auto;
 }
 
 .parallax-section::after {
   /* subtle overlay to improve text contrast when needed */
   content: "";
   position: absolute;
   inset: 0;
   background: rgba(6, 8, 12, 0.25);
   z-index: 2;
 }

.parallax-hero .container,
.parallax-hero h1,
.parallax-hero p {
  color: #e6f6ff;
}

/* Ensure model container sits above overlays */
#model-container {
  z-index: 10;
  pointer-events: auto;
}

@media (max-width: 720px) {
  .parallax-hero,
  .parallax-section { background-attachment: scroll; }
}

/* Two-column layout for hero: model left, text right */
.hero-grid {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  width: 100%;
}

.hero-content-card {
  width: 100%;
  background: rgba(15, 23, 42, 0.88);
  border: 1px solid rgba(56, 189, 248, 0.16);
  border-radius: 24px;
  box-shadow: 0 18px 80px rgba(0, 0, 0, 0.16);
  padding: 28px;
}

.hero-grid .model-col {
  flex: 0 0 34%;
  min-width: 280px;
}

.hero-grid .text-col {
  flex: 1 1 66%;
}

.hero-grid .text-col h2,
.hero-grid .text-col p {
  color: #e5e7eb;
}

.hero-grid .model-col #model-container {
  height: 48vh;
  max-height: 560px;
}

@media (max-width: 920px) {
  .hero-grid { gap: 18px; }
}

@media (max-width: 720px) {
  .hero-grid { flex-direction: column-reverse; }
  .hero-grid .model-col { width: 100%; }
  .hero-grid .model-col #model-container { height: 40vh; }
}