/* ==========================================================================
   Spaoun - 3D Platform Website Stylesheet
   Brand Accent: #cddb30 (Electric Lime)
   Theme: High-Tech Dark / Maker Studio
   ========================================================================== */

:root {
  --bg-dark: #0a0e14;
  --bg-surface: #121820;
  --bg-surface-elevated: #1a232e;
  --bg-glass: rgba(18, 24, 32, 0.85);

  --accent-lime: #cddb30;
  --accent-lime-hover: #dfea42;
  --accent-lime-muted: rgba(205, 219, 48, 0.15);
  --accent-lime-glow: rgba(205, 219, 48, 0.35);

  --accent-cyan: #00d2ff;
  --accent-purple: #9d4edd;

  --text-primary: #f0f6fc;
  --text-secondary: #9aa5b1;
  --text-muted: #626d7a;

  --border-color: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(205, 219, 48, 0.3);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 25px var(--accent-lime-glow);

  --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'Space Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

body {
  line-height: 1.6;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, #151e29 0%, var(--bg-dark) 70%);
  min-height: 100vh;
}

a {
  color: var(--accent-lime);
  text-decoration: none;
  transition: var(--transition-smooth);
}

a:hover {
  color: var(--accent-lime-hover);
}

img, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

/* --------------------------------------------------------------------------
   Container & Layout
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-padding {
  padding: 5rem 0;
}

@media (min-width: 992px) {
  .section-padding {
    padding: 7rem 0;
  }
}

/* --------------------------------------------------------------------------
   Navigation Bar
   -------------------------------------------------------------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  background: rgba(10, 14, 20, 0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-smooth);
}

.navbar .nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo img.icon-mark {
  width: 38px;
  height: 38px;
  border-radius: 8px;
}

.brand-logo .brand-name {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  text-transform: uppercase;
}

.brand-logo .brand-name span {
  color: var(--accent-lime);
}

.nav-links {
  display: none;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-lime);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.btn-menu-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  transition: var(--transition-smooth);
}

@media (min-width: 992px) {
  .nav-links {
    display: flex;
  }
  .btn-menu-toggle {
    display: none;
  }
}

/* Mobile Slide-out Menu */
.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 320px;
  height: 100vh;
  background: var(--bg-surface-elevated);
  border-left: 1px solid var(--border-color);
  padding: 6rem 2rem 2rem;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-nav.open {
  right: 0;
}

.mobile-nav a {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
}

.mobile-nav a:hover {
  color: var(--accent-lime);
}

.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 998;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.mobile-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* --------------------------------------------------------------------------
   Buttons & UI Components
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.8rem 1.6rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--accent-lime);
  color: #000000;
  border-color: var(--accent-lime);
}

.btn-primary:hover {
  background-color: var(--accent-lime-hover);
  color: #000000;
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border-color: var(--accent-lime);
  transform: translateY(-2px);
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  background: var(--accent-lime-muted);
  color: var(--accent-lime);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-full);
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
  padding-top: 9rem;
  padding-bottom: 5rem;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 992px) {
  .hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
  }
}

.hero-copy h1 {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin: 1.25rem 0 1rem;
}

@media (min-width: 768px) {
  .hero-copy h1 {
    font-size: 3.5rem;
  }
}

.hero-copy h1 .highlight-text {
  color: var(--accent-lime);
  position: relative;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-stats {
  display: flex;
  gap: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.hero-stat-item .stat-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.hero-stat-item .stat-value span {
  color: var(--accent-lime);
}

.hero-stat-item .stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Hero 3D Card */
.hero-3d-card {
  position: relative;
  background: radial-gradient(circle at 50% 40%, #1e2836 0%, #0d1218 80%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card), 0 0 35px rgba(205, 219, 48, 0.1);
  overflow: hidden;
  padding: 1rem;
}

.hero-3d-card model-viewer {
  width: 100%;
  height: 420px;
  --poster-color: transparent;
  outline: none;
}

.model-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
}

.model-header-bar .model-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-lime);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.model-header-bar .model-title i {
  animation: spin 8s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.model-controls-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0.5rem 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
}

.btn-ctrl {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.btn-ctrl:hover {
  background: var(--accent-lime);
  color: #000;
}

/* --------------------------------------------------------------------------
   Pillars Section (3-Column Desktop Grid)
   -------------------------------------------------------------------------- */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3.5rem;
}

.section-header h2 {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin: 0.75rem 0 1rem;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.pillar-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

@media (min-width: 992px) {
  .pillar-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pillar-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.5rem 2rem;
  transition: var(--transition-smooth);
  position: relative;
  display: flex;
  flex-direction: column;
}

.pillar-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-card);
}

.pillar-number {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-lime);
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.pillar-icon {
  width: 54px;
  height: 54px;
  border-radius: 12px;
  background: var(--accent-lime-muted);
  color: var(--accent-lime);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

.pillar-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
  color: var(--text-primary);
}

.pillar-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Drag & Drop 3D File Inspector Sandbox
   -------------------------------------------------------------------------- */
.inspector-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-card);
}

.drop-zone {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 3rem 1.5rem;
  text-align: center;
  background: rgba(255, 255, 255, 0.015);
  cursor: pointer;
  transition: var(--transition-smooth);
  position: relative;
}

.drop-zone.dragover {
  border-color: var(--accent-lime);
  background: var(--accent-lime-muted);
}

.drop-icon {
  font-size: 3rem;
  color: var(--accent-lime);
  margin-bottom: 1rem;
}

.drop-zone h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.drop-zone p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.drop-samples {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
}

.drop-samples span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.inspector-stage {
  display: none;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

@media (min-width: 992px) {
  .inspector-stage {
    grid-template-columns: 1.3fr 0.7fr;
  }
}

.inspector-stage.active {
  display: grid;
}

.stage-viewport {
  position: relative;
  background: radial-gradient(circle at 50% 50%, #17212e 0%, #0a0e14 90%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  height: 380px;
  overflow: hidden;
}

.stage-viewport model-viewer {
  width: 100%;
  height: 100%;
  outline: none;
}

.stage-info {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.info-header h4 {
  font-size: 1.15rem;
  color: var(--accent-lime);
  margin-bottom: 0.25rem;
  word-break: break-all;
}

.info-header .info-format {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.info-table {
  margin: 1.25rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.info-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.info-row .label {
  color: var(--text-secondary);
}

.info-row .val {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-primary);
}

.readiness-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.8rem;
  background: rgba(205, 219, 48, 0.15);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--accent-lime);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   App Showcase Rows
   -------------------------------------------------------------------------- */
.showcase-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
  margin-bottom: 5rem;
}

@media (min-width: 992px) {
  .showcase-row {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }

  .showcase-row.reverse {
    direction: rtl;
  }

  .showcase-row.reverse .showcase-text {
    direction: ltr;
  }
}

.showcase-text h3 {
  font-size: 2rem;
  font-weight: 800;
  margin: 0.85rem 0 1rem;
  letter-spacing: -0.5px;
}

.showcase-text p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.feature-list li i {
  color: var(--accent-lime);
  margin-top: 0.25rem;
}

.showcase-visual {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.mockup-frame {
  background: #080c11;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mockup-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.mockup-meta {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.mockup-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--accent-lime-muted);
  color: var(--accent-lime);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* --------------------------------------------------------------------------
   Format Matrix (STL, OBJ, GLB, 3MF)
   -------------------------------------------------------------------------- */
.format-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 576px) {
  .format-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .format-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.format-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: var(--transition-smooth);
}

.format-card:hover {
  border-color: var(--border-highlight);
  transform: translateY(-4px);
}

.format-ext {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-lime);
  padding: 0.5rem 1rem;
  background: var(--accent-lime-muted);
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
}

.format-card h4 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.format-card p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* --------------------------------------------------------------------------
   CTA Section
   -------------------------------------------------------------------------- */
.cta-section {
  position: relative;
  background: radial-gradient(circle at 50% 50%, #1e2838 0%, var(--bg-dark) 90%);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  text-align: center;
  padding: 6rem 0;
}

.cta-content {
  max-width: 650px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 1rem;
}

.cta-content p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  background: #06090d;
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 1rem;
  max-width: 320px;
}

.footer-col h5 {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-col ul a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-col ul a:hover {
  color: var(--accent-lime);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
  }
}

.social-links {
  display: flex;
  gap: 1.25rem;
}

.social-links a {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.social-links a:hover {
  color: var(--accent-lime);
}

/* --------------------------------------------------------------------------
   Subpage Layouts (About, Contact, Legal)
   -------------------------------------------------------------------------- */
.subpage-header {
  padding-top: 8rem;
  padding-bottom: 3rem;
  text-align: center;
  background: radial-gradient(circle at 50% 0%, #151e29 0%, var(--bg-dark) 80%);
  border-bottom: 1px solid var(--border-color);
}

.subpage-header h1 {
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.subpage-header p {
  color: var(--text-secondary);
  font-size: 1.15rem;
}

.content-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin: 3rem auto;
  max-width: 860px;
  box-shadow: var(--shadow-card);
}

.content-card h2, .content-card h3 {
  margin: 2rem 0 1rem;
  color: var(--text-primary);
}

.content-card h2:first-child, .content-card h3:first-child {
  margin-top: 0;
}

.content-card p, .content-card ul, .content-card ol {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  font-size: 1rem;
  line-height: 1.7;
}

.content-card ul, .content-card ol {
  padding-left: 1.5rem;
}

.content-card li {
  margin-bottom: 0.5rem;
}

.step-callout {
  background: rgba(205, 219, 48, 0.08);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  margin: 1.5rem 0;
}

.step-callout h4 {
  color: var(--accent-lime);
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
}

.breadcrumb-path {
  display: inline-block;
  background: var(--bg-surface-elevated);
  color: var(--accent-lime);
  font-family: var(--font-mono);
  font-weight: 700;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  border: 1px solid var(--border-color);
}