/* ============================================
   Regen Studio Demos — Design System & Styles
   ============================================ */

/* --- Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Playfair+Display:wght@400;500;600;700&display=swap');

/* --- Design Tokens --- */
:root {
  /* Colors — Navy */
  --navy: #243644;
  --navy-dark: #1B2833;
  --navy-light: #5781A1;

  /* Colors — Emerald */
  --emerald: #00914B;
  --emerald-hover: #006937;
  --emerald-light: #AFF9D7;

  /* Colors — Teal */
  --teal: #009BBB;
  --teal-light: #BBF0F8;

  /* Colors — Accent */
  --magenta: #93093F;
  --orange: #FFA92D;

  /* Colors — Neutral */
  --text-primary: #243644;
  --text-secondary: #5781A1;
  --text-muted: #9B9B9B;
  --bg: #FAFBFC;
  --surface: #FFFFFF;
  --border: #E4E2E2;
  --warm-gray: #E4E2E2;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* Radius */
  --radius-sm: 8px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(36, 54, 68, 0.06), 0 1px 2px rgba(36, 54, 68, 0.04);
  --shadow-md: 0 4px 16px rgba(36, 54, 68, 0.08), 0 2px 4px rgba(36, 54, 68, 0.04);
  --shadow-lg: 0 12px 40px rgba(36, 54, 68, 0.1), 0 4px 12px rgba(36, 54, 68, 0.04);
  --shadow-xl: 0 20px 60px rgba(36, 54, 68, 0.12), 0 8px 20px rgba(36, 54, 68, 0.06);

  /* Transition */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --duration: 0.3s;
}

/* --- Reset & Base --- */
*, *::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-sans);
  color: var(--text-primary);
  background: var(--bg);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header-logo img {
  height: 36px;
  width: auto;
}

.header-logo span {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-secondary);
  opacity: 0.7;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.header-nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--duration) var(--ease);
}

.header-nav a:hover {
  color: var(--text-primary);
}

/* --- Hero --- */
.hero {
  text-align: center;
  padding: var(--space-4xl) var(--space-lg) var(--space-3xl);
  max-width: 800px;
  margin: 0 auto;
}

.hero-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--emerald);
  background: var(--emerald-light);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 600;
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* --- Polygon Divider --- */
.polygon-divider {
  width: 100%;
  overflow: hidden;
  line-height: 0;
}

.polygon-divider svg {
  width: 100%;
  height: 48px;
  display: block;
}

/* --- Demo Grid --- */
.demos-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-lg);
}

#demos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-xl);
}

/* --- Demo Card --- */
.demo-card {
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
  display: flex;
  flex-direction: column;
}

.demo-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.demo-card-preview {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.demo-card-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.demo-card-preview .placeholder-icon {
  font-size: 3rem;
  opacity: 0.3;
  color: white;
}

.demo-card-category {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: white;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(8px);
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.demo-card-body {
  padding: var(--space-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.demo-card-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.demo-card-body .subtitle {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.demo-card-body .description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-md);
  flex: 1;
}

.demo-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.demo-card-tags span {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
}

.demo-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--emerald);
  transition: gap var(--duration) var(--ease);
}

.demo-card:hover .demo-card-link {
  gap: 10px;
}

/* --- CTA Section --- */
.cta-section {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  max-width: 600px;
  margin: 0 auto;
}

.cta-section h2 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.cta-section p {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

/* --- Copyable Email --- */
.email-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 8px 8px 8px 20px;
  font-size: 0.9rem;
  transition: border-color var(--duration) var(--ease);
}

.email-pill:hover {
  border-color: var(--navy-light);
}

.email-pill .email-address {
  color: var(--text-primary);
  font-weight: 500;
  user-select: all;
}

.email-pill .copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: var(--emerald);
  color: white;
  border: none;
  border-radius: var(--radius-full);
  padding: 8px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background var(--duration) var(--ease);
  white-space: nowrap;
}

.email-pill .copy-btn:hover {
  background: var(--emerald-hover);
}

.email-pill .copy-btn.copied {
  background: var(--navy);
}

/* --- Footer --- */
.site-footer {
  background: var(--navy-dark);
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  font-size: 0.85rem;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  transition: color var(--duration) var(--ease);
}

.site-footer a:hover {
  color: white;
}

/* ============================================
   Password Gate Page
   ============================================ */

.gate-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    linear-gradient(135deg, rgba(36, 54, 68, 0.03) 25%, transparent 25%),
    linear-gradient(225deg, rgba(0, 145, 75, 0.03) 25%, transparent 25%),
    var(--bg);
}

.gate-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl) var(--space-lg);
}

.gate-card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 440px;
  padding: var(--space-2xl);
}

.gate-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  transition: color var(--duration) var(--ease);
}

.gate-back:hover {
  color: var(--text-primary);
}

.gate-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.gate-lock-icon {
  width: 48px;
  height: 48px;
  background: var(--emerald-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
}

.gate-lock-icon svg {
  width: 24px;
  height: 24px;
  color: var(--emerald);
}

.gate-header h1 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 4px;
}

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

/* Gate Form */
.gate-form {
  margin-bottom: var(--space-lg);
}

.gate-form label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.gate-input-group {
  display: flex;
  gap: var(--space-sm);
}

.gate-input-group input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: var(--font-sans);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}

.gate-input-group input:focus {
  border-color: var(--emerald);
  box-shadow: 0 0 0 3px rgba(0, 145, 75, 0.1);
}

.gate-input-group input.error {
  border-color: #E71846;
  box-shadow: 0 0 0 3px rgba(231, 24, 70, 0.1);
}

.gate-submit {
  padding: 12px 24px;
  background: var(--emerald);
  color: white;
  border: none;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background var(--duration) var(--ease);
  white-space: nowrap;
}

.gate-submit:hover {
  background: var(--emerald-hover);
}

.gate-error {
  margin-top: var(--space-sm);
  font-size: 0.82rem;
  color: #E71846;
  display: none;
}

.gate-error.visible {
  display: block;
}

/* Gate Divider */
.gate-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: var(--space-lg) 0;
}

/* Gate Access Info */
.gate-access {
  text-align: center;
}

.gate-access p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.gate-access .note {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: var(--space-md);
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 768px) {
  .header-nav {
    display: none;
  }

  .hero {
    padding: var(--space-3xl) var(--space-md) var(--space-2xl);
  }

  .hero p {
    font-size: 1rem;
  }

  #demos-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .demos-section {
    padding: var(--space-2xl) var(--space-md);
  }

  .gate-card {
    padding: var(--space-lg);
  }

  .gate-input-group {
    flex-direction: column;
  }

  .gate-submit {
    width: 100%;
  }

  .cta-section {
    padding: var(--space-2xl) var(--space-md);
  }

  .email-pill {
    flex-direction: column;
    padding: var(--space-md);
    gap: var(--space-sm);
  }
}