/* ============================================
   E10 Media -- Shared Stylesheet
   v1.0 -- March 2026
   ============================================ */

/* --- DESIGN TOKENS --- */
:root {
  --color-primary:          #162D50;
  --color-primary-light:    #3D6A9E;
  --color-primary-lighter:  #DAE4EF;
  --color-primary-dark:     #0F2240;
  --color-primary-deep:     #0A1929;

  --color-secondary:        #4A90D9;
  --color-secondary-light:  #7CB3E8;
  --color-secondary-lighter:#D6E8F7;
  --color-secondary-dark:   #3570B0;

  --color-bg:               #FAF8F5;
  --color-bg-mid:           #EFECE7;
  --color-bg-dim:           #E4E0DA;
  --color-muted:            #C5BFB5;
  --color-subtle:           #8A8378;
  --color-text:             #3D3830;
  --color-text-dark:        #1C1915;

  --color-accent:           #2BA89C;
  --color-accent-light:     #7FCEC6;
  --color-accent-dark:      #1D7A71;
  --color-accent-text:      #1A7D74;

  --color-gold:             #D4A95A;

  --color-success:          #2BA89C;
  --color-warning:          #D4952B;
  --color-error:            #C9432F;
  --color-info:             #4A8AC7;

  --font-display:           'Sora', system-ui, sans-serif;
  --font-body:              'Outfit', -apple-system, 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:  1.563rem;
  --text-3xl:  1.953rem;
  --text-4xl:  2.441rem;
  --text-5xl:  3.052rem;
  --text-6xl:  3.815rem;

  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.5rem;
  --space-6:  2rem;
  --space-7:  3rem;
  --space-8:  4rem;
  --space-9:  6rem;
  --space-10: 8rem;

  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   16px;
  --radius-xl:   24px;
  --radius-full: 9999px;

  --shadow-sm:  0 1px 2px rgba(22, 45, 80, 0.06);
  --shadow-md:  0 4px 12px rgba(22, 45, 80, 0.08);
  --shadow-lg:  0 8px 32px rgba(22, 45, 80, 0.12);
  --shadow-xl:  0 16px 48px rgba(22, 45, 80, 0.16);

  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast:   150ms;
  --duration-normal: 300ms;
  --duration-slow:   500ms;

  --max-width: 1200px;
  --content-width: 720px;
}

/* --- RESET & BASE --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* --- UTILITIES --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-5);
}
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent-text);
}
.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-text-dark);
  letter-spacing: -0.02em;
}

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  line-height: 1.2;
  text-decoration: none;
}
.btn-copper {
  background: var(--color-secondary);
  color: #fff;
}
.btn-copper:hover {
  background: var(--color-secondary-dark);
  box-shadow: 0 4px 20px rgba(74, 144, 217, 0.35);
  transform: translateY(-1px);
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.btn-accent {
  background: var(--color-accent);
  color: #fff;
}
.btn-accent:hover {
  background: var(--color-accent-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}
.btn-outline-light {
  background: transparent;
  color: var(--color-bg);
  border-color: rgba(250, 248, 245, 0.3);
}
.btn-outline-light:hover {
  background: var(--color-bg);
  color: var(--color-primary-deep);
  border-color: var(--color-bg);
}
.btn-ghost {
  background: transparent;
  color: var(--color-subtle);
  padding: 0.75rem 1rem;
}
.btn-ghost:hover {
  background: var(--color-bg-mid);
  color: var(--color-text-dark);
}
.btn-lg {
  padding: 1rem 2.25rem;
  font-size: var(--text-base);
}

/* --- TAGS --- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.02em;
}
.tag-primary { background: var(--color-primary-lighter); color: var(--color-primary); }
.tag-secondary { background: var(--color-secondary-lighter); color: var(--color-secondary-dark); }
.tag-accent { background: rgba(43, 168, 156, 0.12); color: var(--color-accent-text); }
.tag-neutral { background: var(--color-bg-dim); color: var(--color-subtle); }

/* --- NAVIGATION --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 248, 245, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-bg-dim);
  transition: background var(--duration-normal) var(--ease-out);
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.nav-logo {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: 0.02em;
  text-decoration: none;
}
.nav-logo .logo-dot {
  color: var(--color-secondary);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.nav-links a {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) var(--ease-out);
}
.nav-links a:hover {
  color: var(--color-primary);
  background: var(--color-bg-mid);
}
.nav-links a.active {
  color: var(--color-primary);
  background: var(--color-primary-lighter);
}
.nav-cta {
  margin-left: var(--space-3);
}
.nav-links a.btn-copper {
  color: #fff;
  background: var(--color-secondary);
}
.nav-links a.btn-copper:hover {
  color: #fff;
  background: var(--color-secondary-dark);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-dark);
  border-radius: 2px;
  transition: all var(--duration-fast) var(--ease-out);
}

/* --- FOOTER --- */
.footer {
  background: var(--color-primary-deep);
  color: var(--color-muted);
  padding: var(--space-9) 0 var(--space-6);
  border-top: 1px solid var(--color-gold);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-7);
  margin-bottom: var(--space-8);
}
.footer-brand {
  max-width: 320px;
}
.footer-logo {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-bg);
  margin-bottom: var(--space-4);
}
.footer-tagline {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-subtle);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
}
.footer-brand p {
  font-size: var(--text-sm);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}
.footer-col h4 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-bg);
  margin-bottom: var(--space-4);
}
.footer-col a {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-muted);
  padding: var(--space-1) 0;
  transition: color var(--duration-fast) var(--ease-out);
}
.footer-col a:hover {
  color: var(--color-secondary-light);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--space-5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  font-family: var(--font-mono);
}
.footer-bottom a {
  color: var(--color-muted);
  transition: color var(--duration-fast) var(--ease-out);
}
.footer-bottom a:hover { color: var(--color-accent-light); }
.footer-certifications {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.footer-cert-badge {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-accent-light);
  padding: var(--space-1) var(--space-3);
  border: 1px solid rgba(43, 168, 156, 0.25);
  border-radius: var(--radius-full);
}

/* --- REAL IMAGES --- */
.img-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

/* --- PLACEHOLDER IMAGES --- */
.placeholder-img {
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: var(--radius-lg);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  position: relative;
}
.placeholder-img::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 50%, rgba(0,0,0,0.15) 100%);
  pointer-events: none;
  z-index: 1;
  border-radius: inherit;
}
.placeholder-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: 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)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  border-radius: inherit;
  z-index: 2;
}
.placeholder-img.interior {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
}
.placeholder-img.aerial {
  background: linear-gradient(180deg, var(--color-primary-dark), var(--color-accent-dark));
}
.placeholder-img.exterior {
  background: linear-gradient(45deg, var(--color-secondary-dark), var(--color-secondary));
}
.placeholder-img.twilight {
  background: linear-gradient(200deg, var(--color-primary-deep), var(--color-secondary-dark));
}
.placeholder-img.portrait {
  background: linear-gradient(160deg, var(--color-secondary), var(--color-gold));
}
.placeholder-img.video {
  background: linear-gradient(120deg, var(--color-primary-deep), var(--color-primary));
}

/* --- PLACEHOLDER VIDEO --- */
.placeholder-video {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary-deep), var(--color-primary));
  border-radius: var(--radius-lg);
  position: relative;
  cursor: pointer;
}
.placeholder-video::after {
  content: '';
  width: 64px;
  height: 64px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.4);
  position: relative;
}
.placeholder-video .play-icon {
  position: absolute;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 12px 0 12px 20px;
  border-color: transparent transparent transparent rgba(255, 255, 255, 0.8);
  margin-left: 4px;
}

/* --- SCROLL ANIMATIONS --- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.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; }

/* --- BACKGROUND TEXTURE --- */
.bg-textured {
  position: relative;
}
.bg-textured::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(0,0,0,0.03) 1px, transparent 0);
  background-size: 24px 24px;
  pointer-events: none;
}

/* --- PAGE OFFSET FOR FIXED NAV --- */
main {
  padding-top: 72px;
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
  :root {
    --text-6xl: 2.8rem;
    --text-5xl: 2.2rem;
    --text-4xl: 1.8rem;
    --text-3xl: 1.5rem;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-bg-dim);
    padding: var(--space-4);
    gap: var(--space-1);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .nav-cta { margin-left: 0; width: 100%; }
  .nav-cta .btn { width: 100%; justify-content: center; }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }

  .container { padding: 0 var(--space-4); }
}