/* =====================================================================
   EDISON ROBOTICS CENTRE — DESIGN SYSTEM
   Premium tech-company visual language. Red / White / Black only.
   Headings: Space Grotesk · Body: Inter
   ===================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  /* ---- brand ---- */
  --red:        #E4001C;
  --red-bright: #FF2440;
  --red-dark:   #A5001A;
  --red-darker: #6B0012;
  --red-glow:   rgba(228, 0, 28, 0.32);
  --red-subtle: rgba(228, 0, 28, 0.07);
  --red-line:   rgba(228, 0, 28, 0.16);

  --black:      #08080A;
  --ink:        #101013;
  --charcoal:   #1B1B1F;
  --white:      #FFFFFF;

  /* ---- neutral scale (cool, Apple-esque) ---- */
  --gray-50:    #FAFAFB;
  --gray-100:   #F3F3F5;
  --gray-200:   #E7E7EA;
  --gray-300:   #D3D3D8;
  --gray-400:   #A6A6AE;
  --gray-500:   #7A7A83;
  --gray-600:   #55555C;
  --gray-700:   #3A3A3F;

  --text:       #121214;
  --text-muted: #63636B;
  --text-soft:  #8A8A92;

  /* ---- surface ---- */
  --surface:       var(--white);
  --surface-alt:   var(--gray-50);
  --surface-dark:  var(--black);

  /* ---- type ---- */
  --font-head: 'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* ---- spacing (4px base) ---- */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.5rem;
  --sp-6: 2rem;
  --sp-7: 3rem;
  --sp-8: 4rem;
  --sp-9: 6rem;
  --sp-10: 8rem;

  /* ---- radius ---- */
  --r-sm: 10px;
  --r-md: 18px;
  --r-lg: 28px;
  --r-full: 999px;

  /* ---- shadow ---- */
  --shadow-sm: 0 2px 10px rgba(10, 10, 12, 0.06);
  --shadow-md: 0 16px 40px rgba(10, 10, 12, 0.10);
  --shadow-lg: 0 28px 70px rgba(10, 10, 12, 0.16);
  --shadow-red: 0 16px 36px var(--red-glow);

  /* ---- motion ---- */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast: 0.22s;
  --dur-med: 0.45s;
  --dur-slow: 0.9s;

  --container: 1240px;
  --container-narrow: 880px;
}

/* ================= RESET ================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

body {
  font-family: var(--font-body);
  background: var(--surface);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, video { max-width: 100%; display: block; }
a { color: inherit; }
ul { list-style: none; }
button { font: inherit; cursor: pointer; }
input, textarea, select { font: inherit; }

h1, h2, h3, h4, h5 {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.08;
  color: inherit;
}

::selection { background: var(--red); color: var(--white); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--gray-100); }
::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: var(--red); }

/* ================= LAYOUT ================= */
.container { width: 91%; max-width: var(--container); margin: 0 auto; }
.container-narrow { width: 91%; max-width: var(--container-narrow); margin: 0 auto; }
.section { padding: var(--sp-9) 0; }
.section-tight { padding: var(--sp-8) 0; }

@media (max-width: 720px) {
  .section { padding: var(--sp-8) 0; }
  .section-tight { padding: var(--sp-7) 0; }
}

/* ================= TYPOGRAPHY UTILITIES ================= */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--red);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--red);
  flex-shrink: 0;
}
.eyebrow.on-dark { color: var(--red-bright); }

.section-head {
  max-width: 640px;
  margin: 0 0 var(--sp-7);
}
.section-head.centered { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 {
  margin-top: 0.9rem;
  font-size: clamp(1.9rem, 3.6vw, 3rem);
}
.section-head p {
  margin-top: 1rem;
  color: var(--text-muted);
  font-size: 1.02rem;
  line-height: 1.75;
}

.text-muted { color: var(--text-muted); }

/* ================= BUTTONS ================= */
.btn {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.1px;
  padding: 15px 30px;
  border-radius: var(--r-full);
  text-decoration: none;
  border: 1.5px solid transparent;
  transition: transform var(--dur-fast) var(--ease-soft), box-shadow var(--dur-fast) var(--ease-soft), background var(--dur-fast) var(--ease-soft), border-color var(--dur-fast) var(--ease-soft), color var(--dur-fast) var(--ease-soft);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px) scale(0.98); }

.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(circle, rgba(255,255,255,0.55) 0%, transparent 60%);
  opacity: 0;
  transform: scale(0.4);
  transition: opacity 0.5s ease, transform 0.5s ease;
  pointer-events: none;
}
.btn:active::after { opacity: 1; transform: scale(1.6); transition: 0s; }

.btn-primary {
  background: var(--red);
  color: var(--white);
  box-shadow: var(--shadow-red);
}
.btn-primary:hover { background: var(--red-dark); transform: translateY(-3px); box-shadow: 0 20px 44px var(--red-glow); }

.btn-dark {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}
.btn-dark:hover { background: var(--charcoal); transform: translateY(-3px); box-shadow: var(--shadow-lg); }

.btn-ghost {
  background: rgba(255,255,255,0.06);
  color: var(--white);
  border-color: rgba(255,255,255,0.32);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: rgba(255,255,255,0.14); border-color: rgba(255,255,255,0.55); transform: translateY(-3px); }

.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: var(--gray-300);
}
.btn-outline:hover { border-color: var(--red); color: var(--red); transform: translateY(-3px); }

.btn-sm { padding: 10px 22px; font-size: 0.84rem; }
.btn-block { width: 100%; }

/* ================= NAVBAR ================= */
.site-header {
  position: fixed;
  top: var(--sp-4);
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  transition: top var(--dur-med) var(--ease);
  pointer-events: none;
}

.nav-container {
  pointer-events: auto;
  width: 94%;
  max-width: 1180px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: 8px 8px 8px 20px;
  border-radius: var(--r-full);
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: 0 8px 30px rgba(10, 10, 12, 0.07);
  backdrop-filter: blur(22px) saturate(170%);
  -webkit-backdrop-filter: blur(22px) saturate(170%);
  transition: background var(--dur-med) var(--ease), box-shadow var(--dur-med) var(--ease), padding var(--dur-med) var(--ease), backdrop-filter var(--dur-med) var(--ease);
}

.site-header.scrolled .nav-container {
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 0 12px 36px rgba(10, 10, 12, 0.12);
  padding: 6px 6px 6px 16px;
  backdrop-filter: blur(26px) saturate(180%);
  -webkit-backdrop-filter: blur(26px) saturate(180%);
}

.site-header.nav-hidden { top: -110px; }

.nav-brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  min-width: 0;
}

.nav-logo img {
  height: 40px;
  width: auto;
  object-fit: contain;
  transition: height var(--dur-med) var(--ease);
}
.site-header.scrolled .nav-logo img { height: 33px; }

.nav-brand-text { line-height: 1.15; min-width: 0; }
.nav-brand-text .name {
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--text);
  white-space: nowrap;
}
.nav-brand-text .tag {
  display: block;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--red);
  white-space: nowrap;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-menu a:not(.nav-btn) {
  position: relative;
  display: inline-block;
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 10px 18px;
  border-radius: var(--r-full);
  transition: color var(--dur-fast), background var(--dur-fast);
}
.nav-menu a:not(.nav-btn)::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 6px;
  height: 2px;
  border-radius: 2px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--dur-fast) var(--ease-soft);
}
.nav-menu a:not(.nav-btn):hover { color: var(--red); background: var(--red-subtle); }
.nav-menu a:not(.nav-btn):hover::after { transform: scaleX(1); }
.nav-menu a.active-link { color: var(--red); background: var(--red-subtle); font-weight: 600; }
.nav-menu a.active-link::after { transform: scaleX(1); }

.nav-btn {
  background: var(--red) !important;
  color: var(--white) !important;
  text-decoration: none;
  padding: 11px 24px !important;
  border-radius: var(--r-full) !important;
  font-weight: 600 !important;
  font-family: var(--font-head);
  font-size: 0.88rem;
  letter-spacing: 0.2px;
  margin-left: 6px;
  box-shadow: 0 8px 22px var(--red-glow);
  transition: background var(--dur-fast), transform var(--dur-fast), box-shadow var(--dur-fast);
}
.nav-btn:hover { background: var(--red-dark) !important; transform: translateY(-2px); box-shadow: 0 12px 28px var(--red-glow); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--gray-100);
  flex-shrink: 0;
}
.nav-toggle span { display: block; width: 18px; height: 2px; margin: 0 auto; background: var(--text); border-radius: 2px; transition: all 0.3s ease; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 980px) {
  .nav-menu { display: none; }
  .nav-toggle { display: flex; }
  .nav-container.menu-open {
    border-radius: 26px;
    align-items: flex-start;
    flex-wrap: wrap;
  }
  .nav-menu.open {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 2px;
    padding: 10px 6px 6px;
    border-top: 1px solid var(--gray-200);
    margin-top: 10px;
  }
  .nav-menu.open a:not(.nav-btn) { padding: 12px 16px; }
  .nav-menu.open .nav-btn { margin: 6px 6px 0; text-align: center; }
}

@media (max-width: 560px) {
  .nav-brand-text .tag { display: none; }
  .site-header { top: 10px; }
}

/* ================= REVEAL ON SCROLL ================= */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-left { opacity: 0; transform: translateX(-34px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal-left.visible { opacity: 1; transform: translateX(0); }
.reveal-right { opacity: 0; transform: translateX(34px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal-right.visible { opacity: 1; transform: translateX(0); }
.reveal-scale { opacity: 0; transform: scale(0.94); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal-scale.visible { opacity: 1; transform: scale(1); }
.d1 { transition-delay: 0.08s; } .d2 { transition-delay: 0.16s; } .d3 { transition-delay: 0.24s; }
.d4 { transition-delay: 0.32s; } .d5 { transition-delay: 0.4s; } .d6 { transition-delay: 0.48s; }

/* ================= HOME HERO ================= */
/* Immersive full-bleed video hero — the video is the background of the
   whole section (not a separate card), with the wording sitting directly
   on top over a dark scrim so video and text read as one merged visual. */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  color: var(--white);
  overflow: hidden;
  background: var(--black);
}

.hero-media { position: absolute; inset: 0; z-index: 0; }
.hero-media video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* dark vertical scrim (readability) + a soft diagonal red bleed on the
   right so the video keeps its own color without a hard edge/border */
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(8,8,10,0.58) 0%, rgba(8,8,10,0.38) 38%, rgba(8,8,10,0.88) 100%),
    linear-gradient(100deg, rgba(8,8,10,0.6) 0%, transparent 58%, rgba(228,0,28,0.16) 100%);
}

.hero-grid-fx {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 28% 32%, rgba(0,0,0,0.9), transparent 70%);
  opacity: 0.7;
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: 91%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 100px 0 60px;
}

/* ---- left column (sits directly on the video, so a glass treatment
   instead of the flat light-background styling used elsewhere) ---- */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px 8px 10px;
  border-radius: var(--r-full);
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.2);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-size: 0.8rem;
  font-weight: 700;
  color: rgba(255,255,255,0.92);
  margin-bottom: var(--sp-6);
}
.hero-badge .dot-live {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--red-bright);
  box-shadow: 0 0 8px var(--red-bright);
  flex-shrink: 0;
  animation: pulse-dot 1.8s ease-in-out infinite;
}

.hero-copy h1 {
  font-size: clamp(2.3rem, 3.7vw, 3.4rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  max-width: 21ch;
  text-wrap: balance;
  color: var(--white);
  text-shadow: 0 10px 40px rgba(0,0,0,0.3);
}
.hero-copy h1 .accent { color: var(--red-bright); }

.hero-lead {
  margin-top: var(--sp-5);
  max-width: 54ch;
  font-size: 1.04rem;
  line-height: 1.75;
  color: rgba(255,255,255,0.78);
}

.hero-cta-row {
  margin-top: var(--sp-6);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-hero-primary,
.btn-hero-secondary {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.96rem;
  padding: 16px 28px 16px 32px;
  border-radius: var(--r-full);
  text-decoration: none;
  border: 1.5px solid transparent;
  transition: transform var(--dur-fast) var(--ease-soft), box-shadow var(--dur-fast) var(--ease-soft), background var(--dur-fast) var(--ease-soft), color var(--dur-fast) var(--ease-soft), border-color var(--dur-fast) var(--ease-soft);
}
.btn-hero-primary:focus-visible, .btn-hero-secondary:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; }
.btn-hero-primary .btn-label, .btn-hero-secondary .btn-label,
.btn-hero-primary .btn-arrow, .btn-hero-secondary .btn-arrow { position: relative; z-index: 1; }
.btn-arrow { width: 17px; height: 17px; flex-shrink: 0; transition: transform var(--dur-fast) var(--ease-soft); }
.btn-hero-primary:hover .btn-arrow, .btn-hero-secondary:hover .btn-arrow { transform: translateX(4px); }

.btn-hero-primary {
  background: linear-gradient(135deg, var(--red-bright) 0%, var(--red) 55%, var(--red-dark) 100%);
  color: var(--white);
  box-shadow: 0 14px 32px var(--red-glow);
}
.btn-hero-primary:hover { transform: translateY(-3px) scale(1.02); box-shadow: 0 20px 44px var(--red-glow); }
.btn-hero-primary .btn-shine {
  position: absolute;
  top: 0; left: -60%;
  width: 40%; height: 100%;
  background: linear-gradient(115deg, transparent, rgba(255,255,255,0.55), transparent);
  transform: skewX(-20deg);
  animation: btnShineSweep 3.4s ease-in-out infinite;
  z-index: 0;
}
@keyframes btnShineSweep {
  0%, 30% { left: -60%; }
  70%, 100% { left: 130%; }
}

.btn-hero-secondary {
  background: var(--white);
  border-color: var(--red);
  color: var(--red);
}
.btn-hero-secondary .btn-fill {
  position: absolute;
  inset: 0;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease-soft);
  z-index: 0;
}
.btn-hero-secondary:hover .btn-fill { transform: scaleX(1); }
.btn-hero-secondary:hover { color: var(--white); transform: translateY(-3px) scale(1.02); box-shadow: 0 14px 32px var(--red-glow); }

.hero-stats-panel {
  margin-top: var(--sp-7);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  max-width: 580px;
  padding: 1.3rem 0.4rem;
  border-radius: var(--r-lg);
  background: rgba(255,255,255,0.62);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid rgba(255,255,255,0.75);
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255,255,255,0.6);
}
.hero-stat {
  position: relative;
  text-align: center;
  padding: 0 0.4rem;
  transition: transform var(--dur-fast) var(--ease-soft);
}
.hero-stat:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0; top: 12%; bottom: 12%;
  width: 1px;
  background: var(--gray-200);
}
.hero-stat:hover { transform: translateY(-3px); }
.hero-stat-num {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.4rem, 2.4vw, 1.8rem);
  color: var(--text);
  display: inline-flex;
  align-items: baseline;
  gap: 1px;
}
.hero-stat-num .suffix { color: var(--red); }
.hero-stat-label {
  margin-top: 4px;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.2px;
  color: var(--text-muted);
  line-height: 1.4;
}

.hero-scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 34px;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.6);
  font-size: 0.68rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.hero-scroll-cue .line { width: 1px; height: 34px; background: linear-gradient(rgba(255,255,255,0.9), transparent); animation: scrollcue 2s ease-in-out infinite; }
@keyframes scrollcue { 0% { transform: scaleY(0); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } 51% { transform-origin: bottom; } 100% { transform: scaleY(0); transform-origin: bottom; } }

@media (max-width: 980px) {
  .hero-inner { max-width: 760px; }
}

@media (max-width: 720px) {
  .hero { min-height: 92vh; }
  .hero-inner { padding: 88px 0 52px; }
  .hero-badge {
    font-size: 0.74rem;
    padding: 7px 16px 7px 10px;
    white-space: normal;
    line-height: 1.4;
  }
  .hero-copy h1 { font-size: 1.95rem; line-height: 1.18; letter-spacing: -0.005em; }
  .hero-lead { font-size: 0.96rem; line-height: 1.7; margin-top: var(--sp-4); }
  .hero-cta-row { margin-top: var(--sp-5); gap: 10px; }
  .hero-cta-row .btn-hero-primary, .hero-cta-row .btn-hero-secondary { flex: 1 1 auto; justify-content: center; padding-left: 24px; padding-right: 20px; }
  .hero-stats-panel { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sp-5) 0; margin-top: var(--sp-6); padding: 1.1rem 0.4rem; }
  .hero-stat:nth-child(2)::after { display: none; }
}

@media (max-width: 480px) {
  .hero-inner { padding-top: 78px; padding-bottom: 40px; }
  .hero-badge { font-size: 0.66rem; padding: 6px 14px 6px 9px; gap: 7px; margin-bottom: var(--sp-4); }
  .hero-badge .dot-live { width: 6px; height: 6px; }
  .hero-copy h1 { font-size: 1.5rem; line-height: 1.22; }
  .hero-lead { font-size: 0.88rem; line-height: 1.6; margin-top: var(--sp-3); max-width: 34ch; }
  .hero-cta-row { flex-direction: column; margin-top: var(--sp-4); }
  .hero-cta-row .btn-hero-primary, .hero-cta-row .btn-hero-secondary { width: 100%; padding-top: 14px; padding-bottom: 14px; }
  .hero-stats-panel { margin-top: var(--sp-5); }
  .hero-stat-num { font-size: 1.25rem; }
  .hero-stat-label { font-size: 0.6rem; }
}

/* ================= INNER PAGE HERO ================= */
.page-hero {
  position: relative;
  overflow: hidden;
  min-height: 54vh;
  display: flex;
  align-items: flex-end;
  color: var(--white);
  background: var(--black);
  padding-top: 120px;
}
.page-hero .ph-bg {
  position: absolute; inset: -20px;
  background-size: cover;
  background-position: center;
  filter: brightness(0.5) saturate(1.05);
  transform: scale(1.06);
}
.page-hero .ph-overlay {
  position: absolute; inset: 0;
  background:
    linear-gradient(160deg, rgba(8,8,10,0.92) 0%, rgba(107,0,18,0.55) 55%, rgba(8,8,10,0.94) 100%),
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: auto, 46px 46px, 46px 46px;
}
.page-hero::after {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, transparent, var(--red-bright), transparent);
  z-index: 2;
}
.ph-inner { position: relative; z-index: 1; width: 91%; max-width: var(--container); margin: 0 auto; padding: var(--sp-7) 0 var(--sp-8); }
.ph-crumb { display: inline-flex; align-items: center; gap: 8px; font-size: 0.8rem; color: rgba(255,255,255,0.55); margin-bottom: var(--sp-4); }
.ph-crumb a { color: rgba(255,255,255,0.85); text-decoration: none; }
.ph-crumb a:hover { color: var(--red-bright); }
.ph-crumb .current { color: var(--red-bright); }
.page-hero h1 { font-size: clamp(2.4rem, 5.6vw, 4.4rem); max-width: 16ch; }
.page-hero h1 .accent { color: var(--red-bright); }
.page-hero p { max-width: 580px; margin-top: var(--sp-4); color: rgba(255,255,255,0.78); font-size: 1rem; line-height: 1.8; }

.ph-badge {
  display: inline-flex; align-items: center; gap: 9px;
  margin-top: var(--sp-5); padding: 8px 18px; border-radius: var(--r-full);
  background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2);
  backdrop-filter: blur(8px); font-size: 0.82rem; font-weight: 600;
}
.ph-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--red-bright); box-shadow: 0 0 10px var(--red-bright); animation: pulse-dot 1.8s ease-in-out infinite; }
@keyframes pulse-dot { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.5; transform: scale(1.35); } }

@media (max-width: 640px) { .page-hero { padding-top: 100px; min-height: 46vh; } }

/* ================= FEATURE / WHY CARDS ================= */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
}
.feature-card {
  position: relative;
  padding: var(--sp-6) var(--sp-5);
  background: var(--surface);
  border: 1px solid var(--gray-200);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: transform var(--dur-med) var(--ease), box-shadow var(--dur-med) var(--ease), border-color var(--dur-med) var(--ease);
}
.feature-card::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(150deg, var(--red-subtle), transparent 55%);
  opacity: 0;
  transition: opacity var(--dur-med);
}
.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--red-line);
}
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  position: relative;
  width: 54px; height: 54px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 16px;
  background: var(--ink);
  color: var(--white);
  margin-bottom: var(--sp-5);
  transition: background var(--dur-med), transform var(--dur-med);
}
.feature-card:hover .feature-icon { background: var(--red); transform: rotate(-6deg) scale(1.06); }
.feature-icon svg { width: 26px; height: 26px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.feature-card h3 { position: relative; font-size: 1.14rem; margin-bottom: 10px; }
.feature-card p { position: relative; color: var(--text-muted); font-size: 0.94rem; line-height: 1.7; }

@media (max-width: 980px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .feature-grid { grid-template-columns: 1fr; } }

/* ================= COURSE CARDS ================= */
.course-grid-premium {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--sp-5);
}
.course-card-p {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  transition: transform var(--dur-med) var(--ease), box-shadow var(--dur-med) var(--ease);
}
.course-card-p:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.course-media { position: relative; aspect-ratio: 4/3; overflow: hidden; background: var(--gray-100); }
.course-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.7s var(--ease); }
.course-card-p:hover .course-media img { transform: scale(1.08); }
.course-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(8,8,10,0.55), transparent 55%); }
.course-age-badge {
  position: absolute; top: 14px; left: 14px; z-index: 1;
  padding: 6px 14px; border-radius: var(--r-full);
  background: rgba(255,255,255,0.16); border: 1px solid rgba(255,255,255,0.3);
  backdrop-filter: blur(8px); color: var(--white); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.4px;
}
.course-cat {
  position: absolute; bottom: 12px; left: 14px; z-index: 1;
  color: var(--white); font-size: 0.72rem; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; opacity: 0.9;
}
.course-body { padding: var(--sp-5); display: flex; flex-direction: column; gap: 10px; flex: 1; }
.course-body h3 { font-size: 1.18rem; }
.course-body p { color: var(--text-muted); font-size: 0.92rem; line-height: 1.68; flex: 1; }
.course-link {
  margin-top: 6px;
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--red); font-family: var(--font-head); font-weight: 600; font-size: 0.9rem;
  transition: gap var(--dur-fast);
}
.course-card-p:hover .course-link { gap: 13px; }

/* ================= STATS ================= */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--black);
  color: var(--white);
}
.stat-cell {
  padding: var(--sp-7) var(--sp-4);
  text-align: center;
  border-right: 1px solid rgba(255,255,255,0.1);
  position: relative;
}
.stat-cell:last-child { border-right: none; }
.stat-num {
  font-family: var(--font-head);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 700;
  color: var(--white);
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
}
.stat-num .suffix { color: var(--red-bright); }
.stat-label { margin-top: 8px; font-size: 0.8rem; color: rgba(255,255,255,0.6); letter-spacing: 0.5px; }

@media (max-width: 720px) { .stats-strip { grid-template-columns: repeat(2, 1fr); } .stat-cell { border-bottom: 1px solid rgba(255,255,255,0.1); } }

/* light variant used inline in editorial pages */
.stats-strip.light { background: var(--white); color: var(--text); border: 1px solid var(--gray-200); box-shadow: var(--shadow-sm); }
.stats-strip.light .stat-cell { border-right-color: var(--gray-200); }
.stats-strip.light .stat-num { color: var(--red); }
.stats-strip.light .stat-num .suffix { color: var(--text); }
.stats-strip.light .stat-label { color: var(--text-muted); }

/* ================= GALLERY (masonry + filter + lightbox) ================= */
.gallery-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: var(--sp-6);
}
.gfilter {
  padding: 10px 20px;
  border-radius: var(--r-full);
  border: 1.5px solid var(--gray-200);
  background: var(--surface);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: all var(--dur-fast);
}
.gfilter:hover { border-color: var(--red); color: var(--red); }
.gfilter.active { background: var(--red); border-color: var(--red); color: var(--white); box-shadow: var(--shadow-red); }

.masonry {
  columns: 4 240px;
  column-gap: var(--sp-4);
}
@media (max-width: 1100px) { .masonry { columns: 3 220px; } }
@media (max-width: 720px) { .masonry { columns: 2 160px; } }
@media (max-width: 440px) { .masonry { columns: 1; } }

.g-tile {
  position: relative;
  break-inside: avoid;
  margin-bottom: var(--sp-4);
  border-radius: var(--r-md);
  overflow: hidden;
  cursor: zoom-in;
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-med) var(--ease), box-shadow var(--dur-med) var(--ease), opacity 0.4s ease;
  background: var(--gray-100);
}
.g-tile img, .g-tile video { width: 100%; display: block; transition: transform 0.6s var(--ease); }
.g-tile:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.g-tile:hover img, .g-tile:hover video { transform: scale(1.05); }
.g-tile.hidden-item { display: none; }
.g-tile .g-tag {
  position: absolute; bottom: 10px; left: 10px;
  padding: 5px 12px; border-radius: var(--r-full);
  background: rgba(8,8,10,0.55); backdrop-filter: blur(6px);
  color: var(--white); font-size: 0.66rem; font-weight: 700; letter-spacing: 1.2px; text-transform: uppercase;
}
.g-tile .g-play {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  background: rgba(8,8,10,0.25);
}
.g-play svg { width: 54px; height: 54px; color: var(--white); filter: drop-shadow(0 6px 18px rgba(0,0,0,0.5)); }

.lightbox-overlay {
  display: none;
  position: fixed; inset: 0; z-index: 9999;
  background: rgba(6,6,8,0.95);
  align-items: center; justify-content: center;
  padding: 4vh 4vw;
  cursor: zoom-out;
}
.lightbox-overlay.open { display: flex; }
.lightbox-overlay img, .lightbox-overlay video {
  max-width: 92vw; max-height: 88vh; object-fit: contain;
  border-radius: 10px; box-shadow: 0 30px 90px rgba(0,0,0,0.7);
  cursor: default; animation: lbIn 0.3s var(--ease);
}
@keyframes lbIn { from { opacity: 0; transform: scale(0.94); } to { opacity: 1; transform: scale(1); } }
.lightbox-close {
  position: fixed; top: 22px; right: 26px; z-index: 10000;
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.2);
  color: var(--white); font-size: 1.4rem; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.2s;
}
.lightbox-close:hover { background: var(--red); }

/* ================= TESTIMONIALS ================= */
.testi-wrap { position: relative; max-width: 820px; margin: 0 auto; }
.testi-track { position: relative; min-height: 280px; }
.testi-slide {
  position: absolute; inset: 0;
  opacity: 0; visibility: hidden; transform: translateY(14px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease), visibility 0.6s;
  text-align: center;
}
.testi-slide.active { opacity: 1; visibility: visible; transform: translateY(0); position: relative; }
.testi-stars { display: flex; justify-content: center; gap: 4px; color: var(--red); margin-bottom: var(--sp-5); }
.testi-stars svg { width: 18px; height: 18px; fill: currentColor; }
.testi-quote { font-family: var(--font-head); font-size: clamp(1.15rem, 2.2vw, 1.55rem); font-weight: 600; line-height: 1.5; color: var(--text); margin-bottom: var(--sp-5); }
.testi-person { display: flex; align-items: center; justify-content: center; gap: 12px; }
.testi-avatar {
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--ink); color: var(--white);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head); font-weight: 700; font-size: 0.95rem;
}
.testi-meta { text-align: left; }
.testi-meta .name { font-weight: 700; font-size: 0.94rem; }
.testi-meta .role { font-size: 0.82rem; color: var(--text-muted); }

.testi-controls { display: flex; justify-content: center; gap: 10px; margin-top: var(--sp-6); }
.testi-dot { width: 8px; height: 8px; border-radius: 50%; border: none; background: var(--gray-300); transition: all var(--dur-fast); }
.testi-dot.active { background: var(--red); width: 26px; border-radius: 999px; }

/* ================= PARTNERS ================= */
.partners-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--sp-7);
  padding: var(--sp-6) 0;
}
.partner-item {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-soft);
  letter-spacing: 0.2px;
  text-align: center;
  transition: color var(--dur-fast), transform var(--dur-fast);
  opacity: 0.75;
}
.partner-item:hover { color: var(--text); opacity: 1; transform: translateY(-2px); }

/* ================= TIMELINE ================= */
.timeline { position: relative; max-width: 880px; margin: 0 auto; }
.timeline::before {
  content: "";
  position: absolute; left: 20px; top: 6px; bottom: 6px; width: 2px;
  background: linear-gradient(var(--red), var(--gray-200));
}
.tl-item { position: relative; padding-left: 60px; margin-bottom: var(--sp-7); }
.tl-item:last-child { margin-bottom: 0; }
.tl-dot {
  position: absolute; left: 10px; top: 2px;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--white); border: 3px solid var(--red);
  box-shadow: 0 0 0 5px var(--surface-alt);
}
.tl-year { font-family: var(--font-head); font-weight: 700; color: var(--red); font-size: 0.85rem; letter-spacing: 1px; margin-bottom: 4px; }
.tl-item h3 { font-size: 1.14rem; margin-bottom: 6px; }
.tl-item p { color: var(--text-muted); font-size: 0.94rem; line-height: 1.7; max-width: 620px; }

/* ================= CTA BANNER ================= */
.cta-banner {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, var(--black) 0%, var(--red-darker) 130%);
  padding: var(--sp-9) var(--sp-7);
  text-align: center;
  color: var(--white);
}
.cta-banner::before {
  content: "";
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 50% 20%, rgba(0,0,0,0.9), transparent 75%);
}
.cta-banner h2 { position: relative; font-size: clamp(1.9rem, 4vw, 3rem); max-width: 18ch; margin: 0 auto; }
.cta-banner p { position: relative; max-width: 520px; margin: var(--sp-4) auto var(--sp-6); color: rgba(255,255,255,0.75); font-size: 1.02rem; line-height: 1.7; }
.cta-actions { position: relative; display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }

@media (max-width: 640px) { .cta-banner { padding: var(--sp-8) var(--sp-5); } }

/* ================= CARD GRID (about / general) ================= */
.info-card {
  background: var(--surface);
  border: 1px solid var(--gray-200);
  border-radius: var(--r-md);
  padding: var(--sp-6);
  transition: transform var(--dur-med) var(--ease), box-shadow var(--dur-med) var(--ease);
}
.info-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.info-card h3 { font-size: 1.2rem; margin-bottom: 12px; color: var(--red); }
.info-card p, .info-card li { color: var(--text-muted); font-size: 0.96rem; line-height: 1.75; }
.info-card ul { padding-left: 0; margin-top: 10px; }
.info-card li { position: relative; padding-left: 22px; margin-bottom: 10px; }
.info-card li::before { content: ""; position: absolute; left: 0; top: 9px; width: 8px; height: 8px; border-radius: 2px; background: var(--red); }

/* ================= FOOTER ================= */
.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--black);
  color: rgba(255,255,255,0.68);
}
.site-footer::before {
  content: "";
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.6;
  pointer-events: none;
}

.footer-top {
  position: relative;
  width: 91%; max-width: var(--container); margin: 0 auto;
  padding: var(--sp-9) 0 var(--sp-7);
  display: grid;
  grid-template-columns: 1.5fr 0.9fr 0.9fr 1.1fr;
  gap: var(--sp-7);
}
.footer-brand img { width: 62px; margin-bottom: var(--sp-4); filter: drop-shadow(0 0 20px rgba(228,0,28,0.25)); }
.footer-brand h2 { color: var(--white); font-size: 1.3rem; margin-bottom: 8px; }
.footer-brand p { font-size: 0.92rem; line-height: 1.8; max-width: 320px; color: rgba(255,255,255,0.55); }
.footer-social { display: flex; gap: 10px; margin-top: var(--sp-5); }
.footer-social a {
  width: 40px; height: 40px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12);
  color: var(--white); transition: background var(--dur-fast), transform var(--dur-fast);
}
.footer-social a:hover { background: var(--red); transform: translateY(-3px); }
.footer-social svg { width: 17px; height: 17px; fill: currentColor; }

.footer-col h3 { color: var(--red-bright); font-size: 0.88rem; letter-spacing: 0.5px; margin-bottom: var(--sp-4); }
.footer-col a {
  display: block; text-decoration: none;
  color: rgba(255,255,255,0.62); font-size: 0.92rem;
  margin-bottom: 12px; transition: color var(--dur-fast), transform var(--dur-fast);
}
.footer-col a:hover { color: var(--white); transform: translateX(4px); }
.footer-col p { font-size: 0.92rem; line-height: 1.8; color: rgba(255,255,255,0.6); margin-bottom: 10px; }

.footer-newsletter {
  display: flex; gap: 8px; margin-top: var(--sp-4);
  flex-wrap: wrap;
}
.footer-newsletter input {
  flex: 1; min-width: 160px;
  padding: 12px 16px; border-radius: var(--r-full);
  border: 1px solid rgba(255,255,255,0.16);
  background: rgba(255,255,255,0.05); color: var(--white);
  font-size: 0.88rem; outline: none;
}
.footer-newsletter input::placeholder { color: rgba(255,255,255,0.4); }
.footer-newsletter input:focus { border-color: var(--red); }
.footer-newsletter button {
  padding: 12px 22px; border-radius: var(--r-full); border: none;
  background: var(--red); color: var(--white); font-family: var(--font-head); font-weight: 600; font-size: 0.86rem;
  transition: background var(--dur-fast), transform var(--dur-fast);
}
.footer-newsletter button:hover { background: var(--red-dark); transform: translateY(-2px); }

.footer-bottom {
  position: relative;
  width: 91%; max-width: var(--container); margin: 0 auto;
  padding: var(--sp-4) 0 var(--sp-6);
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4);
  font-size: 0.82rem; color: rgba(255,255,255,0.42); flex-wrap: wrap;
}
.footer-bottom a { color: rgba(255,255,255,0.6); text-decoration: none; }
.footer-bottom a:hover { color: var(--red-bright); }

@media (max-width: 980px) { .footer-top { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-top { grid-template-columns: 1fr; padding: var(--sp-8) 0 var(--sp-6); } }

/* ================= WHATSAPP FAB ================= */
.whatsapp-fab {
  position: fixed; bottom: 26px; right: 26px; z-index: 900;
  display: flex; align-items: center; gap: 10px;
  background: #25D366; color: white; text-decoration: none;
  padding: 14px 22px 14px 16px; border-radius: 50px;
  box-shadow: 0 10px 30px rgba(37,211,102,0.4);
  font-family: var(--font-head); font-size: 0.86rem; font-weight: 600;
  transition: transform var(--dur-fast) var(--ease-soft), box-shadow var(--dur-fast), background var(--dur-fast);
  animation: waPulse 2.6s ease-in-out infinite;
}
.whatsapp-fab:hover { background: #1ebe5d; transform: translateY(-4px) scale(1.04); box-shadow: 0 16px 36px rgba(37,211,102,0.5); animation: none; }
.whatsapp-fab svg { width: 24px; height: 24px; flex-shrink: 0; }
@keyframes waPulse { 0%,100% { box-shadow: 0 10px 30px rgba(37,211,102,0.4); } 50% { box-shadow: 0 10px 36px rgba(37,211,102,0.7), 0 0 0 9px rgba(37,211,102,0.12); } }

@media (max-width: 560px) {
  .whatsapp-fab { padding: 13px; border-radius: 50%; bottom: 18px; right: 16px; }
  .whatsapp-fab svg { width: 21px; height: 21px; }
  .whatsapp-fab .wa-label { display: none; }
}

/* ================= FORMS (contact) ================= */
.form-field { margin-bottom: var(--sp-4); }
.form-field label { display: block; font-size: 0.82rem; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.form-field input, .form-field textarea {
  width: 100%; padding: 14px 16px;
  border: 1.5px solid var(--gray-200); border-radius: var(--r-sm);
  background: var(--surface-alt); color: var(--text);
  font-size: 0.94rem; outline: none;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast), background var(--dur-fast);
}
.form-field textarea { resize: vertical; min-height: 120px; }
.form-field input:focus, .form-field textarea:focus { border-color: var(--red); box-shadow: 0 0 0 4px var(--red-subtle); background: var(--white); }

.contact-info-row { display: flex; align-items: flex-start; gap: 14px; margin-bottom: var(--sp-5); }
.contact-info-row .ci-icon {
  flex-shrink: 0; width: 44px; height: 44px; border-radius: 12px;
  background: var(--red-subtle); color: var(--red);
  display: flex; align-items: center; justify-content: center;
}
.contact-info-row .ci-icon svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.contact-info-row h4 { font-size: 0.94rem; margin-bottom: 4px; }
.contact-info-row p, .contact-info-row a { font-size: 0.92rem; color: var(--text-muted); text-decoration: none; line-height: 1.6; }
.contact-info-row a:hover { color: var(--red); }

.map-embed { border-radius: var(--r-md); overflow: hidden; border: 1px solid var(--gray-200); box-shadow: var(--shadow-sm); }
.map-embed iframe { width: 100%; height: 300px; border: none; display: block; }

/* ================= BADGE ================= */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 14px; border-radius: var(--r-full);
  background: var(--red-subtle); color: var(--red);
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.6px; text-transform: uppercase;
}

/* ================= UTILS ================= */
.split-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-7); align-items: center; }
@media (max-width: 860px) { .split-2 { grid-template-columns: 1fr; gap: var(--sp-6); } }
.bg-alt { background: var(--surface-alt); }
.bg-dark { background: var(--black); color: var(--white); }
.rounded-media { border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--shadow-lg); }

/* ================= SECTION BACKGROUND SYSTEM =================
   Extremely subtle (2-6% opacity) decorative textures applied to section
   wrappers via modifier classes, so page structure/content never changes —
   only what sits behind it. Rendered as a ::before layer under the content. */
[class*="bg-pattern-"] { position: relative; isolation: isolate; }
[class*="bg-pattern-"]::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

/* engineering grid */
.bg-pattern-grid::before {
  background-image: linear-gradient(rgba(16,16,19,0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(16,16,19,0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, rgba(0,0,0,0.9), transparent 78%);
}

/* engineering blueprint — fine + coarse grid layered */
.bg-pattern-blueprint::before {
  background-image:
    linear-gradient(rgba(16,16,19,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16,16,19,0.05) 1px, transparent 1px),
    linear-gradient(rgba(16,16,19,0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16,16,19,0.028) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
  mask-image: radial-gradient(ellipse 75% 65% at 50% 35%, rgba(0,0,0,0.88), transparent 80%);
}

/* tiny dotted matrix */
.bg-pattern-dots::before {
  background-image: radial-gradient(circle, rgba(16,16,19,0.06) 1px, transparent 1.4px);
  background-size: 20px 20px;
  mask-image: radial-gradient(ellipse 75% 65% at 50% 40%, rgba(0,0,0,0.85), transparent 80%);
}

/* circuit-trace lattice with faint node points */
.bg-pattern-circuit::before {
  background-image:
    repeating-linear-gradient(90deg, rgba(16,16,19,0.045) 0 1px, transparent 1px 90px),
    repeating-linear-gradient(0deg, rgba(16,16,19,0.045) 0 1px, transparent 1px 90px),
    radial-gradient(rgba(228,0,28,0.06) 1.6px, transparent 1.6px);
  background-size: 90px 90px, 90px 90px, 90px 90px;
  background-position: 0 0, 0 0, 45px 45px;
  mask-image: radial-gradient(ellipse 65% 60% at 80% 20%, rgba(0,0,0,0.85), transparent 75%);
}

/* diagonal technical crosshatch */
.bg-pattern-geo::before {
  background-image:
    repeating-linear-gradient(45deg, rgba(16,16,19,0.035) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(-45deg, rgba(16,16,19,0.035) 0 1px, transparent 1px 64px);
  mask-image: radial-gradient(ellipse 70% 65% at 50% 30%, rgba(0,0,0,0.85), transparent 78%);
}

/* soft large radial glow, no grid */
.bg-pattern-glow::before {
  background: radial-gradient(620px 440px at 85% 0%, rgba(228,0,28,0.055), transparent 65%),
              radial-gradient(520px 400px at 8% 100%, rgba(228,0,28,0.04), transparent 60%);
}

/* ================= DECORATIVE MOTIFS (sitewide) =================
   Large wireframe circle/square accents layered behind section content.
   Rendered via ::after on top of the ::before texture layer, so no extra
   markup is needed per page — one accent per section, alternated by
   shape / corner / size across the site for rhythm, while staying one
   consistent visual language (thin red-line border, same radii scale). */
[class*="deco-"] { position: relative; isolation: isolate; }
[class*="deco-"]::after {
  content: "";
  position: absolute;
  z-index: -1;
  border: 1px solid var(--red-line);
  pointer-events: none;
  animation: decoFloat 13s ease-in-out infinite;
}
.deco-square::after { border-radius: 22px; }
.deco-circle::after { border-radius: 50%; }
.deco-sm::after { width: 190px; height: 190px; }
.deco-md::after { width: 320px; height: 320px; }
.deco-lg::after { width: 460px; height: 460px; }
.deco-tr::after { top: -12%; right: -6%; }
.deco-tl::after { top: -12%; left: -6%; }
.deco-br::after { bottom: -14%; right: -6%; }
.deco-bl::after { bottom: -14%; left: -6%; }
.deco-delay-1::after { animation-delay: 1.5s; }
.deco-delay-2::after { animation-delay: 3s; }
@keyframes decoFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-18px) rotate(2deg); }
}

@media (max-width: 720px) {
  .deco-lg::after { width: 300px; height: 300px; }
  .deco-md::after { width: 220px; height: 220px; }
}

/* ================= COURSE DETAIL ================= */
.detail-hero { display: grid; grid-template-columns: minmax(300px, 480px) 1fr; gap: var(--sp-7); align-items: start; }
.detail-media { position: relative; aspect-ratio: 4/3; border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--shadow-lg); background: var(--gray-100); }
.detail-media img { width: 100%; height: 100%; object-fit: cover; }
.detail-panel h1 { font-size: clamp(2rem, 4vw, 2.9rem); margin: 12px 0 14px; }
.detail-panel .lead { color: var(--text-muted); font-size: 1.04rem; line-height: 1.8; max-width: 560px; }
.detail-info-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: var(--sp-6) 0; }
.detail-info-box { padding: 16px; background: var(--surface-alt); border-radius: var(--r-sm); border: 1px solid var(--gray-200); }
.detail-info-box h4 { font-size: 0.66rem; letter-spacing: 1.6px; text-transform: uppercase; color: var(--red); margin-bottom: 6px; }
.detail-info-box p { font-weight: 700; font-size: 0.96rem; }
.detail-syllabus { padding: var(--sp-5); background: var(--surface-alt); border-left: 4px solid var(--red); border-radius: var(--r-sm); margin-bottom: var(--sp-6); }
.detail-syllabus h4 { font-size: 0.72rem; letter-spacing: 1.6px; text-transform: uppercase; color: var(--red); margin-bottom: 10px; }
.detail-syllabus li { position: relative; padding-left: 20px; margin-bottom: 9px; color: var(--text-muted); font-size: 0.94rem; line-height: 1.6; }
.detail-syllabus li::before { content: ""; position: absolute; left: 0; top: 8px; width: 7px; height: 7px; border-radius: 2px; background: var(--red); }
.detail-actions { display: flex; gap: 12px; flex-wrap: wrap; }

@media (max-width: 860px) {
  .detail-hero { grid-template-columns: 1fr; }
  .detail-media { aspect-ratio: 16/9; }
}
@media (max-width: 560px) {
  .detail-info-grid { grid-template-columns: 1fr; }
  .detail-actions { flex-direction: column; }
  .detail-actions .btn { width: 100%; }
}