/* ============================================================
   CASTSYSTEM — Promotional Landing Page
   Design: Apple-inspired — pure white, generous space, SF Pro
   ============================================================ */

/* ── Variables ──────────────────────────────────────────── */
:root {
  --bg:          #ffffff;
  --bg-alt:      #f5f5f7;
  --bg-card:     #ffffff;
  --text:        #1d1d1f;
  --muted:       #6e6e73;
  --subtle:      #86868b;
  --primary:     #0d9488;
  --primary-dim: rgba(13,148,136,.08);
  --primary-mid: rgba(13,148,136,.18);
  --border:      rgba(0,0,0,.07);
  --shadow-sm:   0 2px 8px rgba(0,0,0,.06);
  --shadow-md:   0 12px 40px rgba(0,0,0,.1);
  --radius:      18px;
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:   -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
                 "Helvetica Neue", Helvetica, Arial, sans-serif;
}

/* ── Base ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  background-color: var(--bg);
}

body {
  margin: 0;
  width: 100%;
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}


/* ── Typography ─────────────────────────────────────────── */
.font-display { font-family: var(--font-display); }

.section-eyebrow {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
}

.section-title {
  font-family: var(--font-body);
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.028em;
  color: var(--text);
}

.section-title em {
  font-style: normal;
  color: var(--primary);
}

.feature-item {
  display: flex;
  gap: .75rem;
  align-items: flex-start;
  font-size: .9375rem;
  line-height: 1.65;
  color: var(--muted);
  font-family: var(--font-body);
}

.feature-item::before {
  content: '';
  flex-shrink: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--primary);
  margin-top: .6em;
}

/* ── Dividers ───────────────────────────────────────────── */
.gold-line {
  height: 1px;
  background: var(--border);
}

.gold-line-sm {
  width: 2rem;
  height: 2px;
  background: var(--primary);
  border-radius: 999px;
  margin: 1.25rem auto 0;
  opacity: 0.45;
}

/* ── Remove dark-mode decorative elements ───────────────── */
.glow-amber, .glow-teal, .hero-grid-bg { display: none; }

/* ── Hero ───────────────────────────────────────────────── */
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 10vw, 10.5rem);
  font-weight: 300;
  letter-spacing: .05em;
  line-height: 1;
  color: var(--text);
}

.hero-title span {
  color: var(--primary);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .4rem 1rem;
  border: 1px solid rgba(0,0,0,.12);
  border-radius: 999px;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  background: rgba(255,255,255,.8);
  backdrop-filter: blur(8px);
  font-family: var(--font-body);
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: .4; transform: scale(.75); }
}

/* ── Buttons ────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1.5rem;
  background: var(--primary);
  color: #fff;
  font-family: var(--font-body);
  font-size: .9375rem;
  font-weight: 400;
  border-radius: 980px;
  border: none;
  cursor: pointer;
  transition: background .2s;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary:hover {
  background: #0f766e;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: .375rem;
  padding: .75rem 1.5rem;
  background: transparent;
  color: var(--primary);
  font-family: var(--font-body);
  font-size: .9375rem;
  font-weight: 400;
  border-radius: 980px;
  border: 1px solid rgba(13,148,136,.28);
  cursor: pointer;
  transition: background .2s, border-color .2s;
  text-decoration: none;
  white-space: nowrap;
}

.btn-outline:hover {
  background: var(--primary-dim);
  border-color: rgba(13,148,136,.5);
}

/* ── Card ───────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid rgba(0,0,0,.06);
  border-radius: var(--radius);
  transition: box-shadow .3s cubic-bezier(.16,1,.3,1), transform .3s cubic-bezier(.16,1,.3,1);
}

/* Cards inside --bg-alt sections: no visible border, pure white */
.bg-alt .card {
  border-color: transparent;
  box-shadow: none;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: transparent;
}

.card-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 10px;
  background: var(--primary-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* ── Screenshot Frame ───────────────────────────────────── */
.screenshot-frame {
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-alt);
  box-shadow:
    0 0 0 1px rgba(0,0,0,.05),
    0 24px 64px rgba(0,0,0,.09);
}

.screenshot-chrome {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .625rem 1rem;
  background: #e8e8ea;
  border-bottom: 1px solid rgba(0,0,0,.07);
}

.screenshot-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.screenshot-chrome-title {
  flex: 1;
  font-size: 11px;
  color: #aaa;
  text-align: center;
  letter-spacing: .04em;
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.screenshot-placeholder {
  aspect-ratio: 16/10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 2rem;
  background: #f5f5f7;
  position: relative;
  overflow: hidden;
}

.screenshot-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,0,0,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,.025) 1px, transparent 1px);
  background-size: 24px 24px;
}

.screenshot-placeholder-icon {
  position: relative;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 12px;
  background: var(--primary-dim);
  border: 1px solid var(--primary-mid);
  display: flex;
  align-items: center;
  justify-content: center;
}

.screenshot-placeholder-label {
  position: relative;
  font-size: .6875rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: #aaa;
  text-align: center;
  font-family: var(--font-body);
}

.screenshot-placeholder-sublabel {
  position: relative;
  font-size: .625rem;
  color: #c8c8cd;
  text-align: center;
  font-family: 'SF Mono', 'Fira Code', monospace;
  letter-spacing: .04em;
}

.screenshot-frame img {
  display: block;
  width: 100%;
  height: auto;
}

/* ── Gallery grid ───────────────────────────────────────── */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

@media (min-width: 768px) {
  .gallery-grid { grid-template-columns: repeat(4, 1fr); }
}

.gallery-item {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-alt);
  cursor: pointer;
  transition: transform .25s cubic-bezier(.16,1,.3,1), box-shadow .25s;
}

.gallery-item:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-md);
}

.gallery-item-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: .625rem .75rem;
  background: linear-gradient(transparent, rgba(245,245,247,.96));
  font-size: 11px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--subtle);
  opacity: 0;
  transition: opacity .2s;
  font-family: var(--font-body);
}

.gallery-item:hover .gallery-item-label { opacity: 1; }

/* ── Feature info items ──────────────────────────────────── */
.flag-list { display: grid; gap: .75rem; }

.flag-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid rgba(0,0,0,.06);
  border-radius: 12px;
  gap: 1rem;
}

/* ── Contact form ────────────────────────────────────────── */
.form-group label {
  display: block;
  font-family: var(--font-body);
  font-size: .8125rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: .5rem;
}

.form-group label .required {
  color: var(--primary);
  margin-left: .25rem;
  font-size: .625rem;
  letter-spacing: .1em;
  vertical-align: middle;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: .8125rem 1rem;
  background: #f5f5f7;
  border: none;
  border-radius: 10px;
  color: var(--text);
  font-size: .9375rem;
  font-family: var(--font-body);
  transition: background .2s, box-shadow .2s;
  outline: none;
}

.form-input:focus,
.form-textarea:focus {
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(13,148,136,.2), 0 0 0 1px rgba(13,148,136,.4);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: #b8b8be;
}

.form-textarea {
  resize: vertical;
  min-height: 7rem;
}

/* ── Lightbox ───────────────────────────────────────────── */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,.65);
  backdrop-filter: saturate(180%) blur(24px);
  -webkit-backdrop-filter: saturate(180%) blur(24px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.lightbox-inner {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 40px 100px rgba(0,0,0,.5);
}

.lightbox-inner img {
  max-width: 100%;
  max-height: 90vh;
  display: block;
}

/* ── Scroll reveal ───────────────────────────────────────── */
.reveal {
  opacity: 1;
  transform: translateY(0);
  transition: opacity .7s cubic-bezier(.16,1,.3,1), transform .7s cubic-bezier(.16,1,.3,1);
}

.reveal.will-animate {
  opacity: 0;
  transform: translateY(1.5rem);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }
.reveal-delay-4 { transition-delay: .4s; }

/* ── Nav ────────────────────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  transition: background .3s, backdrop-filter .3s;
}

/* Apple's exact frosted glass formula */
.site-nav.scrolled {
  background: rgba(255,255,255,.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0,0,0,.08);
}

.nav-link {
  font-family: var(--font-body);
  font-size: .8125rem;
  letter-spacing: .01em;
  color: var(--muted);
  text-decoration: none;
  transition: color .2s;
}

.nav-link:hover { color: var(--text); }

/* ── Number decoration ───────────────────────────────────── */
.section-number {
  font-family: var(--font-display);
  font-size: 8rem;
  font-weight: 300;
  line-height: 1;
  color: rgba(0,0,0,.04);
  letter-spacing: -.02em;
  pointer-events: none;
  user-select: none;
  position: absolute;
}

/* ── Stats bar ───────────────────────────────────────────── */
.stat-item {
  text-align: center;
  padding: 2.25rem 1.5rem;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 300;
  letter-spacing: -.02em;
  color: var(--text);
  line-height: 1;
}

.stat-number span {
  color: var(--primary);
  font-size: 2rem;
}

.stat-label {
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--subtle);
  margin-top: .5rem;
}

/* ── Scroll indicator ────────────────────────────────────── */
.scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  color: var(--subtle);
  font-size: 10px;
  letter-spacing: .25em;
  text-transform: uppercase;
  font-family: var(--font-body);
}

.scroll-mouse {
  width: 22px;
  height: 34px;
  border: 1.5px solid rgba(0,0,0,.18);
  border-radius: 999px;
  position: relative;
}

.scroll-mouse::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 6px;
  transform: translateX(-50%);
  width: 3px;
  height: 6px;
  background: var(--primary);
  border-radius: 999px;
  animation: scroll-wheel 1.8s ease infinite;
}

@keyframes scroll-wheel {
  0%   { opacity: 1; top: 6px; }
  80%  { opacity: 0; top: 16px; }
  100% { opacity: 0; top: 6px; }
}

/* ── Hero fallback height ─────────────────────────────────── */
#hero-section {
  min-height: 100vh;
  background: linear-gradient(180deg, #f5f5f7 0%, #ffffff 55%);
}

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .section-number { font-size: 4rem; }
  .hero-title { letter-spacing: .05em; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}