/* ═══════════════════════════════════════════════
   Reprosia — Design System
   reprosia.com
   ═══════════════════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ─── THEME TOKENS ─── */
:root {
  /* Dark (default) */
  --bg:           #03080f;
  --bg-alt:       #06101e;
  --surface:      #06101e;
  --surface-2:    #0a192e;
  --surface-3:    #0f223d;
  --border:       rgba(80,140,220,0.09);
  --border-mid:   rgba(80,140,220,0.18);
  --border-teal:  rgba(0,200,168,0.24);
  --text:         #dce9f8;
  --text-mid:     #7898b8;
  --text-soft:    #344d68;
  --text-inv:     #03080f;
  --teal:         #00c8a8;
  --teal-dim:     rgba(0,200,168,0.07);
  --teal-glow:    rgba(0,200,168,0.20);
  --blue:         #3d88f0;
  --blue-dim:     rgba(61,136,240,0.08);
  --shadow-sm:    0 2px 8px rgba(0,0,0,0.3);
  --shadow-md:    0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg:    0 24px 64px rgba(0,0,0,0.5);
  --nav-bg:       rgba(3,8,15,0.82);
  --p-r: 0; --p-g: 200; --p-b: 168; /* particle colour */
}

:root[data-theme="light"] {
  --bg:           #f4f7ff;
  --bg-alt:       #eaeffc;
  --surface:      #ffffff;
  --surface-2:    #f0f4ff;
  --surface-3:    #e5ecff;
  --border:       #dce4f2;
  --border-mid:   #c5d0eb;
  --border-teal:  rgba(0,152,124,0.28);
  --text:         #0a1628;
  --text-mid:     #2d4a6a;
  --text-soft:    #6a84a2;
  --text-inv:     #f4f7ff;
  --teal:         #00987c;
  --teal-dim:     rgba(0,152,124,0.07);
  --teal-glow:    rgba(0,152,124,0.16);
  --blue:         #2563eb;
  --blue-dim:     rgba(37,99,235,0.07);
  --shadow-sm:    0 2px 8px rgba(10,22,40,0.08);
  --shadow-md:    0 8px 32px rgba(10,22,40,0.10);
  --shadow-lg:    0 24px 64px rgba(10,22,40,0.12);
  --nav-bg:       rgba(244,247,255,0.90);
  --p-r: 0; --p-g: 152; --p-b: 124;
}

/* Smooth theme transition */
html { transition: none; }
body, body * {
  transition: background-color 0.3s ease,
              color 0.3s ease,
              border-color 0.3s ease,
              box-shadow 0.3s ease;
}
/* Don't transition transforms/opacity (breaks animations) */
.reveal, canvas { transition: none; }

/* ─── BASE ─── */
html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* ─── TYPOGRAPHY ─── */
.display {
  font-family: 'Cormorant Garamond', serif;
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--text);
}
.display em { font-style: italic; color: var(--teal); }
.display-xl { font-size: clamp(3rem, 6vw, 5.5rem); }
.display-lg { font-size: clamp(2.25rem, 4vw, 3.625rem); }
.display-md { font-size: clamp(1.75rem, 2.5vw, 2.75rem); }
.display-sm { font-size: clamp(1.375rem, 2vw, 1.875rem); }

.eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  color: var(--teal);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.eyebrow.ruled::before {
  content: '';
  display: block;
  width: 1.75rem; height: 1px;
  background: var(--teal);
  flex-shrink: 0;
}

/* ─── LAYOUT ─── */
.container { max-width: 1120px; margin: 0 auto; }

.section     { padding: 7rem 2.5rem; }
.section-sm  { padding: 5rem 2.5rem; }
.section-alt { background: var(--bg-alt); }
.section-surface { background: var(--surface); }

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.875rem;
  border-radius: 5px;
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: transform 0.2s ease, box-shadow 0.25s ease,
              background-color 0.2s, color 0.2s, border-color 0.2s;
  line-height: 1;
  text-decoration: none;
}
.btn:hover { transform: translateY(-2px); }

.btn-teal   { background: var(--teal); color: var(--text-inv); }
.btn-teal:hover { box-shadow: 0 10px 30px var(--teal-glow); }

.btn-ghost  { border: 1px solid var(--border-teal); color: var(--text); background: transparent; }
.btn-ghost:hover { border-color: var(--teal); color: var(--teal); }

.btn-outline { border: 1px solid var(--border-mid); color: var(--text-mid); background: transparent; }
.btn-outline:hover { border-color: var(--text); color: var(--text); }

.btn-sm { padding: 0.5rem 1.125rem; font-size: 0.8125rem; }

.btn-group { display: flex; gap: 0.875rem; flex-wrap: wrap; }

/* ─── BADGES / TAGS ─── */
.tag {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.64rem;
  color: var(--teal);
  border: 1px solid var(--border-teal);
  padding: 0.2rem 0.625rem;
  border-radius: 3px;
  letter-spacing: 0.08em;
}

.badge {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.64rem;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.6rem;
  border-radius: 3px;
}
.badge-teal { background: var(--teal-dim); color: var(--teal); border: 1px solid var(--border-teal); }
.badge-blue { background: var(--blue-dim); color: var(--blue); border: 1px solid rgba(61,136,240,0.25); }

/* ─── NAVIGATION ─── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  height: 64px;
  padding: 0 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}
.nav.scrolled { border-bottom-color: var(--border-mid); }

.nav-logo {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.45rem;
  font-weight: 400;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.01em;
  flex-shrink: 0;
}
.nav-logo span { color: var(--teal); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  flex: 1;
  justify-content: center;
}
.nav-links a {
  color: var(--text-mid);
  text-decoration: none;
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  transition: color 0.2s;
  position: relative;
  padding-bottom: 2px;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active {
  color: var(--text);
}
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 1px;
  background: var(--teal);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--border-mid);
  border-radius: 4px;
  width: 36px; height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-mid);
  flex-shrink: 0;
  transition: border-color 0.2s, color 0.2s, transform 0.3s !important;
}
.theme-toggle:hover {
  border-color: var(--teal);
  color: var(--teal);
  transform: rotate(22deg);
}
.theme-toggle svg { width: 15px; height: 15px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* Icon visibility by theme */
.icon-moon { display: none; }
.icon-sun  { display: block; }
[data-theme="light"] .icon-moon { display: block; }
[data-theme="light"] .icon-sun  { display: none; }

/* Mobile burger */
.nav-burger {
  display: none;
  background: none;
  border: 1px solid var(--border-mid);
  border-radius: 4px;
  width: 36px; height: 36px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  padding: 9px;
  cursor: pointer;
  color: var(--text-mid);
  transition: border-color 0.2s !important;
}
.nav-burger:hover { border-color: var(--text-mid); }
.nav-burger span {
  display: block;
  height: 1.5px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.25s, opacity 0.25s !important;
  width: 100%;
}
.nav-burger.open span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

.nav-drawer {
  display: none;
  position: fixed;
  top: 64px; left: 0; right: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 1.75rem 1.75rem;
  z-index: 199;
  flex-direction: column;
  gap: 1.125rem;
}
.nav-drawer.open { display: flex; }
.nav-drawer a {
  color: var(--text-mid);
  font-size: 1rem;
  text-decoration: none;
  transition: color 0.2s;
}
.nav-drawer a:hover, .nav-drawer a.active { color: var(--text); }
.nav-drawer .nav-cta-mobile {
  margin-top: 0.5rem;
  align-self: flex-start;
}

/* ─── MARQUEE ─── */
.marquee-wrap {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 0.875rem 0;
  overflow: hidden;
  background: var(--surface);
}
.marquee-track {
  display: flex;
  gap: 2.5rem;
  animation: marquee 30s linear infinite;
  width: max-content;
}
.marquee-item {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  color: var(--text-soft);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.marquee-item::before { content: '◆'; color: var(--teal); font-size: 0.45rem; }
@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ─── PAGE HERO ─── */
.page-hero {
  padding: 9rem 2.5rem 5.5rem;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.page-hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 80% 50%, var(--teal-dim) 0%, transparent 65%);
  pointer-events: none;
}
.page-hero-inner {
  max-width: 1120px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}
.page-hero .display-lg { margin-bottom: 1.25rem; }
.page-hero .lead {
  font-size: 1.0625rem;
  color: var(--text-mid);
  max-width: 540px;
  line-height: 1.75;
  font-weight: 300;
  margin-bottom: 2.25rem;
}

/* ─── CARDS ─── */
.card {
  padding: 2rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s !important;
}
.card:hover {
  border-color: var(--border-teal);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.card.card-accent { position: relative; overflow: hidden; }
.card.card-accent::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--teal), var(--blue));
  opacity: 0;
  transition: opacity 0.3s !important;
}
.card.card-accent:hover::before { opacity: 1; }

.card-icon {
  width: 2.5rem; height: 2.5rem;
  background: var(--teal-dim);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  color: var(--teal);
  letter-spacing: 0.05em;
  border: 1px solid var(--border-teal);
}

.card h3 {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.4375rem;
  font-weight: 400;
  color: var(--text);
  margin-bottom: 0.75rem;
  line-height: 1.2;
}
.card p {
  font-size: 0.875rem;
  color: var(--text-mid);
  line-height: 1.75;
}

/* Feature list inside cards */
.feat-list {
  list-style: none;
  margin-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.feat-list li {
  font-size: 0.8125rem;
  color: var(--text-mid);
  padding-left: 1.125rem;
  position: relative;
}
.feat-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--teal);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
}

/* ─── GRID UTILITIES ─── */
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.375rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.375rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.25rem; }

/* ─── STAT BLOCK ─── */
.stat-num {
  font-family: 'Cormorant Garamond', serif;
  font-size: 3rem;
  font-weight: 300;
  color: var(--teal);
  line-height: 1;
  margin-bottom: 0.5rem;
}
.stat-label {
  font-size: 0.875rem;
  color: var(--text-mid);
  line-height: 1.5;
}

/* ─── STEP/WORKFLOW ─── */
.step-row {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1.5rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}
.step-row:last-child { border-bottom: none; }
.step-num {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  color: var(--teal);
  letter-spacing: 0.1em;
  padding-top: 0.25rem;
}
.step-content h3 {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--text);
  margin-bottom: 0.5rem;
}
.step-content p {
  font-size: 0.875rem;
  color: var(--text-mid);
  line-height: 1.75;
  margin-bottom: 0.75rem;
}

/* ─── DIVIDER ─── */
.divider { border: none; border-top: 1px solid var(--border); }

/* ─── CTA STRIP ─── */
.cta-strip {
  padding: 6rem 2.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-strip-glow {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  width: 700px; height: 300px;
  background: radial-gradient(ellipse, var(--teal-glow) 0%, transparent 70%);
  pointer-events: none;
}
.cta-strip .display-md { margin-bottom: 1rem; }
.cta-strip .lead {
  font-size: 1rem;
  color: var(--text-mid);
  max-width: 440px;
  margin: 0 auto 2.5rem;
  line-height: 1.75;
  font-weight: 300;
}
.cta-strip .btn-group { justify-content: center; }
.cta-email {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8rem;
  color: var(--text-soft);
  margin-top: 1.5rem;
}
.cta-email a { color: var(--teal); }

/* ─── FOOTER ─── */
.site-footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 3rem 2.5rem 2rem;
}
.footer-grid {
  max-width: 1120px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 3rem;
}
.footer-brand .nav-logo { font-size: 1.25rem; margin-bottom: 0.875rem; }
.footer-brand p {
  font-size: 0.8125rem;
  color: var(--text-soft);
  line-height: 1.65;
  max-width: 210px;
}
.footer-col h4 {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.67rem;
  color: var(--teal);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 0.6rem; }
.footer-col a {
  font-size: 0.875rem;
  color: var(--text-soft);
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--text-mid); }
.footer-bottom {
  max-width: 1120px;
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer-copy {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  color: var(--text-soft);
}

/* ─── REVEAL ANIMATIONS ─── */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s ease, transform 0.65s ease !important;
}
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: 0.08s !important; }
.reveal-d2 { transition-delay: 0.16s !important; }
.reveal-d3 { transition-delay: 0.24s !important; }
.reveal-d4 { transition-delay: 0.32s !important; }
.reveal-d5 { transition-delay: 0.40s !important; }
.reveal-d6 { transition-delay: 0.48s !important; }

/* ─── RESPONSIVE ─── */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}
@media (max-width: 960px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2,1fr); }
  .nav-links { display: none; }
  .nav-burger { display: flex; }
}
@media (max-width: 640px) {
  .section, .cta-strip { padding: 4.5rem 1.25rem; }
  .section-sm { padding: 3.5rem 1.25rem; }
  .page-hero { padding: 7rem 1.25rem 4rem; }
  .grid-3, .grid-2, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.75rem; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .nav { padding: 0 1.25rem; }
  .nav-drawer { top: 64px; }
  .btn-group { flex-direction: column; align-items: flex-start; }
  .btn-group .btn { width: 100%; justify-content: center; }
}