/* ==========================================================================
   Design tokens
   ========================================================================== */
:root{
  --paper: #EEF1F4;
  --paper-deep: #E1E7EE;
  --ink: #141B24;
  --ink-soft: #4A5568;
  --blueprint: #2F5F86;
  --blueprint-deep: #1F4363;
  --uncertainty: #7C5CBF;
  --uncertainty-soft: #B7A6E0;
  --grid: #C7D0DB;
  --paper-rgb: 238,241,244;
}

/* ==========================================================================
   Base
   ========================================================================== */
*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin:0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3{
  font-family: 'Fraunces', serif;
  font-weight: 450;
  margin: 0;
  color: var(--ink);
}

a{ color: inherit; }

.mono{
  font-family: 'IBM Plex Mono', monospace;
  letter-spacing: 0.02em;
}

.wrap{
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 32px;
}

.visually-hidden{
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

section{ padding: 88px 0; }

/* ==========================================================================
   Shared components
   ========================================================================== */
.eyebrow{
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blueprint);
  display: flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before{
  content: '';
  width: 22px;
  height: 1px;
  background: var(--blueprint);
  display: inline-block;
}

.section-head{
  max-width: 620px;
  margin-bottom: 48px;
}
.section-head h2{
  font-size: clamp(26px, 3vw, 36px);
  margin-top: 14px;
  line-height: 1.18;
}

.btn{
  font-family: 'Inter', sans-serif;
  font-size: 14.5px;
  font-weight: 500;
  padding: 13px 22px;
  border-radius: 3px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn-primary{
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
}
.btn-primary:hover{ background: var(--blueprint-deep); border-color: var(--blueprint-deep); }
.btn-secondary{
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
}
.btn-secondary:hover{ background: var(--ink); color: var(--paper); }

.form-row input[type="email"]:focus,
.btn:focus-visible,
.nav-cta:focus-visible,
.nav-links a:focus-visible{
  outline: 2px solid var(--uncertainty-soft);
  outline-offset: 2px;
}

/* ==========================================================================
   Nav
   ========================================================================== */
.nav{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(var(--paper-rgb), 0.86);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--grid);
}
.nav-inner{
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand{
  font-family: 'Fraunces', serif;
  font-size: 20px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.brand .dot{ color: var(--uncertainty); }
.nav-links{
  display: flex;
  gap: 32px;
  font-size: 14px;
}
.nav-links a{
  text-decoration: none;
  color: var(--ink-soft);
  transition: color 0.15s ease;
}
.nav-links a:hover{ color: var(--blueprint-deep); }
.nav-cta{
  font-size: 14px;
  padding: 9px 18px;
  border: 1px solid var(--ink);
  border-radius: 3px;
  text-decoration: none;
  white-space: nowrap;
}
.nav-cta:hover{ background: var(--ink); color: var(--paper); }

@media (max-width: 720px){
  .nav-links{ display: none; }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{
  padding: 96px 0 72px;
  border-bottom: 1px solid var(--grid);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 44px 44px;
  background-position: center -1px;
  background-repeat: repeat;
  position: relative;
}
.hero::after{
  content:'';
  position:absolute; inset:0;
  z-index: 0;
  background: radial-gradient(ellipse at 60% 30%, rgba(var(--paper-rgb),0.15), var(--paper) 72%);
  pointer-events: none;
}
.hero-grid{
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}
@media (max-width: 900px){
  .hero-grid{ grid-template-columns: 1fr; }
}
.hero h1{
  font-size: clamp(34px, 4.4vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 18px 0 22px;
}
.hero h1 em{
  font-style: italic;
  color: var(--blueprint-deep);
}
.hero p.lede{
  font-size: 18px;
  color: var(--ink-soft);
  max-width: 46ch;
  margin-bottom: 34px;
}
.cta-row{
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* ---- Signature visual ---- */
.signature-box{
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 420px;
  margin: 0 auto;
}
.signature-caption{
  margin-top: 14px;
  text-align: center;
  font-size: 12.5px;
  color: var(--ink-soft);
}
.sample-path{
  fill: none;
  stroke: var(--uncertainty-soft);
  stroke-width: 1.3;
  opacity: 0.55;
}
.mean-path{
  fill: rgba(124,92,191,0.06);
  stroke: var(--blueprint-deep);
  stroke-width: 2.2;
}
@media (prefers-reduced-motion: no-preference){
  .sample-path{ animation: drift 7s ease-in-out infinite; }
  .sample-path:nth-child(1){ animation-delay: 0s; }
  .sample-path:nth-child(2){ animation-delay: -1.4s; }
  .sample-path:nth-child(3){ animation-delay: -2.8s; }
  .sample-path:nth-child(4){ animation-delay: -4.2s; }
  .sample-path:nth-child(5){ animation-delay: -5.6s; }
}
@keyframes drift{
  0%, 100%{ opacity: 0.25; transform: scale(1); }
  50%{ opacity: 0.6; transform: scale(1.008); }
}

/* ==========================================================================
   The gap
   ========================================================================== */
.gap-section{ border-bottom: 1px solid var(--grid); }
.gap-panels{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
@media (max-width: 720px){ .gap-panels{ grid-template-columns: 1fr; } }
.gap-card{
  background: var(--paper-deep);
  border: 1px solid var(--grid);
  border-radius: 4px;
  padding: 28px;
}
.gap-card .mono.label{
  font-size: 11.5px;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.gap-card h3{
  font-size: 21px;
  margin: 8px 0 14px;
}
.gap-card p{
  color: var(--ink-soft);
  font-size: 14.5px;
  margin: 0;
}
.gap-card svg{ display:block; width:100%; height: 120px; margin-bottom: 16px; }

/* ==========================================================================
   Services
   ========================================================================== */
.services-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
  border-radius: 4px;
  overflow: hidden;
}
@media (max-width: 720px){ .services-grid{ grid-template-columns: 1fr; } }
.service-card{
  background: var(--paper);
  padding: 40px;
}
.service-card .eyebrow{ margin-bottom: 18px; }
.service-card h3{
  font-size: 25px;
  margin-bottom: 14px;
}
.service-card p.desc{
  color: var(--ink-soft);
  margin-bottom: 22px;
}
.service-card ul{
  list-style: none;
  padding: 0;
  margin: 0 0 26px;
}
.service-card li{
  display: flex;
  gap: 10px;
  padding: 9px 0;
  border-top: 1px solid var(--grid);
  font-size: 14.5px;
  color: var(--ink);
}
.service-card li:before{
  content: '—';
  color: var(--uncertainty);
  flex-shrink: 0;
}

/* ==========================================================================
   Curriculum
   ========================================================================== */
.curriculum-section{ border-top: 1px solid var(--grid); border-bottom: 1px solid var(--grid); background: var(--paper-deep); }
.module{
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 22px;
  padding: 26px 0;
  border-top: 1px solid var(--grid);
}
.module:last-child{ border-bottom: 1px solid var(--grid); }
.module .num{
  font-family: 'IBM Plex Mono', monospace;
  font-size: 14px;
  color: var(--blueprint);
  padding-top: 2px;
}
.module h3{
  font-size: 18.5px;
  margin-bottom: 6px;
}
.module p{
  color: var(--ink-soft);
  font-size: 14.5px;
  margin: 0;
  max-width: 60ch;
}

/* ==========================================================================
   About
   ========================================================================== */
.about-grid{
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 44px;
  align-items: start;
}
@media (max-width: 720px){ .about-grid{ grid-template-columns: 1fr; } }
.avatar{
  width: 160px;
  aspect-ratio: 1 / 1;
  border-radius: 4px;
  background: var(--paper-deep);
  border: 1px dashed var(--grid);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--ink-soft);
  text-align: center;
  padding: 12px;
  overflow: hidden;
}
.avatar img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
}
.about-text h2{
  font-size: 28px;
  margin: 14px 0 18px;
}
.about-text p{
  color: var(--ink-soft);
  margin: 0 0 16px;
  max-width: 62ch;
}
.credentials{
  list-style: none;
  padding: 0;
  margin: 22px 0 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.credentials li{
  font-size: 14px;
  display: flex;
  gap: 10px;
}
.credentials li .mono{
  color: var(--blueprint-deep);
  flex-shrink: 0;
}

/* ==========================================================================
   Waitlist
   ========================================================================== */
.waitlist-section{
  text-align: center;
}
.waitlist-card{
  background: var(--ink);
  color: var(--paper);
  border-radius: 6px;
  padding: 64px 40px;
  background-image: radial-gradient(circle at 30% 20%, rgba(124,92,191,0.25), transparent 55%);
}
.waitlist-card .eyebrow{ color: var(--uncertainty-soft); justify-content: center; }
.waitlist-card .eyebrow::before{ background: var(--uncertainty-soft); }
.waitlist-card h2{
  color: var(--paper);
  font-size: clamp(26px, 3.4vw, 38px);
  margin: 16px 0 12px;
}
.waitlist-card p{
  color: #B9C2CE;
  max-width: 50ch;
  margin: 0 auto 30px;
}
.form-row{
  display: flex;
  gap: 10px;
  max-width: 440px;
  margin: 0 auto;
  flex-wrap: wrap;
  justify-content: center;
}
.form-row input[type="email"]{
  flex: 1 1 240px;
  padding: 13px 16px;
  border-radius: 3px;
  border: 1px solid #3B4453;
  background: #1C2531;
  color: var(--paper);
  font-family: 'Inter', sans-serif;
  font-size: 14.5px;
}
.form-row input[type="email"]::placeholder{ color: #7C8899; }
.form-row button{
  padding: 13px 22px;
  border-radius: 3px;
  border: none;
  background: var(--uncertainty);
  color: white;
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  font-size: 14.5px;
  cursor: pointer;
  transition: background 0.15s ease;
}
.form-row button:hover{ background: #6947AD; }
.form-note{
  margin-top: 14px;
  font-size: 12.5px;
  color: #7C8899;
}
.form-success{
  display: none;
  font-size: 14.5px;
  color: var(--uncertainty-soft);
  margin-top: 4px;
}
.form-success.is-visible{ display: block; }
#contact-form.is-hidden{ display: none; }

/* ==========================================================================
   Footer
   ========================================================================== */
footer{
  padding: 40px 0 48px;
  border-top: 1px solid var(--grid);
}
.footer-row{
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--ink-soft);
}
.footer-links{
  display: flex;
  gap: 22px;
}
.footer-links a{ text-decoration: none; color: var(--ink-soft); }
.footer-links a:hover{ color: var(--ink); }