/* ============================================================
   AI4NTP — /register, redesigned (v2)
   A proof-build of the unified system from the design audit:
   • one real body face (Hanken Grotesk)        [fixes F-01]
   • one reconciled set of tokens               [fixes F-05]
   • an 8px spacing scale + two containers       [fixes F-06]
   • exactly three button styles, one shape      [fixes F-04]
   • 0px geometry, restrained lime               [fixes F-07/08]
   • boxed inputs w/ real focus state            [fixes register card]
   ============================================================ */

:root {
  --ink: #0F1113;
  --ink-soft: #1C1F23;
  --paper: #F4F1EA;
  --paper-warm: #EDE7DA;
  --cream: #FAF7F0;
  --signal: #D4FF3A;
  --signal-deep: #A8D000;
  --rust: #C4471C;
  --fog: #8A8679;
  --line: rgba(15, 17, 19, 0.12);
  --line-2: rgba(15, 17, 19, 0.22);
  --line-strong: rgba(15, 17, 19, 0.32);
  --on-dark: #FAF7F0;
  --on-dark-fog: rgba(250, 247, 240, 0.64);
  --on-dark-line: rgba(250, 247, 240, 0.16);

  --font-display: 'Fraunces', Georgia, serif;
  --font-italic: 'Instrument Serif', Georgia, serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', ui-monospace, monospace;
  --font-body: 'Hanken Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;

  --s1: 4px; --s2: 8px; --s3: 12px; --s4: 16px; --s5: 24px;
  --s6: 32px; --s7: 48px; --s8: 64px; --s9: 96px; --s10: 128px;

  --container: 1200px;
  --radius: 0px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 100;
  opacity: 0.2;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}
a { color: inherit; }
::selection { background: var(--signal); color: var(--ink); }

.container { max-width: var(--container); margin: 0 auto; padding-left: var(--s8); padding-right: var(--s8); }
@media (max-width: 700px) { .container { padding-left: var(--s5); padding-right: var(--s5); } }

/* ============================================================
   HEADER — one header, the system's (fixes F-02)
   ============================================================ */
.site-header { position: sticky; top: 0; z-index: 50; background: var(--paper); }
.countdown {
  background: var(--ink);
  color: var(--on-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--s4);
  padding: 10px var(--s5);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  flex-wrap: wrap;
}
.countdown .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--signal); animation: pulse 1.6s ease-in-out infinite; }
.countdown .label { color: var(--on-dark-fog); }
.countdown .clock { color: var(--signal); font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: 0.08em; }
.countdown .cd-cta { color: var(--on-dark); text-decoration: none; border-bottom: 1px solid var(--signal); padding-bottom: 2px; transition: color 0.2s; }
.countdown .cd-cta:hover { color: var(--signal); }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1);} 50%{opacity:.4;transform:scale(.7);} }

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--s5) var(--s8);
  border-bottom: 1px solid var(--line);
  max-width: var(--container);
  margin: 0 auto;
}
@media (max-width: 700px) { .nav { padding: var(--s4) var(--s5); } }
.logo { font-family: var(--font-display); font-weight: 700; font-size: 19px; letter-spacing: -0.02em; text-decoration: none; color: var(--ink); }
.logo .four { background: var(--signal); padding: 0 5px; margin: 0 1px; border-radius: 2px; font-style: italic; }
.nav-right { display: flex; align-items: center; gap: var(--s5); }
.nav-links { display: flex; gap: var(--s5); }
.nav-link { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; text-decoration: none; color: var(--ink); opacity: 0.65; transition: opacity 0.2s, color 0.2s; }
.nav-link:hover { opacity: 1; color: var(--rust); }
@media (max-width: 760px) { .nav-links { display: none; } }

/* ============================================================
   BUTTONS — exactly three, one shape (fixes F-04)
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 15px 26px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
  white-space: nowrap;
}
.btn .arrow { transition: transform 0.2s ease; }
.btn:hover .arrow { transform: translateX(3px); }
.btn-primary { background: var(--signal); color: var(--ink); border-color: var(--signal); }
.btn-primary:hover { background: var(--ink); color: var(--signal); border-color: var(--ink); }
.btn-secondary { background: var(--ink); color: var(--cream); }
.btn-secondary:hover { background: var(--signal); color: var(--ink); border-color: var(--signal); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { background: var(--ink); color: var(--cream); border-color: var(--ink); }
.btn-block { width: 100%; padding: 18px 26px; }

/* ============================================================
   HERO
   ============================================================ */
.hero { padding: var(--s9) 0 var(--s7); position: relative; z-index: 2; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fog);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: var(--s5);
}
.eyebrow::before { content: '//'; color: var(--signal-deep); font-weight: 700; letter-spacing: -0.05em; }
.eyebrow .live { width: 7px; height: 7px; border-radius: 50%; background: var(--rust); animation: pulse 1.8s ease-in-out infinite; }
.hero h1 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(46px, 7vw, 92px);
  letter-spacing: -0.035em;
  line-height: 0.95;
  margin-bottom: var(--s5);
  max-width: 14ch;
}
.hero h1 em { font-family: var(--font-italic); font-style: italic; font-weight: 400; }
.hero h1 .mark { background: var(--signal); color: var(--ink); padding: 0 0.08em; }
.hero-sub {
  font-family: var(--font-italic);
  font-style: italic;
  font-size: clamp(20px, 2.4vw, 27px);
  line-height: 1.4;
  max-width: 40ch;
  opacity: 0.9;
}

/* ============================================================
   MAIN GRID — context+proof / sticky form
   ============================================================ */
.layout {
  display: grid;
  grid-template-columns: 1fr 460px;
  gap: var(--s8);
  align-items: start;
  padding-bottom: var(--s9);
  position: relative;
  z-index: 2;
}
@media (max-width: 940px) {
  .layout { grid-template-columns: 1fr; gap: var(--s7); }
  .form-col { order: -1; }
}

/* ---- left column: the case ---- */
.case > * + * { margin-top: var(--s7); }
.case-block .blk-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fog);
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: var(--s5);
}
.case-block .blk-label::before { content: ''; width: 26px; height: 1px; background: var(--ink); opacity: 0.4; }

/* session summary card */
.session-card { border: 1px solid var(--ink); background: var(--cream); }
.session-card .sc-top { padding: var(--s6); border-bottom: 1px solid var(--line); }
.session-card .sc-ep { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--rust); margin-bottom: var(--s4); }
.session-card h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(24px, 3vw, 32px);
  letter-spacing: -0.02em;
  line-height: 1.08;
}
.session-card h2 em { font-family: var(--font-italic); font-style: italic; font-weight: 400; }
.session-card .sc-desc { margin-top: var(--s4); font-size: 16px; line-height: 1.55; opacity: 0.85; max-width: 60ch; }
.sc-meta { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); }
.sc-meta .cell { padding: var(--s5) var(--s4); border-right: 1px solid var(--line); }
.sc-meta .cell:last-child { border-right: none; }
.sc-meta .k { font-family: var(--font-mono); font-size: 9.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--fog); margin-bottom: 7px; }
.sc-meta .v { font-family: var(--font-display); font-weight: 500; font-size: 17px; letter-spacing: -0.01em; line-height: 1.1; }
.sc-meta .v em { font-family: var(--font-italic); font-style: italic; font-weight: 400; }
@media (max-width: 560px) { .sc-meta { grid-template-columns: repeat(2, 1fr); } .sc-meta .cell:nth-child(2) { border-right: none; } .sc-meta .cell:nth-child(-n+2) { border-bottom: 1px solid var(--line); } }
.sc-speakers { padding: var(--s5) var(--s6); display: flex; align-items: center; gap: var(--s4); flex-wrap: wrap; }
.sc-avatars { display: flex; }
.sc-avatars img { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; filter: grayscale(100%) contrast(1.05); border: 2px solid var(--cream); margin-left: -10px; }
.sc-avatars img:first-child { margin-left: 0; }
.sc-speakers .names { font-size: 14px; line-height: 1.4; opacity: 0.85; }
.sc-speakers .names b { font-weight: 600; }

/* takeaways */
.takeaways { list-style: none; }
.takeaways li { display: grid; grid-template-columns: 40px 1fr; gap: var(--s4); padding: var(--s5) 0; border-top: 1px solid var(--line); align-items: start; }
.takeaways li:last-child { border-bottom: 1px solid var(--line); }
.takeaways .n { font-family: var(--font-display); font-style: italic; font-weight: 300; font-size: 30px; color: var(--signal-deep); line-height: 1; }
.takeaways h3 { font-family: var(--font-display); font-weight: 600; font-size: 19px; letter-spacing: -0.01em; margin-bottom: 4px; }
.takeaways p { font-size: 15.5px; line-height: 1.5; opacity: 0.82; max-width: 56ch; }

/* testimonial */
.proof { border-left: 2px solid var(--signal); padding-left: var(--s6); }
.proof blockquote { font-family: var(--font-display); font-weight: 300; font-size: clamp(21px, 2.6vw, 28px); line-height: 1.25; letter-spacing: -0.015em; text-wrap: pretty; }
.proof .who { display: flex; align-items: center; gap: var(--s4); margin-top: var(--s5); }
.proof .ini { width: 46px; height: 46px; border-radius: 50%; background: var(--ink); color: var(--signal); display: flex; align-items: center; justify-content: center; font-family: var(--font-mono); font-size: 14px; font-weight: 700; flex-shrink: 0; }
.proof .who .nm { font-weight: 600; font-size: 15.5px; }
.proof .who .tt { font-size: 13.5px; opacity: 0.7; line-height: 1.35; }
.trust-row { display: flex; flex-wrap: wrap; gap: var(--s2) var(--s5); margin-top: var(--s6); font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--fog); }
.trust-row span { display: inline-flex; align-items: center; gap: 7px; }
.trust-row span::before { content: ''; width: 5px; height: 5px; background: var(--signal-deep); }

/* what happens next */
.next-steps { list-style: none; counter-reset: step; }
.next-steps li { display: grid; grid-template-columns: 34px 1fr; gap: var(--s4); padding: var(--s5) 0; border-top: 1px solid var(--line); align-items: baseline; }
.next-steps li:last-child { border-bottom: 1px solid var(--line); }
.next-steps li::before {
  counter-increment: step;
  content: counter(step);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--ink);
  width: 26px; height: 26px;
  border: 1px solid var(--ink);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.next-steps h3 { font-family: var(--font-display); font-weight: 600; font-size: 18px; letter-spacing: -0.01em; margin-bottom: 3px; }
.next-steps p { font-size: 15px; line-height: 1.5; opacity: 0.8; max-width: 56ch; }

/* ============================================================
   FORM CARD (sticky) — boxed inputs, real focus
   ============================================================ */
.form-col { position: sticky; top: 96px; }
@media (max-width: 940px) { .form-col { position: static; } }
.form-card { border: 1px solid var(--ink); background: var(--cream); padding: var(--s7); }
.form-card .fc-eyebrow {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--fog); display: flex; align-items: center; gap: 10px; margin-bottom: var(--s4);
}
.form-card .fc-eyebrow::before { content: ''; width: 22px; height: 1px; background: var(--ink); opacity: 0.4; }
.form-card h2 { font-family: var(--font-display); font-weight: 500; font-size: clamp(26px, 3vw, 32px); letter-spacing: -0.02em; line-height: 1.02; margin-bottom: var(--s3); }
.form-card .fc-sub { font-size: 15px; line-height: 1.5; opacity: 0.78; margin-bottom: var(--s6); }

.field { margin-bottom: var(--s5); }
.field label { display: block; font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--fog); margin-bottom: var(--s2); }
.field label .req { color: var(--rust); }
.field label .opt { font-family: var(--font-italic); font-style: italic; text-transform: none; letter-spacing: 0; font-size: 12px; opacity: 0.7; margin-left: 6px; }
.input {
  width: 100%;
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 13px 14px;
  transition: border-color 0.18s, box-shadow 0.18s, background 0.18s;
}
.input::placeholder { color: var(--fog); }
.input:focus { outline: none; border-color: var(--ink); background: var(--cream); box-shadow: inset 0 -3px 0 var(--signal); }
textarea.input { resize: vertical; min-height: 72px; line-height: 1.5; }
.input.invalid { border-color: var(--rust); box-shadow: inset 0 -3px 0 var(--rust); }
.field-error { display: none; margin-top: 7px; font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--rust); }
.field-error.show { display: block; }

.checks { display: flex; flex-direction: column; gap: var(--s3); }
.check { display: flex; align-items: flex-start; gap: var(--s3); cursor: pointer; font-size: 15px; line-height: 1.4; }
.check input { margin-top: 3px; width: 17px; height: 17px; accent-color: var(--ink); flex-shrink: 0; }

.form-card .fineprint { margin-top: var(--s4); font-family: var(--font-italic); font-style: italic; font-size: 14px; opacity: 0.65; text-align: center; }
.form-trust { margin-top: var(--s5); padding-top: var(--s5); border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; justify-content: center; gap: var(--s2) var(--s5); font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--fog); }
.form-trust span { display: inline-flex; align-items: center; gap: 6px; }
.form-trust span::before { content: ''; width: 5px; height: 5px; background: var(--signal-deep); }

/* ---- branded success (replaces abrupt redirect) ---- */
.form-success { display: none; }
.form-success.show { display: block; }
.form-card.is-success .form-real { display: none; }
.success-icon { width: 64px; height: 64px; border-radius: 50%; background: var(--signal); display: flex; align-items: center; justify-content: center; margin-bottom: var(--s5); }
.success-icon svg { width: 30px; height: 30px; }
.form-success h2 { font-family: var(--font-display); font-weight: 500; font-size: 32px; letter-spacing: -0.02em; margin-bottom: var(--s3); }
.form-success > p { font-size: 15.5px; line-height: 1.55; opacity: 0.82; margin-bottom: var(--s6); }
.success-next { list-style: none; counter-reset: sx; margin-bottom: var(--s6); }
.success-next li { display: grid; grid-template-columns: 26px 1fr; gap: var(--s3); padding: var(--s4) 0; border-top: 1px solid var(--line); font-size: 14.5px; line-height: 1.4; align-items: baseline; }
.success-next li:last-child { border-bottom: 1px solid var(--line); }
.success-next li::before { counter-increment: sx; content: counter(sx); font-family: var(--font-mono); font-size: 11px; font-weight: 700; color: var(--signal-deep); }
.success-next b { font-weight: 600; }
.redirect-note { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--fog); text-align: center; margin-top: var(--s5); }
.redirect-note a { color: var(--ink); border-bottom: 1px solid var(--signal-deep); text-decoration: none; }

/* ============================================================
   FOOTER (compact, on-system)
   ============================================================ */
.foot { background: var(--ink); color: var(--on-dark); border-top: 2px solid var(--signal); position: relative; z-index: 2; }
.foot-in { max-width: var(--container); margin: 0 auto; padding: var(--s7) var(--s8); display: flex; justify-content: space-between; align-items: center; gap: var(--s5); flex-wrap: wrap; }
.foot .logo { color: var(--on-dark); font-size: 22px; }
.foot .logo .four { color: var(--ink); }
.foot .ft-tag { font-family: var(--font-italic); font-style: italic; font-size: 14px; color: var(--on-dark-fog); }
.foot .ft-legal { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--on-dark-fog); display: flex; gap: var(--s5); }
.foot .ft-legal a { text-decoration: none; transition: color 0.2s; }
.foot .ft-legal a:hover { color: var(--signal); }
@media (max-width: 700px) { .foot-in { flex-direction: column; text-align: center; padding: var(--s6) var(--s5); } }

/* ---- proof-of-redesign badge ---- */
.v2-badge {
  position: fixed;
  left: var(--s5);
  bottom: var(--s5);
  z-index: 80;
  background: var(--ink);
  color: var(--on-dark);
  border: 1px solid var(--signal);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 8px 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.v2-badge b { color: var(--signal); font-weight: 700; }
@media (max-width: 940px) { .v2-badge { display: none; } }

/* reveal */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .countdown .dot, .eyebrow .live { animation: none; }
}