/* ===========================================================================
   LearningUtils — landing page styles
   Loaded after variables.css (which defines the design tokens).
   =========================================================================== */

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.62; -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
::selection { background: var(--mark); color: var(--ink); }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 26px; }
section { padding: 104px 0; position: relative; }

h1, h2, h3, .serif { font-family: 'Fraunces', Georgia, serif; font-weight: 600; letter-spacing: -.015em; line-height: 1.08; margin: 0; }
h2 { font-size: clamp(30px, 4.4vw, 50px); }
.mono { font-family: 'Space Mono', monospace; }

.kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: 'Space Mono', monospace; font-size: 12.5px; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2);
  margin-bottom: 22px;
}
.kicker .sq { width: 9px; height: 9px; background: var(--coral); border-radius: 2px; }
.lede { font-size: 18.5px; color: var(--ink-2); max-width: 600px; }
.section-head { max-width: 700px; margin-bottom: 52px; }
.center { text-align: center; margin-left: auto; margin-right: auto; }

/* SVG icons — inherit color via currentColor, crisp at any size */
.icon {
  width: 26px; height: 26px; display: block;
  fill: none; stroke: currentColor; stroke-width: 2;
  stroke-linecap: round; stroke-linejoin: round;
}

/* Inline icon contexts — icons that sit alongside text */
.plan-badge .icon { width: 13px; height: 13px; }
.sticky .icon,
.src-meta .icon,
.frame-empty .icon,
.tool-cat .label .icon,
.tap-hint .icon { display: inline-block; vertical-align: -2px; }
.sticky .icon { width: 14px; height: 14px; }
.src-meta .icon { width: 13px; height: 13px; margin-right: 2px; vertical-align: -2px; }
.frame-empty .icon { width: 16px; height: 16px; margin-right: 5px; vertical-align: -3px; }
.tool-cat .label .icon { width: 15px; height: 15px; margin-right: 6px; vertical-align: -3px; }
.tap-hint .icon { width: 15px; height: 15px; margin-right: 3px; vertical-align: -3px; }
.tool .icon { width: 18px; height: 18px; flex: 0 0 auto; }
.feature-list .ck .icon { width: 19px; height: 19px; }
.plat-card .pe { display: inline-flex; }
.plat-card .pe .icon { width: 30px; height: 30px; color: var(--ink); }
.winbtns { display: inline-flex; gap: 9px; align-items: center; }
.winbtns .icon { width: 13px; height: 13px; color: var(--ink-2); }
.lang .sep { display: inline-block; width: 13px; height: 13px; color: var(--coral); vertical-align: middle; }

/* Highlighter marker */
.hl { position: relative; white-space: nowrap; }
.hl::before {
  content: ""; position: absolute; left: -.08em; right: -.08em; top: 12%; bottom: 8%;
  background: var(--mark); z-index: -1; border-radius: 3px; transform: rotate(-1.1deg);
  transform-origin: left center; transition: transform .2s;
}
.hl.draw::before { animation: draw 1s .35s cubic-bezier(.6,.1,.2,1) both; }
@keyframes draw { from { transform: scaleX(0) rotate(-1.1deg); } to { transform: scaleX(1) rotate(-1.1deg); } }
.underline-doodle { color: var(--navy); position: relative; }

/* Buttons — sticker style */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: 'Inter', sans-serif; font-weight: 700; font-size: 15px;
  padding: 13px 22px; border-radius: 12px; border: 2px solid var(--ink); cursor: pointer;
  background: var(--paper); color: var(--ink);
  box-shadow: 4px 4px 0 var(--ink); transition: transform .12s, box-shadow .12s, background .15s;
}
.btn:hover { transform: translate(-2px,-2px); box-shadow: 6px 6px 0 var(--ink); }
.btn:active { transform: translate(2px,2px); box-shadow: 1px 1px 0 var(--ink); }
.btn .icon { width: 18px; height: 18px; }
.btn-ico { width: 17px; height: 17px; object-fit: contain; display: block; flex: 0 0 auto; }
.btn-ico-light { filter: brightness(0) invert(1); } /* render the black Apple logo white on dark buttons */
.btn-ico-apple { transform: translateY(-1.5px); } /* optical nudge so the Apple mark aligns with the text */
.btn-primary { background: var(--navy); color: #fff; }
.btn-mark { background: var(--mark); }
.btn-ink { background: var(--ink); color: var(--paper); }

/* Nav */
header.nav { position: sticky; top: 0; z-index: 60; background: var(--paper); border-bottom: 2px solid var(--ink); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; font-family:'Fraunces',serif; font-weight: 700; font-size: 21px; }
.logo .mark { width: 32px; height: 32px; border-radius: 9px; display: grid; place-items: center; background: var(--mark); border: 2px solid var(--ink); transform: rotate(-6deg); }
.logo .mark .icon { width: 19px; height: 19px; color: var(--ink); }
.logo .logo-img { width: 32px; height: 32px; border-radius: 8px; display: block; flex-shrink: 0; }
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a.link { font-size: 14.5px; color: var(--ink-2); font-weight: 600; position: relative; }
.nav-links a.link::after { content:""; position:absolute; left:0; right:100%; bottom:-3px; height:2px; background:var(--coral); transition:right .2s; }
.nav-links a.link:hover { color: var(--ink); }
.nav-links a.link:hover::after { right: 0; }
.nav-links .btn { padding: 9px 16px; font-size: 14px; border-radius: 10px; box-shadow: 3px 3px 0 var(--ink); }
.nav-links .btn:hover { box-shadow: 5px 5px 0 var(--ink); }
.nav-links .btn .icon { width: 16px; height: 16px; }
.menu-btn { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.menu-btn span { display: block; width: 23px; height: 2.5px; background: var(--ink); margin: 5px 0; border-radius: 2px; }

/* Hero */
.hero { padding: 78px 0 92px; overflow: hidden; }
.hero::before {
  content:""; position:absolute; inset:0; z-index:-2;
  background-image: linear-gradient(var(--hair) 1px, transparent 1px);
  background-size: 100% 34px; opacity: .28; mask-image: linear-gradient(180deg, transparent, #000 18%, #000 70%, transparent);
}
.hero-grid { display: grid; grid-template-columns: 1.04fr .96fr; gap: 60px; align-items: center; }
.badge-row { display:flex; align-items:center; gap:10px; margin-bottom: 24px; flex-wrap:wrap; }
.hero h1 { font-size: clamp(38px, 5.6vw, 66px); font-weight: 600; line-height: 1.02; }
.hero h1 em { font-style: italic; font-weight: 500; color: var(--navy); }
.hero .sub { font-size: 19px; color: var(--ink-2); margin: 26px 0 32px; max-width: 510px; }
.hero .sub b { color: var(--ink); }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.hero-note { margin-top: 22px; font-family:'Space Mono',monospace; font-size: 12.5px; color: var(--ink-3); }
.hero-note b { color: var(--ink-2); }

/* doodle arrow */
.doodle-arrow { position: absolute; right: 24%; top: -86px; width: 124px; transform: rotate(14deg); pointer-events:none; }
.scribble { stroke: var(--coral); stroke-width: 3; fill: none; stroke-linecap: round; stroke-dasharray: 400; stroke-dashoffset: 400; }
.in .scribble { animation: dash 1.1s .3s ease forwards; }
@keyframes dash { to { stroke-dashoffset: 0; } }

/* Chat mockup */
.mock { position: relative; background: #fff; border: 2px solid var(--ink); border-radius: 16px; box-shadow: 10px 12px 0 var(--ink); transform: rotate(1.4deg); }
.mock::after { /* tape */ content:""; position:absolute; top:-13px; left: 50%; width: 92px; height: 26px; transform: translateX(-50%) rotate(-2deg); background: rgba(255,214,58,.6); border: 1px dashed rgba(0,0,0,.25); }
.mock-bar { display: flex; align-items: center; gap: 7px; padding: 13px 16px; border-bottom: 2px solid var(--ink); background: var(--paper); border-radius: 14px 14px 0 0; }
.mock-bar .tl { width: 11px; height: 11px; border-radius: 50%; border: 2px solid var(--ink); }
.mock-bar .tl.r { background: var(--coral); } .mock-bar .tl.y { background: var(--mark); } .mock-bar .tl.g { background: var(--green); }
.mock-bar .title { margin-left: 9px; font-family:'Space Mono',monospace; font-size: 12px; color: var(--ink-2); font-weight: 700; }
.mock-body { padding: 22px; min-height: 248px; }
.bubble-q { background: var(--navy); color: #fff; padding: 11px 15px; border-radius: 14px 14px 4px 14px; font-size: 14px; font-weight: 500; max-width: 80%; margin-left: auto; opacity:0; transform: translateY(8px); }
.bubble-a { background: var(--paper); border: 2px solid var(--ink); padding: 15px 16px; border-radius: 14px 14px 14px 4px; font-size: 14.5px; color: var(--ink-2); margin-top: 16px; opacity:0; transform: translateY(8px); }
.show { animation: pop .4s ease forwards; }
@keyframes pop { to { opacity:1; transform: translateY(0); } }
.caret { display:inline-block; width:8px; height:16px; background:var(--navy); margin-left:1px; vertical-align:-2px; animation: blink .9s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.plan-badge {
  display: inline-flex; align-items: center; gap: 6px; font-family:'Space Mono',monospace;
  font-size: 11px; font-weight: 700; color: var(--ink); background: var(--mark);
  border: 1.5px solid var(--ink); border-radius: 6px; padding: 3px 8px; margin-bottom: 11px;
  transform: rotate(-1.5deg);
}
.cite {
  display: inline-flex; align-items: center; justify-content: center; min-width: 19px; height: 19px;
  padding: 0 5px; margin: 0 1.5px; font-family:'Space Mono',monospace; font-size: 11px; font-weight: 700;
  color: #fff; background: var(--navy); border-radius: 5px; cursor: pointer; vertical-align: middle; transition: .14s;
}
.cite:hover, .cite.active { background: var(--coral); transform: translateY(-1px); }
.src-pop {
  display:none; margin-top: 14px; border: 2px solid var(--ink); border-left: 5px solid var(--mark-d);
  background: #fff; border-radius: 9px; padding: 11px 13px; font-size: 12.5px; color: var(--ink-2);
  box-shadow: 4px 4px 0 rgba(23,22,15,.12);
}
.src-pop.open { display:block; animation: pop .3s ease forwards; opacity:0; }
.src-pop .src-meta { font-family:'Space Mono',monospace; font-size: 10.5px; font-weight: 700; color: var(--navy); text-transform: uppercase; margin-bottom: 4px; }

/* sticky note */
.sticky {
  position: absolute; right: -26px; bottom: -28px; width: 150px; background: var(--mark);
  border: 2px solid var(--ink); padding: 13px 14px; font-size: 12.5px; font-weight: 600; color: var(--ink);
  box-shadow: 5px 5px 0 var(--ink); transform: rotate(5deg); border-radius: 2px;
  font-family:'Inter',sans-serif; line-height:1.35;
}
.sticky b { font-family:'Fraunces',serif; }

/* Cards */
.grid { display: grid; gap: 22px; }
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-4 { grid-template-columns: repeat(4, 1fr); }
.card { background: var(--paper); border: 2px solid var(--ink); border-radius: 14px; padding: 26px; box-shadow: 5px 5px 0 var(--ink); transition: transform .14s, box-shadow .14s; }
.card:hover { transform: translate(-3px,-3px); box-shadow: 8px 8px 0 var(--ink); }
.card .ic { width: 50px; height: 50px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 16px; border: 2px solid var(--ink); color: var(--ink); }
.card h3 { font-size: 21px; margin-bottom: 9px; color: var(--ink); }
.card p { font-size: 14.5px; color: var(--ink-2); margin: 0; }
.tag { display: inline-block; font-family:'Space Mono',monospace; font-size: 10.5px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-2); margin-top: 16px; }

.alt { background: var(--paper-2); }

/* Trust */
.trust-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.promise { display: flex; gap: 15px; margin-bottom: 24px; }
.promise .pi { flex: 0 0 auto; width: 44px; height: 44px; border-radius: 11px; display: grid; place-items: center; border: 2px solid var(--ink); box-shadow: 3px 3px 0 var(--ink); color: var(--ink); }
.promise h4 { font-family:'Fraunces',serif; margin: 2px 0 3px; font-size: 19px; font-weight: 600; }
.promise p { margin: 0; font-size: 14.5px; color: var(--ink-2); }

/* Notebook */
.nb-grid { display: grid; grid-template-columns: .92fr 1.08fr; gap: 56px; align-items: center; }
.dropzone { position: relative; border: 3px dashed var(--ink); border-radius: 16px; background: #fff; padding: 44px 28px; text-align: center; transform: rotate(-1deg); }
.dropzone .big .icon { width: 42px; height: 42px; color: var(--ink); margin: 0 auto 8px; }
.dropzone .hint { font-family:'Space Mono',monospace; font-size: 12px; color: var(--ink-3); margin-top: 6px; }
.chips { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 18px; justify-content: center; }
.chip { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 700; color: var(--ink); background: var(--paper); border: 2px solid var(--ink); border-radius: 999px; padding: 6px 13px; box-shadow: 2px 2px 0 var(--ink); }
.chip .icon { width: 17px; height: 17px; }
.feature-list { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 13px; }
.feature-list li { display: flex; gap: 12px; font-size: 15.5px; color: var(--ink-2); }
.feature-list .ck { color: var(--green); font-weight: 800; flex: 0 0 auto; }

/* Artifacts — dark band */
.dark { background: var(--band); color: var(--paper); }
.dark::before {
  content:""; position:absolute; inset:0; opacity:.10;
  background-image: radial-gradient(#fff 1.3px, transparent 1.3px); background-size: 22px 22px;
}
.dark h2, .dark .serif { color: #fff; }
.dark .kicker { color: var(--mark); }
.dark .kicker .sq { background: var(--coral); }
.dark .lede { color: rgba(249,245,236,.78); }
.dark .card { background: #fbf8f0; box-shadow: 5px 5px 0 #0d1538; }
.dark .card:hover { box-shadow: 8px 8px 0 #0d1538; }

/* Tools */
.tool-cat .label { font-family:'Space Mono',monospace; font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 13px; }
.tool-row { display: flex; flex-wrap: wrap; gap: 11px; }
.tool { display: inline-flex; align-items: center; gap: 9px; font-size: 14px; font-weight: 700; background: var(--paper); border: 2px solid var(--ink); border-radius: 11px; padding: 11px 15px; box-shadow: 3px 3px 0 var(--ink); transition: .12s; }
.tool:hover { transform: translate(-2px,-2px); box-shadow: 5px 5px 0 var(--ink); }

/* Languages marquee */
.marquee { overflow: hidden; border-top: 2px solid var(--ink); border-bottom: 2px solid var(--ink); padding: 18px 0; background: var(--mark); }
.marquee-track { display: flex; gap: 0; width: max-content; animation: scroll 34s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes scroll { to { transform: translateX(-50%); } }
.lang { font-family:'Fraunces',serif; font-size: 22px; font-weight: 600; color: var(--ink); padding: 0 26px; display: inline-flex; align-items: center; gap: 9px; white-space: nowrap; }

/* Platform */
.plat { display: flex; gap: 22px; justify-content: center; flex-wrap: wrap; }
.plat-card { display: flex; align-items: center; gap: 15px; background: var(--paper); border: 2px solid var(--ink); border-radius: 14px; padding: 20px 26px; box-shadow: 5px 5px 0 var(--ink); min-width: 256px; }
.plat-card .pe { font-size: 32px; }
.plat-card .pt { font-family:'Fraunces',serif; font-weight: 700; font-size: 18px; display:flex; align-items:center; gap:8px; }
.plat-card .ps { font-size: 13px; color: var(--ink-3); }
.badge-live { font-family:'Space Mono',monospace; font-size: 10px; font-weight: 700; color: #fff; background: var(--green); padding: 2px 8px; border-radius: 999px; border:1.5px solid var(--ink); }
.badge-soon { font-family:'Space Mono',monospace; font-size: 10px; font-weight: 700; color: var(--ink); background: var(--mark); padding: 2px 8px; border-radius: 999px; border:1.5px solid var(--ink); }

/* Screenshots */
.shotwrap { position: relative; }
img[data-shot] { display: none; }
img[data-shot].loaded { display: block; width: 100%; border: 2px solid var(--ink); border-radius: 14px; box-shadow: 10px 12px 0 var(--ink); }
.showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; margin-bottom: 46px; }
.frame { margin: 0; border: 2px solid var(--ink); border-radius: 14px; overflow: hidden; background: #fff; box-shadow: 6px 6px 0 var(--ink); transition: transform .14s, box-shadow .14s; }
.frame:hover { transform: translate(-3px,-3px); box-shadow: 9px 9px 0 var(--ink); }
.frame-bar { display: flex; align-items: center; gap: 7px; padding: 10px 13px; background: var(--paper); border-bottom: 2px solid var(--ink); }
.frame-bar .tl { width: 11px; height: 11px; border-radius: 50%; border: 2px solid var(--ink); }
.frame-bar .tl.r { background: var(--coral); } .frame-bar .tl.y { background: var(--mark); } .frame-bar .tl.g { background: var(--green); }
.frame-bar.win { background: #eef1f5; justify-content: space-between; }
.frame-title { font-family:'Space Mono',monospace; font-size: 11.5px; font-weight: 700; color: var(--ink-2); margin-left: 8px; }
.frame-bar.win .frame-title { margin-left: 0; }
.winbtns { font-family:'Space Mono',monospace; font-size: 13px; letter-spacing: 5px; color: var(--ink-2); }
.frame-body { position: relative; min-height: 244px; display: grid; place-items: center; background: repeating-linear-gradient(45deg, #fbfbf9, #fbfbf9 12px, #f4f3ee 12px, #f4f3ee 24px); }
.frame-body img[data-shot].loaded { border: 0; border-radius: 0; box-shadow: none; width: 100%; }
.frame-empty { font-family:'Space Mono',monospace; font-size: 13px; color: var(--ink-3); text-align: center; padding: 0 16px; }
.frame-empty code { background: var(--paper-2); border: 1px solid var(--hair); border-radius: 5px; padding: 1px 6px; }
@media (max-width: 920px) { .showcase { grid-template-columns: 1fr; } }

/* Artifact showcase — a real generated mindmap above the artifact cards */
.artifact-show { max-width: 760px; margin: 0 auto 54px; }
.af-fb {
  display: grid; place-items: center; gap: 6px; min-height: 300px;
  font-family:'Space Mono',monospace; font-size: 13px; text-align: center; line-height: 1.7;
  border: 2px dashed rgba(255,255,255,.22); border-radius: 14px;
  background: rgba(255,255,255,.04); color: rgba(255,255,255,.62);
}
.af-fb .icon { width: 30px; height: 30px; margin-bottom: 2px; }
.af-fb code { background: rgba(255,255,255,.09); border: 1px solid rgba(255,255,255,.16); border-radius: 5px; padding: 1px 6px; color: rgba(255,255,255,.85); }
.af-cap { text-align: center; font-size: 12.5px; color: rgba(255,255,255,.55); margin: 16px 0 0; }

/* CTA */
.cta-band { position: relative; background: var(--mark); border: 2px solid var(--ink); border-radius: 26px; padding: 70px 40px; text-align: center; box-shadow: 12px 12px 0 var(--ink); overflow: hidden; }
.cta-band::before { content:""; position:absolute; inset:0; opacity:.5; background-image: radial-gradient(rgba(23,22,15,.12) 1.4px, transparent 1.4px); background-size: 20px 20px; }
.cta-band h2 { position: relative; font-size: clamp(30px, 4.6vw, 52px); }
.cta-band p { position: relative; color: var(--ink-2); font-size: 18px; margin: 16px auto 30px; max-width: 520px; }
.cta-band .hero-cta { position: relative; justify-content: center; }

/* Footer */
footer { background: var(--ink); color: var(--paper); padding: 50px 0; }
.foot-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
footer .logo { color: var(--paper); }
footer .logo .mark { background: var(--mark); }
.foot-links { display: flex; gap: 24px; flex-wrap: wrap; }
.foot-links a { font-size: 14px; color: rgba(249,245,236,.72); }
.foot-links a:hover { color: #fff; }
.copy { font-family:'Space Mono',monospace; font-size: 12px; color: rgba(249,245,236,.5); }

/* Reveal */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, ::before, ::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  .hl::before { transform: scaleX(1) rotate(-1.1deg); }
}

@media (max-width: 920px) {
  section { padding: 78px 0; }
  .hero-grid, .trust-grid, .nb-grid { grid-template-columns: 1fr; gap: 44px; }
  .cols-4 { grid-template-columns: repeat(2, 1fr); }
  .cols-3 { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .menu-btn { display: block; }
  .nav-links.open { display: flex; flex-direction: column; align-items: flex-start; gap: 18px; position: absolute; top: 68px; left: 0; right: 0; background: var(--paper); border-bottom: 2px solid var(--ink); padding: 22px 26px; }
  .doodle-arrow { display: none; }
  .mock { transform: none; } .sticky { right: 6px; }
}
@media (max-width: 560px) {
  .cols-4, .cols-2 { grid-template-columns: 1fr; }
  /* Cards go horizontal — icon beside the text — to fill the width and cut empty space */
  .grid .card { display: grid; grid-template-columns: auto 1fr; column-gap: 16px; padding: 18px 20px; }
  .grid .card .ic { grid-row: 1 / span 3; align-self: start; width: 44px; height: 44px; margin-bottom: 0; }
  .grid .card h3 { grid-column: 2; margin-bottom: 5px; }
  .grid .card p { grid-column: 2; }
  .grid .card .tag { grid-column: 2; margin-top: 10px; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { justify-content: center; }
  .sticky { display: none; }
}