/* Premed Mentor — shared styles */
:root {
  --ink: #5a2610;
  --ink-soft: #7d5641;
  --paper: #fff7ea;
  --card: #fffdf9;
  --accent: #a9521b;
  --accent-dark: #833d10;
  --line: #f0dcc0;
  --ok: #2f7d4f;
  --max: 1080px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 17px;
}
h1, h2, h3 { font-family: Fraunces, Georgia, serif; line-height: 1.15; margin: 0 0 .5em; }
a { color: var(--accent); }
img { max-width: 100%; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 760px; }

/* Header */
header.nav { position: sticky; top: 0; background: rgba(255,247,234,.94); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); z-index: 20; }
header.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { font-family: Fraunces, serif; font-weight: 700; font-size: 1.25rem; color: var(--ink); text-decoration: none; white-space: nowrap; }
.brand span { color: var(--accent); }
nav.links { display: flex; align-items: center; gap: 22px; margin-left: auto; }
nav.links a { color: var(--ink-soft); text-decoration: none; font-weight: 500; font-size: .95rem; white-space: nowrap; }
nav.links a:hover, nav.links a[aria-current="page"] { color: var(--accent); }
.nav-callout.btn { background: var(--ink); color: #fff; white-space: nowrap; flex: none; }
.nav-updates.btn { color: #fff; white-space: nowrap; flex: none; }
nav.links a.menu-only { display: none; }
.nav-callout.btn:hover { background: #3f1909; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.menu-btn { display: none; background: none; border: 1px solid var(--line); border-radius: 8px; padding: 6px 8px; font: inherit; color: var(--ink); cursor: pointer; line-height: 0; }

/* Buttons */
.btn { display: inline-block; background: var(--accent); color: #fff; padding: 13px 24px; border-radius: 999px; text-decoration: none; font-weight: 600; transition: background .2s; border: 0; cursor: pointer; font-size: 1rem; font-family: inherit; }
.btn:hover { background: var(--accent-dark); }
.btn:disabled { opacity: .6; cursor: wait; }
.btn.ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--ink); }
.btn.ghost:hover { background: var(--ink); color: #fff; }
.btn.small { padding: 8px 16px; font-size: .9rem; }

/* Hero */
.hero { padding: 80px 0 72px; background: linear-gradient(180deg, #fccf86 0%, #fde3b5 55%, var(--paper) 100%); }
.hero .wrap { display: grid; grid-template-columns: 1.2fr .8fr; gap: 56px; align-items: center; }
.eyebrow { text-transform: uppercase; letter-spacing: .14em; font-size: .8rem; font-weight: 600; color: var(--accent); margin-bottom: 14px; }
.hero h1 { font-size: clamp(2.4rem, 5vw, 3.8rem); }
.lead { font-size: 1.2rem; color: var(--ink-soft); max-width: 34em; }
.pill { display: inline-block; margin-left: 10px; padding: 3px 10px; border-radius: 999px; background: var(--accent); color: #fff; letter-spacing: .08em; font-size: .72rem; vertical-align: 1px; }
.publisher { display: inline-flex; align-items: center; gap: 14px; margin-top: 28px; padding: 10px 18px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); text-decoration: none; color: var(--ink-soft); font-size: .85rem; font-weight: 500; transition: border-color .15s; }
.publisher:hover { border-color: var(--accent); }
.publisher img { height: 30px; width: auto; filter: brightness(0); opacity: .85; }
.ctas { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; }
.page-head { padding: 64px 0 24px; }
.page-head h1 { font-size: clamp(2.1rem, 4.5vw, 3.2rem); }

/* Book cover: a 3D book (front, spine, page edges, back) that turns on hover, or on tap on touch screens */
.book-wrap { --w: min(300px, 74vw); --t: 56px; perspective: 1600px; display: flex; justify-content: center; padding: 10px 0 20px; cursor: pointer; -webkit-tap-highlight-color: transparent; }
.book { position: relative; width: var(--w); height: calc(var(--w) * 1.5); transform-style: preserve-3d; transform: rotateY(0deg); transition: transform .8s cubic-bezier(.2,.7,.2,1); }
.book > * { position: absolute; }
.book img { inset: 0; width: 100%; height: 100%; border-radius: 2px 5px 5px 2px; transform: translateZ(calc(var(--t) / 2)); }
.book .back { inset: 0; background: #e6a457; border-radius: 2px 5px 5px 2px; transform: translateZ(calc(var(--t) / -2)); box-shadow: 0 30px 50px -18px rgba(90,38,16,.55); }
.book .spine { top: 0; left: calc(var(--t) / -2); width: var(--t); height: 100%; transform: rotateY(-90deg); background: linear-gradient(90deg, #c97a2f, #f0b764 45%, #d8913f); }
.book .pages { top: 4px; left: calc(var(--w) - var(--t) / 2 - 3px); width: calc(var(--t) - 2px); height: calc(100% - 8px); transform: rotateY(90deg); background: repeating-linear-gradient(90deg, #fffaf0 0 2px, #eadcc6 2px 3px); }
.book-wrap:hover .book, .book-wrap.turned .book { transform: rotateY(-38deg); }
@media (hover: none) { .book-wrap:hover .book { transform: rotateY(0deg); } .book-wrap.turned .book { transform: rotateY(-38deg); } }
@media (prefers-reduced-motion: reduce) { .book { transition: none; } }

/* Sections */
section { padding: 72px 0; }
section.alt { background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
section h2 { font-size: clamp(1.8rem, 3.5vw, 2.5rem); }
.section-lead { color: var(--ink-soft); max-width: 40em; margin-bottom: 40px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid.two { grid-template-columns: repeat(2, 1fr); }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 28px; }
.card .num { font-family: Fraunces, serif; color: var(--accent); font-size: 1.6rem; font-weight: 700; }
.card h3 { font-size: 1.2rem; margin-top: 6px; }
.card p { margin: 0; color: var(--ink-soft); font-size: .98rem; }

.cover-note { text-align: center; color: var(--ink-soft); font-size: .8rem; font-style: italic; margin: 4px 0 0; }

/* Key topics */
.topics { columns: 2; column-gap: 48px; margin: 0; padding: 0; list-style: none; }
.topics li { break-inside: avoid; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 1.02rem; }
@media (max-width: 1000px) {
  .menu-btn { display: inline-block; }
  .nav-callout { margin-left: auto; padding: 7px 12px; font-size: .85rem; }
  .nav-updates { padding: 7px 12px; font-size: .85rem; }
  header.nav .wrap { gap: 10px; }
  .brand { font-size: 1.1rem; }
  nav.links { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--paper); border-bottom: 1px solid var(--line); flex-direction: column; align-items: flex-start; padding: 16px 20px; gap: 14px; }
  nav.links.open { display: flex; }
}
@media (max-width: 860px) { .topics { columns: 1; } }

/* Store buttons */
.stores { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.store { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; min-height: 120px; padding: 20px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; text-decoration: none; color: var(--ink); font-weight: 600; font-size: .95rem; transition: transform .15s, box-shadow .15s, border-color .15s; }
.store:hover { transform: translateY(-2px); box-shadow: 0 12px 24px -12px rgba(90,38,16,.25); border-color: var(--accent); }
.store img { height: 40px; width: auto; max-width: 170px; object-fit: contain; }
.store small { color: var(--ink-soft); font-weight: 400; font-size: .82rem; }
.note-small { color: var(--ink-soft); font-size: .85rem; margin-top: 16px; }

/* Authors */
.author-card { display: grid; grid-template-columns: 120px 1fr; gap: 28px; align-items: start; }
.avatar { width: 120px; height: 120px; border-radius: 50%; background: var(--line); display: grid; place-items: center; font-family: Fraunces, serif; font-size: 2.2rem; color: var(--ink-soft); }
img.avatar { object-fit: cover; display: block; }
.avatar.small { width: 72px; height: 72px; margin-bottom: 14px; }
.author-card h3 { font-size: 1.5rem; margin-bottom: .2em; }
.author-card .role { color: var(--accent); font-weight: 600; font-size: .9rem; margin-bottom: 12px; }
.author-card p { color: var(--ink-soft); margin: 0 0 12px; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.chip { display: inline-flex; align-items: center; gap: 8px; padding: 7px 14px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); color: var(--ink); text-decoration: none; font-size: .9rem; font-weight: 500; cursor: pointer; font-family: inherit; }
.chip:hover, .chip[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); }
.chip svg { width: 16px; height: 16px; fill: currentColor; }

/* Forms */
.caveat { background: #fff6e0; border: 1px solid #f1dca6; border-radius: 10px; padding: 14px 16px; font-size: .92rem; color: #5c4300; }
.form { display: grid; gap: 18px; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form label { display: block; font-weight: 600; font-size: .92rem; margin-bottom: 6px; }
.form .opt { color: var(--ink-soft); font-weight: 400; }
.form input[type=text], .form input[type=email], .form input[type=password], .form select, .form textarea {
  width: 100%; padding: 12px 14px; border: 1px solid #e3c9a6; border-radius: 10px; font: inherit; background: #fff; color: var(--ink);
}
.form textarea { min-height: 160px; resize: vertical; }
.form input:focus, .form select:focus, .form textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: .92rem; color: var(--ink-soft); }
.check input { margin-top: 4px; width: 18px; height: 18px; flex: none; }
.check label { font-weight: 400; margin: 0; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.status { padding: 14px 16px; border-radius: 10px; font-size: .95rem; display: none; }
.status.show { display: block; }
.status.ok { background: #e8f4ec; color: var(--ok); }
.status.err { background: #fbeaec; color: var(--accent-dark); }
.form-card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 36px; }

/* Signup band */
.signup { background: var(--ink); color: #fff; border-radius: 20px; padding: 56px; text-align: center; }
.signup h2 { color: #fff; }
.signup p { color: rgba(255,255,255,.82); max-width: 36em; margin: 0 auto 24px; }
.signup .form { max-width: 520px; margin: 0 auto; text-align: left; }
.signup .inline { display: flex; gap: 12px; flex-wrap: wrap; }
.signup .inline input { flex: 1 1 220px; border: 0; border-radius: 999px; padding: 13px 20px; }
.signup .check { color: rgba(255,255,255,.75); }
.signup .check a { color: #fff; }

/* Resources */
.filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.res-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.res { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 24px; display: flex; flex-direction: column; gap: 8px; }
.res .meta { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.tag { font-size: .85rem; color: var(--ink-soft); }
.tag + .tag::before { content: "\00b7"; margin-right: 8px; }
.tag.aff { color: #8a5a00; }
.res h3 { font-size: 1.15rem; margin: 4px 0 0; }
.res h3 a { color: var(--ink); text-decoration: none; }
.res h3 a:hover { color: var(--accent); }
.res p { margin: 0; color: var(--ink-soft); font-size: .96rem; }
.res .go { margin-top: auto; padding-top: 8px; font-weight: 600; font-size: .92rem; }
.disclosure-box { border-top: 1px solid var(--line); padding-top: 20px; font-size: .9rem; color: var(--ink-soft); }

/* Prose pages */
.prose h2 { font-size: 1.6rem; margin-top: 2em; }
.prose h3 { font-size: 1.2rem; margin-top: 1.6em; }
.prose p, .prose li { color: #2b3550; }
.prose .updated { color: var(--ink-soft); font-size: .9rem; }

/* Footer */
footer.site { padding: 48px 0 32px; color: var(--ink-soft); font-size: .92rem; border-top: 1px solid var(--line); background: var(--card); }
footer.site .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
footer.site h4 { font-family: Inter, sans-serif; font-size: .8rem; text-transform: uppercase; letter-spacing: .12em; color: var(--ink); margin: 0 0 12px; }
footer.site ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
footer.site a { color: var(--ink-soft); text-decoration: none; }
footer.site a:hover { color: var(--accent); }
footer.site .social { display: flex; gap: 10px; margin-top: 14px; }
footer.site .social a { width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--line); display: grid; place-items: center; }
footer.site .social svg { width: 17px; height: 17px; fill: currentColor; }
footer.site .legal { margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: .85rem; }
.linkish { background: none; border: 0; padding: 0; font: inherit; color: var(--ink-soft); cursor: pointer; text-decoration: underline; }

/* Cookie banner */
.cookie { position: fixed; left: 16px; right: 16px; bottom: 16px; max-width: 760px; margin: 0 auto; background: var(--ink); color: #fff; border-radius: 14px; padding: 16px 20px; display: none; gap: 16px; align-items: center; justify-content: space-between; z-index: 50; box-shadow: 0 20px 40px -10px rgba(0,0,0,.35); font-size: .92rem; }
.cookie.show { display: flex; }
.cookie p { margin: 0; color: rgba(255,255,255,.88); }
.cookie a { color: #fff; }
.cookie .actions { display: flex; gap: 10px; flex: none; }
.cookie .btn.ghost { color: #fff; border-color: rgba(255,255,255,.6); }

@media (max-width: 860px) {
  .hero .wrap, .grid, .grid.two, .res-list, footer.site .cols { grid-template-columns: 1fr; }
  .stores { grid-template-columns: repeat(2, 1fr); }
  .hero { padding: 48px 0; }
  .author-card { grid-template-columns: 1fr; }
  .signup, .form-card { padding: 32px 20px; }
  .form .row { grid-template-columns: 1fr; }
  .cookie { flex-direction: column; align-items: stretch; }
}
@media (max-width: 480px) {
  .nav-updates { display: none; }
  nav.links.open a.menu-only { display: block; }
}
@media (max-width: 420px) { .stores { grid-template-columns: 1fr; } }