:root {
  color-scheme: light;
  --paper: #f5f5f0;
  --surface: #ffffff;
  --ink: #1a1a1a;
  --muted: #616874;
  --line: #d9d9d1;
  --accent: #4f46e5;
  --accent-soft: #ecebff;
  --success: #16794b;
  --warning: #a05a00;
  --danger: #b42318;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, system-ui, sans-serif;
}

a { color: inherit; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
.page { width: min(1120px, calc(100% - 2.5rem)); margin: 0 auto; }

.site-header { border-bottom: 1px solid var(--line); background: rgba(245, 245, 240, .95); }
.site-header__inner { width: min(1120px, calc(100% - 2.5rem)); min-height: 68px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: .65rem; font-family: Merriweather, Georgia, serif; font-weight: 700; text-decoration: none; }
.brand img { width: 30px; height: 30px; }
.site-header nav { display: flex; gap: 1.25rem; }
.site-header nav a { color: var(--muted); font-size: .9rem; text-decoration: none; }
.site-header nav a[aria-current="page"] { color: var(--ink); font-weight: 700; }

h1, h2 { font-family: Merriweather, Georgia, serif; }
h1 { margin: 0; max-width: 760px; font-size: clamp(2.75rem, 6.8vw, 5.25rem); line-height: 1.03; letter-spacing: -.055em; }
h2 { margin: 0; font-size: clamp(1.8rem, 4vw, 2.6rem); line-height: 1.15; letter-spacing: -.035em; }
h3 { margin: 0; }
.eyebrow { margin: 0 0 1rem; color: var(--accent); font-size: .75rem; font-weight: 700; letter-spacing: .16em; }
.lead { max-width: 720px; margin: 1.5rem 0; color: var(--muted); font-size: 1.08rem; line-height: 1.75; }

.hero { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr); gap: 4rem; align-items: center; padding: 6rem 0 5rem; }
.trust-list { display: grid; gap: .65rem; margin: 1.8rem 0 0; padding: 0; color: var(--muted); list-style: none; }
.trust-list li::before { content: "✓"; margin-right: .65rem; color: var(--success); font-weight: 700; }

.upload-card { padding: 1.3rem; border: 1px solid var(--line); border-radius: 1.2rem; background: var(--surface); box-shadow: 0 18px 45px rgba(30, 30, 20, .07); }
.drop-zone { min-height: 250px; padding: 2rem; border: 1.5px dashed #b5b5ad; border-radius: .9rem; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .7rem; text-align: center; transition: border-color .2s, background .2s; }
.drop-zone:hover, .drop-zone.is-dragging { border-color: var(--accent); background: var(--accent-soft); }
.drop-zone__icon { display: grid; place-items: center; width: 68px; height: 82px; border-radius: .55rem; background: var(--accent); color: #fff; font-size: .7rem; font-weight: 800; letter-spacing: .08em; box-shadow: 8px 8px 0 #d9d6ff; }
.drop-zone strong { margin-top: .65rem; font-size: 1.05rem; }
.drop-zone span:last-of-type { color: var(--muted); font-size: .9rem; }
.drop-zone input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }

.button { min-height: 48px; padding: .7rem 1.2rem; border: 1px solid transparent; border-radius: .75rem; display: inline-flex; align-items: center; justify-content: center; font-weight: 700; }
.button--primary { background: var(--accent); color: #fff; }
.button--primary:hover { background: #4037d5; }
.button--secondary { border-color: var(--line); background: var(--surface); color: var(--ink); }
.button:disabled { cursor: wait; opacity: .65; }
.upload-card > .button { width: 100%; margin-top: 1rem; }
.form-message { min-height: 1.3rem; margin: .8rem 0 0; color: var(--muted); font-size: .86rem; line-height: 1.45; }
.form-message.is-error { color: var(--danger); }

.report-section { padding: 5rem 0; border-top: 1px solid var(--line); background: #ecece7; }
.report-heading { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 2rem; }
.report-subtitle { margin: .8rem 0 0; color: var(--muted); }
.summary-cards { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; margin-bottom: 1rem; }
.summary-card { padding: 1.35rem; border: 1px solid var(--line); border-radius: 1rem; background: var(--surface); }
.summary-card strong { display: block; font-family: Merriweather, Georgia, serif; font-size: 2rem; }
.summary-card span { color: var(--muted); font-size: .78rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
.summary-card--errors strong { color: var(--danger); }
.summary-card--warnings strong { color: var(--warning); }

.report-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr); gap: 1rem; }
.panel { padding: 1.5rem; border: 1px solid var(--line); border-radius: 1rem; background: var(--surface); }
.panel__heading { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-bottom: 1rem; border-bottom: 1px solid #ecece6; }
.badge { padding: .35rem .65rem; border-radius: 999px; background: var(--accent-soft); color: #38345f; font-size: .72rem; font-weight: 700; }
.message-list { display: grid; gap: .8rem; margin-top: 1rem; }
.finding { padding: 1rem; border: 1px solid #e4e4de; border-radius: .8rem; }
.finding__top { display: flex; align-items: center; gap: .6rem; }
.finding__severity { padding: .25rem .45rem; border-radius: .3rem; font-size: .66rem; font-weight: 800; text-transform: uppercase; }
.finding__severity--error, .finding__severity--fatal { background: #fee4e2; color: var(--danger); }
.finding__severity--warning { background: #fff0d5; color: var(--warning); }
.finding__severity--info { background: #e6efff; color: #31589b; }
.finding code { font-size: .78rem; }
.finding__explanation { margin: .8rem 0 .35rem; line-height: 1.55; }
.finding__raw, .finding__location { margin: .35rem 0 0; color: var(--muted); font-size: .82rem; line-height: 1.5; overflow-wrap: anywhere; }
.empty-state { padding: 2rem 1rem; color: var(--success); text-align: center; }

.book-details { margin: 1rem 0 2rem; }
.book-details div { display: flex; justify-content: space-between; gap: 1rem; padding: .7rem 0; border-bottom: 1px solid #ecece6; }
.book-details dt { color: var(--muted); }
.book-details dd { margin: 0; font-weight: 600; text-align: right; overflow-wrap: anywhere; }
.subheading { margin-top: 1rem; }
.signal-list { display: grid; gap: .65rem; margin-top: 1rem; }
.signal { padding: .8rem; border-left: 3px solid var(--warning); background: #fff8e9; color: #5f471d; font-size: .84rem; line-height: 1.5; }
.signal--info { border-color: #6688c7; background: #f0f5ff; color: #31517e; }

.validation-cta { margin-top: 1rem; padding: 2rem; border-radius: 1rem; display: grid; grid-template-columns: 1fr auto; gap: 2rem; align-items: center; background: #1f1f20; color: #fff; }
.validation-cta p:not(.eyebrow) { max-width: 700px; margin: .8rem 0 0; color: #c7c7c3; line-height: 1.65; }
.validation-cta__actions { display: grid; gap: .75rem; min-width: 270px; }
.validation-cta .button--secondary { border-color: #555; background: transparent; color: #fff; }

.section { padding: 5rem 0; border-top: 1px solid var(--line); }
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; margin-top: 2rem; }
.step { padding: 1.5rem; border: 1px solid var(--line); border-radius: 1rem; background: var(--surface); }
.step > span { display: block; margin-bottom: 1rem; color: var(--accent); font-size: .8rem; font-weight: 700; }
.step p { margin: .7rem 0 0; color: var(--muted); line-height: 1.65; }
.notice { margin-top: 2rem; padding: 1.25rem 1.4rem; border-left: 4px solid var(--accent); background: var(--accent-soft); color: #38345f; line-height: 1.65; }
.faq { max-width: 860px; }
.faq details { padding: 1.2rem 0; border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; font-weight: 700; }
.faq details p { color: var(--muted); line-height: 1.7; }

.dialog { width: min(560px, calc(100% - 2rem)); padding: 0; border: 0; border-radius: 1rem; background: var(--surface); box-shadow: 0 25px 80px rgba(0, 0, 0, .28); }
.dialog::backdrop { background: rgba(20, 20, 20, .6); }
.dialog form { position: relative; padding: 2rem; }
.dialog__close { position: absolute; top: 1rem; right: 1rem; width: 38px; height: 38px; border: 0; border-radius: 50%; background: #efefea; font-size: 1.4rem; }
.dialog__intro { color: var(--muted); line-height: 1.6; }
.dialog label { display: grid; gap: .45rem; margin: 1rem 0; font-size: .9rem; font-weight: 700; }
.dialog label span { color: var(--muted); font-weight: 400; }
.dialog input, .dialog select, .dialog textarea { width: 100%; padding: .8rem .85rem; border: 1px solid var(--line); border-radius: .65rem; background: #fff; color: var(--ink); }
.dialog textarea { resize: vertical; }
.dialog .consent { grid-template-columns: auto 1fr; align-items: start; font-weight: 400; }
.dialog .consent input { width: auto; margin-top: .2rem; }
.dialog .button { width: 100%; }

footer { padding: 2.5rem 0; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 1.2rem; }

@media (max-width: 820px) {
  .hero, .report-grid, .validation-cta { grid-template-columns: 1fr; }
  .hero { padding-top: 4rem; gap: 2.5rem; }
  .summary-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .report-heading { align-items: start; flex-direction: column; }
  .validation-cta__actions { min-width: 0; }
}

@media (max-width: 620px) {
  .site-header nav a:not([aria-current="page"]) { display: none; }
  .steps { grid-template-columns: 1fr; }
  .summary-cards { grid-template-columns: 1fr 1fr; }
  .page, .site-header__inner { width: min(100% - 1.25rem, 1120px); }
}