:root {
  --bg: #181818;
  --bar: #131313;
  --surface: #1f1f1f;
  --surface-2: #252525;
  --surface-hover: #2b2b2b;
  --ink: #ffffff;
  --muted: #8d949a;
  --line: #303030;
  --accent: #339cff;
  --accent-deep: #218bea;
  --success: #40c977;
  --danger: #fa423e;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.5 "Segoe UI", Arial, sans-serif; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 680px; margin-bottom: 22px; font-size: clamp(42px, 5vw, 68px); line-height: 1.04; letter-spacing: 0; }
h2 { margin-bottom: 14px; font-size: 32px; line-height: 1.15; }
h3 { margin-bottom: 8px; font-size: 17px; }

.site-header {
  position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between;
  height: 60px; padding: 0 max(24px, calc((100vw - 1240px) / 2)); background: var(--bar); border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--accent); font-size: 14px; letter-spacing: .08em; }
.brand img { width: 28px; height: 28px; object-fit: contain; }
nav { display: flex; align-items: center; gap: 22px; color: var(--muted); font-size: 14px; }
nav a:hover { color: var(--ink); }
.account-link { padding: 7px 12px; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 6px; font-size: 14px; }
.account-link:hover { border-color: var(--accent); }

.eyebrow { margin: 0 0 14px; color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: .12em; }
.lead { max-width: 590px; color: var(--muted); font-size: 20px; }
.microcopy { margin-top: 14px; color: #777d86; font-size: 13px; }
.button {
  display: inline-flex; align-items: center; justify-content: center; min-height: 40px; padding: 9px 15px;
  color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 6px;
  font: inherit; font-size: 14px; font-weight: 650; cursor: pointer; transition: background .14s ease, border-color .14s ease, color .14s ease;
}
.button:hover { background: var(--surface-hover); border-color: #484848; }
.button.primary { color: #fff; background: var(--accent); border-color: var(--accent); }
.button.primary:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
.button.secondary { background: var(--surface); }

.hero { display: grid; grid-template-columns: minmax(0, .88fr) minmax(460px, 1.12fr); align-items: center; gap: 56px; min-height: 650px; max-width: 1240px; margin: 0 auto; padding: 88px 24px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.product-visual { min-height: 420px; overflow: hidden; background: var(--bg); border: 0; border-radius: 7px; box-shadow: 0 24px 70px rgba(0, 0, 0, .3); }
.visual-topbar { display: flex; align-items: center; justify-content: space-between; height: 40px; padding: 0 15px; color: var(--muted); background: var(--bar); border-bottom: 1px solid var(--line); font-size: 11px; }
.visual-topbar span:first-child { color: var(--accent); font-weight: 700; letter-spacing: .1em; }
.visual-body { display: flex; height: 378px; }
.visual-body aside { display: flex; flex-direction: column; align-items: center; gap: 18px; width: 48px; padding-top: 20px; background: var(--bar); border-right: 1px solid var(--line); }
.visual-body aside span { width: 18px; height: 18px; border: 1px solid #666; border-radius: 4px; }
.clinical-grid { display: grid; flex: 1; grid-template-columns: 1fr 1fr; gap: 2px; background: var(--line); }
.scan { position: relative; min-height: 0; overflow: hidden; background: #1f1f1f; }
.scan b { position: absolute; z-index: 2; top: 8px; left: 10px; color: #d0d4d9; font-size: 11px; font-weight: 600; }
.scan i { position: absolute; inset: 18%; border: 1px solid rgba(51, 156, 255, .65); border-radius: 50%; opacity: .85; }
.scan i::before, .scan i::after { position: absolute; content: ""; background: rgba(51, 156, 255, .85); }
.scan i::before { top: -15%; left: 50%; width: 1px; height: 130%; }
.scan i::after { top: 50%; left: -15%; width: 130%; height: 1px; }
.coronal i { border-radius: 46% 54% 52% 48%; }
.sagittal i { transform: rotate(24deg); }
.volume i { border: 0; background: radial-gradient(ellipse at center, #d9dee5 0 7%, #777f8a 8% 20%, #29303a 21% 48%, transparent 50%); transform: rotate(-10deg); }

.section-wrap { max-width: 1240px; margin: 0 auto; padding: 90px 24px; }
.features, .beta, .download { border-top: 0; }
.section-intro { max-width: 580px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 38px; }
.feature-grid article, .account-card, .admin-card, .terms-card { background: var(--surface); border: 0; border-radius: 7px; }
.feature-grid article { padding: 24px; }
.feature-grid article:hover { background: var(--surface-2); }
.feature-grid p, .beta-copy > p, .download > p, .account-card > p { color: var(--muted); }
.beta { display: grid; grid-template-columns: .8fr 1.2fr; gap: 64px; }
.beta-form, .profile-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-content: start; }
.beta-form label, .account-form label { display: grid; gap: 6px; color: var(--muted); font-size: 13px; }
.beta-form input, .account-form input {
  width: 100%; padding: 10px 11px; color: var(--ink); background: var(--bar); border: 1px solid var(--line); border-radius: 5px; font: inherit;
}
.beta-form input:focus, .account-form input:focus { outline: 2px solid rgba(51, 156, 255, .35); border-color: var(--accent); }
.beta-form button, .beta-form #form-status { grid-column: 1 / -1; }
.beta-form #form-status, #auth-status, #profile-status, #admin-status { min-height: 22px; margin: 0; color: var(--muted); font-size: 14px; }
.success, #auth-status.success, #profile-status.success, .beta-form #form-status.success, #admin-status.success { color: var(--success) !important; }
.error, #auth-status.error, #profile-status.error, .beta-form #form-status.error, #admin-status.error { color: #ff8d8d !important; }
.beta-consent { grid-column: 1 / -1; color: var(--muted) !important; font-size: 13px !important; }
.consent-field { grid-template-columns: auto 1fr !important; align-items: start; line-height: 1.35; }
.consent-field input { width: 16px; height: 16px; margin: 1px 0 0; accent-color: var(--accent); }
.consent-field a { color: #8cc6ff; text-decoration: underline; text-underline-offset: 2px; }
.cep-help, .password-help { grid-column: 1 / -1; min-height: 18px; margin: 0; color: #89909a; font-size: 12px; }
.download { display: grid; grid-template-columns: 1fr 1fr auto; align-items: center; gap: 30px; }
.download p { margin: 0; color: var(--muted); }
footer { display: flex; gap: 18px; max-width: 1240px; margin: 0 auto; padding: 28px 24px; color: var(--muted); border-top: 0; font-size: 13px; }
footer span:first-child { color: var(--accent); font-weight: 700; letter-spacing: .08em; }
footer a { margin-left: auto; }

.account-page, .admin-page { min-height: 100vh; }
.account-main { display: grid; min-height: calc(100vh - 60px); padding: 32px 24px; place-items: center; }
.account-card { width: min(100%, 540px); padding: 38px; }
.account-card h1 { font-size: 38px; }
.account-description { color: var(--muted); }
.auth-tabs { display: flex; gap: 4px; padding: 4px; margin: 28px 0 20px; background: var(--bar); border: 1px solid var(--line); border-radius: 6px; }
.tab { flex: 1; padding: 9px; color: var(--muted); background: transparent; border: 0; border-radius: 4px; font: inherit; cursor: pointer; }
.tab.active { color: #fff; background: var(--accent); font-weight: 650; }
.account-form { display: grid; gap: 14px; }
.hidden { display: none !important; }
.account-status { display: flex; justify-content: space-between; padding: 14px 0; color: var(--muted); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.account-status strong { color: var(--success); }
.profile-form { padding-top: 22px; margin-top: 28px; border-top: 1px solid var(--line); }
.profile-form h2 { margin: 0; font-size: 21px; }

.header-actions { display: flex; align-items: center; gap: 12px; }
.header-account, .admin-summary { color: var(--muted); font-size: 13px; }
.admin-main { width: min(100%, 1240px); margin: 0 auto; padding: 58px 24px 90px; }
.admin-intro { max-width: 650px; margin-bottom: 32px; }
.admin-intro h1 { margin-bottom: 12px; font-size: 48px; }
.admin-intro > p:last-child { color: var(--muted); font-size: 17px; }
.admin-workspace { display: grid; gap: 18px; }
.admin-toolbar, .admin-card-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.admin-card { padding: 24px; }
.admin-card h2 { margin: 0; font-size: 22px; }
.filter-group, .table-actions { display: flex; flex-wrap: wrap; gap: 6px; }
.filter-button { padding: 7px 10px; color: var(--muted); background: var(--bar); border: 1px solid var(--line); border-radius: 5px; font: inherit; font-size: 13px; cursor: pointer; }
.filter-button.active { color: #fff; background: var(--accent); border-color: var(--accent); font-weight: 650; }
.admin-table-wrap { margin-top: 22px; overflow-x: auto; }
.admin-table { width: 100%; min-width: 760px; border-collapse: collapse; }
.admin-table th { padding: 0 12px 10px; color: #949ba5; text-align: left; font-size: 12px; font-weight: 600; letter-spacing: .04em; }
.admin-table td { padding: 13px 12px; color: var(--muted); border-top: 1px solid var(--line); font-size: 14px; vertical-align: middle; }
.admin-table td:first-child strong, .admin-table td:first-child span { display: block; }
.admin-table td:first-child strong { color: var(--ink); font-weight: 600; }
.admin-table td:first-child span { margin-top: 2px; color: #8b929c; font-size: 13px; }
.status-chip { display: inline-flex; align-items: center; padding: 3px 8px; border-radius: 999px; font-size: 12px; font-weight: 650; }
.status-chip.pending { color: #ffd277; background: rgba(255, 194, 74, .15); }
.status-chip.active { color: #62d998; background: rgba(64, 201, 119, .15); }
.status-chip.approved { color: #62d998; background: rgba(64, 201, 119, .15); }
.status-chip.disabled { color: #ff9b97; background: rgba(250, 66, 62, .15); }
.status-chip.rejected { color: #ff9b97; background: rgba(250, 66, 62, .15); }
.button.compact { min-height: 32px; padding: 6px 10px; font-size: 12px; }
.empty-cell { padding: 28px !important; color: #818892 !important; text-align: center; }

.terms-main { width: min(100%, 860px); margin: 0 auto; padding: 56px 24px 90px; }
.terms-card { padding: 38px; }
.terms-card h1 { margin-bottom: 8px; font-size: 42px; }
.terms-card h2 { margin: 30px 0 8px; font-size: 21px; }
.terms-card p { color: var(--muted); }
.terms-card .terms-version { color: #838b95; font-size: 13px; }
.terms-card .terms-note { padding: 14px; background: rgba(51, 156, 255, .08); border-left: 2px solid var(--accent); }

@media (max-width: 800px) {
  .site-header { padding: 0 18px; }
  nav a:not(.account-link) { display: none; }
  .hero { grid-template-columns: 1fr; gap: 38px; min-height: 0; padding: 60px 24px; }
  .product-visual { min-height: 330px; }
  .visual-body { height: 288px; }
  .feature-grid, .beta, .download, .beta-form, .profile-grid { grid-template-columns: 1fr; }
  .beta { gap: 28px; }
  .download { gap: 16px; }
  .section-wrap { padding: 64px 24px; }
  footer { flex-wrap: wrap; }
  footer a { margin-left: 0; }
  .admin-main { padding: 42px 18px 64px; }
  .admin-intro h1 { font-size: 38px; }
  .admin-card { padding: 18px; }
  .admin-toolbar, .admin-card-heading { align-items: flex-start; flex-direction: column; }
  .header-account { display: none; }
}