:root {
  --navy: #073B73;
  --blue: #0B4F8A;
  --green: #16A34A;
  --green-soft: #EAF7EF;
  --bg: #F7F9FB;
  --surface: #FFFFFF;
  --text: #172033;
  --muted: #5B6678;
  --border: #E2E8F0;
  --danger: #B42318;
  --danger-soft: #FEF3F2;
  --warn: #B54708;
  --warn-soft: #FFFAEB;
  --shadow: 0 1px 2px rgba(23, 32, 51, 0.04), 0 8px 24px rgba(7, 59, 115, 0.06);
  --radius: 12px;
  --radius-sm: 8px;
  --font-head: "Montserrat", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 80px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--blue);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
a:hover { color: var(--navy); }

.wrap {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

/* Header */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 30;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: 10px 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}
.brand:hover { color: inherit; }
.brand-logo {
  display: block;
  height: 118px;
  width: auto;
  max-width: min(460px, 82vw);
  object-fit: contain;
  object-position: left center;
}
.mark {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--navy);
  color: #fff;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  position: relative;
}
.mark svg { display: block; }
.mark-check {
  position: absolute;
  right: -3px;
  bottom: -3px;
  width: 16px;
  height: 16px;
  background: var(--green);
  border: 2px solid var(--surface);
  border-radius: 50%;
  display: grid;
  place-items: center;
}
.mark-check svg { width: 9px; height: 9px; }
.brand-copy small {
  display: block;
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1.3;
}
.brand-copy strong {
  display: block;
  color: var(--navy);
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.2;
}
.site-header nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.site-header nav a {
  margin: 0;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}
.site-header nav a:hover {
  color: var(--navy);
  background: var(--bg);
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--navy);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 var(--space-2);
}
h1 {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
}
h2 {
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 700;
  margin-top: var(--space-5);
}
h3 {
  font-size: clamp(20px, 2.4vw, 24px);
  font-weight: 600;
}
.hero {
  padding: var(--space-5) 0 var(--space-2);
}
.lede {
  max-width: 46rem;
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.65;
}

/* Calculator */
.calc-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: var(--space-3);
  margin: var(--space-3) 0;
}
.calc-head {
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
  align-items: flex-start;
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-3);
  border-bottom: 1px solid var(--border);
}
.calc-head h2 {
  margin: 0;
  color: var(--navy);
}
.calc-actions {
  margin-top: 18px;
}
.calc-head p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
}
.grid-form {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
}
@media (max-width: 900px) {
  .grid-form { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 800px) {
  .site-header nav { display: none; }
  .brand-logo {
    height: 96px;
    max-width: 90vw;
  }
}
@media (max-width: 560px) {
  .grid-form { grid-template-columns: 1fr; }
  .calc-head { flex-direction: column; }
}

label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

select,
input[type="text"],
input[type="number"],
input[type="password"],
textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
textarea { min-height: 96px; }
select:focus,
input:focus,
textarea:focus {
  border-color: var(--navy);
  box-shadow: 0 0 0 3px rgba(7, 59, 115, 0.12);
}

.unit-toggle {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--surface);
}
.unit-toggle button {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 10px 16px;
  min-height: 40px;
  cursor: pointer;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
}
.unit-toggle button.active {
  background: var(--navy);
  color: #fff;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 12px 20px;
  border: 0;
  border-radius: var(--radius-sm);
  background: var(--green);
  color: #fff;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s ease;
}
.btn:hover {
  background: #14853f;
  color: #fff;
}
.btn.copper,
.btn.primary { background: var(--green); }
.btn.copper:hover,
.btn.primary:hover { background: #14853f; color: #fff; }
.btn.danger { background: var(--danger); }
.btn.danger:hover { background: #912018; color: #fff; }
.btn.ghost {
  background: var(--surface);
  color: var(--navy);
  border: 1px solid var(--border);
}
.btn.ghost:hover {
  background: var(--bg);
  color: var(--navy);
  border-color: #cbd5e1;
}

/* Panels */
.notice,
.disclaimer,
.source-box,
.result,
.warn {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-2) 18px;
  margin: var(--space-2) 0;
  background: var(--surface);
}
.notice {
  background: var(--bg);
  color: var(--muted);
  font-size: 14px;
}
.disclaimer {
  background: var(--bg);
}
.disclaimer h3 {
  margin-bottom: 8px;
}
.warn {
  background: var(--warn-soft);
  border-color: #f9dbaf;
  color: var(--text);
}
.warn .status.bad { color: var(--warn); }

/* Result hierarchy */
.result {
  background: var(--green-soft);
  border-color: #c7e9d3;
  padding: var(--space-3);
}
.result .status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(22, 163, 74, 0.12);
  color: var(--green);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.result .status .icon-check {
  width: 16px;
  height: 16px;
  display: inline-grid;
  place-items: center;
  background: var(--green);
  color: #fff;
  border-radius: 50%;
  flex-shrink: 0;
}
.result .status .icon-check svg {
  width: 10px;
  height: 10px;
}
.result-label,
.result > p:not(.status):not(.time) {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.result .time {
  margin: 0;
  color: var(--navy);
  font-family: var(--font-body);
  font-size: clamp(36px, 5vw, 48px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
}
.result--miss {
  background: var(--danger-soft);
  border-color: #fecdca;
}
.result--miss .status {
  background: rgba(180, 35, 24, 0.1);
  color: var(--danger);
}

.kvs {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 10px 16px;
  margin: var(--space-2) 0;
  padding: var(--space-2);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
}
.kvs dt {
  color: var(--muted);
  font-weight: 500;
}
.kvs dd {
  margin: 0;
  color: var(--text);
  font-weight: 600;
}
.hidden { display: none !important; }

/* Source blocks */
.source-box {
  position: relative;
  padding-left: 52px;
  border-left: 3px solid var(--green);
}
.source-box::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 18px;
  width: 24px;
  height: 24px;
  background:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23073B73' stroke-width='1.8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M7 3.75h7.5L19.5 8.75V20.25a.75.75 0 0 1-.75.75H7.75a.75.75 0 0 1-.75-.75V4.5a.75.75 0 0 1 .75-.75Z'/%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M14.25 3.75V8.5h4.75M9 12.75h6M9 16.25h6'/%3E%3C/svg%3E")
    center / contain no-repeat;
}
.source-box h3 {
  margin: 0 0 8px;
}
.source-box a {
  font-weight: 600;
  text-decoration: none;
}
.source-box a:hover { text-decoration: underline; }

/* Tables */
table.data {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  font-family: var(--font-body);
  font-size: 14px;
}
table.data th,
table.data td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
}
table.data th {
  background: var(--navy);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
table.data tr:last-child td { border-bottom: 0; }
table.data tr.endpoint td {
  background: #eef4fa;
}
table.data tr.hot td {
  background: var(--green-soft);
  font-weight: 600;
}
.mono {
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 13px;
  color: var(--muted);
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-2);
}
.card {
  display: block;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  background: var(--surface);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.card:hover {
  border-color: #cbd5e1;
  box-shadow: var(--shadow);
  color: inherit;
}
.card strong {
  display: block;
  margin-bottom: 6px;
  color: var(--navy);
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
}
.card span {
  display: block;
  margin-top: 8px;
  color: var(--navy);
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 700;
}

/* Sections / footer */
main.wrap > section + section {
  margin-top: 8px;
}
footer.site {
  margin-top: var(--space-6);
  padding: var(--space-4) 0 var(--space-6);
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
  background: var(--surface);
}
footer.site .wrap > p { margin-top: var(--space-2); }

.faq details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 0;
  margin-bottom: 10px;
}
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 14px 16px;
  color: var(--navy);
  font-family: var(--font-head);
  font-weight: 600;
}
.faq details[open] summary {
  border-bottom: 1px solid var(--border);
}
.faq details > *:not(summary) {
  padding: 0 16px 16px;
  color: var(--muted);
}
.faq summary::-webkit-details-marker { display: none; }

.breadcrumbs {
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
}
.breadcrumbs a {
  color: var(--muted);
  text-decoration: none;
}
.breadcrumbs a:hover { color: var(--navy); }

.nearest a {
  display: inline-flex;
  margin: 0 8px 8px 0;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--navy);
  font-weight: 600;
  text-decoration: none;
}
.nearest a:hover { border-color: var(--navy); }

.status {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.ok { color: var(--green); }
.bad { color: var(--danger); }

/* SEO / content pages */
.result .kvs {
  margin: var(--space-2) 0 0;
  background: transparent;
  border: 0;
  padding: 0;
}
.result .kvs .time,
.result .kvs dd.time {
  display: block;
  color: var(--navy);
  font-family: var(--font-body);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
}
.result .kvs dt:has(+ dd.time) {
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* Admin */
.admin-shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}
.admin-nav {
  background: var(--navy);
  color: #dbe7f3;
  padding: 24px 16px;
}
.admin-nav p {
  margin: 0 0 16px;
  color: #fff;
  font-family: var(--font-head);
}
.admin-nav a {
  display: block;
  color: #c5d6e8;
  text-decoration: none;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
}
.admin-nav a:hover,
.admin-nav a.active {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}
.admin-nav .btn.ghost {
  margin-top: 16px;
  width: 100%;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.25);
  background: transparent;
}
.admin-main {
  padding: var(--space-3);
  background: var(--bg);
}
.flash {
  background: var(--green-soft);
  border: 1px solid #c7e9d3;
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-bottom: var(--space-2);
}
.login-box {
  max-width: 420px;
  margin: 12vh auto;
  background: var(--surface);
  padding: var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

@media (max-width: 800px) {
  .admin-shell { grid-template-columns: 1fr; }
  .kvs { grid-template-columns: 1fr; gap: 4px; }
  .kvs dt { margin-top: 8px; }
}