:root {
  --bg: #04101b;
  --panel: #071827;
  --panel-soft: #092034;
  --line: #164461;
  --muted: #8fb7c9;
  --text: #f4fbff;
  --yellow: #e7ad27;
  --gold: #f2c24f;
  --cyan: #20d4dc;
  --green: #20d99a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Segoe UI, Arial, sans-serif;
}

.page-header,
.page-footer {
  border-color: var(--line);
  background: #061326;
  padding: 18px clamp(18px, 4vw, 48px);
}

.page-header {
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.page-language {
  min-width: 132px;
  padding: 7px 10px;
  display: grid;
  gap: 3px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(7, 30, 47, .96);
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}

.page-language select {
  width: 100%;
  padding: 0 22px 0 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font: 800 13px "Segoe UI", Arial, sans-serif;
  cursor: pointer;
}

.page-language option {
  background: #082033;
  color: var(--text);
}

.brand img {
  display: block;
  width: min(330px, 100%);
  height: auto;
  filter: drop-shadow(0 0 1px rgba(255, 255, 255, .95)) drop-shadow(0 0 7px rgba(59, 215, 232, .24));
}

.page-content {
  width: min(1080px, calc(100% - 36px));
  margin: 0 auto;
  padding: 42px 0;
}

.content-panel {
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--panel);
  box-shadow: 0 18px 44px rgba(0, 0, 0, .24), 0 0 28px rgba(32, 212, 220, .06);
  padding: clamp(20px, 4vw, 36px);
}

.eyebrow {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(28px, 5vw, 42px);
  letter-spacing: 0;
}

h2 {
  margin: 34px 0 12px;
  padding-top: 6px;
  color: #fff;
  font-size: clamp(22px, 3vw, 28px);
}

h3 {
  margin: 22px 0 8px;
  color: #dcfaff;
  font-size: 19px;
}

p {
  margin: 0 0 16px;
  color: #d8fbff;
  font-size: 16px;
  line-height: 1.65;
}

p:last-child {
  margin-bottom: 0;
}

.lead {
  color: #ecfdff;
  font-size: clamp(17px, 2.1vw, 20px);
  line-height: 1.62;
}

.updated {
  margin-top: -3px;
  color: var(--muted);
  font-size: 14px;
}

.section-nav {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin: 26px 0 8px;
  padding: 16px;
  border: 1px solid rgba(32, 212, 220, .24);
  border-radius: 9px;
  background: rgba(5, 28, 45, .72);
}

.section-nav a {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0;
}

.info-card,
.rule-card {
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--panel-soft);
  padding: 18px;
}

.info-card h3,
.rule-card h3 {
  margin-top: 0;
}

.info-card p,
.rule-card p {
  margin-bottom: 0;
  font-size: 15px;
}

.rule-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0;
}

.rule-card.support {
  border-color: rgba(32, 212, 220, .5);
}

.rule-card.resistance {
  border-color: rgba(242, 194, 79, .52);
}

.callout {
  margin: 20px 0;
  border-left: 4px solid var(--cyan);
  border-radius: 7px;
  background: rgba(32, 212, 220, .08);
  padding: 16px 18px;
}

.callout.warning {
  border-left-color: var(--yellow);
  background: rgba(231, 173, 39, .09);
}

.callout strong {
  color: #fff;
}

ul,
ol {
  margin: 8px 0 18px;
  padding-left: 24px;
  color: #d8fbff;
  font-size: 16px;
  line-height: 1.65;
}

li + li {
  margin-top: 7px;
}

.formula {
  margin: 14px 0;
  overflow-x: auto;
  border: 1px solid rgba(32, 212, 220, .34);
  border-radius: 8px;
  background: #04131f;
  padding: 15px;
  color: #f6fdff;
  font-family: Consolas, "Courier New", monospace;
  font-size: 15px;
  line-height: 1.6;
  text-align: center;
}

.data-table {
  width: 100%;
  margin: 16px 0 22px;
  border-collapse: collapse;
  color: #daf9ff;
  font-size: 15px;
}

.data-table th,
.data-table td {
  border-bottom: 1px solid var(--line);
  padding: 12px 10px;
  text-align: left;
  vertical-align: top;
}

.data-table th {
  color: #fff;
  background: rgba(32, 212, 220, .07);
}

.data-table td:first-child {
  width: 28%;
  color: #fff;
  font-weight: 700;
}

.page-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.page-actions a {
  min-width: 180px;
  padding: 11px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  text-align: center;
}

.page-footer {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  text-align: center;
}

a {
  color: #d7fbff;
  font-weight: 700;
  text-decoration: none;
}

a:hover,
a:focus {
  color: var(--yellow);
  text-decoration: underline;
}

@media (max-width: 720px) {
  .page-content {
    width: min(100% - 24px, 1080px);
    padding: 24px 0;
  }

  .info-grid,
  .rule-grid {
    grid-template-columns: 1fr;
  }

  .data-table {
    display: block;
    overflow-x: auto;
  }

  .content-panel {
    padding: 20px;
  }
}