@import url('https://fonts.googleapis.com/css2?family=Chakra+Petch:wght@400;500;600;700&family=Inter:wght@400;500;600&display=swap');

:root {
  --bg: #0a0d13;
  --panel: #11151e;
  --panel-raised: #161b26;
  --border: #232a3a;
  --text: #e4e8f1;
  --text-muted: #7c8499;
  --accent: #45c7b8;       /* cyan-teal, ore-scan glow */
  --accent-dim: #2a7d74;
  --amber: #d99a4e;        /* warm amber, EVE HUD echo */
  --danger: #c85a5a;
  --radius: 3px;
  --mono: 'Chakra Petch', sans-serif;
  --body-font: 'Inter', -apple-system, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--body-font);
  min-height: 100vh;
}

body {
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(69, 199, 184, 0.08), transparent),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.012) 0px, transparent 1px, transparent 2px);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, .display {
  font-family: var(--mono);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
  margin: 0 0 0.5em 0;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5em;
}

.eyebrow::before {
  content: '';
  width: 18px;
  height: 1px;
  background: var(--accent);
  display: inline-block;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ---------- Top nav ---------- */

.topnav {
  border-bottom: 1px solid var(--border);
  background: #0d1117;
}

.topnav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.brand {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.5em;
  margin-right: auto;
}

.brand-mark {
  width: 9px;
  height: 9px;
  background: var(--accent);
  transform: rotate(45deg);
  flex-shrink: 0;
  box-shadow: none;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  font-family: var(--body-font);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

.nav-links a {
  color: var(--text-muted);
}

.nav-links a.active,
.nav-links a:hover {
  color: var(--accent);
  text-decoration: none;
}

.char-badge {
  font-family: var(--body-font);
  font-size: 0.8rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.35rem 0.7rem;
}


/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--accent);
  color: var(--bg);
  background: var(--accent);
  cursor: pointer;
  transition: filter 0.15s ease;
}

.btn:hover {
  filter: brightness(1.12);
  text-decoration: none;
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---------- Panels / cards ---------- */

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.panel-raised {
  background: var(--panel-raised);
}

/* ---------- Login hero ---------- */

.hero {
  min-height: calc(100vh - 0px);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero-ring {
  position: absolute;
  width: 700px;
  height: 700px;
  border: 1px solid rgba(69, 199, 184, 0.15);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: spin 90s linear infinite;
}

.hero-ring::before {
  content: '';
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  top: -3px;
  left: calc(50% - 3px);
  box-shadow: 0 0 12px var(--accent);
}

.hero-ring.ring2 {
  width: 480px;
  height: 480px;
  animation-duration: 60s;
  animation-direction: reverse;
  border-color: rgba(217, 154, 78, 0.12);
}

.hero-ring.ring2::before {
  background: var(--amber);
  box-shadow: 0 0 12px var(--amber);
}

@keyframes spin {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .hero-ring { animation: none; }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 560px;
  padding: 0 1.5rem;
}

.hero-content .display {
  font-size: 2.75rem;
  margin-bottom: 0.75rem;
}

.hero-content p {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.6;
  margin-bottom: 2.25rem;
}

/* ---------- Layout: sidebar + content (docs) ---------- */

.layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2.5rem;
  padding: 2.5rem 0 5rem;
}

.sidebar {
  font-family: var(--mono);
  font-size: 0.88rem;
}

.sidebar-group {
  margin-bottom: 1.75rem;
}

.sidebar-group h3 {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.sidebar a {
  display: block;
  padding: 0.35rem 0;
  color: var(--text-muted);
  border-left: 2px solid transparent;
  padding-left: 0.75rem;
}

.sidebar a:hover, .sidebar a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  text-decoration: none;
}

.content h2 {
  font-size: 1.5rem;
  margin-top: 2.5rem;
}

.content h2:first-child { margin-top: 0; }

.content p, .content li {
  color: var(--text-muted);
  line-height: 1.7;
}

.content code {
  font-family: var(--mono);
  background: var(--panel-raised);
  padding: 0.1em 0.4em;
  border-radius: 2px;
  color: var(--amber);
}

/* ---------- Calculator ---------- */

.calc-form {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: flex-end;
  margin-bottom: 2rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field label {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.field input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 0.65rem 0.85rem;
  font-family: var(--body-font);
  font-size: 0.95rem;
  min-width: 220px;
}

.field input:focus {
  outline: none;
  border-color: var(--accent);
}

.result {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  margin-top: 0.5rem;
}

.result-row {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  font-family: var(--mono);
  font-size: 0.95rem;
}

.result-row.total {
  border-top: 1px solid var(--border);
  margin-top: 0.5rem;
  padding-top: 0.85rem;
  font-size: 1.2rem;
  color: var(--accent);
}

.error-text {
  color: var(--danger);
  font-family: var(--mono);
  font-size: 0.9rem;
}

/* ---------- Dashboard grid ---------- */

.tile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.tile {
  display: block;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color 0.15s ease;
}

.tile:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.tile .eyebrow { margin-bottom: 1rem; }

.tile p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
  margin: 0;
}

@media (max-width: 720px) {
  .layout { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}