*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #0a0a0a;
  --panel: #111111;
  --panel-2: #1a1a1a;
  --ink: #b0b0b0;
  --bright: #e0e0e0;
  --green: #33ff33;
  --green-dim: #1a8a1a;
  --green-glow: rgba(51, 255, 51, 0.12);
  --amber: #ffb800;
  --line: #222222;
  --err: #ff4444;
  --mono: "Cascadia Code", "SF Mono", "Fira Code", "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
}

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 18px;
  line-height: 1.65;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0, 0, 0, 0.08) 2px,
      rgba(0, 0, 0, 0.08) 4px
    );
  z-index: 9999;
}

::selection {
  background: var(--green);
  color: #000;
}

a {
  color: var(--green);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-shadow: 0 0 8px var(--green-glow);
}

/* ── Top nav ── */

.topbar {
  display: flex;
  align-items: center;
  gap: 0;
  border-bottom: 1px solid var(--green-dim);
  background: var(--panel);
  padding: 0 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand {
  color: var(--green);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.7rem 1rem 0.7rem 0.2rem;
  border-right: 1px solid var(--line);
  margin-right: 0.2rem;
  white-space: nowrap;
}

.topbar nav {
  display: flex;
  gap: 0;
  overflow-x: auto;
}

.topbar nav a {
  color: var(--ink);
  padding: 0.7rem 0.9rem;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  font-size: 0.85rem;
  transition: color 0.1s, border-color 0.1s;
}

.topbar nav a:hover {
  color: var(--green);
  text-decoration: none;
}

.topbar nav a.active {
  color: var(--green);
  border-bottom-color: var(--green);
  text-shadow: 0 0 6px var(--green-glow);
}

/* ── Main ── */

.main {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.8rem 1.5rem 4rem;
}

.page-head h1 {
  margin: 0 0 0.3rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--green);
  letter-spacing: 0.04em;
}

.page-head h1::before {
  content: "> ";
  color: var(--green-dim);
}

.page-head p {
  margin: 0 0 1.5rem;
  color: var(--ink);
  max-width: 62ch;
  font-size: 0.85rem;
}

/* ── Cards (home) ── */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.8rem;
}

.card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 1rem 1.1rem;
  color: inherit;
  transition: border-color 0.15s;
}

.card:hover {
  border-color: var(--green-dim);
  text-decoration: none;
}

.card h2 {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
  color: var(--green);
  font-weight: 600;
}

.card h2::before {
  content: "$ ";
  color: var(--green-dim);
}

.card p {
  margin: 0;
  color: var(--ink);
  font-size: 0.82rem;
}

/* ── Panels / results ── */

.panel,
.result {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 1rem 1.1rem;
  margin-top: 0.8rem;
}

.panel h2,
.result h3 {
  margin: 0 0 0.6rem;
  font-size: 0.95rem;
  color: var(--amber);
}

/* ── Forms ── */

.stack {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.grid-2,
.grid-3 {
  display: grid;
  gap: 0.8rem;
}

.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: 1fr 1fr 1fr; }

label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.82rem;
  color: var(--ink);
}

input, select, textarea, button {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--bright);
}

input, select, textarea {
  background: #050505;
  border: 1px solid var(--line);
  padding: 0.5rem 0.6rem;
  outline: none;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--green-dim);
  box-shadow: 0 0 0 1px var(--green-dim);
}

textarea {
  width: 100%;
  resize: vertical;
  font-size: 0.8rem;
}

button, .button {
  appearance: none;
  border: 1px solid var(--green);
  background: transparent;
  color: var(--green);
  font-weight: 600;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  width: fit-content;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.8rem;
  transition: background 0.12s, color 0.12s;
}

button:hover, .button:hover {
  background: var(--green);
  color: #000;
  text-decoration: none;
}

button.ghost {
  border-color: var(--green-dim);
  color: var(--green-dim);
}

button.ghost:hover {
  background: var(--green-dim);
  color: #000;
}

.check {
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
  color: var(--bright);
}

.inline {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.inline input {
  flex: 1;
}

.actions {
  display: flex;
  gap: 0.6rem;
  align-items: center;
}

.htmx-indicator {
  display: none;
  color: var(--green-dim);
}

.htmx-request .htmx-indicator,
.htmx-indicator.htmx-request {
  display: inline;
}

/* ── Feedback ── */

.error {
  color: var(--err);
  border: 1px solid var(--err);
  padding: 0.6rem 0.7rem;
  font-size: 0.85rem;
}

.error::before {
  content: "ERR: ";
  font-weight: 700;
}

.notice {
  color: var(--ink);
  margin-top: 0;
  font-size: 0.82rem;
}

.notice::before {
  content: "# ";
  color: var(--green-dim);
}

/* ── Row heads / copy ── */

.row-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.3rem;
  color: var(--ink);
  font-size: 0.8rem;
}

.row-head button {
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
  border-color: var(--line);
  color: var(--ink);
}

.row-head button:hover {
  border-color: var(--green);
  color: var(--green);
  background: transparent;
}

/* ── PEM grid ── */

.pem-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
  margin-bottom: 0.8rem;
}

/* ── Key-value result ── */

.kv {
  display: grid;
  gap: 0.4rem;
}

.kv div {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 0.6rem;
  align-items: center;
  font-size: 0.85rem;
}

.kv div span {
  color: var(--ink);
}

.kv div span::before {
  content: "» ";
  color: var(--green-dim);
}

code {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--green);
}

/* ── Tables ── */

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

th {
  text-align: left;
  padding: 0.4rem 0.4rem;
  border-bottom: 1px solid var(--green-dim);
  color: var(--green);
  font-weight: 600;
}

td {
  text-align: left;
  padding: 0.4rem 0.4rem;
  border-bottom: 1px solid var(--line);
}

/* ── Hero number (units) ── */

.hero-number {
  font-size: 2rem;
  margin: 0.2rem 0;
  color: var(--green);
  text-shadow: 0 0 12px var(--green-glow);
}

.hero-number span {
  color: var(--ink);
  font-size: 0.9rem;
}

.muted { color: var(--ink); }

fieldset {
  border: 0;
  padding: 0;
  margin: 0;
}

/* ── Responsive ── */

@media (max-width: 700px) {
  .topbar { flex-wrap: wrap; }
  .topbar nav { width: 100%; }
  .grid-2, .grid-3, .pem-grid, .kv div { grid-template-columns: 1fr; }
  .main { padding: 1rem; }
}