/* Industrial UI — site styles. Dark "control room" theme by default, light theme on request. */

:root {
  --bg: #0e1115;
  --bg-grid: rgba(255, 255, 255, 0.035);
  --panel: #151a20;
  --panel-2: #1b2129;
  --border: #29313b;
  --border-strong: #3a4551;
  --text: #dde3ea;
  --muted: #8b97a5;
  --accent: #f2a516;
  --accent-ink: #1a1203;
  --ok: #38c774;
  --danger: #ef5350;
  --info: #3fb4d8;
  --focus: #3fb4d8;
  --shadow: 0 1px 0 rgba(0, 0, 0, 0.4);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --radius: 3px;
  --wrap: 1120px;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #eceff3;
  --bg-grid: rgba(0, 0, 0, 0.045);
  --panel: #ffffff;
  --panel-2: #f4f6f8;
  --border: #cdd4dc;
  --border-strong: #aab4bf;
  --text: #18202a;
  --muted: #566271;
  --accent: #9a5c00;
  --accent-ink: #ffffff;
  --ok: #1d8a4b;
  --danger: #c62828;
  --info: #0f7fa6;
  --focus: #0f7fa6;
  --shadow: 0 1px 2px rgba(20, 30, 40, 0.08);
  color-scheme: light;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #eceff3;
    --bg-grid: rgba(0, 0, 0, 0.045);
    --panel: #ffffff;
    --panel-2: #f4f6f8;
    --border: #cdd4dc;
    --border-strong: #aab4bf;
    --text: #18202a;
    --muted: #566271;
    --accent: #9a5c00;
    --accent-ink: #ffffff;
    --ok: #1d8a4b;
    --danger: #c62828;
    --info: #0f7fa6;
    --focus: #0f7fa6;
    --shadow: 0 1px 2px rgba(20, 30, 40, 0.08);
    color-scheme: light;
  }
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 var(--font);
}

main { flex: 1; }

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

:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

h1, h2, h3 { line-height: 1.2; margin: 0 0 0.5em; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 5vw, 3.1rem); }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }

code, .mono { font-family: var(--mono); font-size: 0.92em; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }

.muted { color: var(--muted); }
.hidden { display: none !important; }

/* ---------- Top bar ---------- */

.topbar {
  border-bottom: 1px solid var(--border);
  background: var(--panel);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 56px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.14em;
  font-size: 0.9rem;
  margin-right: auto;
}
.brand svg { width: 28px; height: 28px; flex: none; color: var(--accent); }
.brand b { color: var(--accent); font-weight: 700; }

.nav { display: flex; gap: 4px; align-items: center; flex-wrap: wrap; }
.nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: var(--radius);
  font-size: 0.92rem;
}
.nav a:hover { color: var(--text); background: var(--panel-2); }
.nav a[aria-current="page"] { color: var(--text); box-shadow: inset 0 -2px 0 var(--accent); border-radius: 0; }

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  width: 34px;
  height: 34px;
  border-radius: var(--radius);
  cursor: pointer;
  display: grid;
  place-items: center;
}
.theme-toggle:hover { color: var(--text); border-color: var(--border-strong); }
.theme-toggle svg { width: 16px; height: 16px; }

/* ---------- Buttons & forms ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 18px;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  background: var(--panel-2);
  color: var(--text);
  font: 600 0.95rem var(--font);
  text-decoration: none;
  cursor: pointer;
  letter-spacing: 0.02em;
}
.btn:hover { border-color: var(--muted); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { filter: brightness(1.08); border-color: var(--accent); }
.btn-ghost { background: transparent; }
.btn-block { width: 100%; }

.field { display: grid; gap: 6px; margin-bottom: 16px; }
.field label, .label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.input {
  width: 100%;
  min-height: 44px;
  padding: 0 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  background: var(--bg);
  color: var(--text);
  font: 1rem var(--font);
}
.input:focus { border-color: var(--focus); outline: none; box-shadow: 0 0 0 3px color-mix(in srgb, var(--focus) 30%, transparent); }

.check { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 18px; font-size: 0.92rem; color: var(--muted); }
.check input { margin-top: 4px; width: 16px; height: 16px; accent-color: var(--accent); flex: none; }

.notice {
  border: 1px solid var(--border);
  border-left: 3px solid var(--info);
  background: var(--panel-2);
  padding: 12px 14px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 0.95rem;
}
.notice-ok { border-left-color: var(--ok); }
.notice-error { border-left-color: var(--danger); }
.notice-warn { border-left-color: var(--accent); }

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

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.panel-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--panel-2);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.panel-head .spacer { margin-left: auto; }
.panel-body { padding: 20px 16px; }

.led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
  flex: none;
}
.led-ok { background: var(--ok); box-shadow: 0 0 6px var(--ok); }
.led-warn { background: var(--accent); box-shadow: 0 0 6px var(--accent); }
.led-off { background: var(--border-strong); }

.kv { display: grid; grid-template-columns: max-content 1fr; gap: 8px 20px; margin: 0; }
.kv dt { color: var(--muted); font-size: 0.85rem; letter-spacing: 0.04em; }
.kv dd { margin: 0; font-family: var(--mono); overflow-wrap: anywhere; }

/* ---------- Page sections ---------- */

.page { padding: 40px 0 64px; }
.page-narrow { max-width: 460px; }
.page-text { max-width: 760px; }
.page-text h2 { margin-top: 1.6em; font-size: 1.2rem; }
.page-text li { margin-bottom: 0.4em; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.hero {
  border-bottom: 1px solid var(--border);
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--bg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px);
  background-size: 32px 32px;
  position: relative;
}
.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 6px;
  background: repeating-linear-gradient(-45deg, var(--accent) 0 10px, transparent 10px 20px);
  opacity: 0.8;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
  padding: 72px 16px 80px;
}
.hero-inner > *, .steps > *, .grid-2 > * { min-width: 0; }
.hero .lead { font-size: 1.15rem; color: var(--muted); max-width: 34em; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }

.platforms { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 20px; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 3px 8px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  color: var(--muted);
  background: var(--panel);
}

.readout { font-family: var(--mono); }
.readout-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 0.9rem;
}
.readout-row:last-child { border-bottom: 0; }
.readout-row span:first-child { color: var(--muted); }
.readout-row .ok { color: var(--ok); }
.readout-row .warn { color: var(--accent); }

.section { padding: 56px 0; }
.section + .section { border-top: 1px solid var(--border); }
.section-head { margin-bottom: 24px; }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: step; list-style: none; padding: 0; margin: 0; }
.steps li { counter-increment: step; }
.steps .panel-body { padding-top: 16px; }
.steps .panel-head::before { content: "0" counter(step); font-family: var(--mono); color: var(--accent); letter-spacing: 0.05em; }
.steps p { color: var(--muted); font-size: 0.95rem; margin: 0; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-2 p { color: var(--muted); font-size: 0.95rem; margin: 0; }
.grid-2 h3 { margin-bottom: 6px; }

/* ---------- Pricing matrix ---------- */

.table-scroll { overflow-x: auto; }
.matrix { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; min-width: 560px; }
.matrix th, .matrix td { padding: 14px 12px; text-align: right; border-bottom: 1px solid var(--border); }
.matrix thead th {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--panel-2);
  font-weight: 700;
}
.matrix th:first-child, .matrix td:first-child { text-align: left; }
.matrix tbody th { font-family: var(--mono); font-weight: 600; white-space: nowrap; }
.matrix td { font-family: var(--mono); }
.matrix td.na { color: var(--muted); }
.matrix td .unit { color: var(--muted); font-size: 0.8em; margin-left: 4px; }
.matrix tbody tr:last-child th, .matrix tbody tr:last-child td { border-bottom: 0; }
.matrix tbody tr:hover { background: var(--panel-2); }

/* ---------- Account: licenses ---------- */

.small { font-size: 0.88rem; }
.section-gap { margin-top: 16px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.led-error { background: var(--danger); box-shadow: 0 0 6px var(--danger); }

.licenses { width: 100%; border-collapse: collapse; min-width: 720px; font-size: 0.92rem; }
.licenses th, .licenses td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: middle; }
.licenses thead th {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--panel-2);
  font-weight: 700;
}
.licenses tbody tr:last-child td { border-bottom: 0; }
.licenses td.mono, .licenses .mono { font-family: var(--mono); font-size: 0.88rem; }
.licenses .title { font-weight: 600; }
.licenses .sub { color: var(--muted); font-size: 0.84rem; }
.licenses td:last-child { text-align: right; }
.status { display: inline-flex; align-items: center; gap: 8px; white-space: nowrap; }
.status-reason { display: block; color: var(--muted); font-size: 0.8rem; max-width: 22em; white-space: normal; }
.btn-sm { min-height: 32px; padding: 0 12px; font-size: 0.85rem; }

/* ---------- Account: balance, top-up, buy ---------- */

.balance { display: flex; align-items: baseline; gap: 10px; margin-bottom: 16px; }
.balance-value { font-size: 2.4rem; font-weight: 700; line-height: 1; color: var(--text); }

.topup { display: grid; grid-template-columns: 172px 1fr; gap: 16px; margin-top: 4px; }
.topup > * { min-width: 0; }
.qr { background: #ffffff; padding: 6px; border-radius: var(--radius); border: 1px solid var(--border); align-self: start; }
.qr svg { display: block; width: 100%; height: auto; }
.topup-info .label { margin-bottom: 6px; }
.address {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 10px;
  overflow-wrap: anywhere;
  margin-bottom: 8px;
  user-select: all;
}
.topup-info ul { padding-left: 18px; margin: 12px 0 0; }
.topup-info li { margin-bottom: 4px; }

.incoming { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 8px; }
.incoming li {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 0.9rem;
  padding: 8px 10px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
}
.incoming .mono { font-weight: 600; }

.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
select.input { appearance: none; padding-right: 32px; background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%); background-position: calc(100% - 17px) 50%, calc(100% - 12px) 50%; background-size: 5px 5px; background-repeat: no-repeat; }

.licenses .num, .licenses th.num { text-align: right; font-family: var(--mono); }
.delta-pos { color: var(--ok); }
.delta-neg { color: var(--text); }
.row-actions { display: inline-flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.reissue-row td { background: var(--panel-2); }
.reissue-form { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.reissue-form .input { flex: 1 1 320px; min-height: 36px; }

@media (max-width: 560px) {
  .topup, .field-row { grid-template-columns: 1fr; }
  .qr { max-width: 200px; }
}

/* ---------- Downloads ---------- */

.download-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 24px 0 8px; }
.download-grid > * { min-width: 0; }
.download-button { margin-top: 18px; }
.download-grid .kv dd { overflow-wrap: anywhere; }
@media (max-width: 860px) {
  .download-grid { grid-template-columns: 1fr; }
}

/* ---------- Admin ---------- */

.admin .brand img { flex: none; }
.admin h1 { font-size: 1.8rem; margin-bottom: 16px; }
.admin .nav a { position: relative; }
.count {
  display: inline-block;
  min-width: 18px;
  padding: 0 5px;
  margin-left: 4px;
  border-radius: 9px;
  background: var(--accent);
  color: var(--accent-ink);
  font: 700 0.72rem/18px var(--font);
  text-align: center;
}
.code-input { font-size: 1.6rem; letter-spacing: 0.4em; text-align: center; }

.tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.tiles > * { min-width: 0; }
.tile { padding: 16px; }
.tile-label { color: var(--muted); font-size: 0.85rem; }
.tile-value { font-size: 2rem; font-weight: 600; line-height: 1.2; margin: 6px 0 4px; overflow-wrap: anywhere; }
.tile-sub { color: var(--muted); font-size: 0.82rem; }

.licenses td.num, .licenses th.num { font-variant-numeric: tabular-nums; }
.licenses td.text-left { text-align: left; }
.clickable tbody tr { cursor: pointer; }
.clickable tbody tr:hover, .clickable tbody tr:focus-visible { background: var(--panel-2); }

.tariff-editor td { padding: 8px 10px; }
.tariff-cell { display: flex; align-items: center; gap: 8px; justify-content: flex-end; }
.tariff-cell .input { width: 96px; min-height: 36px; text-align: right; }
.tariff-cell input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--accent); flex: none; }
.actions-row { display: flex; gap: 12px; flex-wrap: wrap; }

.search-row { display: flex; gap: 8px; max-width: 520px; }
.search-row .input { flex: 1; }
.textarea { min-height: 200px; padding: 10px 12px; resize: vertical; line-height: 1.5; }

.review-list { display: grid; gap: 12px; }
.review { display: grid; gap: 12px; }
.review-head { display: flex; gap: 14px; flex-wrap: wrap; align-items: baseline; }
.review-actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.review-actions .input { width: 150px; min-height: 32px; }

.upload-form { margin-top: 16px; }
.upload-form .field { margin-bottom: 10px; }
.upload-progress { width: 100%; height: 8px; margin-bottom: 10px; accent-color: var(--accent); }
.admin .download-grid .kv dd { font-size: 0.82rem; }

@media (max-width: 860px) {
  .tiles { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .tiles { grid-template-columns: 1fr; }
}

/* ---------- Footer ---------- */

.footer { border-top: 1px solid var(--border); background: var(--panel); font-size: 0.88rem; color: var(--muted); }
.footer-inner { display: flex; gap: 20px; flex-wrap: wrap; align-items: center; padding: 20px 16px; }
.footer a { color: var(--muted); }
.footer a:hover { color: var(--text); }
.footer .spacer { margin-left: auto; }

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; padding: 48px 16px 56px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .steps, .grid-2 { grid-template-columns: 1fr; }
  .topbar-inner { gap: 8px; padding-top: 8px; padding-bottom: 8px; }
  .brand span { display: none; }
  .nav a { padding: 6px 8px; }
  .footer .spacer { margin-left: 0; width: 100%; }
  .kv { grid-template-columns: 1fr; gap: 2px; }
  .kv dd { margin-bottom: 10px; }
}