:root {
  color-scheme: light dark;
  --op-bg: #090c0f;
  --op-surface: #11161b;
  --op-surface-raised: #151b21;
  --op-text: #f2f5f7;
  --op-muted: #93a0aa;
  --op-border: #2b343c;
  --op-border-strong: #3a454e;
  --op-accent: #72ade7;
  --op-accent-text: #071019;
  --op-success: #62d991;
  --op-warning: #f1cf78;
  --op-danger: #ff9d96;
  --op-shadow: rgba(0, 0, 0, 0.3);
}

:root[data-theme="light"] {
  color-scheme: light;
  --op-bg: #f5f7f8;
  --op-surface: #ffffff;
  --op-surface-raised: #eef2f5;
  --op-text: #111820;
  --op-muted: #5e6c77;
  --op-border: #d6dde3;
  --op-border-strong: #aebac4;
  --op-accent: #1d6fb8;
  --op-accent-text: #ffffff;
  --op-success: #147b43;
  --op-warning: #8a5b00;
  --op-danger: #b42318;
  --op-shadow: rgba(19, 34, 48, 0.12);
}

:root[data-theme="dark"] {
  color-scheme: dark;
}

.op-theme-toggle {
  display: inline-flex;
  min-width: 43px;
  min-height: 43px;
  padding: 0 13px;
  color: var(--op-text);
  background: var(--op-surface);
  border: 1px solid var(--op-border-strong);
  border-radius: 4px;
  align-items: center;
  justify-content: center;
  font: 650 13px/1 ui-sans-serif, system-ui, sans-serif;
}

.op-theme-toggle:hover,
.op-theme-toggle:focus-visible {
  border-color: var(--op-accent);
}

:root {
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--op-bg);
  color: var(--op-text);
}

* { box-sizing: border-box; }
body { min-height: 100vh; margin: 0; background: var(--op-bg); color: var(--op-text); }
button, input { font: inherit; }
button { cursor: pointer; }
.hidden { display: none !important; }
main { width: min(1180px, calc(100% - 32px)); margin: 0 auto; padding: 40px 0 72px; }
.topbar, .topbar-actions, .panel-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.topbar { margin-bottom: 48px; }
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: clamp(30px, 5vw, 44px); letter-spacing: -0.04em; }
h2 { margin-bottom: 6px; }
.eyebrow { margin-bottom: 8px; color: var(--op-accent); font-size: 11px; font-weight: 750; letter-spacing: .14em; text-transform: uppercase; }
.muted { color: var(--op-muted); }
.auth-card, .panel, .summary-grid article, .phone-card { background: var(--op-surface); border: 1px solid var(--op-border); border-radius: 6px; box-shadow: 0 14px 42px var(--op-shadow); }
.auth-card { width: min(100%, 420px); margin: 10vh auto 0; padding: 28px; }
.auth-card p { color: var(--op-muted); line-height: 1.5; }
form, label { display: grid; gap: 10px; }
form { gap: 18px; margin-top: 24px; }
label { color: var(--op-muted); font-size: 13px; font-weight: 650; }
input { min-height: 46px; padding: 0 12px; color: var(--op-text); background: var(--op-bg); border: 1px solid var(--op-border-strong); border-radius: 4px; }
.primary, .secondary { min-height: 43px; padding: 0 16px; border-radius: 4px; font-weight: 700; }
.primary { color: var(--op-accent-text); background: var(--op-accent); border: 1px solid var(--op-accent); }
.secondary { color: var(--op-text); background: transparent; border: 1px solid var(--op-border-strong); }
.auth-status { margin: 0; color: var(--op-accent) !important; }
.error { margin: 14px 0 0; color: var(--op-danger); }
.summary-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-bottom: 20px; }
.summary-grid article { display: grid; gap: 10px; padding: 20px; }
.summary-grid span { color: var(--op-muted); font-size: 12px; }
.summary-grid strong { font-size: 30px; }
.panel { padding: 22px; }
.phone-panel { margin-top: 20px; }
.panel-heading { margin-bottom: 20px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 14px 12px; border-bottom: 1px solid var(--op-border); text-align: left; white-space: nowrap; }
th { color: var(--op-muted); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }
td { font-size: 13px; }
.state { color: var(--op-success); font-weight: 700; }
.phone-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.phone-card { display: grid; gap: 16px; padding: 18px; box-shadow: none; }
.phone-card-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.phone-card h3 { margin: 4px 0 0; font-size: 18px; }
.slot-id { color: var(--op-muted); font-size: 10px; font-weight: 750; letter-spacing: .1em; text-transform: uppercase; }
.phone-state { padding: 5px 8px; color: var(--op-muted); background: var(--op-bg); border: 1px solid var(--op-border); border-radius: 999px; font-size: 10px; font-weight: 750; text-transform: uppercase; }
.state-ready, .state-allocated { color: var(--op-success); }
.phone-detail { display: grid; gap: 5px; min-width: 0; }
.phone-detail span { color: var(--op-muted); font-size: 10px; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; }
.phone-detail strong { overflow-wrap: anywhere; font-size: 12px; font-weight: 600; line-height: 1.5; }
.phone-owner strong { color: var(--op-accent); }
.phone-unassigned strong { color: var(--op-muted); }
.observe-phone { width: 100%; }
dialog { width: min(1100px, calc(100% - 24px)); padding: 0; color: var(--op-text); background: var(--op-bg); border: 1px solid var(--op-border-strong); border-radius: 8px; }
dialog::backdrop { background: rgb(0 0 0 / 72%); }
.observation-shell { display: grid; gap: 14px; padding: 18px; }
.observation-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.observation-notice { margin: 0; padding: 12px; color: var(--op-accent); background: var(--op-surface); border: 1px solid var(--op-border); border-radius: 4px; font-size: 13px; font-weight: 650; }
#observation-frame { width: 100%; height: min(72vh, 820px); background: #000; border: 1px solid var(--op-border); border-radius: 4px; }

@media (max-width: 760px) {
  main { width: min(100% - 24px, 1180px); padding-top: 24px; }
  .topbar { align-items: flex-start; }
  .summary-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .phone-grid { grid-template-columns: 1fr; }
}