/* WHSIQ Dust portal — standalone air-monitoring surface. Dark, responsive. */
:root {
  --bg: #0b1120; --bg-card: #141c2e; --bg-elev: #1e2a42;
  --text: #f1f5f9; --text-dim: #94a3b8; --text-mute: #64748b;
  --border: #243049; --accent: #38bdf8; --accent-strong: #0ea5e9;
  --safe: #22c55e; --elevated: #f59e0b; --action: #ef4444; --stale: #64748b;
  --radius: 14px; --shadow: 0 10px 30px rgba(2,6,23,.45);
  --font: -apple-system, "Inter", system-ui, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--font); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
.d-wrap { max-width: 1100px; margin: 0 auto; padding: 0 16px 48px; }

.d-header {
  position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 14px;
  padding: 14px 16px; background: rgba(11,17,32,.85); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.d-brand { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 17px; letter-spacing: -.01em; }
.d-logo { width: 26px; height: 26px; border-radius: 7px; background: linear-gradient(135deg,#0ea5e9,#22d3ee); display: grid; place-items: center; font-size: 15px; }
.d-sub { color: var(--text-dim); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .08em; }
.d-header-spacer { flex: 1; }
.d-user { color: var(--text-dim); font-size: 13px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

.d-btn {
  appearance: none; border: 1px solid var(--border); background: var(--bg-elev); color: var(--text);
  font: inherit; font-size: 14px; font-weight: 600; padding: 9px 16px; border-radius: 10px; cursor: pointer;
  transition: background .15s, border-color .15s, transform .1s;
}
.d-btn:hover { background: #26324a; }
.d-btn:active { transform: translateY(1px); }
.d-btn-primary { background: var(--accent-strong); border-color: var(--accent-strong); color: #04121f; }
.d-btn-primary:hover { background: var(--accent); }
.d-btn-ghost { background: transparent; }
.d-btn-danger { color: #fca5a5; }
.d-btn-sm { padding: 6px 11px; font-size: 13px; }

/* station cards */
.d-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; margin-top: 18px; }
.d-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; box-shadow: var(--shadow); position: relative; overflow: hidden; }
.d-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--band-c, var(--stale)); }
.d-card-top { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.d-card-name { font-weight: 700; font-size: 15px; }
.d-zone { font-size: 11px; color: var(--text-mute); text-transform: uppercase; letter-spacing: .05em; }
.d-dustlabel { margin-top: 12px; font-size: 11px; font-weight: 700; color: var(--text-mute); text-transform: uppercase; letter-spacing: .07em; }
.d-value { font-size: 40px; font-weight: 800; line-height: 1.05; letter-spacing: -.02em; margin: 2px 0 2px; font-variant-numeric: tabular-nums; }
.d-value small { font-size: 15px; font-weight: 600; color: var(--text-dim); }
.d-band { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 700; letter-spacing: .04em; }
.d-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--band-c, var(--stale)); }
.d-meta { margin-top: 10px; font-size: 12px; color: var(--text-mute); }
.d-ref { margin-top: 10px; border-top: 1px solid var(--border); padding-top: 9px; font-size: 12px; color: var(--text-dim); }
.d-stale-tag { font-size: 10px; font-weight: 700; color: var(--stale); border: 1px solid var(--stale); border-radius: 5px; padding: 1px 5px; }

/* bands */
.b-SAFE { --band-c: var(--safe); color: var(--safe); }
.b-ELEVATED { --band-c: var(--elevated); color: var(--elevated); }
.b-ACTION { --band-c: var(--action); color: var(--action); }
.b-STALE, .b-NO_DATA { --band-c: var(--stale); color: var(--stale); }

/* auth card */
.d-center { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.d-auth { width: 100%; max-width: 380px; background: var(--bg-card); border: 1px solid var(--border); border-radius: 18px; padding: 28px; box-shadow: var(--shadow); }
.d-auth h1 { font-size: 20px; margin: 10px 0 4px; }
.d-auth p { color: var(--text-dim); font-size: 13px; margin: 0 0 18px; }
.d-field { margin-bottom: 14px; }
.d-field label { display: block; font-size: 12px; color: var(--text-dim); margin-bottom: 5px; font-weight: 600; }
.d-input, .d-select { width: 100%; padding: 11px 13px; background: var(--bg); color: var(--text); border: 1px solid var(--border); border-radius: 10px; font: inherit; font-size: 15px; }
.d-input:focus, .d-select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(56,189,248,.2); }
.d-err { color: #fca5a5; font-size: 13px; min-height: 18px; margin-top: 2px; }
.d-hint { color: var(--text-mute); font-size: 12px; }

/* admin tables */
.d-section { margin-top: 24px; }
.d-section h2 { font-size: 16px; margin: 0 0 12px; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.d-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.d-table th { text-align: left; color: var(--text-mute); font-size: 11px; text-transform: uppercase; letter-spacing: .05em; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.d-table td { padding: 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.d-chip { display: inline-block; font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 999px; background: var(--bg-elev); color: var(--text-dim); }
.d-chip.admin { background: rgba(56,189,248,.15); color: var(--accent); }
.d-chip.off { background: rgba(239,68,68,.12); color: #fca5a5; }
.d-stations-pick { display: flex; flex-wrap: wrap; gap: 8px 14px; max-height: 220px; overflow-y: auto; padding: 12px; background: var(--bg); border: 1px solid var(--border); border-radius: 10px; }
.d-check { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; cursor: pointer; }
.d-empty { color: var(--text-mute); text-align: center; padding: 40px 16px; font-style: italic; }

/* modal */
.d-backdrop { position: fixed; inset: 0; background: rgba(2,6,23,.65); backdrop-filter: blur(4px); display: grid; place-items: center; padding: 20px; z-index: 50; }
.d-modal { width: 100%; max-width: 460px; background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 22px; box-shadow: var(--shadow); }
.d-modal h3 { margin: 0 0 14px; font-size: 17px; }
.d-modal-foot { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }
[hidden] { display: none !important; }