/* ============================================
   TOKENS
   ============================================ */
:root {
  --bg:            #0e1113;
  --panel:         #171b1e;
  --panel-raised:  #1f2529;
  --border:        #2a3136;
  --border-soft:   #23292d;

  --text:          #e9ebec;
  --text-muted:    #8b949c;
  --text-faint:    #5c656c;

  --amber:         #ff9a1f;
  --amber-dim:     #4a3418;

  --north-coal:    #7fb3e0;
  --north-coal-bg: #1b2733;
  --west-coal:     #b78bd6;
  --west-coal-bg:  #26213a;
  --dirt:          #c98a4b;
  --dirt-bg:       #2b241d;

  --danger:        #e5484d;
  --danger-bg:     #3a1e1f;
  --caution:       #d9b64f;
  --caution-bg:    #35301c;
  --good:          #3ecf8e;
  --good-bg:       #1a2f27;

  --radius: 3px;
  --font-display: 'Arial Narrow', 'Helvetica Neue', Arial, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  --font-mono: 'Consolas', 'SFMono-Regular', Menlo, Monaco, 'Courier New', monospace;
}

* { box-sizing: border-box; }

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

/* Riveted panel texture via layered radial-gradients (subtle) */
body {
  background-image:
    radial-gradient(circle at 1px 1px, rgba(255,255,255,0.015) 1px, transparent 0);
  background-size: 24px 24px;
}

h1, h2, h3 {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0;
}

/* ============================================
   TOPBAR
   ============================================ */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--panel) 0%, var(--bg) 100%);
}
.topbar__brand { display: flex; align-items: center; gap: 14px; }
.topbar__mark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  background: var(--amber);
  color: #1a1200;
  padding: 8px 10px;
  border-radius: var(--radius);
  letter-spacing: 0.05em;
}
.topbar__titles h1 { font-size: 20px; color: var(--text); }
.topbar__titles p {
  margin: 2px 0 0;
  font-size: 12.5px;
  color: var(--text-muted);
  font-family: var(--font-body);
  text-transform: none;
  letter-spacing: 0;
}
.topbar__link {
  color: var(--amber);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid var(--amber-dim);
  padding: 8px 14px;
  border-radius: var(--radius);
  transition: background 0.15s ease;
}
.topbar__link:hover { background: var(--amber-dim); }

/* ============================================
   LAYOUT
   ============================================ */
.layout {
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 28px;
  max-width: 1400px;
  margin: 0 auto;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 22px;
}

.panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}
.panel__header h2 {
  font-size: 17px;
  color: var(--text);
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.panel__index {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: 0;
}

.panel__subheader {
  margin: 14px 0 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-soft);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  font-family: var(--font-display);
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 9px 16px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: filter 0.12s ease, background 0.12s ease;
}
.btn--accent { background: var(--amber); color: #1a1200; font-weight: 600; }
.btn--accent:hover { filter: brightness(1.08); }
.btn--ghost { background: transparent; color: var(--text-muted); border-color: var(--border); }
.btn--ghost:hover { color: var(--text); border-color: var(--text-muted); }
.btn--danger { background: transparent; color: var(--danger); border-color: var(--danger); margin-right: auto; }
.btn--danger:hover { background: var(--danger-bg); }

/* ============================================
   FILTER TABS
   ============================================ */
.type-filter, .status-filter {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.type-filter__btn, .status-filter__btn {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  background: var(--panel-raised);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: var(--radius);
  cursor: pointer;
}
.type-filter__btn.is-active, .status-filter__btn.is-active {
  background: var(--amber-dim);
  border-color: var(--amber);
  color: var(--amber);
}

/* ============================================
   CARD GRID — "stamped equipment plate" signature
   ============================================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}

.plate {
  position: relative;
  background: var(--panel-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 14px 12px;
  cursor: pointer;
  transition: border-color 0.12s ease, transform 0.08s ease;
}
.plate:hover { border-color: var(--text-faint); transform: translateY(-1px); }

/* corner rivets */
.plate::before, .plate::after {
  content: '';
  position: absolute;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--border);
  top: 6px;
}
.plate::before { left: 6px; }
.plate::after { right: 6px; }

.plate__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 10px;
}
.plate__number {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}
.plate__badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 7px;
  border-radius: 2px;
  white-space: nowrap;
}
.plate__badge--north_coal { background: var(--north-coal-bg); color: var(--north-coal); }
.plate__badge--west_coal { background: var(--west-coal-bg); color: var(--west-coal); }
.plate__badge--dirt { background: var(--dirt-bg); color: var(--dirt); }

.plate__meta {
  font-size: 12.5px;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.plate__meta strong { color: var(--text); font-weight: 500; }

.plate__priority {
  position: absolute;
  top: -8px;
  left: 12px;
  background: var(--bg);
  border: 1px solid var(--amber);
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 8px;
}

.plate__gauge {
  margin-top: 10px;
  height: 5px;
  background: var(--bg);
  border-radius: 3px;
  overflow: hidden;
  border: 1px solid var(--border-soft);
}
.plate__gauge-fill {
  height: 100%;
  background: var(--good);
}
.plate__gauge-fill.is-short { background: var(--caution); }
.plate__gauge-fill.is-empty { background: var(--danger); }
.plate__gauge-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 5px;
}

.plate__notes {
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-faint);
  font-style: italic;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.plate.is-inactive { opacity: 0.45; }

/* Truck plates — simpler, status-colored left bar */
.plate--truck {
  border-left-width: 3px;
  padding-left: 12px;
}
.plate--truck.status-assigned { border-left-color: var(--good); }
.plate--truck.status-spare_operator { border-left-color: var(--amber); }
.plate--truck.status-spare_no_operator { border-left-color: var(--caution); }
.plate--truck.status-down { border-left-color: var(--danger); }

.plate__status-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.status-assigned .plate__status-tag { color: var(--good); }
.status-spare_operator .plate__status-tag { color: var(--amber); }
.status-spare_no_operator .plate__status-tag { color: var(--caution); }
.status-down .plate__status-tag { color: var(--danger); }

.empty-state {
  color: var(--text-faint);
  font-size: 13px;
  text-align: center;
  padding: 30px 0;
}

/* ============================================
   MODAL
   ============================================ */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(5, 6, 7, 0.72);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}
.modal[hidden] { display: none; }
.modal__box {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 24px;
  width: 100%;
  max-width: 420px;
  max-height: 90vh;
  overflow-y: auto;
}
.modal__box h3 {
  font-size: 16px;
  margin-bottom: 18px;
  color: var(--text);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
  font-size: 12.5px;
  color: var(--text-muted);
  flex: 1;
}
.field input[type="text"],
.field input[type="number"],
.field select,
.field textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 9px 10px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 13.5px;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 2px solid var(--amber);
  outline-offset: -1px;
}
.field-row { display: flex; gap: 10px; }
.field--checkbox {
  flex-direction: row;
  align-items: center;
  gap: 8px;
}
.field--checkbox input { width: 16px; height: 16px; }
.field-hint {
  font-size: 12px;
  color: var(--caution);
  background: var(--caution-bg);
  padding: 8px 10px;
  border-radius: var(--radius);
  margin: -4px 0 14px;
}

.modal__actions {
  display: flex;
  gap: 10px;
  margin-top: 18px;
  justify-content: flex-end;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 640px) {
  .layout { padding: 16px; gap: 18px; }
  .topbar { padding: 14px 16px; flex-wrap: wrap; gap: 10px; }
  .panel { padding: 16px; }
  .card-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  .field-row { flex-direction: column; gap: 14px; }
  .modal__box { padding: 18px; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .plate { transition: none; }
}

/* Visible keyboard focus */
a:focus-visible, button:focus-visible, .plate:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}