/* POTA Assistant -- field-ops console style. Dark-first, high contrast,
   large touch targets, readable in direct sunlight. System fonts only
   (no CDN/webfont dependency -- this app should work with a weak signal
   in a park). */

:root {
  --bg: #0a0d0b;
  --surface: #121712;
  --surface-raised: #182019;
  --border: #26332a;
  --border-strong: #37493c;
  --text: #f0f4f1;
  --text-muted: #9fb3a8;
  --text-dim: #6c8177;
  --green: #35d47a;
  --green-strong: #4bffa0;
  --green-dim: #1c4c31;
  --amber: #f5b342;
  --amber-dim: #4d3c17;
  --red: #ff6b6b;
  --red-dim: #4a1f1f;
  --focus: #7be8b0;
  --radius: 14px;
  --radius-sm: 10px;
  --gap: 12px;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.45;
  -webkit-tap-highlight-color: transparent;
  padding-bottom: 48px;
}

button,
input {
  font-family: inherit;
}

a {
  color: var(--green-strong);
}

.app-shell {
  max-width: 560px;
  margin: 0 auto;
  padding: 0 14px;
}

/* ---------- Header / brand ---------- */

.app-header {
  padding: 18px 0 14px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.brand-mark {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 26px;
  letter-spacing: 0.06em;
  line-height: 1.15;
  color: var(--green-strong);
  text-transform: uppercase;
}

.brand-sub {
  margin-top: 4px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.backend-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  font-size: 12px;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-dim);
  flex: none;
}

.status-dot.ok {
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
}

.status-dot.warn {
  background: var(--amber);
  box-shadow: 0 0 6px var(--amber);
}

/* ---------- Sections / cards ---------- */

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: var(--gap);
}

.panel-title {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.panel-title .count {
  color: var(--text-dim);
  font-weight: 400;
  text-transform: none;
  letter-spacing: normal;
}

/* ---------- Buttons ---------- */

.btn {
  appearance: none;
  border: 1px solid var(--border-strong);
  background: var(--surface-raised);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 16px;
  font-weight: 600;
  min-height: 48px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  transition: transform 0.05s ease, border-color 0.15s ease, background 0.15s ease;
}

.btn:active {
  transform: scale(0.98);
}

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

.btn-primary {
  background: var(--green-dim);
  border-color: var(--green);
  color: var(--green-strong);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-ghost {
  background: transparent;
}

.btn-small {
  width: auto;
  min-height: 40px;
  padding: 8px 14px;
  font-size: 14px;
}

.btn-row {
  display: flex;
  gap: 8px;
}

.btn-row .btn {
  flex: 1;
}

/* ---------- Location panel ---------- */

.coord-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 10px;
  font-family: var(--font-mono);
  font-size: 15px;
  margin: 12px 0;
}

.coord-grid dt {
  color: var(--text-dim);
}

.coord-grid dd {
  margin: 0;
  color: var(--text);
}

.helper-text {
  font-size: 13px;
  color: var(--text-muted);
  margin: 8px 0 0;
}

.warning-box {
  border: 1px solid var(--amber-dim);
  background: rgba(245, 179, 66, 0.08);
  color: var(--amber);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 13.5px;
  margin-top: 10px;
}

.error-box {
  border: 1px solid var(--red-dim);
  background: rgba(255, 107, 107, 0.08);
  color: var(--red);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 13.5px;
  margin-top: 10px;
}

/* ---------- Search ---------- */

.search-input {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
}

.search-input:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
}

/* ---------- Park list rows ---------- */

.park-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.park-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  text-align: left;
  border: 1px solid var(--border);
  background: var(--surface-raised);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  cursor: pointer;
  color: var(--text);
}

.park-row:active {
  transform: scale(0.99);
}

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

.park-row-main {
  min-width: 0;
}

.park-ref {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--green-strong);
  font-size: 15px;
}

.park-name {
  font-size: 13.5px;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.park-dist {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--text-dim);
  flex: none;
  text-align: right;
}

.park-inactive-tag {
  display: inline-block;
  margin-left: 6px;
  font-size: 10.5px;
  color: var(--text-dim);
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  padding: 1px 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.empty-state {
  color: var(--text-dim);
  font-size: 14px;
  padding: 10px 2px;
}

/* ---------- Selected park ---------- */

.selected-park-ref {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 30px;
  color: var(--green-strong);
  letter-spacing: 0.02em;
  line-height: 1.1;
}

.selected-park-name {
  font-size: 15px;
  color: var(--text);
  margin-top: 4px;
}

.selected-park-meta {
  margin-top: 10px;
  font-size: 13.5px;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
}

/* ---------- Mode selector ---------- */

.mode-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.mode-btn {
  appearance: none;
  border: 1px solid var(--border-strong);
  background: var(--surface-raised);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 12px 4px;
  font-size: 14px;
  font-weight: 700;
  min-height: 52px;
  cursor: pointer;
  font-family: var(--font-mono);
}

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

.mode-btn.active {
  border-color: var(--green);
  background: var(--green-dim);
  color: var(--green-strong);
}

/* ---------- Frequency ---------- */

.freq-input-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.freq-input {
  flex: 1;
  min-height: 52px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
}

.freq-input:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
}

.freq-unit {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 15px;
}

.band-row {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.band-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-mono);
}

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

.band-btn.active {
  border-color: var(--amber);
  color: var(--amber);
}

.band-hint {
  margin-top: 8px;
  font-size: 12.5px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  min-height: 16px;
}

/* ---------- Comment ---------- */

.comment-input {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  resize: vertical;
}

.comment-input:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
}

/* ---------- Spot preview ---------- */

.spot-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 14px;
  font-size: 15px;
  margin-bottom: 12px;
}

.spot-grid dt {
  color: var(--text-dim);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  align-self: center;
}

.spot-grid dd {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 600;
}

.spot-grid dd.missing {
  color: var(--text-dim);
  font-family: var(--font-ui);
  font-weight: 400;
  font-style: italic;
}

.spot-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 13.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 12px;
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
}

.spot-status.ready {
  border-color: var(--green);
  background: rgba(53, 212, 122, 0.08);
  color: var(--green-strong);
}

.not-submitted-note {
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
}

.freq-clear-reminder {
  margin: 10px 0 0;
  font-size: 12.5px;
  color: var(--amber);
}

/* ---------- Spot Assist: handoff, copy, share, history ---------- */

a.btn.is-disabled {
  opacity: 0.4;
  pointer-events: none;
  cursor: not-allowed;
  text-decoration: none;
}

.pota-opened-status {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--green);
  background: rgba(53, 212, 122, 0.08);
  color: var(--green-strong);
  font-size: 13px;
}

.pota-return-banner {
  margin-top: 12px;
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--amber);
  background: rgba(245, 179, 66, 0.08);
}

.pota-return-banner p {
  margin: 0 0 10px;
  font-weight: 700;
  color: var(--amber);
}

.pota-return-sub {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 13px;
}

.copy-panel {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.copy-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  font-size: 13.5px;
}

.copy-label {
  flex: none;
  width: 74px;
  color: var(--text-dim);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.copy-value {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: var(--font-mono);
  color: var(--text);
}

.btn-copy-field {
  flex: none;
  appearance: none;
  border: 1px solid var(--border-strong);
  background: var(--surface-raised);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-size: 12px;
  min-height: 32px;
  cursor: pointer;
}

.btn-copy-field:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.copy-feedback {
  min-height: 16px;
  margin: 8px 0 0;
  font-size: 12.5px;
  color: var(--green-strong);
  text-align: center;
}

.spot-history-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.spot-history-row {
  border: 1px solid var(--border);
  background: var(--surface-raised);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 13px;
}

.spot-history-top {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  color: var(--text);
}

.spot-history-ref {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--green-strong);
}

.spot-history-action {
  flex: none;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  padding: 2px 6px;
  align-self: center;
}

.spot-history-detail {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
}

.spot-history-time {
  margin-top: 2px;
  font-size: 11px;
  color: var(--text-dim);
}

/* ---------- Favorite / recent rows ---------- */

.fav-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.fav-row .park-row {
  flex: 1;
}

.icon-btn {
  appearance: none;
  border: 1px solid var(--border-strong);
  background: var(--surface-raised);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  min-width: 44px;
  min-height: 44px;
  font-size: 18px;
  cursor: pointer;
  flex: none;
}

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

.star-btn.active {
  color: var(--amber);
  border-color: var(--amber);
}

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

.app-footer {
  text-align: center;
  font-size: 12px;
  color: var(--text-dim);
  padding: 18px 0 6px;
}

.app-footer a {
  color: var(--text-dim);
}

/* ---------- Utility ---------- */

.hidden {
  display: none !important;
}

.field-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
}

@media (min-width: 640px) {
  .app-shell {
    padding: 0 20px;
  }
}