/* ── Google Fonts ─────────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Sora:wght@400;500;600;700&display=swap');

/* ── Reset & base ────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0f1923;
  --surface:   #1a2535;
  --surface2:  #223044;
  --border:    #2d3f55;
  --amber:     #f0a500;
  --amber-dim: #c27f00;
  --amber-bg:  #1f1a0d;
  --text:      #e8edf3;
  --text-dim:  #8a9ab0;
  --green:     #34d399;
  --red:       #f87171;
  --blue:      #60a5fa;
  --font-num:  'DM Mono', monospace;
  --font-ui:   'Sora', sans-serif;
  --radius:    12px;
  --radius-sm: 8px;
  --safe-top:    env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}

/* ── Layout shell ────────────────────────────────────────────────────── */
#app {
  display: flex;
  flex-direction: column;
  height: 100svh;
  max-width: 480px;
  margin: 0 auto;
  position: relative;
}

/* ── Header ──────────────────────────────────────────────────────────── */
.header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: calc(var(--safe-top) + 14px) 16px 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.header h1 {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--amber);
  flex: 1;
}
.header-sync {
  font-size: 0.72rem;
  color: var(--text-dim);
  font-family: var(--font-num);
  text-align: right;
}
.header-sync.syncing { color: var(--amber); }
.header-sync.error   { color: var(--red); }

/* ── Nav tabs ────────────────────────────────────────────────────────── */
.nav {
  display: flex;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.nav-btn {
  flex: 1;
  padding: 12px 8px;
  background: none;
  border: none;
  color: var(--text-dim);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.nav-btn.active {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* ── Screen content ──────────────────────────────────────────────────── */
.screen {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: none;
  flex-direction: column;
  gap: 12px;
  padding-bottom: calc(16px + var(--safe-bottom));
}
.screen.active { display: flex; }

/* ── Cards / panels ──────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.card-title {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 12px;
}

/* ── Form elements ───────────────────────────────────────────────────── */
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.field label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.field input,
.field textarea,
.field select {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-num);
  font-size: 1rem;
  padding: 12px 14px;
  outline: none;
  width: 100%;
  transition: border-color 0.15s;
  -webkit-appearance: none;
  appearance: none;
}
.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: var(--amber);
}
.field input.prefilled {
  border-color: var(--green);
  color: var(--green);
}
.field textarea {
  resize: vertical;
  min-height: 72px;
  font-size: 0.9rem;
}
.field-hint {
  font-size: 0.72rem;
  color: var(--text-dim);
  font-family: var(--font-num);
}
.field-hint.warn { color: var(--amber); }
.field-hint.ok   { color: var(--green); }

/* ── Purpose input with suggestions ─────────────────────────────────── */
.purpose-wrap {
  position: relative;
}
.purpose-suggestions {
  position: absolute;
  top: calc(100% + 4px);
  left: 0; right: 0;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  z-index: 10;
  max-height: 180px;
  overflow-y: auto;
  display: none;
}
.purpose-suggestions.open { display: block; }
.purpose-item {
  padding: 10px 14px;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
}
.purpose-item:last-child { border-bottom: none; }
.purpose-item:hover, .purpose-item:active { background: var(--border); }

/* ── Toggle / special switch ─────────────────────────────────────────── */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.toggle-label {
  font-size: 0.9rem;
  color: var(--text);
}
.toggle-sub {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-top: 2px;
}
.switch {
  position: relative;
  width: 50px;
  height: 28px;
  flex-shrink: 0;
}
.switch input { opacity: 0; width: 0; height: 0; }
.switch-track {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 14px;
  transition: background 0.2s;
  cursor: pointer;
}
.switch input:checked + .switch-track { background: var(--amber); }
.switch-track::after {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 22px; height: 22px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.2s;
}
.switch input:checked + .switch-track::after { transform: translateX(22px); }

/* ── Per diem selector ───────────────────────────────────────────────── */
.perdiem-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.perdiem-btn {
  flex: 1;
  min-width: 60px;
  padding: 10px 6px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-family: var(--font-num);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  text-align: center;
  transition: all 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.perdiem-btn.selected {
  background: var(--amber-bg);
  border-color: var(--amber);
  color: var(--amber);
}

/* ── Primary button ──────────────────────────────────────────────────── */
.btn-primary {
  width: 100%;
  padding: 15px;
  background: var(--amber);
  border: none;
  border-radius: var(--radius);
  color: #0f1923;
  font-family: var(--font-ui);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.btn-primary:active { opacity: 0.85; }
.btn-primary:disabled { opacity: 0.45; cursor: default; }

.btn-secondary {
  width: 100%;
  padding: 13px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-dim);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.btn-secondary:hover { border-color: var(--text-dim); color: var(--text); }

/* ── Month picker row ────────────────────────────────────────────────── */
.month-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.month-row input[type="month"] {
  flex: 1;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-num);
  font-size: 0.95rem;
  padding: 10px 12px;
  outline: none;
}
.month-row input[type="month"]:focus { border-color: var(--amber); }
.btn-icon {
  padding: 10px 14px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 1.1rem;
  cursor: pointer;
  transition: border-color 0.15s;
  line-height: 1;
  -webkit-tap-highlight-color: transparent;
}
.btn-icon:hover { border-color: var(--amber); color: var(--amber); }

/* ── Trip list ───────────────────────────────────────────────────────── */
.trip-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.trip-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  cursor: pointer;
  transition: border-color 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.trip-item:active { border-color: var(--amber); }
.trip-date-badge {
  background: var(--surface2);
  border-radius: 6px;
  padding: 6px 8px;
  text-align: center;
  min-width: 44px;
  flex-shrink: 0;
}
.trip-date-day  { font-family: var(--font-num); font-size: 1.1rem; font-weight: 500; color: var(--amber); line-height: 1; }
.trip-date-dow  { font-size: 0.62rem; color: var(--text-dim); text-transform: uppercase; }
.trip-info { flex: 1; min-width: 0; }
.trip-purpose { font-size: 0.9rem; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.trip-meta    { font-size: 0.72rem; color: var(--text-dim); font-family: var(--font-num); margin-top: 3px; }
.trip-miles {
  font-family: var(--font-num);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  text-align: right;
  flex-shrink: 0;
}
.trip-miles.unknown { color: var(--text-dim); font-size: 0.8rem; }
.trip-miles.special { color: var(--amber); }
.trip-unsynced { color: var(--amber-dim); font-size: 0.65rem; margin-top: 2px; text-align: right; }

/* ── Stats summary ───────────────────────────────────────────────────── */
.stats-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 10px;
  text-align: center;
}
.stat-val  { font-family: var(--font-num); font-size: 1.25rem; font-weight: 500; color: var(--amber); }
.stat-label { font-size: 0.65rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.06em; margin-top: 3px; }

/* ── Push to Sheets button ───────────────────────────────────────────── */
.sheets-btn {
  width: 100%;
  padding: 15px;
  background: #1a3a1a;
  border: 1px solid #2d6b2d;
  border-radius: var(--radius);
  color: #34d399;
  font-family: var(--font-ui);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.sheets-btn:hover { background: #1f4a1f; }
.sheets-btn:disabled { opacity: 0.5; cursor: default; }

/* ── Toast ───────────────────────────────────────────────────────────── */
.toast-wrap {
  position: fixed;
  bottom: calc(20px + var(--safe-bottom));
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}
.toast {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-size: 0.85rem;
  color: var(--text);
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  animation: toast-in 0.2s ease;
  white-space: nowrap;
}
.toast.success { border-color: var(--green); color: var(--green); }
.toast.error   { border-color: var(--red);   color: var(--red); }
.toast.warn    { border-color: var(--amber);  color: var(--amber); }
@keyframes toast-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Modal / edit overlay ────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 50;
  display: none;
  align-items: flex-end;
  justify-content: center;
}
.modal-backdrop.open { display: flex; }
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius) var(--radius) 0 0;
  padding: 20px 16px calc(20px + var(--safe-bottom));
  width: 100%;
  max-width: 480px;
  max-height: 90svh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  animation: modal-in 0.25s ease;
}
@keyframes modal-in {
  from { transform: translateY(60px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.modal-title { font-size: 1rem; font-weight: 600; color: var(--amber); }
.modal-close {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 1.4rem;
  cursor: pointer;
  line-height: 1;
  padding: 2px 6px;
}
.modal-delete {
  background: none;
  border: 1px solid #5c2626;
  border-radius: var(--radius-sm);
  color: var(--red);
  font-family: var(--font-ui);
  font-size: 0.85rem;
  padding: 8px 14px;
  cursor: pointer;
}

/* ── Empty state ─────────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-dim);
  font-size: 0.9rem;
}
.empty-icon { font-size: 2.5rem; margin-bottom: 10px; }

/* ── Gap warning ─────────────────────────────────────────────────────── */
.gap-warning {
  background: var(--amber-bg);
  border: 1px solid var(--amber-dim);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.82rem;
  color: var(--amber);
  display: none;
}
.gap-warning.visible { display: block; }

/* ── Vehicle bar ─────────────────────────────────────────────────────── */
.vehicle-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
}
.vehicle-bar-label {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  flex-shrink: 0;
}
.vehicle-bar-name {
  flex: 1;
  font-family: var(--font-ui);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--amber);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.vehicle-bar-none {
  flex: 1;
  font-size: 0.88rem;
  color: var(--text-dim);
  font-style: italic;
}
.btn-swap {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-dim);
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 5px 10px;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.15s, color 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.btn-swap:hover { border-color: var(--amber); color: var(--amber); }

/* ── Vehicle list (settings screen) ─────────────────────────────────────── */
.vehicle-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}
.vehicle-item.default-vehicle { border-color: var(--amber); }
.vehicle-name { flex: 1; font-size: 0.95rem; font-weight: 500; }
.vehicle-default-badge {
  font-size: 0.65rem;
  color: var(--amber);
  background: var(--amber-bg);
  border: 1px solid var(--amber-dim);
  border-radius: 4px;
  padding: 2px 6px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.btn-set-default {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-dim);
  font-size: 0.72rem;
  padding: 4px 8px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.btn-set-default:hover { border-color: var(--amber); color: var(--amber); }
.btn-del-vehicle {
  background: none;
  border: none;
  color: #5c3333;
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px 6px;
  -webkit-tap-highlight-color: transparent;
}
.btn-del-vehicle:hover { color: var(--red); }

/* ── Vehicle picker modal list ───────────────────────────────────────────── */
.vehicle-pick-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.1s;
  -webkit-tap-highlight-color: transparent;
}
.vehicle-pick-item:last-child { border-bottom: none; }
.vehicle-pick-item:active { background: var(--surface2); }
.vehicle-pick-check {
  width: 20px; height: 20px;
  border: 2px solid var(--border);
  border-radius: 50%;
  flex-shrink: 0;
}
.vehicle-pick-item.selected .vehicle-pick-check {
  background: var(--amber);
  border-color: var(--amber);
}

/* ── Gear icon button ────────────────────────────────────────────────────── */
.btn-gear {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 1.15rem;
  cursor: pointer;
  padding: 2px 4px;
  line-height: 1;
  -webkit-tap-highlight-color: transparent;
  transition: color 0.15s;
}
.btn-gear:hover { color: var(--amber); }

/* ── Loading spinner ─────────────────────────────────────────────────── */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--amber);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin: 0 auto;
}
@keyframes spin { to { transform: rotate(360deg); } }