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

:root {
  --navy:         #0f2d5e;
  --navy-light:   #1a4b8c;
  --blue:         #2563eb;
  --blue-light:   #dbeafe;
  --green:        #16a34a;
  --green-light:  #dcfce7;
  --amber:        #d97706;
  --bg:           #f1f5f9;
  --surface:      #ffffff;
  --text:         #0f172a;
  --text-muted:   #64748b;
  --border:       #e2e8f0;
  --shadow-sm:    0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow:       0 4px 12px rgba(0,0,0,.10), 0 2px 4px rgba(0,0,0,.06);
  --radius:       12px;
  --radius-sm:    8px;
  --font:         -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  overscroll-behavior: none;
}

/* ─── Views ────────────────────────────────────────────────────────────────── */
.view { min-height: 100dvh; display: flex; flex-direction: column; }
.view.hidden { display: none; }

/* ─── App Header ────────────────────────────────────────────────────────────── */
.app-header {
  background: var(--navy);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.3);
}

.header-inner {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Home header */
.home-header-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 20px 0 18px;
}

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

.logo-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.logo-text {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1;
}

.logo-tagline {
  font-size: 0.8rem;
  color: rgba(255,255,255,.6);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-left: 42px;
}

/* Checklist header */
.checklist-header-top {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0 10px;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: rgba(255,255,255,.12);
  color: #fff;
  border-radius: 10px;
  cursor: pointer;
  flex-shrink: 0;
  transition: background .15s;
  -webkit-tap-highlight-color: transparent;
}
.icon-btn:active { background: rgba(255,255,255,.22); }
.icon-btn svg { width: 20px; height: 20px; }

.header-title-group { flex: 1; min-width: 0; }

.checklist-aircraft-name {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.checklist-progress-text {
  font-size: 0.78rem;
  color: rgba(255,255,255,.65);
  margin-top: 2px;
}

.reset-btn {
  border: 1px solid rgba(255,255,255,.3);
  background: transparent;
  color: rgba(255,255,255,.85);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 8px;
  cursor: pointer;
  flex-shrink: 0;
  transition: background .15s;
  -webkit-tap-highlight-color: transparent;
}
.reset-btn:active { background: rgba(255,255,255,.15); }

/* Progress bar */
.progress-bar-wrap {
  padding: 0 0 14px;
}

.progress-bar {
  height: 5px;
  background: rgba(255,255,255,.2);
  border-radius: 99px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #60a5fa, #34d399);
  border-radius: 99px;
  transition: width .4s ease;
  width: 0%;
}

/* ─── Home View ─────────────────────────────────────────────────────────────── */
.home-main {
  flex: 1;
  max-width: 680px;
  margin: 0 auto;
  width: 100%;
  padding: 24px 16px 40px;
}

.section-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.aircraft-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.aircraft-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 16px;
  border: 2px solid transparent;
  transition: border-color .15s, box-shadow .15s, transform .1s;
  -webkit-tap-highlight-color: transparent;
}
.aircraft-card:active {
  transform: scale(0.985);
  border-color: var(--blue);
  box-shadow: var(--shadow);
}

.aircraft-card-icon {
  font-size: 2.4rem;
  line-height: 1;
  flex-shrink: 0;
}

.aircraft-card-info { flex: 1; min-width: 0; }

.aircraft-card-name {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.2;
}

.aircraft-card-reg {
  font-size: 0.82rem;
  color: var(--blue);
  font-weight: 600;
  margin-top: 2px;
}

.aircraft-card-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.aircraft-card-stats {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  flex-shrink: 0;
}

.aircraft-phase-count {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg);
  padding: 3px 8px;
  border-radius: 99px;
}

.aircraft-card-arrow {
  font-size: 1.2rem;
  color: var(--text-muted);
}

/* ─── Checklist View ─────────────────────────────────────────────────────────── */
.checklist-main {
  flex: 1;
  max-width: 680px;
  margin: 0 auto;
  width: 100%;
  padding: 16px 16px 40px;
}

.phases-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ─── Phase Card ─────────────────────────────────────────────────────────────── */
.phase-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  border: 2px solid transparent;
  transition: border-color .2s;
}

.phase-card.complete {
  border-color: var(--green);
}

.phase-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: background .12s;
}
.phase-header:active { background: var(--bg); }

.phase-icon { font-size: 1.35rem; flex-shrink: 0; line-height: 1; }

.phase-name {
  flex: 1;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.3;
}

.phase-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 99px;
  background: var(--bg);
  color: var(--text-muted);
  flex-shrink: 0;
  transition: background .2s, color .2s;
}

.phase-badge.complete {
  background: var(--green-light);
  color: var(--green);
}

.phase-badge.in-progress {
  background: var(--blue-light);
  color: var(--blue);
}

.phase-chevron {
  font-size: 1.1rem;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform .25s ease;
  line-height: 1;
}

.phase-card.open .phase-chevron {
  transform: rotate(90deg);
}

/* Phase Content (accordion) */
.phase-content { display: none; }
.phase-card.open .phase-content { display: block; }

.phase-content-inner {
  border-top: 1px solid var(--border);
  padding-bottom: 8px;
}

/* ─── Category Headers ────────────────────────────────────────────────────── */
.item-category-header {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 12px 16px 4px;
}

/* ─── Checklist Items ────────────────────────────────────────────────────── */
.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 11px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background .1s;
  -webkit-tap-highlight-color: transparent;
}
.checklist-item:last-child { border-bottom: none; }
.checklist-item:active { background: var(--bg); }

/* Hide native checkbox */
.checklist-item input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}

/* Custom checkbox */
.custom-checkbox {
  width: 26px;
  height: 26px;
  min-width: 26px;
  border-radius: 7px;
  border: 2px solid var(--border);
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
  transition: border-color .15s, background .15s;
}

.checklist-item.checked .custom-checkbox {
  border-color: var(--green);
  background: var(--green);
}

.check-icon {
  display: none;
  width: 15px;
  height: 15px;
  color: #fff;
}

.checklist-item.checked .check-icon { display: block; }

/* Item text area */
.item-body { flex: 1; min-width: 0; }

.item-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
}

.item-text {
  font-size: 0.92rem;
  line-height: 1.4;
  transition: color .15s;
}

.item-action {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--navy-light);
  white-space: nowrap;
  transition: color .15s;
}

.item-note {
  font-size: 0.77rem;
  color: var(--text-muted);
  margin-top: 4px;
  line-height: 1.5;
}

/* Checked state styles */
.checklist-item.checked .item-text {
  text-decoration: line-through;
  color: var(--text-muted);
}

.checklist-item.checked .item-action {
  text-decoration: line-through;
  color: var(--text-muted);
}

.checklist-item.checked .item-note {
  opacity: 0.6;
}

/* ─── Complete Phase Banner ──────────────────────────────────────────────── */
.phase-complete-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 16px;
  background: var(--green-light);
  color: var(--green);
  font-size: 0.88rem;
  font-weight: 700;
  border-top: 1px solid #bbf7d0;
}

/* ─── Confirm Modal ──────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 999;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0 0 env(safe-area-inset-bottom, 0);
}

.modal-overlay.hidden { display: none; }

.modal {
  background: var(--surface);
  border-radius: var(--radius) var(--radius) 0 0;
  width: 100%;
  max-width: 480px;
  padding: 24px 24px calc(24px + env(safe-area-inset-bottom, 0));
  box-shadow: 0 -4px 24px rgba(0,0,0,.15);
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.modal-body {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.5;
}

.modal-actions {
  display: flex;
  gap: 10px;
}

.btn {
  flex: 1;
  padding: 14px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: opacity .15s;
}
.btn:active { opacity: 0.8; }

.btn-secondary {
  background: var(--bg);
  color: var(--text);
}

.btn-danger {
  background: #ef4444;
  color: #fff;
}

/* ─── Responsive / Tablet ─────────────────────────────────────────────────── */
@media (min-width: 540px) {
  .phase-name { font-size: 1.05rem; }
  .checklist-item { padding: 13px 20px; }
  .item-text { font-size: 0.95rem; }
  .phase-header { padding: 18px 20px; }
  .item-category-header { padding: 14px 20px 4px; }
  .phase-complete-banner { padding: 14px 20px; }
}

@media (min-width: 680px) {
  .home-main, .checklist-main { padding-top: 28px; }
  .modal { border-radius: var(--radius); margin: auto; }
  .modal-overlay { align-items: center; }
}

/* ─── Safe-area padding (iPhone notch / home indicator) ──────────────────── */
.app-header { padding-top: env(safe-area-inset-top, 0); }

/* ─── Update check button ─────────────────────────────────────────────────── */
.update-check-btn { margin-left: auto; }

@keyframes spin { to { transform: rotate(360deg); } }
.update-check-btn.spinning svg { animation: spin .8s linear infinite; }

/* ─── Update available banner ─────────────────────────────────────────────── */
.update-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 500;
  background: var(--navy-light);
  color: #fff;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  padding-bottom: calc(12px + env(safe-area-inset-bottom, 0));
  box-shadow: 0 -2px 12px rgba(0,0,0,.25);
}
.update-banner.hidden { display: none; }

.update-banner-text { flex: 1; font-size: 0.9rem; font-weight: 600; }

.update-banner-reload {
  background: #fff;
  color: var(--navy);
  border: none;
  border-radius: 8px;
  padding: 7px 16px;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}
.update-banner-reload:active { opacity: 0.85; }

.update-banner-dismiss {
  background: none;
  border: none;
  color: rgba(255,255,255,.7);
  font-size: 1rem;
  cursor: pointer;
  padding: 4px 6px;
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}

/* ─── Item Groups (expandable sub-items, e.g. AROW) ─────────────────────── */
.item-group {
  border-bottom: 1px solid var(--border);
}
.item-group:last-child { border-bottom: none; }

.item-group-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 11px 16px;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: background .1s;
}
.item-group-header:active { background: var(--bg); }

.group-status {
  width: 26px;
  height: 26px;
  min-width: 26px;
  border-radius: 7px;
  border: 2px solid var(--border);
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
  flex-shrink: 0;
  transition: border-color .15s, background .15s, color .15s;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-muted);
}

.group-status.partial {
  border-color: var(--blue);
  background: var(--blue-light);
  color: var(--blue);
}

.group-status.complete {
  border-color: var(--green);
  background: var(--green);
  color: #fff;
}

.group-chevron {
  font-size: 1.1rem;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform .25s ease;
  line-height: 1;
  margin-top: 4px;
}

.item-group.open .group-chevron { transform: rotate(90deg); }

.subitems-list { display: none; }
.item-group.open .subitems-list { display: block; }

.checklist-item.subitem {
  background: var(--bg);
  padding-left: 28px;
}

@media (min-width: 540px) {
  .item-group-header { padding: 13px 20px; }
  .checklist-item.subitem { padding-left: 32px; }
}