/* ============================================================
   Interactive Checklist — avionics-inspired UI
   ============================================================ */
:root {
  --bg-0: #070b12;
  --bg-1: #0b1220;
  --bg-2: #0f1a2b;
  --panel: #101c2e;
  --panel-2: #13233a;
  --line: #1e3350;
  --line-soft: #172740;

  --txt: #e7eef7;
  --txt-dim: #8ea3bd;
  --txt-faint: #5c718c;

  --accent: #22e3c8;      /* cyan/teal — active */
  --accent-2: #12b6ff;    /* blue */
  --go: #2fe08a;          /* green — checked/complete */
  --amber: #ffc043;       /* caution */
  --red: #ff5a5f;         /* warning / emergency */
  --on-accent: #04121b;   /* ink for text on accent/green surfaces (both themes) */

  --shadow: 0 18px 50px rgba(0, 0, 0, 0.55);
  --radius: 16px;

  --nav-w: 300px;
  --topbar-h: 60px;
  --actionbar-h: 68px;

  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-l: env(safe-area-inset-left, 0px);
  --safe-r: env(safe-area-inset-right, 0px);
}

/* ---------- light theme ---------- */
:root[data-theme="light"] {
  --bg-0: #e9eef4;
  --bg-1: #f4f7fb;
  --bg-2: #ffffff;
  --panel: #ffffff;
  --panel-2: #eef3f9;
  --line: #cbd8e6;
  --line-soft: #e2eaf3;

  --txt: #10233a;
  --txt-dim: #51667d;
  --txt-faint: #8195a9;

  --accent: #0bafa1;
  --accent-2: #0a84d4;
  --go: #12ac5f;
  --amber: #c9800a;
  --red: #e23b41;

  --shadow: 0 16px 44px rgba(30, 55, 90, 0.16);
}

:root[data-theme="light"] body {
  background:
    radial-gradient(1100px 640px at 82% -12%, rgba(10, 132, 212, 0.10), transparent 60%),
    radial-gradient(820px 560px at -5% 110%, rgba(11, 175, 161, 0.10), transparent 55%),
    var(--bg-0);
}

/* surfaces that were hardcoded dark */
:root[data-theme="light"] .topbar { background: linear-gradient(180deg, rgba(255,255,255,0.95), rgba(244,247,251,0.85)); }
:root[data-theme="light"] .actionbar { background: linear-gradient(0deg, rgba(255,255,255,0.97), rgba(255,255,255,0.72)); }
:root[data-theme="light"] .nav { background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(240,245,250,0.97)); }

/* advisory text tuned for light backgrounds */
:root[data-theme="light"] .advisory.caution { color: #7c4d05; }
:root[data-theme="light"] .advisory.warning { color: #a01f24; }
:root[data-theme="light"] .nav-group.type-emergency .nav-group-head { color: #c0343a; }
:root[data-theme="light"] .nav-group.type-abnormal .nav-group-head { color: #98680a; }
:root[data-theme="light"] .nav-group.type-briefing .nav-group-head { color: #0a68b4; }

/* keep the sketch surface dark so all pen colours stay visible */
:root[data-theme="light"] .canvas-wrap {
  background:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px) 0 0 / 100% 28px,
    #0f1a2b;
  border-color: #27394f;
}
:root[data-theme="light"] .canvas-hint { color: #8296aa; }

/* theme toggle icon swap (dark shows sun → tap for light; light shows moon) */
.ic-moon { display: none; }
.ic-sun { display: block; }
:root[data-theme="light"] .ic-sun { display: none; }
:root[data-theme="light"] .ic-moon { display: block; }

/* smooth theme cross-fade for the large chrome surfaces */
.topbar, .actionbar, .nav, .advisory, .modal, .scratch, .checklist-head, .quick-grid input, #scratchText {
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  color: var(--txt);
  background:
    radial-gradient(1200px 700px at 80% -10%, rgba(18, 182, 255, 0.10), transparent 60%),
    radial-gradient(900px 600px at 0% 110%, rgba(34, 227, 200, 0.08), transparent 55%),
    var(--bg-0);
  -webkit-font-smoothing: antialiased;
  user-select: none;
}

.mono {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", "Roboto Mono", Menlo, monospace;
}

/* ============================================================ layout */
.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  padding: var(--safe-t) var(--safe-r) 0 var(--safe-l);
}

.body {
  flex: 1;
  display: flex;
  min-height: 0;
  position: relative;
}

/* ============================================================ topbar */
.topbar {
  height: var(--topbar-h);
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 14px;
  background: linear-gradient(180deg, rgba(15, 26, 43, 0.95), rgba(11, 18, 32, 0.85));
  border-bottom: 1px solid var(--line-soft);
  backdrop-filter: blur(12px);
  position: relative;
  z-index: 30;
}

.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px;
  display: grid; place-items: center;
  color: var(--on-accent);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 4px 16px rgba(34, 227, 200, 0.35);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; min-width: 0; }
.brand-title { font-size: 13px; font-weight: 800; letter-spacing: 3px; color: var(--txt); }
.brand-sub { font-size: 11px; color: var(--txt-dim); letter-spacing: 1px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 160px; }

.topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }

.set-select-wrap { position: relative; display: inline-flex; }
.set-select {
  appearance: none;
  background: var(--panel-2);
  color: var(--txt);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 30px 9px 12px;
  font-size: 13px;
  font-weight: 600;
  max-width: 190px;
  cursor: pointer;
}
.set-select-wrap::after {
  content: "";
  position: absolute; right: 11px; top: 50%; width: 8px; height: 8px;
  border-right: 2px solid var(--txt-dim); border-bottom: 2px solid var(--txt-dim);
  transform: translateY(-70%) rotate(45deg); pointer-events: none;
}

.icon-btn {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 11px;
  border: 1px solid var(--line-soft);
  background: var(--panel);
  color: var(--txt-dim);
  cursor: pointer;
  transition: transform 0.12s ease, color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
.icon-btn:hover { color: var(--txt); border-color: var(--line); }
.icon-btn:active { transform: scale(0.92); }
.menu-toggle { display: none; }

/* ============================================================ nav */
.nav {
  width: var(--nav-w);
  flex: 0 0 var(--nav-w);
  border-right: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(11, 18, 32, 0.98), rgba(7, 11, 18, 0.98));
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.nav-scroll { overflow-y: auto; padding: 14px 12px calc(20px + var(--safe-b)); flex: 1; -webkit-overflow-scrolling: touch; }

.nav-group { margin-bottom: 18px; }
.nav-group-head {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 10px;
  font-size: 11px; font-weight: 800; letter-spacing: 1.6px; text-transform: uppercase;
  color: var(--txt-dim);
}
.nav-group-head .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); flex: 0 0 auto; }
.nav-group.type-emergency .dot { background: var(--red); }
.nav-group.type-abnormal .dot { background: var(--amber); }
.nav-group.type-briefing .dot { background: var(--accent-2); }
.nav-group.type-emergency .nav-group-head { color: #ff9ca0; }
.nav-group.type-abnormal .nav-group-head { color: #ffd98a; }
.nav-group.type-briefing .nav-group-head { color: #8fd3ff; }

.nav-item {
  display: flex; align-items: center; gap: 10px;
  width: 100%;
  padding: 12px 12px;
  margin: 3px 0;
  border-radius: 12px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--txt);
  font-size: 14.5px; font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}
.nav-item:hover { background: var(--panel); }
.nav-item:active { transform: scale(0.99); }
.nav-item.active { background: linear-gradient(135deg, rgba(34,227,200,0.16), rgba(18,182,255,0.10)); border-color: rgba(34,227,200,0.4); }
.nav-group.type-emergency .nav-item.active { background: rgba(255,90,95,0.14); border-color: rgba(255,90,95,0.45); }
.nav-group.type-abnormal .nav-item.active { background: rgba(255,192,67,0.13); border-color: rgba(255,192,67,0.4); }
.nav-group.type-briefing .nav-item.active { background: rgba(18,182,255,0.14); border-color: rgba(18,182,255,0.45); }

.nav-item .ni-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav-item .ni-badge {
  font-size: 11px; font-weight: 700; letter-spacing: 0.5px;
  color: var(--txt-dim);
  padding: 3px 8px; border-radius: 999px;
  background: var(--panel-2); border: 1px solid var(--line-soft);
  flex: 0 0 auto;
}
.nav-item.done .ni-badge { color: var(--go); border-color: rgba(47,224,138,0.4); background: rgba(47,224,138,0.12); }
.nav-item .ni-check { color: var(--go); display: none; }
.nav-item.done .ni-check { display: inline-flex; }

.nav-scrim { display: none; }

/* ============================================================ tab-bar layout */
/* Default (sidebar) layout hides the tab bar; the tabs layout hides the sidebar. */
.tabbar { display: none; }
.app.layout-tabs .nav { display: none; }
.app.layout-tabs .tabbar {
  display: block; flex: 0 0 auto;
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(15,26,43,0.55), transparent);
}
/* No slide-in drawer in tabs mode, so the hamburger is meaningless. */
.app.layout-tabs .menu-toggle { display: none; }

/* Level 1 — group tabs with a sliding underline */
.tabbar-groups {
  position: relative;
  display: flex; gap: 2px;
  padding: 6px 12px 0;
  overflow-x: auto; overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.tabbar-groups::-webkit-scrollbar { display: none; }
.tab {
  flex: 0 0 auto;
  padding: 12px 14px 13px;
  background: transparent; border: none;
  color: var(--txt-dim);
  font-size: 12.5px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase;
  white-space: nowrap; cursor: pointer;
  transition: color 0.15s ease;
}
.tab:hover { color: var(--txt); }
.tab.active { color: var(--txt); }
.tab.type-emergency.active { color: var(--red); }
.tab.type-abnormal.active { color: var(--amber); }
.tab.type-briefing.active { color: var(--accent-2); }
.tab-underline {
  position: absolute; left: 0; bottom: 0; height: 3px; width: 0;
  border-radius: 3px 3px 0 0; background: var(--accent);
  transform: translateX(0);
  transition: transform 0.28s cubic-bezier(0.2,0.8,0.2,1),
              width 0.28s cubic-bezier(0.2,0.8,0.2,1), background 0.2s ease;
  pointer-events: none;
}
.tab-underline.type-emergency { background: var(--red); }
.tab-underline.type-abnormal { background: var(--amber); }
.tab-underline.type-briefing { background: var(--accent-2); }

/* Level 2 — checklist chips for the selected group */
.tabbar-chips {
  display: flex; gap: 8px;
  padding: 18px 12px 12px;
  overflow-x: auto; overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.tabbar-chips::-webkit-scrollbar { display: none; }
.chip {
  flex: 0 0 auto;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 12px; border-radius: 999px;
  border: 1px solid var(--line-soft); background: var(--panel);
  color: var(--txt); font-size: 13.5px; font-weight: 600;
  white-space: nowrap; cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.1s, opacity 0.15s;
}
.chip:hover { border-color: var(--line); }
.chip:active { transform: scale(0.98); }
.chip.active { background: linear-gradient(135deg, rgba(34,227,200,0.16), rgba(18,182,255,0.10)); border-color: rgba(34,227,200,0.45); }
.chip-check { display: none; color: var(--go); }
.chip.done .chip-check { display: inline-flex; }
.chip.done { opacity: 0.6; }
.chip.done .chip-name { text-decoration: line-through; }
.chip-badge {
  font-size: 11px; font-weight: 700; color: var(--txt-dim);
  padding: 2px 7px; border-radius: 999px;
  background: var(--panel-2); border: 1px solid var(--line-soft);
}
.chip.done .chip-badge { color: var(--go); border-color: rgba(47,224,138,0.4); background: rgba(47,224,138,0.12); }

/* ============================================================ content */
.content {
  flex: 1; min-width: 0;
  display: flex; flex-direction: column;
  overflow: hidden;
  position: relative;
}
.items { overflow-x: hidden; }

.checklist-head {
  flex: 0 0 auto;
  display: flex; align-items: center; gap: 16px;
  padding: 20px 24px 14px;
  border-bottom: 1px solid var(--line-soft);
}
.ch-head-left { flex: 1; min-width: 0; }
.ch-badge {
  display: inline-block;
  font-size: 10.5px; font-weight: 800; letter-spacing: 1.8px;
  padding: 4px 10px; border-radius: 6px;
  color: var(--accent); background: rgba(34,227,200,0.12); border: 1px solid rgba(34,227,200,0.3);
  margin-bottom: 8px;
}
.ch-badge.emergency { color: var(--red); background: rgba(255,90,95,0.12); border-color: rgba(255,90,95,0.35); }
.ch-badge.abnormal { color: var(--amber); background: rgba(255,192,67,0.12); border-color: rgba(255,192,67,0.35); }
.ch-badge.briefing { color: var(--accent-2); background: rgba(18,182,255,0.12); border-color: rgba(18,182,255,0.35); }
.ch-title { margin: 0; font-size: 25px; font-weight: 800; letter-spacing: -0.3px; line-height: 1.15; }

.ch-head-right { flex: 0 0 auto; }
.progress-ring { position: relative; width: 52px; height: 52px; display: grid; place-items: center; }
.progress-ring svg { transform: rotate(-90deg); }
.ring-track { fill: none; stroke: var(--line); stroke-width: 4; }
.ring-fill {
  fill: none; stroke: var(--go); stroke-width: 4; stroke-linecap: round;
  stroke-dasharray: 119.38; stroke-dashoffset: 119.38;
  transition: stroke-dashoffset 0.5s cubic-bezier(0.2, 0.8, 0.2, 1), stroke 0.3s ease;
}
.progress-count {
  position: absolute; inset: 0; display: grid; place-items: center;
  font-size: 12px; font-weight: 800; color: var(--txt);
  font-variant-numeric: tabular-nums;
}

/* ============================================================ items */
.items {
  flex: 1; overflow-y: auto;
  padding: 16px 20px calc(28px + var(--safe-b));
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
}

.item {
  position: relative;
  display: flex; align-items: center; gap: 14px;
  padding: 15px 18px;
  margin: 8px 0;
  border-radius: 14px;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.08s ease;
  min-height: 58px;
}
.item::before {
  content: ""; position: absolute; left: 0; top: 12px; bottom: 12px; width: 3px;
  border-radius: 3px; background: transparent; transition: background 0.2s ease;
}
.item:active { transform: scale(0.995); }
/* Checked = done: grey the whole row out and strike the text through. */
.item.checked { background: var(--panel-2); border-color: var(--line-soft); opacity: 0.6; }
.item.checked::before { background: var(--txt-faint); }

.check {
  flex: 0 0 auto;
  width: 30px; height: 30px; border-radius: 9px;
  border: 2px solid var(--line);
  display: grid; place-items: center;
  color: var(--on-accent);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}
.item.checked .check { background: var(--txt-faint); border-color: var(--txt-faint); box-shadow: none; }
.check svg { width: 20px; height: 20px; }
.check path {
  stroke-dasharray: 24; stroke-dashoffset: 24;
  transition: stroke-dashoffset 0.25s ease 0.05s;
}
.item.checked .check path { stroke-dashoffset: 0; }

.item-body {
  flex: 1; min-width: 0;
  display: flex; align-items: baseline; gap: 8px;
}
.challenge {
  font-size: 16px; font-weight: 650; letter-spacing: 0.2px;
  color: var(--txt); text-transform: uppercase;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  flex: 0 1 auto; min-width: 0;
}
.leader {
  flex: 1; min-width: 14px;
  border-bottom: 2px dotted var(--line);
  transform: translateY(-4px);
}
.response {
  font-size: 16px; font-weight: 800; letter-spacing: 0.5px;
  color: var(--accent); text-transform: uppercase;
  white-space: nowrap; flex: 0 0 auto;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.item.checked .response { color: var(--txt-faint); text-decoration: line-through; }
.item.checked .challenge { color: var(--txt-faint); text-decoration: line-through; }

/* advisory rows (note / caution / warning) */
.advisory {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 13px 16px; margin: 8px 0;
  border-radius: 12px; font-size: 14.5px; line-height: 1.4;
  border: 1px solid var(--line-soft);
}
.advisory .adv-icon { flex: 0 0 auto; margin-top: 1px; }
.advisory.note { background: rgba(142,163,189,0.07); color: var(--txt-dim); border-style: dashed; }
.advisory.note .adv-icon { color: var(--txt-dim); }
.advisory.caution { background: rgba(255,192,67,0.08); color: #ffdf9e; border-color: rgba(255,192,67,0.3); }
.advisory.caution .adv-icon { color: var(--amber); }
.advisory.warning { background: rgba(255,90,95,0.08); color: #ffc2c4; border-color: rgba(255,90,95,0.35); font-weight: 600; }
.advisory.warning .adv-icon { color: var(--red); }
.advisory .adv-label { font-weight: 800; letter-spacing: 0.5px; text-transform: uppercase; font-size: 12px; margin-right: 6px; }

.empty-state {
  height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 14px; color: var(--txt-faint); text-align: center; padding: 40px;
}
.empty-icon { color: var(--line); }
.empty-state p { font-size: 15px; margin: 0; }

/* ============================================================ complete banner */
.complete-banner {
  position: absolute; left: 50%; bottom: calc(20px + var(--safe-b));
  transform: translateX(-50%) translateY(20px);
  opacity: 0; pointer-events: none;
  transition: opacity 0.35s ease, transform 0.35s cubic-bezier(0.2,0.8,0.2,1);
}
.complete-banner.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.cb-inner {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 26px; border-radius: 999px;
  background: linear-gradient(135deg, rgba(47,224,138,0.95), rgba(34,227,200,0.9));
  color: #05231a; font-weight: 800; letter-spacing: 1.5px; font-size: 14px;
  box-shadow: 0 12px 40px rgba(47,224,138,0.45);
}

/* ============================================================ actionbar */
.actionbar {
  height: calc(var(--actionbar-h) + var(--safe-b));
  padding-bottom: var(--safe-b);
  flex: 0 0 auto;
  display: flex; align-items: center; gap: 10px;
  padding-left: 16px; padding-right: 16px;
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(0deg, rgba(11,18,32,0.96), rgba(11,18,32,0.7));
  backdrop-filter: blur(12px);
}
.act-btn {
  height: 46px; flex: 1;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: 13px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--txt);
  font-size: 15px; font-weight: 700;
  cursor: pointer;
  transition: transform 0.1s ease, background 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}
.act-btn:active { transform: scale(0.96); }
.act-btn.reset { flex: 0 0 auto; padding: 0 18px; color: var(--txt-dim); }
.act-btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: var(--on-accent); border-color: transparent; }
.act-btn.primary.pulse { animation: pulse 1.4s ease-in-out infinite; }
.act-btn:disabled { opacity: 0.35; pointer-events: none; }
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34,227,200,0.5); }
  50% { box-shadow: 0 0 0 10px rgba(34,227,200,0); }
}

/* ============================================================ popover */
.popover {
  position: fixed; top: calc(var(--topbar-h) + var(--safe-t) + 6px); right: 14px;
  width: 260px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 8px;
  z-index: 60;
  display: flex; flex-direction: column; gap: 2px;
  animation: pop 0.15s ease;
}
@keyframes pop { from { opacity: 0; transform: translateY(-8px) scale(0.98); } }
.popover button {
  display: flex; align-items: center; gap: 8px;
  padding: 11px 12px; border-radius: 9px;
  background: transparent; border: none; color: var(--txt);
  font-size: 14px; font-weight: 500; text-align: left; cursor: pointer;
}
.popover button:hover { background: var(--panel); }
.popover button.danger { color: var(--red); }
.popover-sep { height: 1px; background: var(--line-soft); margin: 6px 4px; }
.popover-switch {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 12px; font-size: 14px; color: var(--txt-dim);
}
.popover-switch input { width: 40px; height: 24px; }
.popover-row {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 9px 12px; font-size: 14px; color: var(--txt-dim);
}
.popover .layout-seg {
  display: flex; gap: 4px;
  background: var(--panel); border: 1px solid var(--line-soft);
  border-radius: 10px; padding: 3px;
}
.popover .layout-seg button {
  padding: 6px 12px; border: none; border-radius: 7px;
  background: transparent; color: var(--txt-dim);
  font-size: 13px; font-weight: 700; cursor: pointer;
}
.popover .layout-seg button:hover { background: transparent; color: var(--txt); }
.popover .layout-seg button.active { background: var(--panel-2); color: var(--txt); box-shadow: inset 0 0 0 1px var(--line); }

/* ============================================================ modals */
.modal-scrim {
  position: fixed; inset: 0; z-index: 80;
  background: rgba(4, 8, 14, 0.66);
  backdrop-filter: blur(4px);
  display: grid; place-items: center;
  padding: calc(20px + var(--safe-t)) 16px calc(20px + var(--safe-b));
  animation: fade 0.15s ease;
}
@keyframes fade { from { opacity: 0; } }
.modal {
  width: 100%; max-width: 680px; max-height: 100%;
  display: flex; flex-direction: column;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: rise 0.2s cubic-bezier(0.2,0.8,0.2,1);
}
.modal.small { max-width: 460px; }
@keyframes rise { from { opacity: 0; transform: translateY(16px); } }
.modal-head {
  flex: 0 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 18px 14px;
  border-bottom: 1px solid var(--line-soft);
}
.modal-head h2 { margin: 0; font-size: 18px; font-weight: 800; letter-spacing: 0.3px; }
.modal-body { flex: 1; overflow-y: auto; padding: 18px; -webkit-overflow-scrolling: touch; }
.modal-foot {
  flex: 0 0 auto;
  display: flex; align-items: center; justify-content: flex-end; gap: 10px;
  padding: 14px 18px; border-top: 1px solid var(--line-soft);
}
.modal-foot .hint { margin-right: auto; font-size: 12.5px; color: var(--txt-faint); }

.btn {
  height: 42px; padding: 0 20px; border-radius: 12px;
  font-size: 14.5px; font-weight: 700; cursor: pointer;
  border: 1px solid var(--line); background: var(--panel); color: var(--txt);
  transition: transform 0.1s ease, opacity 0.15s;
}
.btn:active { transform: scale(0.96); }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: var(--on-accent); border-color: transparent; }
.btn.ghost { background: transparent; color: var(--txt-dim); }
.btn.small { height: 34px; padding: 0 12px; font-size: 13px; }

/* fields */
.field { margin-bottom: 16px; }
.field > label { display: block; font-size: 12px; font-weight: 700; letter-spacing: 0.6px; text-transform: uppercase; color: var(--txt-dim); margin-bottom: 7px; }
.field input[type="text"] {
  width: 100%; height: 46px; padding: 0 14px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 11px;
  color: var(--txt); font-size: 15px; font-weight: 500;
  outline: none; transition: border-color 0.15s;
}
.field input[type="text"]:focus { border-color: var(--accent); }

.seg { display: flex; gap: 6px; background: var(--panel); border: 1px solid var(--line-soft); border-radius: 12px; padding: 4px; }
.seg button {
  flex: 1; height: 38px; border: none; border-radius: 9px;
  background: transparent; color: var(--txt-dim); font-size: 13.5px; font-weight: 700; cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.seg button.active { background: var(--panel-2); color: var(--txt); box-shadow: inset 0 0 0 1px var(--line); }

/* builder tree */
.b-set-meta { display: flex; gap: 10px; margin-bottom: 18px; }
.b-set-meta input { flex: 1; }

.b-group {
  border: 1px solid var(--line-soft); border-radius: 14px;
  margin-bottom: 14px; overflow: hidden; background: rgba(16,28,46,0.5);
}
.b-group-head {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 12px; background: var(--panel);
}
.b-group-head .b-type-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); }
.b-group-head.emergency .b-type-dot { background: var(--red); }
.b-group-head.abnormal .b-type-dot { background: var(--amber); }
.b-group-head.briefing .b-type-dot { background: var(--accent-2); }
.b-group-head input.b-title { flex: 1; height: 38px; background: transparent; border: none; color: var(--txt); font-size: 15px; font-weight: 700; outline: none; }
.b-group-head select {
  appearance: none; background: var(--panel-2); border: 1px solid var(--line-soft);
  color: var(--txt-dim); border-radius: 8px; padding: 6px 10px; font-size: 12px; font-weight: 700; cursor: pointer;
}

.b-checklists { padding: 8px 10px 12px; }
.b-checklist {
  border: 1px solid var(--line-soft); border-radius: 11px; margin: 8px 0; overflow: hidden;
}
.b-cl-head { display: flex; align-items: center; gap: 6px; padding: 8px 10px; background: rgba(19,35,58,0.5); }
.b-cl-head input { flex: 1; height: 34px; background: transparent; border: none; color: var(--txt); font-size: 14px; font-weight: 600; outline: none; }

.b-items { padding: 6px 10px 10px; display: flex; flex-direction: column; gap: 5px; }
.b-item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; border-radius: 9px; background: var(--panel);
  border: 1px solid var(--line-soft); font-size: 13.5px;
}
.b-item .bi-text { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.b-item .bi-tag { font-size: 10px; font-weight: 800; letter-spacing: 0.5px; padding: 2px 7px; border-radius: 5px; text-transform: uppercase; flex: 0 0 auto; }
.bi-tag.item { color: var(--accent); background: rgba(34,227,200,0.12); }
.bi-tag.note { color: var(--txt-dim); background: rgba(142,163,189,0.12); }
.bi-tag.caution { color: var(--amber); background: rgba(255,192,67,0.12); }
.bi-tag.warning { color: var(--red); background: rgba(255,90,95,0.12); }
.bi-resp { color: var(--txt-dim); font-weight: 700; flex: 0 0 auto; }

.mini-btn {
  width: 30px; height: 30px; flex: 0 0 auto;
  display: grid; place-items: center; border-radius: 8px;
  background: transparent; border: 1px solid var(--line-soft); color: var(--txt-dim);
  cursor: pointer; font-size: 15px; line-height: 1;
}
.mini-btn:hover { color: var(--txt); border-color: var(--line); }
.mini-btn.danger:hover { color: var(--red); border-color: rgba(255,90,95,0.4); }

.b-add-row { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; }
.b-add-row .btn { flex: 1; min-width: 120px; }

/* toast */
.toast {
  position: fixed; left: 50%; bottom: calc(84px + var(--safe-b));
  transform: translateX(-50%) translateY(10px); opacity: 0;
  background: var(--panel-2); color: var(--txt);
  border: 1px solid var(--line); border-radius: 12px;
  padding: 12px 20px; font-size: 14px; font-weight: 600;
  box-shadow: var(--shadow); z-index: 100;
  transition: opacity 0.25s, transform 0.25s;
  pointer-events: none; max-width: 90vw; text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ============================================================ scratchpad */
.icon-btn { position: relative; }
.dot-badge {
  position: absolute; top: 7px; right: 7px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent); border: 2px solid var(--bg-1);
  box-shadow: 0 0 8px rgba(34,227,200,0.7);
}

.scratch-scrim {
  position: fixed; inset: 0; z-index: 70;
  background: rgba(4,8,14,0.5);
  opacity: 0; pointer-events: none;
  transition: opacity 0.25s ease;
}
.scratch-scrim.open { opacity: 1; pointer-events: auto; }

.scratch {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: 75;
  width: min(960px, 75vw);
  display: flex; flex-direction: column;
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  border-left: 1px solid var(--line);
  box-shadow: -20px 0 60px rgba(0,0,0,0.5);
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.2,0.8,0.2,1);
  pointer-events: none;
  padding-top: var(--safe-t); padding-bottom: var(--safe-b); padding-right: var(--safe-r);
}
.scratch.open { transform: translateX(0); pointer-events: auto; }

.scratch-head {
  flex: 0 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 14px 12px 18px;
  border-bottom: 1px solid var(--line-soft);
}
.scratch-title { display: flex; align-items: center; gap: 9px; color: var(--accent); }
.scratch-title span { font-size: 13px; font-weight: 800; letter-spacing: 2.5px; }

.scratch-seg { margin: 14px 16px 4px; }

.scratch-body { flex: 1; min-height: 0; display: flex; flex-direction: column; padding: 12px 16px; }
.scratch-notes { flex: 1; min-height: 0; display: flex; flex-direction: column; gap: 12px; }

.quick-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; flex: 0 0 auto; }
.qf { display: flex; flex-direction: column; gap: 5px; }
.qf-top { display: flex; align-items: center; justify-content: space-between; gap: 6px; padding-left: 2px; min-height: 16px; }
.qf-label { font-size: 10.5px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; color: var(--txt-dim); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.qf-del { flex: 0 0 auto; width: 20px; height: 20px; border: none; border-radius: 6px; background: transparent; color: var(--txt-faint); font-size: 16px; line-height: 1; cursor: pointer; opacity: 0.5; transition: opacity 0.15s, color 0.15s; }
.qf-del:hover { opacity: 1; color: var(--red); }
.qf-input {
  height: 44px; padding: 0 12px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 11px;
  color: var(--txt); font-size: 16px; font-weight: 700; letter-spacing: 0.5px;
  outline: none; transition: border-color 0.15s;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.qf-input:focus { border-color: var(--accent); }
.qf-add {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
  min-height: 66px; border: 1px dashed var(--line); border-radius: 11px;
  background: transparent; color: var(--txt-dim); cursor: pointer;
  font-size: 18px; font-weight: 700; transition: border-color 0.15s, color 0.15s;
}
.qf-add span { font-size: 10.5px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; }
.qf-add:hover { border-color: var(--accent); color: var(--accent); }

#scratchText {
  flex: 1; min-height: 120px; resize: none;
  padding: 14px; border-radius: 13px;
  background: var(--panel); border: 1px solid var(--line);
  color: var(--txt); font-size: 15px; line-height: 1.6;
  outline: none; transition: border-color 0.15s;
  user-select: text; -webkit-user-select: text;
}
#scratchText:focus { border-color: var(--accent); }

/* sketch */
.scratch-sketch { flex: 1; min-height: 0; display: flex; flex-direction: column; gap: 12px; }
.sketch-tools { flex: 0 0 auto; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.sketch-tools .pen {
  width: 34px; height: 34px; border-radius: 50%; cursor: pointer;
  border: 2px solid transparent; background: var(--pen);
  box-shadow: inset 0 0 0 3px var(--bg-1); transition: transform 0.1s, border-color 0.15s;
}
.sketch-tools .pen.active { border-color: var(--pen); box-shadow: inset 0 0 0 2px var(--bg-1), 0 0 12px var(--pen); transform: scale(1.08); }
.sketch-tools .tool {
  width: 40px; height: 40px; margin-left: 2px;
  display: grid; place-items: center; border-radius: 11px;
  background: var(--panel); border: 1px solid var(--line-soft); color: var(--txt-dim); cursor: pointer;
}
.sketch-tools .tool.active { color: var(--txt); border-color: var(--accent); background: var(--panel-2); }
.sketch-tools .tool.danger { margin-left: auto; }
.sketch-tools .tool.danger:hover { color: var(--red); border-color: rgba(255,90,95,0.4); }

.canvas-wrap {
  position: relative; flex: 1; min-height: 160px;
  border-radius: 14px; overflow: hidden;
  background:
    linear-gradient(var(--line-soft) 1px, transparent 1px) 0 0 / 100% 28px,
    var(--panel);
  border: 1px solid var(--line);
}
#sketchCanvas { position: absolute; inset: 0; width: 100%; height: 100%; touch-action: none; display: block; cursor: crosshair; }
.canvas-hint {
  position: absolute; inset: 0; display: grid; place-items: center;
  color: var(--txt-faint); font-size: 14px; pointer-events: none; transition: opacity 0.2s;
}

.scratch-foot {
  flex: 0 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-top: 1px solid var(--line-soft);
}
.scratch-foot .hint { font-size: 12.5px; color: var(--txt-faint); }
.scratch-foot .hint.saving { color: var(--accent); }

/* ============================================================ responsive */
@media (max-width: 820px) {
  .menu-toggle { display: grid; }
  .brand-sub { max-width: 100px; }
  .set-select { max-width: 130px; }
  .nav {
    position: absolute; top: 0; bottom: 0; left: 0; z-index: 50;
    transform: translateX(-100%);
    transition: transform 0.28s cubic-bezier(0.2,0.8,0.2,1);
    box-shadow: var(--shadow);
    width: min(320px, 84vw); flex-basis: auto;
  }
  .app.nav-open .nav { transform: translateX(0); }
  .nav-scrim {
    display: block; position: absolute; inset: 0; z-index: 40;
    background: rgba(4,8,14,0.5); opacity: 0; pointer-events: none;
    transition: opacity 0.25s;
  }
  .app.nav-open .nav-scrim { opacity: 1; pointer-events: auto; }
  .checklist-head { padding: 16px 18px 12px; }
  .ch-title { font-size: 21px; }
  .items { padding: 14px 16px calc(24px + var(--safe-b)); }
}

@media (max-width: 480px) {
  .brand-sub { display: none; }
  .challenge, .response { font-size: 15px; }
  .act-btn span { font-size: 14px; }
  .scratch { width: 94vw; }
}

/* larger tap feel on real touch devices */
@media (hover: none) {
  .item { padding: 17px 18px; }
}

/* ============================================================ PDF documents */
.pdf-scrim {
  position: fixed; inset: 0; z-index: 82;
  background: rgba(4,8,14,0.5);
  opacity: 0; pointer-events: none;
  transition: opacity 0.25s ease;
}
.pdf-scrim.open { opacity: 1; pointer-events: auto; }

.pdf-panel {
  position: fixed; inset: 0; z-index: 85;
  display: flex; flex-direction: column;
  background: linear-gradient(180deg, var(--bg-1), var(--bg-0));
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.2,0.8,0.2,1);
  pointer-events: none;
  padding-top: var(--safe-t); padding-bottom: var(--safe-b);
  padding-left: var(--safe-l); padding-right: var(--safe-r);
}
.pdf-panel.open { transform: translateY(0); pointer-events: auto; }

.pdf-head {
  flex: 0 0 auto;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 14px 14px 12px 18px;
  border-bottom: 1px solid var(--line-soft);
}
.pdf-head-title { display: flex; align-items: center; gap: 9px; color: var(--accent-2); }
.pdf-head-title span { font-size: 13px; font-weight: 800; letter-spacing: 2.5px; }
.pdf-head-actions { display: flex; align-items: center; gap: 8px; }

/* library */
.pdf-library { flex: 1; min-height: 0; overflow-y: auto; -webkit-overflow-scrolling: touch; padding: 14px 16px calc(16px + var(--safe-b)); }
.pdf-list { display: flex; flex-direction: column; gap: 8px; max-width: 820px; margin: 0 auto; }
.pdf-row {
  display: flex; align-items: center; gap: 6px;
  background: var(--panel); border: 1px solid var(--line-soft); border-radius: 12px;
  padding: 6px 8px 6px 6px;
}
.pdf-open {
  flex: 1; min-width: 0;
  display: flex; align-items: center; gap: 12px;
  background: transparent; border: none; color: var(--txt);
  text-align: left; cursor: pointer; padding: 8px; border-radius: 9px;
}
.pdf-open:active { transform: scale(0.995); }
.pdf-ic {
  flex: 0 0 auto; width: 36px; height: 36px;
  display: grid; place-items: center;
  color: var(--accent-2); background: rgba(18,182,255,0.12); border-radius: 9px;
}
.pdf-info { min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.pdf-name { font-size: 15px; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pdf-sub { font-size: 12px; color: var(--txt-faint); }
.pdf-mini {
  flex: 0 0 auto; width: 36px; height: 36px; border-radius: 9px;
  border: 1px solid var(--line-soft); background: var(--panel-2); color: var(--txt-dim);
  font-size: 14px; cursor: pointer;
  transition: transform 0.1s ease, color 0.15s, border-color 0.15s;
}
.pdf-mini:active { transform: scale(0.92); }
.pdf-mini.danger:hover { color: var(--red); border-color: rgba(255,90,95,0.4); }

.pdf-empty {
  max-width: 420px; margin: 12vh auto 0; text-align: center; color: var(--txt-faint);
  display: flex; flex-direction: column; align-items: center; gap: 12px;
}
.pdf-empty p { margin: 0; font-size: 15px; }

/* viewer */
.pdf-viewer { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.pdf-bar {
  flex: 0 0 auto;
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px; border-bottom: 1px solid var(--line-soft); background: var(--bg-1);
}
.pdf-docname { flex: 1; min-width: 0; font-size: 14px; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pdf-pageinfo { flex: 0 0 auto; font-size: 12.5px; color: var(--txt-dim); font-variant-numeric: tabular-nums; }
.pdf-zoom { flex: 0 0 auto; display: flex; align-items: center; gap: 4px; }

.pdf-pages {
  flex: 1; min-height: 0; overflow: auto; -webkit-overflow-scrolling: touch; position: relative;
  padding: 16px 12px calc(24px + var(--safe-b));
  background: var(--bg-0);
}
.pdf-pages-inner { transform-origin: 0 0; }
.pdf-page {
  position: relative; margin: 0 auto 14px;
  background: #fff; border-radius: 4px; box-shadow: 0 6px 20px rgba(0,0,0,0.35); overflow: hidden;
}
.pdf-page:last-child { margin-bottom: 0; }
.pdf-page canvas { display: block; width: 100%; height: auto; }
.pdf-msg { margin: 12vh auto; max-width: 340px; text-align: center; color: var(--txt-faint); font-size: 15px; }

/* ============================================================ confirm/prompt modal */
#uiModalScrim { z-index: 95; }
.ui-modal-msg { margin: 6px 2px 0; font-size: 15.5px; line-height: 1.45; color: var(--txt); }
.ui-modal-input {
  width: 100%; box-sizing: border-box; height: 46px; margin-top: 14px; padding: 0 12px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 11px;
  color: var(--txt); font-size: 16px; font-weight: 600; outline: none; transition: border-color 0.15s;
}
.ui-modal-input:focus { border-color: var(--accent); }
.btn.danger { background: var(--red); color: #fff; border-color: transparent; }