/* ============================================================
   GV Science — Design Tokens & Base
   ============================================================ */

:root {
  /* Brand palette */
  --c-primary:        #7A9B76;
  --c-primary-soft:   #CFE1C9;
  --c-primary-deep:   #5F8159;
  /* Accent — coral pink, matched to the crab mascot */
  --c-accent:         #F26B1D;
  --c-accent-soft:    #F7C59F;
    --c-bg:             #F9F7F2;
  --c-bg-warm:        #F4EFE6;
  --c-surface:        #FFFFFF;
  --c-surface-glass:  rgba(255, 255, 255, 0.72);
  --c-surface-glass-strong: rgba(255, 255, 255, 0.86);
  --c-text:           #2D3A2A;
  --c-text-sub:       #6B7869;
  --c-text-mute:      #97A092;
  --c-divider:        #E8E5DE;
  --c-divider-soft:   rgba(45, 58, 42, 0.06);
  --c-danger:         #C95B3B;

  /* Type */
  --f-jp:  "Hiragino Sans", "ヒラギノ角ゴシック", "Yu Gothic UI", "Noto Sans JP", system-ui, sans-serif;
  --f-en:  "IBM Plex Sans", "Inter", "SF Pro Text", -apple-system, system-ui, sans-serif;
  --f-mono: "IBM Plex Mono", "SF Mono", ui-monospace, monospace;

  /* Density */
  --row-h:    64px;
  --row-gap:  10px;
  --pad-x:    20px;
  --card-r:   22px;
  --pill-r:   999px;

  /* Shadows */
  --sh-card:  0 1px 0 rgba(255,255,255,0.6) inset, 0 8px 24px -10px rgba(45,58,42,0.18), 0 2px 6px -2px rgba(45,58,42,0.08);
  --sh-cta:   0 1px 0 rgba(255,255,255,0.35) inset, 0 10px 24px -8px rgba(122,155,118,0.55), 0 2px 6px -2px rgba(95,129,89,0.3);
  --sh-pop:   0 1px 0 rgba(255,255,255,0.6) inset, 0 20px 60px -16px rgba(45,58,42,0.28);
}

/* density variants */
.dens-comfy   { --row-h: 72px; --row-gap: 14px; --pad-x: 22px; }
.dens-regular { --row-h: 64px; --row-gap: 10px; --pad-x: 20px; }
.dens-tight   { --row-h: 54px; --row-gap: 8px;  --pad-x: 18px; }

* { box-sizing: border-box; }

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

.gv-root {
  font-family: var(--f-jp);
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.gv-en, .gv-num {
  font-family: var(--f-en);
  font-feature-settings: "ss01", "cv11";
  letter-spacing: -0.01em;
}

/* ============================================================
   App shell (inside iOS frame)
   ============================================================ */

.app {
  position: relative;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(120% 60% at 12% 0%, rgba(207,225,201,0.55) 0%, rgba(207,225,201,0) 55%),
    radial-gradient(110% 50% at 100% 100%, rgba(247,197,159,0.35) 0%, rgba(247,197,159,0) 50%),
    var(--c-bg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.app-scroll {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: none;
  padding-bottom: 56px;
}
.app-scroll::-webkit-scrollbar { display: none; }

/* status-bar gutter (iOS frame draws status bar over top) */
.safe-top { height: 54px; flex-shrink: 0; }

/* ============================================================
   Top nav (in-app, sits below status bar)
   ============================================================ */
.nav {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px var(--pad-x) 4px;
  min-height: 44px;
  position: relative;
  z-index: 5;
}
.nav-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border: none;
  background: transparent;
  color: var(--c-primary-deep);
  font-family: var(--f-jp);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  padding: 6px 4px 6px 0;
  letter-spacing: 0.02em;
}
.nav-back svg { transform: translateY(0.5px); }
.nav-back:hover { color: var(--c-primary); }
.nav-crumb {
  flex: 1;
  font-size: 12px;
  color: var(--c-text-mute);
  letter-spacing: 0.04em;
  text-align: right;
  font-family: var(--f-en);
  text-transform: uppercase;
}

/* page title (large, Apple-like) */
.page-head {
  padding: 8px var(--pad-x) 18px;
}
.page-eyebrow {
  font-family: var(--f-en);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-primary-deep);
  margin-bottom: 8px;
  font-weight: 600;
}
.page-title {
  font-size: 30px;
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0;
}
.page-title .accent { color: var(--c-accent); }
.page-sub {
  margin-top: 6px;
  color: var(--c-text-sub);
  font-size: 14px;
  line-height: 1.55;
}

/* ============================================================
   Cards / Lists
   ============================================================ */
.glass {
  background: var(--c-surface-glass);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  backdrop-filter: blur(18px) saturate(140%);
  border: 0.5px solid rgba(255,255,255,0.65);
  box-shadow: var(--sh-card);
  border-radius: var(--card-r);
}

.group {
  margin: 0 var(--pad-x) 18px;
}
.group-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 4px 4px 8px;
}
.group-label .label-text {
  font-family: var(--f-en);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-text-sub);
  font-weight: 600;
}
.group-label .label-aux {
  font-size: 12px;
  color: var(--c-text-mute);
}

/* List row */
.row {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: var(--row-h);
  padding: 12px var(--pad-x);
  position: relative;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s;
}
.row + .row::before {
  content: "";
  position: absolute;
  top: 0;
  left: calc(var(--pad-x) + 44px);
  right: var(--pad-x);
  height: 0.5px;
  background: var(--c-divider);
}
.row:hover { background: rgba(255,255,255,0.45); }
.row:active { background: rgba(207,225,201,0.4); }

.row-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--c-primary-soft);
  color: var(--c-primary-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--f-en);
  font-size: 14px;
  font-weight: 600;
  flex-shrink: 0;
}
.row-icon.accent { background: var(--c-accent-soft); color: #B14A0C; }
.row-icon.mute   { background: #E8E5DE; color: var(--c-text-sub); }
.row-icon.dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--c-primary);
}
.row-icon.dot.accent { background: var(--c-accent); }
.row-icon.dot.mute   { background: var(--c-text-mute); }

.row-body { flex: 1; min-width: 0; }
.row-title {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: 0.01em;
  color: var(--c-text);
  display: flex;
  align-items: center;
  gap: 8px;
}
.row-sub {
  margin-top: 3px;
  font-size: 13px;
  color: var(--c-text-sub);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 10px;
}
.row-sub > * { white-space: nowrap; }
.row-sub .gv-en, .row-sub .gv-num { font-size: 12.5px; }
.row-trail {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--c-text-mute);
  flex-shrink: 0;
}
.chev {
  width: 8px; height: 14px;
  flex-shrink: 0;
  opacity: 0.5;
}
.chev path { stroke: currentColor; }

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--f-en);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 2px 8px;
  border-radius: 999px;
  line-height: 1.5;
  white-space: nowrap;
}
.badge.new      { background: var(--c-accent); color: #fff; }
.badge.material { background: var(--c-primary-soft); color: var(--c-primary-deep); }
.badge.video    { background: rgba(122,155,118,0.18); color: var(--c-primary-deep); }
.badge.outline  { border: 1px solid var(--c-divider); color: var(--c-text-sub); }
.badge.dot { padding-left: 5px; padding-right: 10px; }
.badge.dot::before {
  content: "";
  width: 5px; height: 5px; border-radius: 999px;
  background: currentColor;
  display: inline-block;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: 14px;
  padding: 14px 18px;
  font-family: var(--f-jp);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.15s;
}
.btn:active { transform: scale(0.985); }
.btn-primary {
  background: linear-gradient(180deg, #88a983 0%, #7A9B76 100%);
  color: #fff;
  box-shadow: var(--sh-cta);
}
.btn-accent {
  background: linear-gradient(180deg, #F47A30 0%, #F26B1D 100%);
  color: #fff;
  box-shadow:
    0 1px 0 rgba(255,255,255,0.35) inset,
    0 10px 24px -8px rgba(242,107,29,0.5);
}
.btn-quiet {
  background: rgba(255,255,255,0.7);
  color: var(--c-text);
  border: 0.5px solid var(--c-divider);
}
.btn-full { width: 100%; }

/* ============================================================
   Page transitions (iOS slide)
   ============================================================ */
.page {
  position: absolute;
  inset: 0;
  background: transparent;
  display: flex;
  flex-direction: column;
}
.page-enter { transform: translateX(100%); }
.page-enter-active {
  transform: translateX(0);
  transition: transform 360ms cubic-bezier(0.32, 0.72, 0.16, 1);
}
.page-exit { transform: translateX(0); }
.page-exit-active {
  transform: translateX(-30%);
  opacity: 0.6;
  transition: transform 360ms cubic-bezier(0.32, 0.72, 0.16, 1), opacity 360ms;
}

/* ============================================================
   Logo
   ============================================================ */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 9px;
}
.logo-mark {
  width: 28px; height: 28px;
  flex-shrink: 0;
}
.logo-word {
  font-family: var(--f-en);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--c-text);
  white-space: nowrap;
}
.logo-word .sci {
  color: var(--c-primary-deep);
  font-weight: 500;
}

/* ============================================================
   Greeting block
   ============================================================ */
.greet {
  padding: 8px var(--pad-x) 16px;
}
.greet-eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--f-en);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-text-sub);
  margin-bottom: 8px;
  white-space: nowrap;
}
.greet-eyebrow .dot {
  width: 6px; height: 6px; border-radius: 999px;
  background: var(--c-accent);
  box-shadow: 0 0 0 4px rgba(242,107,29,0.18);
}
.greet-title {
  font-size: 26px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.005em;
  margin: 0 0 4px;
}
.greet-title .name {
  background: linear-gradient(120deg, var(--c-primary-deep) 0%, var(--c-primary) 60%, var(--c-accent) 130%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.greet-sub {
  color: var(--c-text-sub);
  font-size: 14px;
  line-height: 1.5;
}

/* ============================================================
   Home: A — tile grid
   ============================================================ */
.tiles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 4px var(--pad-x) 24px;
}
.tile {
  position: relative;
  aspect-ratio: 1 / 1.08;
  padding: 16px;
  border-radius: var(--card-r);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  background: var(--c-surface-glass);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  backdrop-filter: blur(18px) saturate(140%);
  border: 0.5px solid rgba(255,255,255,0.7);
  box-shadow: var(--sh-card);
  overflow: hidden;
}
.tile:active { transform: scale(0.98); }
.tile-icon {
  width: 28px; height: 28px;
  color: var(--c-primary-deep);
  display: flex; align-items: center; justify-content: center;
}
.tile-icon.accent { color: var(--c-accent); }
.tile-meta {
  font-family: var(--f-en);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-text-mute);
}
.tile-title {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: 0.005em;
  color: var(--c-text);
}
.tile-foot {
  font-size: 12px;
  color: var(--c-text-sub);
  display: flex;
  align-items: center;
  gap: 6px;
}
.tile.featured {
  grid-column: 1 / -1;
  aspect-ratio: auto;
  background: linear-gradient(120deg, rgba(122,155,118,0.95) 0%, rgba(95,129,89,0.94) 100%);
  color: #fff;
}
.tile.featured .tile-icon,
.tile.featured .tile-meta,
.tile.featured .tile-title,
.tile.featured .tile-foot {
  color: #fff;
}
.tile.featured .tile-meta { color: rgba(255,255,255,0.7); }
.tile.featured .tile-foot { color: rgba(255,255,255,0.75); }
.tile-corner-dot {
  position: absolute;
  top: 14px; right: 14px;
  width: 8px; height: 8px;
  border-radius: 999px;
  background: var(--c-accent);
  box-shadow: 0 0 0 4px rgba(242,107,29,0.2);
}

/* ============================================================
   Home: B — sectioned list (Reminders-like)
   ============================================================ */
.b-hero {
  margin: 0 var(--pad-x) 18px;
  padding: 18px;
  border-radius: var(--card-r);
  background: linear-gradient(140deg, #88a983 0%, #5F8159 100%);
  color: #fff;
  box-shadow: var(--sh-card);
  position: relative;
  overflow: hidden;
}
.b-hero::after {
  content: "";
  position: absolute;
  inset: auto -40px -40px auto;
  width: 180px; height: 180px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(247,197,159,0.4) 0%, rgba(247,197,159,0) 70%);
  pointer-events: none;
}
.b-hero-label {
  font-family: var(--f-en);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.78;
}
.b-hero-title {
  margin-top: 10px;
  font-size: 22px;
  font-weight: 600;
  line-height: 1.3;
}
.b-hero-meta {
  margin-top: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  opacity: 0.9;
  position: relative;
  z-index: 1;
  flex-wrap: wrap;
}
.b-hero-meta .pill {
  background: rgba(255,255,255,0.18);
  border-radius: 999px;
  padding: 4px 10px;
  font-family: var(--f-en);
  font-weight: 500;
  white-space: nowrap;
}

/* ============================================================
   Home: C — today-first
   ============================================================ */
.c-today {
  margin: 0 var(--pad-x) 20px;
  padding: 0;
  border-radius: 26px;
  background: var(--c-surface);
  box-shadow: var(--sh-card);
  overflow: hidden;
  border: 0.5px solid rgba(255,255,255,0.7);
}
.c-today-top {
  padding: 18px 20px 16px;
  background: linear-gradient(135deg, rgba(207,225,201,0.6) 0%, rgba(247,197,159,0.35) 100%);
  position: relative;
}
.c-today-eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--f-en);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-primary-deep);
  white-space: nowrap;
}
.c-today-eyebrow .pulse {
  width: 7px; height: 7px; border-radius: 999px;
  background: var(--c-accent);
  box-shadow: 0 0 0 4px rgba(242,107,29,0.18);
}
.c-today-title {
  margin-top: 10px;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--c-text);
}
.c-today-date {
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--c-text-sub);
  font-size: 13.5px;
  white-space: nowrap;
}
.c-today-date .big {
  font-family: var(--f-en);
  font-weight: 600;
  font-size: 15px;
  color: var(--c-text);
}
.c-today-body {
  padding: 14px 20px 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-top: 0.5px solid var(--c-divider);
}
.c-quick {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  padding: 0 var(--pad-x) 18px;
}
.c-quick-tile {
  background: var(--c-surface-glass);
  border-radius: 18px;
  border: 0.5px solid rgba(255,255,255,0.7);
  padding: 14px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  text-align: center;
  box-shadow: var(--sh-card);
}
.c-quick-tile .ico {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 10px;
  background: var(--c-primary-soft);
  color: var(--c-primary-deep);
}
.c-quick-tile .lbl {
  font-size: 11.5px;
  font-weight: 500;
  color: var(--c-text);
  line-height: 1.25;
}
.c-feed-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 4px var(--pad-x) 10px;
}
.c-feed-head .ttl {
  font-size: 16px;
  font-weight: 600;
}
.c-feed-head .all {
  font-family: var(--f-en);
  font-size: 12.5px;
  color: var(--c-primary-deep);
  font-weight: 500;
}
.c-feed {
  display: flex;
  gap: 12px;
  padding: 0 var(--pad-x) 20px;
  overflow-x: auto;
  scrollbar-width: none;
}
.c-feed::-webkit-scrollbar { display: none; }
.c-feed-card {
  flex: 0 0 220px;
  background: var(--c-surface);
  border-radius: 18px;
  box-shadow: var(--sh-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  cursor: pointer;
}
.c-feed-thumb {
  height: 110px;
  background:
    repeating-linear-gradient(135deg, rgba(122,155,118,0.18) 0 10px, rgba(122,155,118,0.06) 10px 20px),
    linear-gradient(135deg, var(--c-primary-soft) 0%, var(--c-accent-soft) 120%);
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: 10px;
}
.c-feed-thumb.var2 {
  background:
    repeating-linear-gradient(45deg, rgba(242,107,29,0.12) 0 10px, rgba(242,107,29,0.04) 10px 20px),
    linear-gradient(135deg, var(--c-accent-soft) 0%, var(--c-primary-soft) 130%);
}
.c-feed-thumb.var3 {
  background:
    repeating-linear-gradient(90deg, rgba(45,58,42,0.08) 0 10px, rgba(45,58,42,0.02) 10px 20px),
    linear-gradient(135deg, #E8E5DE 0%, var(--c-primary-soft) 130%);
}
.c-feed-thumb .kind {
  font-family: var(--f-en);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-primary-deep);
  background: rgba(255,255,255,0.85);
  padding: 3px 8px;
  border-radius: 999px;
}
.c-feed-body {
  padding: 12px 14px 14px;
}
.c-feed-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--c-text);
}
.c-feed-date {
  margin-top: 6px;
  font-family: var(--f-en);
  font-size: 11.5px;
  color: var(--c-text-mute);
}

/* ============================================================
   Detail screens
   ============================================================ */
.detail-hero {
  padding: 0 var(--pad-x) 16px;
}
.detail-eyebrow {
  display: flex;
  gap: 10px;
  align-items: center;
  font-family: var(--f-en);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--c-primary-deep);
  margin-bottom: 10px;
}
.detail-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.005em;
  margin: 0;
}
.detail-meta {
  margin-top: 12px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--c-text-sub);
  font-size: 13px;
  align-items: center;
}
.detail-section {
  padding: 14px var(--pad-x);
}
.detail-section-label {
  font-family: var(--f-en);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-text-sub);
  margin-bottom: 8px;
}
.detail-text {
  font-size: 15px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--c-text);
}
.detail-card {
  background: var(--c-surface-glass);
  border-radius: 18px;
  padding: 16px;
  border: 0.5px solid rgba(255,255,255,0.7);
  box-shadow: var(--sh-card);
}
.detail-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  background: var(--c-surface-glass);
  border-radius: 14px;
  border: 0.5px solid var(--c-divider);
  cursor: pointer;
  margin-bottom: 8px;
}
.detail-link:hover { background: var(--c-surface-glass-strong); }
.detail-link .ic {
  width: 36px; height: 36px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: var(--c-primary-soft);
  color: var(--c-primary-deep);
  flex-shrink: 0;
}
.detail-link .ic.acc { background: var(--c-accent-soft); color: #B14A0C; }
.detail-link .tx { flex: 1; min-width: 0; }
.detail-link .t1 { font-size: 14px; font-weight: 500; }
.detail-link .t2 { font-size: 12px; color: var(--c-text-sub); margin-top: 2px; }
.detail-link .ar {
  color: var(--c-text-mute);
  font-family: var(--f-en);
  font-size: 12px;
}

/* Problem detail: answer disclosure */
.answer-box {
  margin-top: 12px;
  border-radius: 18px;
  border: 0.5px solid var(--c-divider);
  background: var(--c-surface-glass);
  overflow: hidden;
}
.answer-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: var(--f-jp);
  font-size: 15px;
  font-weight: 500;
  color: var(--c-text);
}
.answer-toggle .chev-icon {
  margin-left: auto;
  transition: transform 0.25s;
  color: var(--c-text-mute);
}
.answer-toggle.open .chev-icon { transform: rotate(90deg); }
.answer-content {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.28s ease;
}
.answer-content.open { grid-template-rows: 1fr; }
.answer-content > div {
  overflow: hidden;
  padding: 0 16px;
}
.answer-content.open > div {
  padding: 0 16px 16px;
}
.answer-body {
  border-top: 0.5px solid var(--c-divider);
  padding-top: 14px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-text);
}
.answer-body .key {
  display: inline-block;
  background: var(--c-primary-soft);
  color: var(--c-primary-deep);
  padding: 1px 8px;
  border-radius: 6px;
  font-family: var(--f-en);
  font-weight: 600;
  margin-right: 4px;
}

/* Article cards (list) */
.art-card {
  display: flex;
  gap: 14px;
  padding: 14px var(--pad-x);
  cursor: pointer;
  position: relative;
}
.art-card + .art-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: var(--pad-x);
  right: var(--pad-x);
  height: 0.5px;
  background: var(--c-divider);
}
.art-thumb {
  width: 88px; height: 88px;
  border-radius: 14px;
  flex-shrink: 0;
  background:
    repeating-linear-gradient(135deg, rgba(122,155,118,0.18) 0 8px, rgba(122,155,118,0.06) 8px 16px),
    linear-gradient(135deg, var(--c-primary-soft) 0%, var(--c-accent-soft) 130%);
  position: relative;
  overflow: hidden;
}
.art-thumb.v2 {
  background:
    repeating-linear-gradient(45deg, rgba(242,107,29,0.12) 0 8px, rgba(242,107,29,0.04) 8px 16px),
    linear-gradient(135deg, var(--c-accent-soft) 0%, var(--c-primary-soft) 130%);
}
.art-thumb.v3 {
  background:
    repeating-linear-gradient(90deg, rgba(45,58,42,0.08) 0 8px, rgba(45,58,42,0.02) 8px 16px),
    linear-gradient(135deg, #E8E5DE 0%, var(--c-primary-soft) 130%);
}
.art-thumb.v4 {
  background:
    repeating-linear-gradient(60deg, rgba(122,155,118,0.22) 0 8px, rgba(247,197,159,0.18) 8px 16px),
    linear-gradient(135deg, var(--c-primary-soft) 0%, var(--c-accent-soft) 130%);
}
.art-body { flex: 1; min-width: 0; padding-top: 2px; }
.art-tag {
  display: inline-block;
  font-family: var(--f-en);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-primary-deep);
  margin-bottom: 6px;
}
.art-title {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-text);
  -webkit-line-clamp: 2;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.art-sum {
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--c-text-sub);
  line-height: 1.5;
  -webkit-line-clamp: 2;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.art-date {
  margin-top: 8px;
  font-family: var(--f-en);
  font-size: 11.5px;
  color: var(--c-text-mute);
}

/* ============================================================
   Spinner + Modal
   ============================================================ */
.spinner-wrap {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(249,247,242,0.85);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  z-index: 100;
  flex-direction: column;
  gap: 10px;
  color: var(--c-text-sub);
  font-size: 13px;
  letter-spacing: 0.04em;
}
.spinner {
  width: 28px; height: 28px;
  border-radius: 999px;
  border: 2.5px solid var(--c-primary-soft);
  border-top-color: var(--c-primary);
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.modal-back {
  position: absolute;
  inset: 0;
  background: rgba(45,58,42,0.35);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 28px;
  animation: fadeIn 0.2s;
}
@keyframes fadeIn { from { opacity: 0; } }
.modal-card {
  background: var(--c-surface);
  border-radius: 22px;
  padding: 24px 22px 20px;
  width: 100%;
  max-width: 320px;
  box-shadow: var(--sh-pop);
  animation: popIn 0.25s cubic-bezier(0.32, 0.72, 0.16, 1);
}
@keyframes popIn { from { transform: scale(0.92); opacity: 0; } }
.modal-icon {
  width: 44px; height: 44px;
  border-radius: 14px;
  background: var(--c-accent-soft);
  color: #B14A0C;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 12px;
}
.modal-title {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.01em;
  margin-bottom: 6px;
}
.modal-body {
  color: var(--c-text-sub);
  font-size: 13.5px;
  line-height: 1.6;
  margin-bottom: 16px;
}
.modal-foot {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}
.modal-foot .btn { padding: 10px 14px; font-size: 13.5px; }

/* ============================================================
   Misc
   ============================================================ */
.empty-pad-bottom { height: 24px; }
.divider {
  height: 0.5px;
  background: var(--c-divider);
  margin: 8px var(--pad-x);
}

.search-box {
  margin: 4px var(--pad-x) 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  background: var(--c-surface-glass);
  border-radius: 14px;
  border: 0.5px solid rgba(255,255,255,0.7);
  color: var(--c-text-mute);
  font-size: 14px;
}

/* functional search bar */
.search-box.live {
  transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}
.search-box.live:focus-within {
  background: var(--c-surface);
  border-color: var(--c-primary-soft);
  box-shadow: 0 0 0 3px rgba(122,155,118,0.16);
  color: var(--c-primary-deep);
}
.search-box.live.filled { color: var(--c-text-sub); }

.search-input {
  flex: 1;
  min-width: 0;
  border: none;
  outline: none;
  background: transparent;
  font: inherit;
  font-size: 14px;
  color: var(--c-text);
  padding: 0;
}
.search-input::placeholder { color: var(--c-text-mute); }

.search-clear {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border: none;
  border-radius: 999px;
  background: var(--c-bg-warm);
  color: var(--c-text-sub);
  cursor: pointer;
  transition: background 140ms ease, color 140ms ease, transform 120ms ease;
}
.search-clear:active { transform: scale(0.9); }

.search-meta {
  margin: -6px var(--pad-x) 14px;
  font-size: 12.5px;
  color: var(--c-text-sub);
}

.search-empty {
  margin: 8px var(--pad-x);
  padding: 32px 20px;
  background: var(--c-surface-glass);
  border: 0.5px solid rgba(255,255,255,0.7);
  border-radius: var(--card-r);
  text-align: center;
  color: var(--c-text-sub);
}
.search-empty-ic {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 999px;
  background: var(--c-bg-warm);
  color: var(--c-text-mute);
  margin-bottom: 12px;
}
.search-empty-t1 { font-size: 15px; font-weight: 600; color: var(--c-text); }
.search-empty-t2 { font-size: 13px; margin-top: 4px; }

/* ── Attendance QR ────────────────────────────────────── */
/* Home CTA button */
.qr-cta {
  margin: 14px var(--pad-x) 4px;
  width: calc(100% - var(--pad-x) * 2);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border: none;
  border-radius: 18px;
  cursor: pointer;
  text-align: left;
  font: inherit;
  color: #fff;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-deep) 100%);
  box-shadow: var(--sh-cta);
  transition: transform 120ms ease;
}
.qr-cta:active { transform: scale(0.985); }
.qr-cta-ic {
  flex: none;
  width: 42px; height: 42px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.18);
  color: #fff;
}
.qr-cta-tx { flex: 1; min-width: 0; }
.qr-cta-tx .t1 { font-size: 16px; font-weight: 600; letter-spacing: 0.01em; }
.qr-cta-tx .t2 { font-size: 12.5px; color: rgba(255,255,255,0.85); margin-top: 2px; }
.qr-cta-ar { flex: none; color: rgba(255,255,255,0.8); display: flex; }

/* identity strip */
.qr-id {
  margin: 4px var(--pad-x) 14px;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--c-surface-glass);
  border: 0.5px solid rgba(255,255,255,0.7);
  border-radius: 18px;
}
.qr-id-av {
  flex: none;
  width: 52px; height: 52px;
  border-radius: 999px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-deep) 100%);
  box-shadow: 0 4px 12px -6px rgba(95,129,89,0.6);
}
.qr-id-tx .t1 { font-size: 12.5px; color: var(--c-text-sub); }
.qr-id-tx .t2 { font-size: 18px; font-weight: 600; color: var(--c-text); margin-top: 1px; display: flex; align-items: baseline; gap: 8px; }
.qr-id-tx .grade {
  font-size: 11px; font-weight: 500;
  color: var(--c-primary-deep);
  background: var(--c-primary-soft);
  padding: 2px 8px; border-radius: 999px;
}

/* QR card */
.qr-card {
  margin: 0 var(--pad-x) 16px;
  background: var(--c-surface);
  border-radius: var(--card-r);
  border: 0.5px solid rgba(45,58,42,0.05);
  box-shadow: var(--sh-card);
  padding: 22px 20px 18px;
}
.qr-frame {
  background: #fff;
  border-radius: 18px;
  padding: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 0.5px solid var(--c-divider);
}
.qr-frame svg { display: block; width: 100%; height: auto; max-width: 252px; border-radius: 4px; }
.qr-note {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 0.5px solid var(--c-divider);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--c-text-sub);
  text-wrap: pretty;
}
.qr-note .ic { flex: none; color: var(--c-text-mute); display: flex; }

/* refresh button */
.qr-refresh {
  margin: 0 var(--pad-x);
  width: calc(100% - var(--pad-x) * 2);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px;
  border: 0.5px solid var(--c-divider);
  border-radius: 16px;
  background: var(--c-surface);
  color: var(--c-text);
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(45,58,42,0.05);
  transition: transform 120ms ease, background 140ms ease;
}
.qr-refresh:active { transform: scale(0.985); background: var(--c-bg-warm); }
.qr-refresh svg { color: var(--c-primary-deep); }

/* gentle entry fade for content rows on mount */
.fade-up { /* disabled — caused opacity-0 freeze in some hosts */ }