/* CardAI WP – Premium UI Overhaul */
/* Import Inter from Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ─── Design Tokens ──────────────────────────────────────────────────────── */
:root {
  /* Backgrounds */
  --bg0:   #0b0d0f;
  --bg1:   #0f1214;
  --bg2:   #131719;
  --panel: #161b1d;
  --panel2:#1b2022;

  /* Borders */
  --border:  rgba(255,255,255,.08);
  --border2: rgba(255,255,255,.13);
  --border3: rgba(255,255,255,.18);

  /* Text */
  --text:   #eef1f4;
  --muted:  rgba(238,241,244,.60);
  --muted2: rgba(238,241,244,.40);

  /* Accent – warm lavender */
  --primary:   #b8a8ff;
  --primary2:  #9180f4;
  --primary-bg: rgba(184,168,255,.12);
  --primary-border: rgba(184,168,255,.35);

  /* Semantic */
  --green:  #4ade80;
  --green-bg: rgba(74,222,128,.10);
  --green-border: rgba(74,222,128,.30);
  --red:    #f87171;
  --red-bg: rgba(248,113,113,.10);
  --red-border: rgba(248,113,113,.30);
  --amber:  #fbbf24;
  --amber-bg: rgba(251,191,36,.10);
  --amber-border: rgba(251,191,36,.30);
  --blue:   #60a5fa;
  --blue-bg: rgba(96,165,250,.10);
  --blue-border: rgba(96,165,250,.30);

  /* Shadows */
  --shadow-sm: 0 4px 16px rgba(0,0,0,.30);
  --shadow:    0 12px 40px rgba(0,0,0,.45);
  --shadow-lg: 0 24px 64px rgba(0,0,0,.60);

  /* Geometry */
  --r-sm: 10px;
  --r:    14px;
  --r-lg: 18px;
  --r-xl: 22px;

  /* Spacing */
  --pad: 20px;

  /* Typography */
  --font: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;

  /* Transitions */
  --ease: cubic-bezier(.22,.68,0,1.2);
  --ease-out: cubic-bezier(.16,1,.3,1);
}

/* ─── Keyframes ──────────────────────────────────────────────────────────── */
@keyframes fadeIn  { from{opacity:0} to{opacity:1} }
@keyframes slideUp { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:translateY(0)} }
@keyframes pulse   { 0%,100%{opacity:.6} 50%{opacity:1} }
@keyframes shimmer { 0%{background-position:-400px 0} 100%{background-position:400px 0} }
@keyframes scaleIn { from{opacity:0;transform:scale(.96)} to{opacity:1;transform:scale(1)} }
@keyframes correctPulse { 0%{box-shadow:0 0 0 0 rgba(74,222,128,.4)}
  70%{box-shadow:0 0 0 8px rgba(74,222,128,0)} 100%{box-shadow:0 0 0 0 rgba(74,222,128,0)} }
@keyframes wrongShake { 0%,100%{transform:translateX(0)} 20%,60%{transform:translateX(-5px)} 40%,80%{transform:translateX(5px)} }
@keyframes toastSlide { from{opacity:0;transform:translateY(12px)} to{opacity:1;transform:translateY(0)} }
@keyframes progressGlow { 0%,100%{opacity:.8} 50%{opacity:1} }

/* ─── Base ───────────────────────────────────────────────────────────────── */
#cardai-app, .c-login {
  font-family: var(--font);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
}
#cardai-app *, #cardai-app *::before, #cardai-app *::after { box-sizing: inherit; }

/* ─── Login ──────────────────────────────────────────────────────────────── */
.c-login {
  min-height: 70vh;
  display: flex; align-items: center; justify-content: center;
  background:
    radial-gradient(900px 500px at 15% 0%,  rgba(184,168,255,.10), transparent 55%),
    radial-gradient(700px 400px at 85% 100%, rgba(96,165,250,.07), transparent 55%),
    linear-gradient(160deg, var(--bg0), var(--bg1));
  border-radius: var(--r-xl);
}
.c-login-card {
  width: min(440px, 92vw);
  background: linear-gradient(160deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  border: 1px solid var(--border2);
  border-radius: var(--r-xl);
  padding: 36px;
  box-shadow: var(--shadow-lg);
  display: flex; flex-direction: column; gap: 20px;
  animation: scaleIn .3s var(--ease-out) both;
}

/* ─── Brand ──────────────────────────────────────────────────────────────── */
.c-brand {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -.6px;
  display: flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, #eef1f4 30%, var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.c-brand-dot { color: var(--primary); -webkit-text-fill-color: var(--primary); font-size: 22px; }

/* ─── Shell (App wrapper) ────────────────────────────────────────────────── */
.c-shell {
  min-height: 70vh;
  display: flex;
  background: linear-gradient(160deg, var(--bg0) 0%, var(--bg1) 100%);
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.05);
  box-shadow: var(--shadow-lg);
}

/* ─── Sidebar ────────────────────────────────────────────────────────────── */
.c-sidebar {
  width: 270px;
  flex: 0 0 270px;
  background: linear-gradient(180deg, rgba(255,255,255,.025), rgba(255,255,255,.010));
  border-right: 1px solid var(--border);
  padding: 22px 14px;
  display: flex; flex-direction: column;
}
.c-side-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted2);
  padding: 0 10px;
  margin-bottom: 10px;
}
.c-side-item {
  width: 100%;
  display: flex; align-items: center; gap: 10px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  padding: 10px 12px;
  border-radius: var(--r-sm);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font);
  transition: background .15s, border-color .15s, color .15s;
}
.c-side-item:hover { background: rgba(255,255,255,.035); border-color: var(--border); color: var(--text); }
.c-side-item.is-active {
  background: var(--primary-bg);
  border-color: var(--primary-border);
  color: var(--primary);
}
.c-ico { width: 18px; text-align: center; flex-shrink: 0; }
.c-side-search {
  padding: 9px 12px;
  gap: 8px;
  background: rgba(0,0,0,.15);
  border: 1px solid var(--border);
  margin-top: 4px;
  cursor: text;
}
.c-side-search input {
  width: 100%;
  background: transparent;
  border: 0;
  outline: 0;
  color: var(--text);
  font-family: var(--font);
  font-size: 13px;
}
.c-side-search input::placeholder { color: var(--muted2); }
.c-side-sep { flex: 1; min-height: 16px; }
.c-side-footer { display: flex; flex-direction: column; gap: 10px; padding-top: 16px; border-top: 1px solid var(--border); }
.c-user {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: rgba(0,0,0,.12);
}
.c-user-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--primary-bg);
  border: 1px solid var(--primary-border);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; color: var(--primary);
  flex-shrink: 0;
}
.c-user-info { flex: 1; min-width: 0; }
.c-user-name { font-weight: 600; font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.c-user-badge {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 999px;
  border: 1px solid var(--border2);
  color: var(--muted2);
  display: inline-block;
  margin-top: 2px;
}

/* ─── Main area ──────────────────────────────────────────────────────────── */
.c-main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.c-main-full { flex: 1; display: flex; flex-direction: column; width: 100%; min-width: 0; }
.c-content { padding: 24px 28px 36px; }
.c-page-title { font-size: 26px; font-weight: 700; margin: 10px 0 20px; letter-spacing: -.3px; }
.c-meta { color: var(--muted); font-size: 12px; line-height: 1.5; }

/* ─── Topbar ─────────────────────────────────────────────────────────────── */
.c-topbar {
  padding: 16px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(0,0,0,.08);
  flex-shrink: 0;
}
.c-topbar-right { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.c-statbox {
  display: flex; align-items: center; gap: 4px;
  padding: 0;
}
.c-stat {
  padding: 7px 12px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: rgba(0,0,0,.12);
  display: flex; flex-direction: column; gap: 2px;
}
.c-stat-k { font-size: 10px; font-weight: 600; letter-spacing: .05em; text-transform: uppercase; color: var(--muted2); }
.c-stat-v { font-size: 13px; font-weight: 600; color: var(--text); }

/* ─── Deck Grid ──────────────────────────────────────────────────────────── */
.c-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 1100px) { .c-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 760px)  {
  .c-sidebar { display: none; }
  .c-grid { grid-template-columns: 1fr; }
  .c-topbar { flex-direction: column; align-items: flex-start; gap: 10px; }
}

/* ─── Deck Card ──────────────────────────────────────────────────────────── */
.c-deck {
  position: relative;
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  cursor: pointer;
  overflow: hidden;
  transition: border-color .18s, transform .18s var(--ease), box-shadow .18s;
  animation: slideUp .28s var(--ease-out) both;
}
.c-deck:hover {
  border-color: var(--border2);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.c-deck-top {
  height: 80px;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 14px;
  position: relative;
  overflow: hidden;
}
.c-deck-top::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0), rgba(0,0,0,.25));
  pointer-events: none;
}
.c-deck-check {
  width: 20px; height: 20px;
  border-radius: 6px;
  border: 2px solid rgba(255,255,255,.35);
  background: rgba(255,255,255,.15);
  flex-shrink: 0;
}
.c-deck-dots { opacity: .65; font-size: 18px; color: rgba(255,255,255,.8); position: relative; z-index: 1; }
.c-deck-body { padding: 14px 16px 16px; }
.c-deck-title { font-weight: 700; font-size: 16px; letter-spacing: -.2px; margin-bottom: 8px; }
.c-deck-meta {
  color: var(--muted); font-size: 12px;
  display: flex; flex-direction: column; gap: 3px;
}
.c-deck-meta-row { display: flex; align-items: center; gap: 6px; }
.c-deck-meta-ico { opacity: .6; font-size: 11px; }
.c-deck-del {
  position: absolute;
  right: 10px; top: 58px;
  width: 30px; height: 30px;
  border-radius: var(--r-sm);
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(10,12,16,.55);
  color: rgba(238,241,244,.75);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px;
  opacity: 0;
  transition: opacity .15s, border-color .15s, background .15s;
  z-index: 2;
  backdrop-filter: blur(4px);
}
.c-deck:hover .c-deck-del { opacity: 1; }
.c-deck-del:hover { border-color: var(--red-border); background: var(--red-bg); color: var(--red); }

/* ─── Buttons ────────────────────────────────────────────────────────────── */
.c-btn {
  appearance: none;
  border: 1px solid var(--border2);
  background: rgba(255,255,255,.04);
  color: var(--text);
  padding: 9px 16px;
  border-radius: var(--r-sm);
  cursor: pointer;
  font-weight: 600;
  font-size: 13px;
  font-family: var(--font);
  display: inline-flex; align-items: center; gap: 7px;
  transition: background .14s, border-color .14s, filter .14s;
  white-space: nowrap;
}
.c-btn:hover { background: rgba(255,255,255,.07); border-color: var(--border3); }
.c-btn:active { transform: scale(.98); }
.c-btn-ghost { background: transparent; border-color: var(--border); }
.c-btn-ghost:hover { background: rgba(255,255,255,.04); }

.c-btn-primary {
  background: linear-gradient(160deg, var(--primary) 0%, var(--primary2) 100%);
  border-color: rgba(0,0,0,.20);
  color: #0d0f12;
  font-weight: 700;
  box-shadow: 0 2px 12px rgba(145,128,244,.30);
}
.c-btn-primary:hover { filter: brightness(1.04); box-shadow: 0 4px 20px rgba(145,128,244,.40); }

.c-btn-premium {
  background: linear-gradient(160deg, #9b8cff, #7b6bff);
  border-color: rgba(0,0,0,.20);
  color: #0d0f12;
  font-weight: 700;
  justify-content: center;
  box-shadow: 0 2px 10px rgba(123,107,255,.30);
}

.c-btn-danger { border-color: var(--red-border); background: var(--red-bg); color: var(--red); }
.c-btn-danger:hover { background: rgba(248,113,113,.14); }

.is-disabled { opacity: .5; cursor: not-allowed; pointer-events: none; }

/* ─── Pills ──────────────────────────────────────────────────────────────── */
.c-pill {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border2);
  background: rgba(0,0,0,.18);
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  cursor: default;
}
.c-pill-danger { border-color: var(--red-border); color: var(--red); background: var(--red-bg); }
/* Range pills (clickable) */
.c-range .c-pill {
  cursor: pointer;
  font-size: 12px;
  padding: 6px 12px;
  transition: background .14s, border-color .14s, color .14s;
}
.c-range .c-pill:hover { background: rgba(255,255,255,.06); border-color: var(--border3); color: var(--text); }
.c-pill.is-on { border-color: var(--primary-border); background: var(--primary-bg); color: var(--primary); }

/* ─── Empty state ────────────────────────────────────────────────────────── */
.c-empty {
  padding: 60px 24px;
  border: 1px dashed rgba(255,255,255,.10);
  border-radius: var(--r-xl);
  background: rgba(255,255,255,.01);
  text-align: center;
  color: var(--muted);
  animation: fadeIn .3s ease both;
}
.c-empty-icon { font-size: 40px; margin-bottom: 16px; opacity: .4; }
.c-empty-title { font-size: 18px; font-weight: 600; color: var(--text); margin-bottom: 8px; }

/* ─── Modal ──────────────────────────────────────────────────────────────── */
.c-modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  z-index: 99999;
  padding: 16px;
  animation: fadeIn .18s ease both;
}
.c-modal {
  width: min(800px, 96vw);
  max-height: 90vh;
  display: flex; flex-direction: column;
  border-radius: var(--r-xl);
  border: 1px solid var(--border2);
  background: linear-gradient(160deg, #161a1c 0%, #111518 100%);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: scaleIn .22s var(--ease-out) both;
}
.c-modal-h {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.c-modal-title { font-weight: 700; font-size: 17px; letter-spacing: -.2px; }
.c-modal-b { padding: 20px; overflow-y: auto; flex: 1; }
.c-modal-f { padding: 14px 20px; border-top: 1px solid var(--border); flex-shrink: 0; }
.c-row { display: flex; gap: 10px; align-items: center; justify-content: flex-end; margin-top: 16px; }
.c-spacer { flex: 1; }

/* ─── Form fields ────────────────────────────────────────────────────────── */
.c-field { margin-bottom: 14px; }
.c-field label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: .04em;
  text-transform: uppercase;
}
.c-field input, .c-field textarea, .c-field select {
  width: 100%;
  background: rgba(255,255,255,.03);
  border: 1px solid var(--border2);
  border-radius: var(--r-sm);
  color: var(--text);
  padding: 11px 14px;
  font-size: 14px;
  font-family: var(--font);
  outline: none;
  transition: border-color .14s, box-shadow .14s;
}
.c-field input::placeholder, .c-field textarea::placeholder { color: var(--muted2); }
.c-field input:focus, .c-field textarea:focus, .c-field select:focus {
  border-color: var(--primary-border);
  box-shadow: 0 0 0 3px rgba(184,168,255,.10);
}
.c-field textarea { resize: vertical; min-height: 90px; line-height: 1.6; }
.c-field select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23b8a8ff' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px; }

.c-select {
  background: rgba(0,0,0,.30);
  border: 1px solid var(--border2);
  color: var(--text);
  border-radius: var(--r-sm);
  padding: 10px 14px;
  outline: none;
  font-family: var(--font);
  font-size: 13px;
  min-width: 200px;
  transition: border-color .14s, box-shadow .14s;
}
.c-select:focus { border-color: var(--primary-border); box-shadow: 0 0 0 3px rgba(184,168,255,.10); }

.c-num {
  width: 100px;
  background: rgba(0,0,0,.30);
  border: 1px solid var(--border2);
  color: var(--text);
  border-radius: var(--r-sm);
  padding: 10px 12px;
  outline: none;
  font-family: var(--font);
  font-size: 13px;
  text-align: center;
  transition: border-color .14s, box-shadow .14s;
}
.c-num:focus { border-color: var(--primary-border); box-shadow: 0 0 0 3px rgba(184,168,255,.10); }

.c-limitbar { margin: 8px 0 12px; display: flex; gap: 6px; flex-wrap: wrap; }

/* ─── Deck creation choice cards ─────────────────────────────────────────── */
.c-choice-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 12px; }
@media (max-width: 820px) { .c-choice-grid { grid-template-columns: 1fr; } }
.c-choice {
  text-align: left;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.025);
  border-radius: var(--r-lg);
  padding: 18px;
  cursor: pointer;
  font-family: var(--font);
  transition: border-color .16s, background .16s, transform .16s var(--ease);
  display: flex; flex-direction: column; gap: 6px;
}
.c-choice:hover { border-color: var(--primary-border); background: var(--primary-bg); transform: translateY(-2px); }
.c-choice-icon { font-size: 26px; margin-bottom: 2px; }
.c-choice-t { font-weight: 700; font-size: 15px; color: var(--text); }

/* ─── Deck Page ──────────────────────────────────────────────────────────── */
.c-deck-header {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 16px;
  padding: 20px 24px 0;
  flex-wrap: wrap;
}
.c-deck-h1 {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -.5px;
  color: var(--text);
  line-height: 1.2;
}
.c-deck-actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; flex-shrink: 0; }

/* ─── Tabs ───────────────────────────────────────────────────────────────── */
.c-tabs { display: flex; gap: 4px; margin-top: 14px; }
.c-tab {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 14px;
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  transition: background .14s, border-color .14s, color .14s;
}
.c-tab:hover { background: rgba(255,255,255,.04); border-color: var(--border); color: var(--text); }
.c-tab.is-active { background: rgba(255,255,255,.06); border-color: var(--border2); color: var(--text); }
.c-tab-ico { font-size: 14px; opacity: .8; }

/* ─── Card List (Deck Editor) ────────────────────────────────────────────── */
.c-cardlist { display: flex; flex-direction: column; gap: 0; padding: 16px 24px 100px; }
.c-cardrow {
  position: relative;
  display: flex; gap: 12px; align-items: flex-start;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  transition: background .14s;
}
.c-cardrow:first-child { border-top: 1px solid var(--border); }
.c-cardrow:hover { background: rgba(255,255,255,.015); }
.c-cardrow.is-edit { background: transparent; }
.c-cardrail {
  width: 36px; flex: 0 0 36px;
  display: flex; flex-direction: column; gap: 6px;
  padding-top: 8px;
  align-items: center;
}
.c-railbtn {
  width: 32px; height: 32px;
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted2);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .13s, border-color .13s, color .13s;
}
.c-railbtn:hover { border-color: var(--border2); background: rgba(255,255,255,.05); color: var(--text); }
.c-railbtn-danger:hover { border-color: var(--red-border); background: var(--red-bg); color: var(--red); }
.c-railbtn-handle { cursor: grab; }
.c-railbtn-handle:active { cursor: grabbing; }
.c-ic { display: inline-flex; align-items: center; justify-content: center; }
.c-cardbody { flex: 1; min-width: 0; cursor: pointer; }
.c-cardrow.is-edit .c-cardbody, .c-cardrow.is-editing .c-cardbody { cursor: default; }
.c-q { font-size: 15px; font-weight: 600; margin-top: 4px; color: var(--text); line-height: 1.5; }
.c-a { font-size: 13px; color: var(--muted); margin-top: 4px; line-height: 1.5; }

/* Inline editor */
.c-editwrap {
  border: 1px solid rgba(145,128,244,.35);
  box-shadow: 0 0 0 3px rgba(145,128,244,.08);
  border-radius: var(--r-lg);
  padding: 16px;
  background: rgba(145,128,244,.04);
  animation: scaleIn .16s var(--ease-out) both;
}
.c-edithead {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.c-typepill select, .c-tagwrap input {
  border: 1px solid var(--border2);
  background: rgba(255,255,255,.05);
  color: var(--text);
  border-radius: var(--r-sm);
  padding: 7px 10px;
  font-size: 13px;
  font-family: var(--font);
  outline: none;
}
.c-typepill select:focus, .c-tagwrap input:focus { border-color: var(--primary-border); }
.c-tagwrap input { width: 200px; }
.c-tagwrap input::placeholder { color: var(--muted2); }
.c-editwrap textarea {
  width: 100%;
  border: 1px solid var(--border2);
  background: rgba(0,0,0,.15);
  color: var(--text);
  border-radius: var(--r-sm);
  padding: 10px 12px;
  resize: vertical;
  font-family: var(--font);
  font-size: 14px;
  outline: none;
}
.c-editwrap textarea:focus { border-color: var(--primary-border); box-shadow: 0 0 0 3px rgba(184,168,255,.08); }

/* MCQ editor */
.c-mcq { display: flex; flex-direction: column; gap: 8px; margin-top: 6px; }
.c-mcq-row { display: flex; gap: 8px; align-items: center; }
.c-mcq-in {
  flex: 1;
  padding: 9px 12px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border2);
  background: rgba(0,0,0,.15);
  color: var(--text);
  font-family: var(--font);
  font-size: 13px;
  outline: none;
}
.c-mcq-in:focus { border-color: var(--primary-border); }
.c-mcq-del {
  width: 30px; height: 30px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border2);
  background: rgba(0,0,0,.15);
  color: var(--muted);
  cursor: pointer;
  font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  transition: background .13s, border-color .13s, color .13s;
}
.c-mcq-del:hover { border-color: var(--red-border); background: var(--red-bg); color: var(--red); }
.c-mcq-add {
  padding: 8px 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--primary-border);
  background: var(--primary-bg);
  color: var(--primary);
  cursor: pointer;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  margin-top: 4px;
  transition: background .13s;
}
.c-mcq-add:hover { background: rgba(184,168,255,.18); }

/* ─── Docbar (floating AI bar) ───────────────────────────────────────────── */
.c-docbar {
  position: sticky;
  bottom: 20px;
  display: flex; align-items: center; gap: 10px;
  padding: 8px;
  border-radius: 999px;
  border: 1px solid var(--border2);
  background: rgba(14,17,20,.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
  margin: 16px 24px 0;
}
.c-docbar-plus {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border2);
  background: rgba(255,255,255,.05);
  color: var(--text);
  font-size: 20px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .13s;
  flex-shrink: 0;
}
.c-docbar-plus:hover { background: rgba(255,255,255,.09); }
.c-docbar-input {
  flex: 1;
  height: 40px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: transparent;
  display: flex; align-items: center;
  padding: 0 8px;
  cursor: pointer;
  color: var(--muted2);
  font-size: 13px;
}
.c-docbar-send {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(160deg, var(--primary), var(--primary2));
  color: #0d0f12;
  cursor: pointer;
  font-size: 15px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: filter .13s;
}
.c-docbar-send:hover { filter: brightness(1.06); }

/* ─── Stats page ─────────────────────────────────────────────────────────── */
.c-stats-top { display: flex; justify-content: flex-end; margin: 4px 0 2px; }
.c-range { display: flex; gap: 6px; }
.c-stats-grid {
  display: grid; grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 12px; margin-top: 14px;
}
@media (max-width: 980px) { .c-stats-grid { grid-template-columns: repeat(2, minmax(0,1fr)); } }
.c-statcard {
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  background: rgba(0,0,0,.14);
  padding: 14px 16px;
  transition: border-color .14s;
}
.c-statcard:hover { border-color: var(--border2); }
.c-statval { font-weight: 800; font-size: 28px; letter-spacing: -.03em; margin-top: 4px; }
.c-stats-panels {
  display: grid; grid-template-columns: 1.3fr .7fr;
  gap: 12px; margin-top: 12px;
}
@media (max-width: 980px) { .c-stats-panels { grid-template-columns: 1fr; } }
.c-panel {
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  background: rgba(0,0,0,.12);
  padding: 14px 16px;
}
.c-panel-h { font-weight: 700; font-size: 14px; margin-bottom: 10px; color: var(--text); }
.c-mastery { display: flex; flex-direction: column; gap: 10px; margin-top: 4px; }
.c-mastery-kpi { display: flex; align-items: baseline; gap: 8px; }
.c-mastery-bar { height: 8px; border-radius: 999px; background: rgba(255,255,255,.07); overflow: hidden; }
.c-mastery-fill {
  height: 100%; border-radius: 999px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary2) 100%);
  transition: width .6s var(--ease-out);
}
.c-chart { border: 1px solid var(--border); border-radius: var(--r-lg); padding: 14px; background: rgba(10,12,16,.20); }
.c-spark { width: 100%; height: 160px; color: var(--primary); }
.c-chart-placeholder {
  width: 100%; height: 200px;
  border-radius: var(--r-sm); border: 1px dashed var(--border2);
  display: flex; align-items: center; justify-content: center;
  color: var(--muted2); margin-top: 8px; font-size: 13px;
}
.c-bars { display: flex; flex-direction: column; gap: 10px; padding: 4px 0; }
.c-bar-top { display: flex; justify-content: space-between; gap: 8px; font-size: 12px; color: var(--muted); }
.c-bar-label { max-width: 75%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.c-bar-val { font-weight: 600; color: var(--text); }
.c-bar-track { height: 8px; border-radius: 999px; background: rgba(255,255,255,.06); overflow: hidden; margin-top: 5px; }
.c-bar-fill { height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--primary) 0%, var(--primary2) 100%); }

/* ─── Study Mode ─────────────────────────────────────────────────────────── */
.c-study-topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.c-study-title { font-weight: 700; font-size: 16px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.c-study { display: grid; grid-template-columns: 1fr 300px; min-height: 60vh; gap: 0; }
.c-study-left { padding: 20px 24px 24px; display: flex; flex-direction: column; gap: 16px; overflow: hidden; }

/* Progress */
.c-progress {
  height: 4px; border-radius: 999px;
  background: rgba(255,255,255,.07);
  position: relative; overflow: hidden;
}
.c-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary2));
  border-radius: 999px;
  transition: width .4s var(--ease-out);
  animation: progressGlow 2s ease infinite;
}
.c-progress-label {
  font-size: 11px; font-weight: 600; letter-spacing: .04em;
  text-transform: uppercase; color: var(--muted2);
  margin-top: 6px;
}

/* Write mode toggle */
.c-write-toggle { display: flex; align-items: center; gap: 8px; }
.c-write-toggle-label { font-size: 12px; color: var(--muted); font-weight: 500; }

/* Question card */
.c-question-card {
  border: 1px solid var(--border2);
  background: rgba(255,255,255,.02);
  border-radius: var(--r-xl);
  padding: 28px 28px 22px;
  min-height: 200px;
  display: flex; flex-direction: column;
  position: relative;
  animation: fadeIn .2s ease both;
}
.c-question-label {
  font-size: 10px; font-weight: 700; letter-spacing: .1em;
  text-transform: uppercase; color: var(--muted2); margin-bottom: 12px;
}
.c-question-text {
  font-size: 20px; font-weight: 600; color: var(--text);
  line-height: 1.55; letter-spacing: -.1px;
  flex: 1;
}

/* Reveal button */
.c-reveal {
  margin-top: 20px;
  padding: 14px 20px;
  border: 1px dashed rgba(255,255,255,.14);
  border-radius: var(--r);
  text-align: center;
  color: var(--muted);
  cursor: pointer;
  font-size: 13px; font-weight: 500;
  transition: background .16s, border-color .16s, color .16s;
}
.c-reveal:hover { background: rgba(255,255,255,.04); border-color: rgba(255,255,255,.22); color: var(--text); }

/* Answer area */
.c-answer-area {
  margin-top: 16px;
  padding: 16px 20px;
  border-radius: var(--r);
  border: 1px solid rgba(184,168,255,.20);
  background: rgba(184,168,255,.05);
  animation: fadeIn .22s ease both;
}
.c-answer-label {
  font-size: 10px; font-weight: 700; letter-spacing: .1em;
  text-transform: uppercase; color: var(--primary); margin-bottom: 8px;
}
.c-answer-text { font-size: 16px; color: var(--text); line-height: 1.6; }

/* Write input */
.c-write {
  display: flex; flex-direction: column; gap: 10px;
}
.c-write-input {
  width: 100%;
  background: rgba(255,255,255,.03);
  border: 1px solid var(--border2);
  border-radius: var(--r);
  padding: 13px 16px;
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  outline: none;
  transition: border-color .14s, box-shadow .14s;
}
.c-write-input::placeholder { color: var(--muted2); }
.c-write-input:focus { border-color: var(--primary-border); box-shadow: 0 0 0 3px rgba(184,168,255,.10); }
.c-write-check { align-self: flex-end; }

/* MCQ study options */
.c-mcq-study { display: flex; flex-direction: column; gap: 0; }
.c-mcq-note {
  padding: 10px 14px;
  border-radius: var(--r);
  border: 1px solid var(--green-border);
  background: var(--green-bg);
  color: var(--green);
  font-size: 13px; font-weight: 500;
  margin-bottom: 10px;
}
.c-mcq-study-list { display: flex; flex-direction: column; gap: 8px; }
.c-mcq-opt {
  text-align: left;
  padding: 13px 16px;
  border-radius: var(--r);
  border: 1px solid var(--border2);
  background: rgba(255,255,255,.02);
  color: var(--text);
  cursor: pointer;
  font-family: var(--font);
  font-size: 14px; font-weight: 500;
  transition: background .13s, border-color .13s, transform .10s;
  display: flex; align-items: center; gap: 12px;
}
.c-mcq-opt:hover:not(:disabled) { background: rgba(255,255,255,.05); border-color: var(--border3); transform: translateX(3px); }
.c-mcq-opt:disabled { cursor: default; }
.c-mcq-opt-letter {
  width: 26px; height: 26px; border-radius: 50%;
  border: 1px solid var(--border2);
  background: rgba(255,255,255,.05);
  font-size: 12px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: background .13s, border-color .13s;
}
.c-mcq-opt.is-selected { border-color: var(--primary-border); background: var(--primary-bg); }
.c-mcq-opt.is-selected .c-mcq-opt-letter { background: var(--primary); color: #0d0f12; border-color: transparent; }
.c-mcq-opt.is-correct { border-color: var(--green-border); background: var(--green-bg); animation: correctPulse .5s ease; }
.c-mcq-opt.is-correct .c-mcq-opt-letter { background: var(--green); color: #0a1a10; border-color: transparent; }
.c-mcq-opt.is-wrong { border-color: var(--red-border); background: var(--red-bg); animation: wrongShake .35s ease; }
.c-mcq-opt.is-wrong .c-mcq-opt-letter { background: var(--red); color: #1a0a0a; border-color: transparent; }

/* Grade buttons */
.c-grade-row { display: flex; gap: 8px; flex-wrap: wrap; }
.c-grade-btn {
  flex: 1; min-width: 70px;
  padding: 11px 10px;
  border-radius: var(--r);
  border: 1px solid transparent;
  cursor: pointer;
  font-family: var(--font);
  font-size: 13px; font-weight: 700;
  transition: filter .14s, transform .1s;
  display: flex; flex-direction: column; align-items: center; gap: 3px;
}
.c-grade-btn:hover { filter: brightness(1.10); transform: translateY(-1px); }
.c-grade-btn:active { transform: scale(.97); }
.c-grade-again  { background: var(--red-bg); border-color: var(--red-border); color: var(--red); }
.c-grade-hard   { background: var(--amber-bg); border-color: var(--amber-border); color: var(--amber); }
.c-grade-good   { background: var(--green-bg); border-color: var(--green-border); color: var(--green); }
.c-grade-easy   { background: var(--blue-bg); border-color: var(--blue-border); color: var(--blue); }
.c-grade-sub { font-size: 10px; font-weight: 500; opacity: .7; }

/* ─── Study Queue (Right Panel) ──────────────────────────────────────────── */
.c-queue {
  border-left: 1px solid var(--border);
  background: rgba(0,0,0,.08);
  padding: 16px 12px;
  display: flex; flex-direction: column; gap: 12px;
  overflow: hidden;
}
.c-queue-title {
  font-weight: 700; font-size: 11px; letter-spacing: .08em;
  text-transform: uppercase; color: var(--muted2);
  display: flex; align-items: center; gap: 6px;
}
.c-queue-score {
  text-align: center;
  font-size: 38px; font-weight: 800; letter-spacing: -.03em;
  padding: 4px 0 0;
  line-height: 1;
}
.c-queue-score-label { font-size: 11px; font-weight: 500; color: var(--muted); margin-top: 3px; text-align: center; }
.c-queue-list {
  display: flex; flex-direction: column; gap: 6px;
  max-height: 54vh; overflow-y: auto; padding-right: 2px;
}
.c-queue-list::-webkit-scrollbar { width: 3px; }
.c-queue-list::-webkit-scrollbar-thumb { background: rgba(255,255,255,.12); border-radius: 99px; }
.c-queue-item {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 9px 10px;
  background: rgba(0,0,0,.12);
  transition: border-color .14s;
}
.c-queue-item.is-active { border-color: var(--primary-border); background: var(--primary-bg); }
.c-queue-q { font-size: 12px; color: var(--muted); line-height: 1.4; }
.c-queue-badge {
  font-size: 10px; font-weight: 600; letter-spacing: .04em;
  text-transform: uppercase; color: var(--muted2); margin-bottom: 3px;
  display: block;
}
.c-queue-badge.is-ok { color: var(--green); }
.c-queue-badge.is-bad { color: var(--red); }
.c-queue-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 6px; }
.c-queue-fix {
  border: 1px solid var(--border2);
  background: rgba(255,255,255,.04);
  color: var(--muted);
  border-radius: var(--r-sm);
  padding: 3px 7px;
  cursor: pointer;
  font-size: 11px;
  flex-shrink: 0;
  transition: border-color .13s, color .13s, background .13s;
}
.c-queue-fix:hover { border-color: var(--primary-border); background: var(--primary-bg); color: var(--primary); }

/* ─── Session Report ─────────────────────────────────────────────────────── */
.c-report-cards {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 10px; margin-bottom: 16px;
}
@media (max-width: 900px) { .c-report-cards { grid-template-columns: repeat(2, 1fr); } }
.c-report-card {
  border: 1px solid var(--border);
  background: rgba(255,255,255,.025);
  border-radius: var(--r-lg);
  padding: 16px;
  text-align: center;
  animation: slideUp .25s var(--ease-out) both;
}
.c-report-v { font-weight: 800; font-size: 20px; letter-spacing: -.02em; margin-bottom: 4px; }
.c-report-block {
  border: 1px solid var(--border);
  background: rgba(255,255,255,.02);
  border-radius: var(--r-lg);
  padding: 16px;
  margin-top: 10px;
}
.c-report-h { font-weight: 700; font-size: 16px; margin-bottom: 4px; }

/* ─── Icon buttons ───────────────────────────────────────────────────────── */
.c-iconbtn {
  width: 36px; height: 36px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border2);
  background: rgba(255,255,255,.04);
  color: var(--text);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .13s, border-color .13s;
  flex-shrink: 0;
}
.c-iconbtn:hover { border-color: var(--primary-border); background: var(--primary-bg); }
.c-iconbtn-ico { font-size: 16px; line-height: 1; }

/* ─── Toast ──────────────────────────────────────────────────────────────── */
.c-toast {
  position: fixed;
  bottom: 20px; right: 20px;
  padding: 11px 16px;
  border-radius: var(--r);
  border: 1px solid var(--border2);
  background: rgba(20,24,26,.97);
  color: var(--text);
  font-size: 13px; font-weight: 500;
  z-index: 999999;
  box-shadow: var(--shadow);
  max-width: 360px;
  animation: toastSlide .22s var(--ease-out) both;
  backdrop-filter: blur(8px);
}

/* ─── AI Modal extras ────────────────────────────────────────────────────── */
.c-ai-notes textarea {
  min-height: 180px;
}
.c-mode-group {
  display: flex; gap: 6px; flex-wrap: wrap;
  margin: 8px 0;
}
.c-mode-btn {
  padding: 9px 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border2);
  background: rgba(255,255,255,.03);
  color: var(--muted);
  cursor: pointer;
  font-family: var(--font);
  font-size: 13px; font-weight: 600;
  transition: background .13s, border-color .13s, color .13s;
}
.c-mode-btn:hover { background: rgba(255,255,255,.06); color: var(--text); }
.c-mode-btn.is-active { 
  border-color: var(--primary-border) !important; 
  background: var(--primary-bg); 
  color: var(--primary); 
}
.c-count-wrap { display: flex; align-items: center; gap: 0; }
.c-count-btn {
  width: 34px; height: 34px;
  border: 1px solid var(--border2);
  background: rgba(255,255,255,.04);
  color: var(--text);
  cursor: pointer;
  font-size: 18px; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  transition: background .13s;
}
.c-count-btn:first-child { border-radius: var(--r-sm) 0 0 var(--r-sm); }
.c-count-btn:last-child  { border-radius: 0 var(--r-sm) var(--r-sm) 0; border-left: none; }
.c-count-btn:hover { background: rgba(255,255,255,.08); }
.c-count-num {
  width: 52px; height: 34px;
  border-top: 1px solid var(--border2); border-bottom: 1px solid var(--border2);
  border-left: none; border-right: none;
  background: rgba(0,0,0,.20);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px; font-weight: 700;
  text-align: center;
  outline: none;
}

/* ─── Misc helpers ───────────────────────────────────────────────────────── */
.c-h2 { font-size: 20px; font-weight: 700; letter-spacing: -.2px; }
.c-card {
  border: 1px solid var(--border);
  background: rgba(255,255,255,.02);
  border-radius: var(--r-lg);
  padding: 14px 16px;
}

/* Existing legacy selectors kept for backward compat */
.c-cardrow.is-selected { outline: 2px solid rgba(184,168,255,.35); }
.c-drag { opacity: .6; cursor: grab; user-select: none; padding: 2px 6px; border: 1px solid var(--border2); border-radius: var(--r-sm); background: rgba(255,255,255,.04); }
.c-bulkbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 12px; border-radius: var(--r); border: 1px solid var(--border2); background: rgba(255,255,255,.05); margin-bottom: 12px; }
.c-version-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 12px; border: 1px solid var(--border2); border-radius: var(--r); background: rgba(255,255,255,.04); margin-bottom: 10px; }
.c-cardedit { border: 1px solid rgba(125,162,255,.45); box-shadow: 0 0 0 2px rgba(90,140,255,.12); }


/* ═══════════════════════════════════════════════════════════════════════════
   RESPONSIVE OVERHAUL — Mobile-first additions
   Breakpoints: 320 / 480 / 600 / 760 (tablet) / 1024 (laptop)
   RULE: Never remove existing rules — only add/override below.
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── Hamburger button (mobile sidebar toggle) ───────────────────────────── */
/* Default hidden; shown only on mobile via media query below */
.c-hamburger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border2);
  background: rgba(255,255,255,.04);
  color: var(--text);
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
  flex-shrink: 0;
  transition: background .13s;
  font-family: var(--font);
}
.c-hamburger:hover { background: rgba(255,255,255,.09); }

/* ─── Tabs: prevent overflow on narrow viewports ──────────────────────────── */
/* Tabs already use display:flex — make them scrollable instead of wrapping */
.c-tabs {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none; /* Firefox */
}
.c-tabs::-webkit-scrollbar { display: none; }
.c-tab { flex-shrink: 0; } /* prevent tabs from squishing */

/* ─── 1024px — small laptop tweaks ──────────────────────────────────────── */
@media (max-width: 1024px) {
  /* Sidebar slightly narrower so content area has room */
  .c-sidebar { width: 240px; flex: 0 0 240px; }
}

/* ─── 760px — tablet / large mobile ─────────────────────────────────────── */
@media (max-width: 760px) {

  /* Show hamburger trigger */
  .c-hamburger { display: flex; }

  /* Sidebar: hidden off-screen, slides in as overlay */
  .c-sidebar {
    position: fixed !important;
    left: 0; top: 0; bottom: 0;
    width: 270px;
    z-index: 1001;
    transform: translateX(-100%);
    transition: transform .26s cubic-bezier(.16,1,.3,1);
    box-shadow: var(--shadow-lg);
    /* Ensure it still has a background (inherits from original rule) */
    background: #0f1214 !important;
    overflow-y: auto;
  }

  /* Sidebar open state — toggled by JS adding class to <body> */
  body.cardai-nav-open .c-sidebar {
    transform: translateX(0);
  }

  /* Dimmed backdrop behind open sidebar */
  body.cardai-nav-open::after {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.55);
    z-index: 1000;
    cursor: pointer;
    animation: fadeIn .18s ease both;
  }

  /* Topbar: hamburger on the left, brand stays, actions on right */
  .c-topbar {
    flex-wrap: wrap;
    gap: 10px;
    padding: 12px 16px;
  }
  .c-topbar-right {
    flex-wrap: wrap;
    gap: 8px;
  }

  /* Hide dense stat boxes from topbar on tablet — saves horizontal space */
  .c-statbox { display: none; }

  /* Study layout: queue drops below the question on tablet */
  .c-study {
    grid-template-columns: 1fr !important;
  }
  .c-queue {
    border-left: none !important;
    border-top: 1px solid var(--border);
    max-height: 220px;
  }
  .c-queue-list { max-height: 150px; }

  /* Deck header action buttons wrap cleanly */
  .c-deck-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .c-deck-actions { flex-wrap: wrap; }

  /* Deck-detail title scales down */
  .c-deck-h1 { font-size: 26px; }

  /* Content padding reduced for smaller viewports */
  .c-content { padding: 18px 18px 32px; }

  /* Card list padding */
  .c-cardlist { padding: 14px 16px 80px; }

  /* Docbar margin */
  .c-docbar { margin: 12px 14px 0; }
}

/* ─── 600px — wide mobile ────────────────────────────────────────────────── */
@media (max-width: 600px) {

  /* Page title */
  .c-page-title { font-size: 20px; margin: 8px 0 16px; }

  /* Stats grid: 2 columns */
  .c-stats-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }

  /* Report cards: 2 columns */
  .c-report-cards { grid-template-columns: repeat(2, 1fr); }

  /* Deck header title */
  .c-deck-h1 { font-size: 22px; letter-spacing: -.3px; }

  /* Select inputs: remove hardcoded min-width */
  .c-select { min-width: 0; width: 100%; }

  /* Tag input: remove fixed width */
  .c-tagwrap input { width: 100%; }

  /* Modal: slide-up sheet on mobile */
  .c-modal-backdrop {
    align-items: flex-end;
    padding: 0;
  }
  .c-modal {
    width: 100% !important;
    max-width: 100%;
    border-radius: var(--r-xl) var(--r-xl) 0 0 !important;
    max-height: 92vh;
  }

  /* Toast: full-width with safe margins */
  .c-toast {
    right: 12px;
    left: 12px;
    bottom: 16px;
    max-width: none;
    width: auto;
  }

  /* Mode group buttons wrap */
  .c-mode-group { flex-wrap: wrap; }

  /* Primary CTA full-width in topbar on mobile */
  .c-topbar-right .c-btn-primary {
    flex: 1 1 auto;
    justify-content: center;
  }
}

/* ─── 480px — typical small phone ────────────────────────────────────────── */
@media (max-width: 480px) {

  /* Base font size bump for readability on tiny screens */
  #cardai-app { font-size: 13px; }

  /* Deck grid: single column (overrides the 760px rule) */
  .c-grid { grid-template-columns: 1fr; }

  /* Stat value: slightly smaller */
  .c-statval { font-size: 22px; }

  /* Stats panel at bottom */
  .c-stats-grid { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 8px; }
  .c-stats-panels { grid-template-columns: 1fr; }

  /* Question card padded reasonably */
  .c-question-card { padding: 18px 16px 16px; min-height: 160px; }
  .c-question-text { font-size: 17px; }

  /* Grade buttons: 2 per row so they don't become too narrow */
  .c-grade-row { display: grid; grid-template-columns: repeat(2, 1fr); }
  .c-grade-btn { flex: unset; }

  /* Deck page header stacks fully */
  .c-deck-h1 { font-size: 20px; }

  /* Content padding */
  .c-content { padding: 14px 14px 28px; }
  .c-cardlist { padding: 10px 14px 80px; }
  .c-deck-header { padding: 14px 14px 0; }

  /* Docbar margin */
  .c-docbar { margin: 10px 10px 0; }
  .c-docbar-input { font-size: 12px; }

  /* Login card padding */
  .c-login-card { padding: 24px 18px; }

  /* Modal body padding */
  .c-modal-b { padding: 14px; }
  .c-modal-h { padding: 14px 16px; }
  .c-modal-f { padding: 12px 14px; }

  /* Study topbar */
  .c-study-topbar { padding: 10px 14px; gap: 8px; }
  .c-study-title { font-size: 14px; }

  /* Study queue on mobile */
  .c-study-left { padding: 14px 14px 16px; gap: 12px; }
  .c-queue { padding: 12px 10px; }

  /* Editwrap */
  .c-editwrap { padding: 12px; }
  .c-edithead { flex-direction: column; align-items: flex-start; }

  /* Bulk bar */
  .c-bulkbar { flex-direction: column; align-items: flex-start; gap: 8px; }
}

/* ─── 320px — smallest supported viewport ────────────────────────────────── */
@media (max-width: 320px) {

  /* Prevent any element from overflowing viewport */
  #cardai-app, #cardai-app * { max-width: 100%; }

  /* Typography */
  .c-page-title { font-size: 17px; }
  .c-deck-h1   { font-size: 18px; }
  .c-statval   { font-size: 18px; }
  .c-question-text { font-size: 15px; }
  .c-h2        { font-size: 16px; }
  .c-btn       { font-size: 12px; padding: 8px 12px; }

  /* Stats: single column */
  .c-stats-grid { grid-template-columns: 1fr; }

  /* Grade buttons: single row (2-col already, stays or shrinks) */
  .c-grade-btn { padding: 9px 6px; font-size: 12px; }

  /* Topbar brand text hides on very small */
  .c-brand { font-size: 20px; }

  /* Modal */
  .c-modal-b { padding: 10px 12px; }

  /* Smaller padding across content areas */
  .c-content { padding: 10px 10px 24px; }
  .c-deck-header { padding: 10px 10px 0; }
  .c-cardlist { padding: 8px 10px 70px; }

  /* Toast */
  .c-toast { right: 8px; left: 8px; font-size: 12px; padding: 9px 12px; }
}

/* ─── Overflow safety net (all viewports) ────────────────────────────────── */
/* Prevent horizontal scroll caused by any child exceeding viewport width */
#cardai-app {
  overflow-x: hidden;
}
.c-shell {
  /* Ensure shell itself never causes h-scroll inside the page */
  max-width: 100%;
}
/* Tables (if any remain) scroll horizontally rather than overflow */
.c-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* ─── Utility: responsive helpers ────────────────────────────────────────── */
/* Hide on mobile */
@media (max-width: 760px) { .r-hide-mobile { display: none !important; } }
/* Hide on desktop */
@media (min-width: 761px) { .r-hide-desktop { display: none !important; } }