:root {
  --ink: #10141c;
  --ink-2: #1a2230;
  --paper: #f4e9d3;
  --chakra: #4fc3f7;
  --chakra-dim: #2b6f8e;
  --flame: #ff8a3d;
  --good: #6fdc8c;
  --text: #e8ecf3;
  --muted: #93a0b4;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", system-ui, sans-serif;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(79, 195, 247, 0.08), transparent 60%),
    radial-gradient(900px 500px at 10% 110%, rgba(255, 138, 61, 0.06), transparent 60%),
    var(--ink);
  color: var(--text);
  min-height: 100vh;
}

/* ---- Top bar ---- */
.topbar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.8rem 1.4rem;
  border-bottom: 1px solid rgba(79, 195, 247, 0.15);
  background: rgba(16, 20, 28, 0.85);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
}

.brand { font-size: 1.15rem; font-weight: 700; letter-spacing: 0.02em; }
.brand-kanji {
  color: var(--chakra);
  font-size: 1.5rem;
  vertical-align: -2px;
  margin-right: 0.15rem;
}

.nav { display: flex; gap: 0.3rem; flex: 1; }
.nav button {
  background: none;
  border: none;
  color: var(--muted);
  font: inherit;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
}
.nav button.active { color: var(--text); background: rgba(79, 195, 247, 0.12); }
.nav button:hover { color: var(--text); }

.identity { display: flex; align-items: center; gap: 0.7rem; }
.rank-badge {
  background: rgba(79, 195, 247, 0.12);
  border: 1px solid rgba(79, 195, 247, 0.35);
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  font-size: 0.85rem;
}
.xp-badge { color: var(--flame); font-weight: 600; font-size: 0.9rem; }

/* ---- Layout ---- */
#app { max-width: 1080px; margin: 0 auto; padding: 1.6rem 1.4rem 4rem; }
.screen.hidden, .hidden { display: none !important; }
.section-title { margin: 2rem 0 0.9rem; font-size: 1.15rem; }
.section-title .sub { color: var(--muted); font-weight: 400; font-size: 0.9rem; }
.muted { color: var(--muted); }

button {
  font: inherit;
  cursor: pointer;
  border-radius: 10px;
  border: 1px solid rgba(79, 195, 247, 0.35);
  background: rgba(79, 195, 247, 0.12);
  color: var(--text);
  padding: 0.5rem 1rem;
}
button.primary { background: var(--chakra); color: #06222f; font-weight: 700; border: none; }
button.ghost { background: none; border-color: rgba(147, 160, 180, 0.35); color: var(--muted); }
button.ghost:hover { color: var(--text); }
button.danger { border-color: rgba(255, 100, 100, 0.4); color: #ff9b9b; }

/* ---- Rank path ---- */
.rank-path { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.rank-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  padding: 0.7rem 1.1rem;
  border-radius: var(--radius);
  border: 1px solid rgba(147, 160, 180, 0.2);
  background: var(--ink-2);
  min-width: 108px;
  opacity: 0.45;
}
.rank-node .icon { font-size: 1.5rem; }
.rank-node .label { font-size: 0.8rem; color: var(--muted); }
.rank-node.reached { opacity: 1; border-color: rgba(79, 195, 247, 0.45); }
.rank-node.current {
  opacity: 1;
  border-color: var(--chakra);
  box-shadow: 0 0 18px rgba(79, 195, 247, 0.25);
}
.rank-node.current .label { color: var(--chakra); font-weight: 600; }
.rank-arrow { color: var(--muted); }

/* ---- Seal grid ---- */
.seal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.8rem;
}
.seal-card {
  position: relative;
  background: var(--ink-2);
  border: 1px solid rgba(147, 160, 180, 0.2);
  border-radius: var(--radius);
  padding: 0.9rem;
  text-align: center;
  cursor: pointer;
  transition: transform 0.12s ease, border-color 0.12s ease;
}
.seal-card:hover { transform: translateY(-2px); border-color: var(--chakra-dim); }
.seal-card .emoji { font-size: 2rem; }
.seal-card .kanji { position: absolute; top: 0.5rem; right: 0.7rem; color: var(--muted); font-size: 0.95rem; }
.seal-card .name { font-weight: 600; margin-top: 0.3rem; }
.seal-card .romaji { color: var(--muted); font-size: 0.8rem; }
.seal-card .best { font-size: 0.78rem; color: var(--chakra); margin-top: 0.35rem; }
.seal-card.done { border-color: rgba(111, 220, 140, 0.45); }
.seal-card.done::after {
  content: "✓";
  position: absolute;
  top: 0.4rem;
  left: 0.6rem;
  color: var(--good);
  font-weight: 700;
}
.seal-card .cal-tag { font-size: 0.72rem; color: var(--good); margin-top: 0.3rem; }

/* ---- Jutsu list ---- */
.jutsu-list { display: flex; flex-direction: column; gap: 0.7rem; }
.jutsu-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--ink-2);
  border: 1px solid rgba(147, 160, 180, 0.2);
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  cursor: pointer;
}
.jutsu-card:hover { border-color: var(--chakra-dim); }
.jutsu-card.locked { opacity: 0.45; cursor: not-allowed; }
.jutsu-card .jname { font-weight: 600; }
.jutsu-card .jname .romaji { color: var(--muted); font-weight: 400; font-size: 0.82rem; margin-left: 0.4rem; }
.jutsu-card .blurb { color: var(--muted); font-size: 0.85rem; margin-top: 0.15rem; }
.jutsu-card .seq-preview { margin-left: auto; font-size: 1.1rem; letter-spacing: 0.15em; white-space: nowrap; }
.jutsu-card .grade { font-size: 1.3rem; font-weight: 800; min-width: 2rem; text-align: center; }
.grade.S { color: #ffd54f; } .grade.A { color: var(--good); }
.grade.B { color: var(--chakra); } .grade.C { color: var(--muted); }
.jutsu-rank-tag {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  border: 1px solid rgba(147, 160, 180, 0.3);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
}

/* ---- Training ---- */
.back { margin-bottom: 1rem; }
.train-layout { display: grid; grid-template-columns: 1.4fr 1fr; gap: 1.2rem; }
@media (max-width: 860px) { .train-layout { grid-template-columns: 1fr; } }

.cam-wrap {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(79, 195, 247, 0.25);
}
.cam-wrap video, .cam-wrap canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scaleX(-1);
}
.cam-status {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  background: rgba(16, 20, 28, 0.75);
  font-size: 0.95rem;
  text-align: center;
  padding: 1rem;
}

.meter-wrap { display: flex; align-items: center; gap: 0.8rem; margin-top: 0.8rem; }
.meter {
  flex: 1;
  height: 12px;
  border-radius: 999px;
  background: var(--ink-2);
  overflow: hidden;
  border: 1px solid rgba(147, 160, 180, 0.2);
}
.meter-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--chakra-dim), var(--chakra));
  transition: width 0.12s linear;
}
.meter-fill.hot { background: linear-gradient(90deg, var(--chakra), var(--good)); }
.meter-label { min-width: 3.2em; text-align: right; font-variant-numeric: tabular-nums; }

.drill-panel {
  background: var(--ink-2);
  border: 1px solid rgba(147, 160, 180, 0.2);
  border-radius: var(--radius);
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
}

.seq-strip { display: flex; gap: 0.35rem; flex-wrap: wrap; justify-content: center; }
.seq-strip .step {
  font-size: 1.3rem;
  opacity: 0.35;
  padding: 0.2rem 0.3rem;
  border-radius: 8px;
}
.seq-strip .step.current {
  opacity: 1;
  background: rgba(79, 195, 247, 0.15);
  outline: 1px solid var(--chakra);
}
.seq-strip .step.done { opacity: 0.9; filter: none; }
.seq-strip .step.done::after { content: "✓"; font-size: 0.7rem; color: var(--good); vertical-align: top; }

.target-card { text-align: center; }
.target-card .kanji { font-size: 1.3rem; color: var(--chakra); margin-left: 0.3rem; }
.target-card h3 { margin: 0.3rem 0 0.1rem; }
.target-card .romaji { color: var(--muted); font-size: 0.85rem; font-weight: 400; }
.target-card .hint { color: var(--muted); font-size: 0.88rem; margin-top: 0.6rem; line-height: 1.45; }
/* Smaller since training: the on-camera ghost guide is the primary reference. */
.target-card .seal-diagram { width: 130px; margin-top: 0.4rem; opacity: 0.85; }
.seal-card .seal-diagram { width: 104px; margin: 0.1rem auto; display: block; }

#hold-ring-wrap { position: relative; width: 120px; height: 120px; }
.hold-ring { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: rgba(147, 160, 180, 0.2); stroke-width: 8; }
.ring-fg {
  fill: none;
  stroke: var(--chakra);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 326.7;
  stroke-dashoffset: 326.7;
}
.ring-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  text-align: center;
}

.drill-hint { color: var(--muted); text-align: center; min-height: 2.4em; font-size: 0.9rem; }

/* ---- Learn mode ---- */
.learn-layout {
  max-width: 620px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
  text-align: center;
}
.learn-title { margin: 0; font-size: 1.3rem; }
.learn-title .kanji { color: var(--chakra); margin-left: 0.3rem; }
.learn-title .romaji { color: var(--muted); font-size: 0.9rem; font-weight: 400; }
.learn-anim {
  background: var(--ink-2);
  border: 1px solid rgba(147, 160, 180, 0.2);
  border-radius: var(--radius);
  padding: 0.8rem;
  width: 100%;
}
.learn-anim .seal-diagram { width: min(440px, 100%); display: block; margin: 0 auto; }
.learn-actions { display: flex; gap: 0.7rem; align-items: center; }
.learn-actions .primary { padding: 0.6rem 1.6rem; }
.seq-strip .step[data-learn-step] { cursor: pointer; }

/* ---- Celebration overlay ---- */
.celebration {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  text-align: center;
  background: radial-gradient(ellipse at center, rgba(16, 20, 28, 0.55), rgba(16, 20, 28, 0.85));
  animation: celebration-in 0.35s ease-out;
  padding: 1rem;
}
@keyframes celebration-in {
  from { opacity: 0; transform: scale(1.06); }
  to { opacity: 1; transform: scale(1); }
}
.celebration-emoji { font-size: 3.2rem; animation: celebration-pop 0.6s cubic-bezier(0.2, 1.6, 0.4, 1); }
@keyframes celebration-pop {
  from { transform: scale(0); }
  to { transform: scale(1); }
}
.celebration h3 { margin: 0; font-size: 1.5rem; }
.celebration-accuracy {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--good);
  font-variant-numeric: tabular-nums;
}
.celebration-detail { color: var(--text); font-size: 1rem; line-height: 1.6; min-height: 1.6em; }
.celebration-detail .grade { font-weight: 800; font-size: 1.15rem; }
.celebration-actions { display: flex; gap: 0.7rem; margin-top: 0.7rem; }
.confetti { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.confetti::before, .confetti::after {
  position: absolute;
  top: -2rem;
  font-size: 1.6rem;
  animation: confetti-fall 2.6s linear infinite;
}
.confetti::before { content: "🎊"; left: 22%; }
.confetti::after { content: "✨"; left: 68%; animation-delay: 1.2s; }
@keyframes confetti-fall {
  from { transform: translateY(0) rotate(0deg); opacity: 1; }
  to { transform: translateY(70vh) rotate(340deg); opacity: 0; }
}

/* ---- Leaderboard ---- */
.board { width: 100%; border-collapse: collapse; }
.board th, .board td { text-align: left; padding: 0.6rem 0.8rem; }
.board thead th { color: var(--muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; }
.board tbody tr { background: var(--ink-2); }
.board tbody tr:nth-child(odd) { background: rgba(26, 34, 48, 0.55); }
.board td:last-child { color: var(--flame); font-weight: 600; }

/* ---- Settings ---- */
.settings-actions { display: flex; gap: 0.8rem; margin-top: 1.4rem; }

/* ---- Auth modal ---- */
dialog {
  background: var(--ink-2);
  color: var(--text);
  border: 1px solid rgba(79, 195, 247, 0.3);
  border-radius: var(--radius);
  padding: 1.6rem;
  min-width: 320px;
}
dialog::backdrop { background: rgba(0, 0, 0, 0.6); }
#auth-form { display: flex; flex-direction: column; gap: 0.8rem; }
#auth-form h3 { margin: 0 0 0.2rem; }
#auth-form input {
  font: inherit;
  padding: 0.55rem 0.8rem;
  border-radius: 10px;
  border: 1px solid rgba(147, 160, 180, 0.3);
  background: var(--ink);
  color: var(--text);
}
.modal-actions { display: flex; gap: 0.6rem; }
.modal-actions button { flex: 1; }
.error { color: #ff9b9b; font-size: 0.85rem; min-height: 1.2em; margin: 0; }

/* ---- Toast ---- */
.toast {
  position: fixed;
  bottom: 1.6rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink-2);
  border: 1px solid var(--chakra);
  border-radius: 999px;
  padding: 0.7rem 1.4rem;
  box-shadow: 0 6px 28px rgba(0, 0, 0, 0.5);
  z-index: 50;
  font-weight: 600;
}