/* ============================================================
   PM 覺醒 — 遊戲化層 Gamification UI
   角色 HUD · 技能節點 · 任務卡 · 成就徽章
   ============================================================ */

/* ---- image slots fill their containers (real <img>, cover-fit) ---- */
.char-slot {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center;
  background: linear-gradient(160deg, rgba(24,216,255,.10), rgba(139,92,246,.14));
}
.teacher-frame { position: relative; width: 100%; aspect-ratio: 4/5; }
.teacher-slot { position: absolute; inset: 0; display: block; width: 100%; height: 100%; border-radius: 20px; object-fit: cover; object-position: center; }
.cover-slot { position: absolute; inset: 0; width: 100%; height: 100%; display: block; object-fit: cover; object-position: center; }

/* ---- Hero character HUD (game heads-up display) ---- */
.hud {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  z-index: 4;
  padding: 16px 18px 16px;
  background: linear-gradient(0deg, rgba(6,9,18,.92) 30%, transparent);
  pointer-events: none;
}
.hud-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.hud-lv {
  font-family: var(--font-tech);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: #04111c;
  padding: 4px 10px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  box-shadow: 0 0 16px rgba(24,216,255,.5);
}
.hud-class {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: .02em;
}
.hud-class::before {
  content: "◆";
  color: var(--accent-purple);
  margin-right: 7px;
  font-size: 10px;
  vertical-align: middle;
}
.hud-xp {
  height: 8px;
  border-radius: 99px;
  background: rgba(148,163,184,.18);
  overflow: hidden;
  border: 1px solid rgba(24,216,255,.2);
}
.hud-xp > span {
  display: block;
  height: 100%;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  box-shadow: 0 0 12px rgba(24,216,255,.6);
  position: relative;
  animation: xpfill 1.6s cubic-bezier(.16,.84,.44,1) both;
  animation-delay: .4s;
}
@keyframes xpfill { from { width: 0 !important; } }
.hud-xp-label {
  font-family: var(--font-tech);
  font-size: 10.5px;
  letter-spacing: .04em;
  color: var(--accent-cyan);
  margin-top: 7px;
}

/* ---- player stat chips floating near hero (top of stage) ---- */
.hero-hud-tag {
  position: absolute;
  top: -2%;
  right: 8%;
  z-index: 4;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 12px;
  border-radius: 10px;
  background: linear-gradient(160deg, rgba(18,26,50,.95), rgba(11,16,33,.96));
  border: 1px solid rgba(250,204,21,.4);
  box-shadow: 0 10px 28px rgba(0,0,0,.4);
  font-family: var(--font-tech);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--accent-gold);
}
.hero-hud-tag svg { width: 14px; height: 14px; }

/* ---- Quest / course-card game chips ---- */
.quest-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.chip-lv {
  font-family: var(--font-tech);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .05em;
  padding: 3px 9px;
  border-radius: 6px;
  color: var(--accent-cyan);
  background: rgba(24,216,255,.08);
  border: 1px solid rgba(24,216,255,.3);
}
.chip-diff {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-tech);
  font-size: 11px;
  color: var(--text-muted);
}
.chip-diff i {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: rgba(148,163,184,.25);
  display: inline-block;
}
.chip-diff i.on { background: var(--accent-gold); box-shadow: 0 0 7px rgba(250,204,21,.6); }
.chip-xp {
  margin-left: auto;
  font-family: var(--font-tech);
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-purple);
  letter-spacing: .03em;
}

/* ---- Skill tree → game nodes ---- */
.skilltree {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px 26px;
}
.skill-card { z-index: 2; }
.skill-card.locked { opacity: .62; }
.skill-card.locked:hover { opacity: .8; }
.skill-card .skill-state {
  font-family: var(--font-tech);
  font-size: 10px;
  letter-spacing: .1em;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.skill-card.unlocked .skill-state { color: var(--accent-green); }
.skill-card.locked .skill-state { color: var(--text-muted); }
.skill-state svg { width: 12px; height: 12px; }
.skill-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-soft);
}
.skill-cost {
  font-family: var(--font-tech);
  font-size: 11px;
  color: var(--accent-gold);
  letter-spacing: .03em;
}

/* connector lines behind the skill grid (desktop) */
.skilltree::before {
  content: "";
  position: absolute;
  inset: 26px 16% auto 16%;
  height: 1px;
  background: repeating-linear-gradient(90deg, rgba(139,92,246,.3) 0 8px, transparent 8px 16px);
  top: 50%;
  display: none;
}

/* ---- Achievement badges row ---- */
.achv {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 44px;
}
.achv-card {
  text-align: center;
  padding: 24px 16px;
  border-radius: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.achv-card:hover { transform: translateY(-4px); border-color: rgba(250,204,21,.4); box-shadow: 0 0 36px rgba(250,204,21,.12); }
.achv-medal {
  width: 56px; height: 56px;
  margin: 0 auto 14px;
  border-radius: 16px;
  display: grid; place-items: center;
  background: linear-gradient(150deg, rgba(250,204,21,.14), rgba(139,92,246,.14));
  border: 1px solid rgba(250,204,21,.3);
  color: var(--accent-gold);
}
.achv-medal svg { width: 28px; height: 28px; }
.achv-card h4 { font-size: 15px; font-weight: 700; margin: 0 0 6px; }
.achv-card p { font-size: 12.5px; color: var(--text-muted); margin: 0; line-height: 1.55; }

/* instructor → NPC mentor card flavour */
.npc-tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-tech);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--accent-purple);
  padding: 5px 11px;
  border-radius: 7px;
  border: 1px solid rgba(139,92,246,.3);
  background: rgba(139,92,246,.07);
  margin-bottom: 16px;
}
.npc-tag svg { width: 13px; height: 13px; }

@media (min-width: 861px) {
  .skilltree::before { display: block; }
}
@media (max-width: 860px) {
  .skilltree { grid-template-columns: 1fr 1fr; }
  .achv { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .skilltree { grid-template-columns: 1fr; }
  .achv { grid-template-columns: 1fr 1fr; }
  .hero-hud-tag { top: 0; right: 2%; }
}