/* SGE 文案助手 - Skill Tree (GEO 技能樹) */
/* ========================================
   GEO 文案冒險學院 — 技能樹元件
   5 個 GEO 維度以「技能結晶」呈現學習進度
   ======================================== */

/* ----------------------------------------
   Container — 搭配 .card 使用
   ---------------------------------------- */
.skill-tree {
  position: relative;
  overflow: hidden;
}

/* 裝飾底紋 — RPG 風格的微弱光暈 */
.skill-tree::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 15% 50%, rgba(212, 165, 165, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse at 85% 50%, rgba(184, 169, 201, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.skill-tree__header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  color: var(--color-text);
  position: relative;
  z-index: 1;
}

.skill-tree__header h3 {
  font-size: 1rem;
  font-weight: 700;
  font-family: var(--font-heading);
}

.skill-tree__header-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.skill-tree__header-sub {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-family: var(--font-ui);
  font-weight: 400;
  margin-left: auto;
}

/* ----------------------------------------
   Grid — 5 個技能結晶橫排
   ---------------------------------------- */
.skill-tree__grid {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  position: relative;
  z-index: 1;
}

/* 空狀態引導文字 */
.skill-tree__hint {
  margin-top: var(--space-md);
  padding: 0 var(--space-sm);
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  text-align: center;
}

/* 連線 — 在結晶中心高度繪製一條淡色連接線 */
.skill-tree__grid {
  background-image: linear-gradient(
    to right,
    transparent 0%,
    var(--color-border-light) 8%,
    var(--color-border) 45%,
    var(--color-secondary-light) 50%,
    var(--color-border) 55%,
    var(--color-border-light) 92%,
    transparent 100%
  );
  background-size: 100% 1px;
  background-position: 0 32px;
  background-repeat: no-repeat;
}

/* ----------------------------------------
   Skill Crystal — 單一技能結晶
   ---------------------------------------- */
.skill-crystal {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  position: relative;
  z-index: 2;
  flex: 1;
  min-width: 0;
  transition: transform var(--transition-fast);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.skill-crystal:active {
  transform: scale(0.96);
}

/* ============ 水晶球體 ============ */
.skill-crystal__orb {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: var(--color-bg-card);
  border: 2px solid var(--color-border);
  transition: all var(--transition-normal);
  position: relative;
  flex-shrink: 0;
  will-change: transform, box-shadow;
}

/* ---------- 狀態：未解鎖 ---------- */
.skill-crystal.locked .skill-crystal__orb {
  background: var(--color-bg-hover);
  border-color: var(--color-border-light);
  filter: grayscale(1);
  opacity: 0.45;
}

/* ---------- 狀態：學習中 ---------- */
.skill-crystal.learning .skill-crystal__orb {
  border-color: var(--color-primary);
  background: linear-gradient(145deg, var(--color-bg-card), rgba(212, 165, 165, 0.08));
  box-shadow:
    0 0 10px rgba(212, 165, 165, 0.25),
    0 0 24px rgba(212, 165, 165, 0.08);
}

/* 學習中光暈脈衝 */
.skill-crystal.learning .skill-crystal__orb::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)) border-box;
  -webkit-mask:
    linear-gradient(#fff 0 0) padding-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: skill-orb-pulse 2.5s ease-in-out infinite;
}

/* ---------- 狀態：熟練 ---------- */
.skill-crystal.mastered .skill-crystal__orb {
  border-color: var(--color-success);
  background: linear-gradient(145deg, var(--color-bg-card), rgba(127, 174, 127, 0.06));
  box-shadow:
    0 0 10px rgba(127, 174, 127, 0.3),
    0 0 24px rgba(127, 174, 127, 0.1);
}

/* 熟練星印 */
.skill-crystal.mastered .skill-crystal__orb::after {
  content: '✦';
  position: absolute;
  top: -6px;
  right: -6px;
  font-size: 0.75rem;
  color: var(--color-success);
  filter: drop-shadow(0 0 4px rgba(127, 174, 127, 0.5));
}

/* ---------- Hover ---------- */
@media (hover: hover) {
  .skill-crystal:not(.locked):hover {
    transform: translateY(-2px);
  }

  .skill-crystal:not(.locked):hover .skill-crystal__orb {
    transform: scale(1.08);
    box-shadow: 0 0 18px rgba(212, 165, 165, 0.35);
  }

  .skill-crystal.mastered:not(.locked):hover .skill-crystal__orb {
    box-shadow: 0 0 18px rgba(127, 174, 127, 0.4);
  }
}

/* ============ 結晶下方資訊 ============ */

/* 技能名稱 */
.skill-crystal__name {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text);
  text-align: center;
  line-height: 1.35;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.skill-crystal.locked .skill-crystal__name {
  color: var(--color-text-light);
}

.skill-crystal.learning .skill-crystal__name {
  color: var(--color-primary-dark);
}

.skill-crystal.mastered .skill-crystal__name {
  color: #5A8F5E;
}

/* 分數 */
.skill-crystal__score {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.skill-crystal__score-max {
  font-weight: 400;
  color: var(--color-text-muted);
}

.skill-crystal.locked .skill-crystal__score {
  color: var(--color-text-light);
}

.skill-crystal.learning .skill-crystal__score {
  color: var(--color-primary-dark);
}

.skill-crystal.mastered .skill-crystal__score {
  color: #5A8F5E;
}

/* 等級徽章 */
.skill-crystal__level {
  font-family: var(--font-small);
  font-size: 0.625rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--color-bg-hover);
  color: var(--color-text-muted);
  font-weight: 600;
  letter-spacing: 0.3px;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.skill-crystal.learning .skill-crystal__level {
  background: rgba(212, 165, 165, 0.15);
  color: var(--color-primary-dark);
}

.skill-crystal.mastered .skill-crystal__level {
  background: rgba(127, 174, 127, 0.15);
  color: #4A7A4E;
}

/* ============ 展開說明面板 ============ */
.skill-crystal__detail {
  display: none;
  position: absolute;
  top: calc(100% + var(--space-sm));
  left: 50%;
  transform: translateX(-50%);
  width: 240px;
  max-width: 85vw;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  box-shadow: var(--shadow-md);
  z-index: 20;
  text-align: left;
  pointer-events: auto;
}

.skill-crystal.expanded .skill-crystal__detail {
  display: block;
  animation: skill-detail-in 0.2s ease both;
}

/* 三角形箭頭 */
.skill-crystal__detail::before {
  content: '';
  position: absolute;
  top: -5px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 10px;
  height: 10px;
  background: var(--color-bg-card);
  border-left: 1px solid var(--color-border);
  border-top: 1px solid var(--color-border);
}

.skill-crystal__detail-title {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.skill-crystal__detail-title .skill-crystal__detail-icon {
  font-size: 1rem;
}

.skill-crystal__detail-desc {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: var(--space-sm);
}

.skill-crystal__detail-why {
  font-family: var(--font-ui);
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  padding: var(--space-sm);
  background: var(--color-bg-hover);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-secondary-light);
}

.skill-crystal__detail-why strong {
  color: var(--color-text-secondary);
  font-weight: 600;
}

/* 關閉按鈕 */
.skill-crystal__detail-close {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.625rem;
  color: var(--color-text-muted);
  background: var(--color-bg-hover);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  line-height: 1;
}

.skill-crystal__detail-close:hover {
  background: var(--color-border);
  color: var(--color-text);
}

/* ============ Progress Ring (SVG) ============ */
.skill-crystal__ring {
  position: absolute;
  inset: -4px;
  width: calc(100% + 8px);
  height: calc(100% + 8px);
  transform: rotate(-90deg);
  pointer-events: none;
}

.skill-crystal__ring-track {
  fill: none;
  stroke: var(--color-border-light);
  stroke-width: 2;
}

.skill-crystal__ring-fill {
  fill: none;
  stroke-width: 2.5;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.8s ease;
}

.skill-crystal.learning .skill-crystal__ring-fill {
  stroke: var(--color-primary);
}

.skill-crystal.mastered .skill-crystal__ring-fill {
  stroke: var(--color-success);
}

/* ----------------------------------------
   Animations
   ---------------------------------------- */
@keyframes skill-orb-pulse {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 0.3; }
}

@keyframes skill-detail-in {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

/* ----------------------------------------
   Dark Mode Overrides
   ---------------------------------------- */
@media (prefers-color-scheme: dark) {
  .skill-crystal__detail {
    border-color: var(--color-border);
  }

  .skill-crystal__detail::before {
    border-left-color: var(--color-border);
    border-top-color: var(--color-border);
  }

  .skill-crystal.learning .skill-crystal__orb {
    box-shadow:
      0 0 12px rgba(212, 165, 165, 0.2),
      0 0 28px rgba(212, 165, 165, 0.06);
  }

  .skill-crystal.mastered .skill-crystal__orb {
    box-shadow:
      0 0 12px rgba(127, 174, 127, 0.25),
      0 0 28px rgba(127, 174, 127, 0.08);
  }

  .skill-crystal__level {
    background: rgba(255, 255, 255, 0.06);
  }

  .skill-crystal.learning .skill-crystal__level {
    background: rgba(212, 165, 165, 0.2);
  }

  .skill-crystal.mastered .skill-crystal__level {
    background: rgba(127, 174, 127, 0.2);
  }

  .skill-crystal__detail-why {
    background: rgba(255, 255, 255, 0.03);
  }

  .skill-crystal__detail-close {
    background: rgba(255, 255, 255, 0.08);
  }

  .skill-crystal__detail-close:hover {
    background: rgba(255, 255, 255, 0.15);
  }
}

/* ----------------------------------------
   Responsive
   ---------------------------------------- */

/* Tablet — 3+2 排列 */
@media (max-width: 1024px) {
  .skill-tree__grid {
    flex-wrap: wrap;
    gap: var(--space-md) var(--space-lg);
    background-image: none;
  }

  .skill-crystal {
    flex: 0 0 calc(33.33% - var(--space-lg) * 2 / 3);
    max-width: 140px;
  }

  .skill-crystal__detail {
    left: 50%;
    transform: translateX(-50%);
  }
}

/* Mobile — 2+2+1 排列 */
@media (max-width: 768px) {
  .skill-tree__grid {
    gap: var(--space-lg) var(--space-md);
  }

  .skill-crystal {
    flex: 0 0 calc(50% - var(--space-md) / 2);
    max-width: none;
  }

  .skill-crystal__orb {
    width: 56px;
    height: 56px;
    font-size: 1.3rem;
  }

  .skill-crystal__detail {
    width: 220px;
  }

  .skill-tree__header-sub {
    display: none;
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  .skill-tree__grid {
    gap: var(--space-md);
  }

  .skill-crystal {
    flex: 0 0 calc(50% - var(--space-md) / 2);
  }

  .skill-crystal__orb {
    width: 48px;
    height: 48px;
    font-size: 1.125rem;
  }

  .skill-crystal__name {
    font-size: 0.6875rem;
  }

  .skill-crystal__score {
    font-size: 0.75rem;
  }

  .skill-crystal__detail {
    width: 200px;
    padding: var(--space-sm) var(--space-md);
  }

  .skill-crystal__detail-desc {
    font-size: 0.6875rem;
  }

  .skill-crystal__detail-why {
    font-size: 0.625rem;
  }
}