/* ========================================
   CSS 自訂屬性 — 深色主題
   ======================================== */
:root {
  --color-primary: #818CF8;
  --color-primary-hover: #6366F1;
  --color-primary-dim: rgba(129, 140, 248, 0.12);
  --color-primary-glow: rgba(129, 140, 248, 0.22);

  --color-bg: #09090B;
  --color-bg-alt: #0F0F13;
  --color-surface: #17171C;
  --color-surface-raised: #1E1E25;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.16);

  --color-text: #F4F4F6;
  --color-text-secondary: #A1A1AA;
  --color-text-muted: #52525B;

  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 28px rgba(0, 0, 0, 0.52);
  --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.64);
  --shadow-primary: 0 4px 22px rgba(129, 140, 248, 0.28);

  --radius: 14px;
  --radius-sm: 8px;
  --max-width: 1100px;
  --nav-height: 64px;
  --font-sans: 'Inter', 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ========================================
   重置與基礎
   ======================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--color-primary-hover);
}

ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ========================================
   按鈕
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-sm { padding: 8px 16px; font-size: 0.82rem; }

.btn-primary {
  background: var(--color-primary);
  color: #09090B;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-primary);
  color: #09090B;
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary-dim);
  transform: translateY(-1px);
  color: var(--color-primary);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}
.btn-ghost:hover {
  color: var(--color-primary);
  background: var(--color-primary-dim);
  border-color: rgba(129, 140, 248, 0.3);
}

.btn:disabled {
  opacity: 0.25;
  cursor: not-allowed;
  transform: none;
}
.btn:disabled:hover { transform: none; box-shadow: none; }

/* ========================================
   導覽列
   ======================================== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(9, 9, 11, 0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1000;
  border-bottom: 1px solid var(--color-border);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.nav.scrolled {
  background: rgba(9, 9, 11, 0.94);
  border-bottom-color: rgba(255, 255, 255, 0.11);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}
.nav-logo:hover { color: var(--color-text); }

.accent { color: var(--color-primary); }

.nav-links { display: flex; gap: 28px; }

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--color-primary); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-secondary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.nav-actions { display: flex; gap: 8px; }

/* ========================================
   首頁橫幅
   ======================================== */
.hero {
  padding: 140px 0 100px;
  position: relative;
  background-image:
    linear-gradient(
      to bottom,
      rgba(9, 9, 11, 0.60) 0%,
      rgba(9, 9, 11, 0.72) 55%,
      rgba(9, 9, 11, 1) 100%
    ),
    url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?auto=format&fit=crop&w=1920&q=80');
  background-size: cover;
  background-position: center center;
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 72px;
}

/* 左：照片 */
.hero-photo {
  flex-shrink: 0;
  width: 280px;
  height: 340px;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--color-border-hover);
  box-shadow: var(--shadow-lg), 0 0 48px rgba(129, 140, 248, 0.08);
  background: var(--color-surface);
  position: relative;
}

.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}

/* 無照片時顯示佔位符 */
.hero-photo img[src="photo.jpg"] ~ .hero-photo-fallback,
.hero-photo img:not([src]) ~ .hero-photo-fallback {
  display: flex;
}

.hero-photo-fallback {
  display: none;
  position: absolute;
  inset: 0;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.3;
  pointer-events: none;
}

/* 右：文字說明 */
.hero-content {
  flex: 1;
  text-align: left;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
  padding-bottom: 8px;
  position: relative;
  background: none;
  border: none;
  padding-left: 0;
  padding-right: 0;
}

.hero-eyebrow::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  border-radius: 99px;
}

.hero-title {
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 10px;
  letter-spacing: -0.025em;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  margin: 0 0 14px;
  line-height: 1.8;
}

.hero-bio {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0 0 40px;
  line-height: 1.9;
  max-width: 480px;
}

.hero-stats {
  display: flex;
  justify-content: flex-start;
  gap: 40px;
  margin-bottom: 36px;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.03em;
  line-height: 1;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 500;
  margin-top: 4px;
}

.hero-cta {
  display: flex;
  justify-content: flex-start;
  gap: 12px;
}

/* ========================================
   區塊通用
   ======================================== */
.section { padding: 96px 0; }
.section-alt { background: var(--color-bg-alt); }

.section-title {
  font-size: 1.7rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 52px;
  letter-spacing: -0.015em;
}

/* ========================================
   能力總覽 — 快照卡片
   ======================================== */
.snapshot-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.snapshot-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 28px;
  box-shadow: var(--shadow-sm);
  transition: all 0.22s ease;
}

.snapshot-card:hover {
  background: var(--color-surface-raised);
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.snapshot-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.snapshot-card p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}

/* ========================================
   能力總覽 — 成果數字卡片
   ======================================== */
.highlight-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.highlight-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all 0.22s ease;
}

.highlight-card:hover {
  background: var(--color-surface-raised);
  border-color: rgba(129, 140, 248, 0.32);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.highlight-stat {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 10px;
}

.highlight-text {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.highlight-detail {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* ========================================
   精選專案
   ======================================== */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: all 0.22s ease;
}

.project-card:hover {
  background: var(--color-surface-raised);
  border-color: var(--color-border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 10px;
}

.project-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
}

.project-role {
  font-size: 0.72rem;
  color: var(--color-primary);
  background: var(--color-primary-dim);
  border: 1px solid rgba(129, 140, 248, 0.2);
  padding: 3px 10px;
  border-radius: 20px;
  white-space: nowrap;
  font-weight: 600;
  flex-shrink: 0;
}

.project-desc {
  color: var(--color-text-secondary);
  font-size: 0.88rem;
  margin-bottom: 14px;
  line-height: 1.75;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}

.project-tech span {
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.76rem;
  font-weight: 500;
}

.project-metrics { margin-bottom: 0; flex: 1; }

.metric {
  font-size: 0.86rem;
  color: var(--color-text-secondary);
  padding: 5px 0;
  position: relative;
  padding-left: 15px;
}

.metric::before {
  content: '';
  position: absolute;
  left: 0; top: 12px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.65;
}

.project-actions {
  display: flex;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

/* ========================================
   深度解析 Modal
   ======================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(10px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border-hover);
  border-radius: var(--radius);
  max-width: 700px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: 40px;
  position: relative;
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.modal-overlay.active .modal { transform: translateY(0); }

.modal-close {
  position: absolute;
  top: 16px; right: 20px;
  background: none;
  border: none;
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--color-text-muted);
  line-height: 1;
  transition: color 0.2s;
}
.modal-close:hover { color: var(--color-text); }

.modal-body h3 {
  font-size: 1.2rem;
  margin-bottom: 24px;
  color: var(--color-text);
  padding-right: 32px;
}

.modal-body h4 {
  font-size: 0.72rem;
  color: var(--color-primary);
  margin: 24px 0 8px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.modal-body p,
.modal-body li {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.85;
}

.modal-body ul { padding-left: 20px; list-style: disc; }

.modal-body pre {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  overflow-x: auto;
  white-space: pre;
  font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  margin: 8px 0;
  line-height: 1.7;
}

/* ========================================
   工作經歷 — 時間線 + 卡片
   ======================================== */
.timeline {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  padding-left: 44px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 11px; top: 8px; bottom: 8px;
  width: 1px;
  background: var(--color-border-hover);
}

.timeline-item {
  position: relative;
  margin-bottom: 24px;
}
.timeline-item:last-child { margin-bottom: 0; }

.timeline-marker {
  position: absolute;
  left: -44px; top: 20px;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  border: 2px solid var(--color-border-hover);
  z-index: 1;
}

.timeline-item:first-child .timeline-marker {
  background: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: 0 0 14px var(--color-primary-glow);
}

/* 經歷卡片 */
.timeline-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 28px;
  box-shadow: var(--shadow-sm);
  transition: all 0.22s ease;
}

.timeline-card:hover {
  background: var(--color-surface-raised);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-md);
}

.timeline-header { margin-bottom: 14px; }

.timeline-date {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.04em;
}

.timeline-header h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin-top: 4px;
  color: var(--color-text);
}

.timeline-company {
  font-weight: 400;
  color: var(--color-text-secondary);
  font-size: 0.92rem;
}

.timeline-card li {
  position: relative;
  padding-left: 16px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 7px;
  line-height: 1.75;
}

.timeline-card li::before {
  content: '';
  position: absolute;
  left: 0; top: 10px;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--color-text-muted);
}

/* ========================================
   技術能力
   ======================================== */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.skill-category {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 32px;
  box-shadow: var(--shadow-sm);
  transition: all 0.22s ease;
}

.skill-category:hover {
  background: var(--color-surface-raised);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-md);
}

.skill-category h3 {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.skill-category li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 0;
}

.skill-category li + li { border-top: 1px solid var(--color-border); }

.skill-category li strong {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
}

.skill-category li span {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ========================================
   聯絡方式
   ======================================== */
.contact-content {
  text-align: center;
  max-width: 520px;
  margin: 0 auto;
}

.contact-intro {
  font-size: 0.97rem;
  color: var(--color-text-secondary);
  margin-bottom: 36px;
  line-height: 1.9;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

.contact-item {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 32px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.22s ease;
  min-width: 300px;
}

.contact-item:hover {
  background: var(--color-primary-dim);
  border-color: rgba(129, 140, 248, 0.35);
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.contact-icon {
  font-size: 1rem;
  opacity: 0.7;
}

/* ========================================
   頁尾
   ======================================== */
.footer {
  padding: 28px 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.82rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}

/* ========================================
   捲動顯現動畫
   ======================================== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   響應式設計
   ======================================== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0; right: 0;
    background: rgba(9, 9, 11, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 12px 24px;
    gap: 0;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-links.open { display: flex; }

  .nav-links li a {
    display: block;
    padding: 13px 0;
    border-bottom: 1px solid var(--color-border);
  }
  .nav-links li:last-child a { border-bottom: none; }

  .nav-toggle { display: flex; }
  .nav-actions { display: none; }

  .hero { padding: 100px 0 64px; }
  .hero-inner { flex-direction: column; gap: 36px; text-align: center; }
  .hero-photo { width: 180px; height: 220px; }
  .hero-content { text-align: center; }
  .hero-eyebrow::after { left: 50%; transform: translateX(-50%); }
  .hero-title { font-size: 2rem; }
  .hero-subtitle { font-size: 0.97rem; }
  .hero-bio { margin-left: auto; margin-right: auto; }
  .hero-stats { justify-content: center; gap: 28px; }
  .stat { align-items: center; }
  .stat-number { font-size: 1.7rem; }
  .hero-cta { justify-content: center; flex-direction: column; align-items: center; }

  .section { padding: 64px 0; }
  .section-title { font-size: 1.45rem; margin-bottom: 36px; }

  .snapshot-grid { grid-template-columns: 1fr; }
  .highlight-cards { grid-template-columns: 1fr 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }

  .timeline { padding-left: 36px; }
  .timeline-marker { left: -36px; width: 20px; height: 20px; }
  .timeline::before { left: 9px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.5rem; }
  .hero-stats { flex-direction: column; gap: 18px; }
  .project-header { flex-direction: column; }
  .highlight-cards { grid-template-columns: 1fr; }
  .modal { padding: 24px; }
}

/* ========================================
   降低動畫偏好設定
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}