/* ============================================
   Design System — Light Theme
   Clean, editorial white aesthetic with depth
   ============================================ */
:root {
  /* ── Surface ── */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fb;
  --bg-card: #ffffff;
  --bg-card-hover: #f5f6f8;
  --bg-elevated: #ffffff;

  /* ── Text ── */
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-tertiary: #9ca3af;

  /* ── Accents ── */
  --accent-blue: #2563eb;
  --accent-blue-light: #3b82f6;
  --accent-purple: #7c3aed;
  --accent-cyan: #0891b2;
  --accent-green: #059669;
  --accent-orange: #d97706;
  --accent-pink: #db2777;
  --accent-red: #dc2626;

  /* ── Gradients ── */
  --gradient-primary: linear-gradient(135deg, #2563eb, #7c3aed);
  --gradient-secondary: linear-gradient(135deg, #0891b2, #2563eb);
  --gradient-warm: linear-gradient(135deg, #d97706, #dc2626);

  /* ── Borders ── */
  --border-subtle: rgba(0, 0, 0, 0.06);
  --border-medium: rgba(0, 0, 0, 0.1);
  --border-strong: rgba(0, 0, 0, 0.15);

  /* ── Shadows (crisp, layered for light theme) ── */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06), 0 4px 16px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.06), 0 8px 32px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 8px 32px rgba(0, 0, 0, 0.08), 0 20px 60px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 0 1px rgba(37, 99, 235, 0.08), 0 4px 20px rgba(37, 99, 235, 0.1);

  /* ── Radius ── */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* ── Fonts ── */
  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* ── Transitions ── */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-sans); background: var(--bg-primary); color: var(--text-primary); line-height: 1.6; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
::selection { background: rgba(37, 99, 235, 0.15); color: #1e40af; }

/* ── Cursor Glow (soft warm light) ── */
.cursor-glow { position: fixed; width: 500px; height: 500px; border-radius: 50%; background: radial-gradient(circle, rgba(37, 99, 235, 0.04) 0%, transparent 70%); pointer-events: none; z-index: 9999; transform: translate(-50%, -50%); transition: opacity 0.3s; opacity: 0; }
body:hover .cursor-glow { opacity: 1; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ============================================
   Floating Nav
   ============================================ */
.floating-nav { position: fixed; top: 20px; left: 50%; transform: translateX(-50%) translateY(-100px); z-index: 1000; opacity: 0; transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s; }
.floating-nav.visible { transform: translateX(-50%) translateY(0); opacity: 1; }
.nav-inner { display: flex; align-items: center; gap: 8px; padding: 8px 12px; background: rgba(255, 255, 255, 0.88); backdrop-filter: blur(20px) saturate(180%); -webkit-backdrop-filter: blur(20px) saturate(180%); border: 1px solid var(--border-medium); border-radius: var(--radius-full); box-shadow: var(--shadow-md); }
.nav-logo { font-weight: 800; font-size: 14px; padding: 6px 14px; background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; letter-spacing: 1px; }
.nav-links { display: flex; gap: 2px; }
.nav-links a { padding: 6px 14px; font-size: 13px; font-weight: 500; color: var(--text-secondary); border-radius: var(--radius-full); transition: var(--transition-fast); }
.nav-links a:hover, .nav-links a.active { color: var(--accent-blue); background: rgba(37, 99, 235, 0.06); }
.nav-github { display: flex; align-items: center; padding: 6px 10px; color: var(--text-secondary); border-radius: var(--radius-full); transition: var(--transition-fast); }
.nav-github:hover { color: var(--text-primary); background: rgba(0, 0, 0, 0.04); }

/* ============================================
   Hero
   ============================================ */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; overflow: hidden; background: linear-gradient(180deg, #f0f4ff 0%, #ffffff 60%); }
.hero-bg { position: absolute; inset: 0; overflow: hidden; }
.grid-bg { position: absolute; inset: 0; background-image: linear-gradient(rgba(37, 99, 235, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(37, 99, 235, 0.03) 1px, transparent 1px); background-size: 60px 60px; mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%); -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%); }
.gradient-orb { position: absolute; border-radius: 50%; filter: blur(100px); opacity: 0.18; animation: float 20s ease-in-out infinite; }
.orb-1 { width: 600px; height: 600px; background: var(--accent-blue); top: -10%; right: -5%; }
.orb-2 { width: 500px; height: 500px; background: var(--accent-purple); bottom: -10%; left: -5%; animation-delay: -7s; }
.orb-3 { width: 350px; height: 350px; background: var(--accent-cyan); top: 40%; left: 30%; animation-delay: -14s; }
@keyframes float { 0%,100%{transform:translate(0,0) scale(1)} 25%{transform:translate(30px,-30px) scale(1.05)} 50%{transform:translate(-20px,20px) scale(0.95)} 75%{transform:translate(20px,10px) scale(1.02)} }

.particle-field { position: absolute; inset: 0; }

.hero-content { position: relative; z-index: 1; text-align: center; padding: 0 24px; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; padding: 8px 20px; background: rgba(37, 99, 235, 0.06); border: 1px solid rgba(37, 99, 235, 0.12); border-radius: var(--radius-full); font-size: 13px; font-weight: 500; color: var(--accent-blue); margin-bottom: 32px; }
.badge-dot { width: 8px; height: 8px; background: var(--accent-green); border-radius: 50%; animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:0.5;transform:scale(0.8)} }

.hero-title { margin-bottom: 24px; }
.title-line { display: block; font-size: clamp(1rem, 2.5vw, 1.25rem); font-weight: 400; color: var(--text-secondary); margin-bottom: 8px; }
.title-name { display: block; font-size: clamp(3rem, 8vw, 5.5rem); font-weight: 900; background: linear-gradient(135deg, #1e293b 0%, #2563eb 50%, #7c3aed 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1.1; letter-spacing: -2px; }

.hero-subtitle { font-size: clamp(1rem, 2.5vw, 1.35rem); color: var(--text-secondary); margin-bottom: 48px; min-height: 2em; font-family: var(--font-mono); }
.typing-cursor { animation: blink 1s step-end infinite; color: var(--accent-blue); }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

.hero-stats { display: flex; align-items: center; justify-content: center; gap: 32px; margin-bottom: 48px; flex-wrap: wrap; }
.stat-item { text-align: center; position: relative; }
.stat-number { display: block; font-size: clamp(1.5rem, 4vw, 2.25rem); font-weight: 800; color: var(--text-primary); font-variant-numeric: tabular-nums; }
.stat-suffix { font-size: clamp(1.5rem, 4vw, 2.25rem); font-weight: 800; color: var(--text-primary); }
.stat-label { display: block; font-size: 12px; color: var(--text-tertiary); text-transform: uppercase; letter-spacing: 1px; margin-top: 4px; }
.stat-live { position: absolute; top: -8px; right: -30px; font-size: 9px; font-weight: 700; color: var(--accent-green); background: rgba(5, 150, 105, 0.08); padding: 2px 6px; border-radius: var(--radius-full); letter-spacing: 1px; animation: pulse 2s ease-in-out infinite; }
.stat-divider { width: 1px; height: 40px; background: var(--border-medium); }

.hero-actions { display: flex; align-items: center; justify-content: center; gap: 12px; flex-wrap: wrap; }

/* ── Buttons ── */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 24px; font-size: 14px; font-weight: 600; border-radius: var(--radius-full); transition: all var(--transition-base); cursor: pointer; border: none; font-family: var(--font-sans); }
.btn-primary { background: var(--gradient-primary); color: #fff; box-shadow: 0 2px 12px rgba(37, 99, 235, 0.25); }
.btn-primary:hover { box-shadow: 0 4px 20px rgba(37, 99, 235, 0.35); transform: translateY(-2px); }
.btn-secondary { background: var(--bg-primary); color: var(--text-primary); border: 1px solid var(--border-medium); }
.btn-secondary:hover { border-color: var(--border-strong); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--text-secondary); border: 1px solid var(--border-subtle); }
.btn-ghost:hover { color: var(--accent-blue); border-color: rgba(37, 99, 235, 0.2); background: rgba(37, 99, 235, 0.03); }
.btn-outline { display: inline-flex; align-items: center; gap: 8px; padding: 14px 28px; font-size: 14px; font-weight: 600; border-radius: var(--radius-full); border: 1px solid var(--border-medium); color: var(--text-secondary); background: var(--bg-primary); transition: all var(--transition-base); }
.btn-outline:hover { border-color: var(--accent-blue); color: var(--accent-blue); background: rgba(37, 99, 235, 0.03); transform: translateY(-2px); box-shadow: var(--shadow-md); }

.scroll-indicator { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--text-tertiary); font-size: 12px; }
.scroll-mouse { width: 24px; height: 38px; border: 2px solid var(--text-tertiary); border-radius: 12px; position: relative; }
.scroll-wheel { width: 3px; height: 8px; background: var(--text-tertiary); border-radius: 2px; position: absolute; top: 6px; left: 50%; transform: translateX(-50%); animation: scrollDown 2s ease-in-out infinite; }
@keyframes scrollDown { 0%{opacity:1;transform:translateX(-50%) translateY(0)} 100%{opacity:0;transform:translateX(-50%) translateY(12px)} }

/* ============================================
   Sections
   ============================================ */
.section { padding: 120px 0; position: relative; }
.section-dark { background: var(--bg-secondary); }
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag { display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: 3px; text-transform: uppercase; color: var(--accent-blue); margin-bottom: 16px; font-family: var(--font-mono); }
.section-title { font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; letter-spacing: -1px; margin-bottom: 16px; color: var(--text-primary); }
.section-desc { font-size: 1.1rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }
.subsection-title { font-size: 1.3rem; font-weight: 700; margin-bottom: 28px; text-align: center; color: var(--text-secondary); }

/* ============================================
   About
   ============================================ */
.about-grid { display: flex; flex-direction: column; gap: 24px; }
.about-card { background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg); padding: 32px; transition: all var(--transition-base); }
.about-card:hover { border-color: var(--border-medium); box-shadow: var(--shadow-md); }
.about-intro { display: flex; gap: 32px; align-items: flex-start; }
.about-avatar { position: relative; flex-shrink: 0; }
.about-avatar img { width: 120px; height: 120px; border-radius: var(--radius-lg); object-fit: cover; border: 2px solid var(--border-subtle); }
.avatar-ring { position: absolute; inset: -4px; border-radius: calc(var(--radius-lg) + 4px); background: var(--gradient-primary); z-index: -1; opacity: 0.6; }
.about-text h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 12px; }
.about-text p { color: var(--text-secondary); margin-bottom: 12px; line-height: 1.8; }
.about-text strong { color: var(--accent-blue); font-weight: 600; }
.about-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; }
.tag { padding: 6px 14px; background: rgba(37, 99, 235, 0.06); border: 1px solid rgba(37, 99, 235, 0.1); border-radius: var(--radius-full); font-size: 13px; color: var(--accent-blue); }
.about-cards-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.card-icon { font-size: 2rem; margin-bottom: 16px; }
.about-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 16px; }
.education-item { padding: 12px 0; border-bottom: 1px solid var(--border-subtle); }
.education-item:last-child { border-bottom: none; }
.edu-school { display: block; font-weight: 600; font-size: 0.95rem; }
.edu-degree { display: block; font-size: 0.85rem; color: var(--text-secondary); margin-top: 4px; }
.focus-list { list-style: none; }
.focus-list li { padding: 8px 0; padding-left: 20px; position: relative; color: var(--text-secondary); font-size: 0.95rem; }
.focus-list li::before { content: '\2192'; position: absolute; left: 0; color: var(--accent-blue); }

/* ============================================
   Skills
   ============================================ */
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.skill-category { background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg); padding: 24px; transition: all var(--transition-base); }
.skill-category:hover { border-color: rgba(37, 99, 235, 0.15); transform: translateY(-4px); box-shadow: var(--shadow-md); }
.skill-category-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.skill-icon { font-size: 1.5rem; }
.skill-category h3 { font-size: 0.95rem; font-weight: 700; }
.skill-items { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-chip { padding: 5px 12px; border-radius: var(--radius-full); font-size: 12px; font-weight: 500; border: 1px solid; }
.skill-expert { background: rgba(37, 99, 235, 0.06); border-color: rgba(37, 99, 235, 0.12); color: var(--accent-blue); }
.skill-proficient { background: rgba(124, 58, 237, 0.05); border-color: rgba(124, 58, 237, 0.1); color: var(--accent-purple); }
.skill-familiar { background: rgba(8, 145, 178, 0.05); border-color: rgba(8, 145, 178, 0.1); color: var(--accent-cyan); }
.skill-legend { display: flex; justify-content: center; gap: 24px; margin-top: 32px; }
.legend-item { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-secondary); }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; }
.legend-dot.expert { background: var(--accent-blue); }
.legend-dot.proficient { background: var(--accent-purple); }
.legend-dot.familiar { background: var(--accent-cyan); }

/* ============================================
   Projects — Featured
   ============================================ */
.project-featured { position: relative; background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-xl); padding: 48px; margin-bottom: 60px; overflow: hidden; box-shadow: var(--shadow-sm); }
.project-featured::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: var(--gradient-primary); }
.project-featured-badge { display: inline-block; padding: 6px 16px; background: rgba(217, 119, 6, 0.06); border: 1px solid rgba(217, 119, 6, 0.12); border-radius: var(--radius-full); font-size: 13px; font-weight: 600; color: var(--accent-orange); margin-bottom: 24px; }
.project-featured-content { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.project-featured-info h3 { font-size: 1.5rem; font-weight: 800; margin-bottom: 8px; line-height: 1.3; }
.project-date { font-size: 13px; color: var(--text-tertiary); font-family: var(--font-mono); margin-bottom: 16px; }
.project-desc { color: var(--text-secondary); line-height: 1.8; margin-bottom: 24px; }
.project-desc strong { color: var(--accent-blue); font-weight: 600; }
.project-highlights { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.highlight-item { text-align: center; padding: 16px 8px; background: rgba(37, 99, 235, 0.03); border: 1px solid rgba(37, 99, 235, 0.06); border-radius: var(--radius-md); }
.highlight-number { display: block; font-size: 1.5rem; font-weight: 800; color: var(--accent-blue); }
.highlight-label { display: block; font-size: 11px; color: var(--text-tertiary); margin-top: 4px; }
.project-tech { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.project-tech span { padding: 4px 10px; background: var(--bg-secondary); border: 1px solid var(--border-subtle); border-radius: var(--radius-full); font-size: 11px; color: var(--text-secondary); font-family: var(--font-mono); }
.project-links { display: flex; flex-wrap: wrap; gap: 8px; }
.project-link { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; background: var(--bg-secondary); border: 1px solid var(--border-subtle); border-radius: var(--radius-full); font-size: 12px; color: var(--text-secondary); transition: all var(--transition-fast); }
.project-link:hover { border-color: var(--accent-blue); color: var(--accent-blue); background: rgba(37, 99, 235, 0.03); }

/* ── Image Stack ── */
.project-image-stack { position: relative; height: 380px; perspective: 1000px; }
.stack-img { position: absolute; width: 85%; border-radius: var(--radius-md); box-shadow: var(--shadow-lg); border: 1px solid var(--border-subtle); transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1); cursor: pointer; }
.stack-img.stack-1 { top: 0; left: 0; z-index: 3; transform: rotate(-2deg); }
.stack-img.stack-2 { top: 30px; left: 40px; z-index: 2; transform: rotate(2deg); opacity: 0.85; }
.stack-img.stack-3 { top: 60px; left: 20px; z-index: 1; transform: rotate(-1deg); opacity: 0.7; }
.project-image-stack:hover .stack-1 { transform: rotate(0deg) translateX(-20px) translateY(-10px) scale(1.02); z-index: 3; }
.project-image-stack:hover .stack-2 { transform: rotate(0deg) translateX(20px) translateY(10px) scale(0.98); opacity: 1; }
.project-image-stack:hover .stack-3 { transform: rotate(0deg) translateX(0) translateY(50px) scale(0.96); opacity: 0.9; }

/* ============================================
   Projects — Showcase Cards
   ============================================ */
.projects-showcase { display: flex; flex-direction: column; gap: 32px; margin-bottom: 60px; }

.showcase-card { display: grid; grid-template-columns: 1fr 1fr; gap: 0; background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-xl); overflow: hidden; transition: all var(--transition-base); box-shadow: var(--shadow-sm); }
.showcase-card:hover { border-color: rgba(37, 99, 235, 0.12); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.showcase-card-reverse { direction: rtl; }
.showcase-card-reverse > * { direction: ltr; }

.showcase-image { position: relative; overflow: hidden; min-height: 280px; }
.showcase-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.showcase-card:hover .showcase-image img { transform: scale(1.05); }
.showcase-overlay { position: absolute; inset: 0; background: rgba(255, 255, 255, 0.85); backdrop-filter: blur(4px); display: flex; align-items: center; justify-content: center; opacity: 0; transition: opacity var(--transition-base); }
.showcase-card:hover .showcase-overlay { opacity: 1; }
.showcase-btn { padding: 10px 24px; background: var(--gradient-primary); color: #fff; border-radius: var(--radius-full); font-size: 14px; font-weight: 600; transition: transform var(--transition-fast); }
.showcase-btn:hover { transform: scale(1.05); }

.showcase-info { padding: 32px; display: flex; flex-direction: column; justify-content: center; }
.showcase-meta { display: flex; gap: 16px; margin-bottom: 12px; }
.showcase-stars { font-size: 13px; font-weight: 600; color: var(--accent-orange); }
.showcase-lang { font-size: 12px; color: var(--text-tertiary); font-family: var(--font-mono); }
.showcase-info h3 { font-size: 1.25rem; font-weight: 800; margin-bottom: 12px; }
.showcase-info p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }

/* ============================================
   Projects — Compact Grid
   ============================================ */
.projects-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

.project-card { background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg); padding: 24px; transition: all var(--transition-base); display: flex; flex-direction: column; position: relative; box-shadow: var(--shadow-sm); }
.project-card:hover { border-color: rgba(37, 99, 235, 0.12); transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.card-link-overlay { position: absolute; inset: 0; z-index: 1; }

.project-card-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; }
.project-card-icon { font-size: 1.75rem; }
.card-stars { font-size: 12px; font-weight: 600; color: var(--accent-orange); background: rgba(217, 119, 6, 0.06); padding: 3px 10px; border-radius: var(--radius-full); white-space: nowrap; }

.project-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
.project-card p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.6; flex: 1; margin-bottom: 12px; }

.projects-more { text-align: center; margin-top: 40px; }

/* ============================================
   Gallery
   ============================================ */
.gallery-grid { columns: 3; column-gap: 16px; }
.gallery-item { break-inside: avoid; margin-bottom: 16px; border-radius: var(--radius-md); overflow: hidden; position: relative; cursor: pointer; border: 1px solid var(--border-subtle); transition: all var(--transition-base); }
.gallery-item:hover { border-color: var(--accent-blue); transform: translateY(-4px); box-shadow: var(--shadow-glow); }
.gallery-item img { width: 100%; display: block; transition: transform 0.5s ease; }
.gallery-item:hover img { transform: scale(1.03); }
.gallery-caption { position: absolute; bottom: 0; left: 0; right: 0; padding: 12px 16px; background: linear-gradient(transparent, rgba(0,0,0,0.75)); font-size: 13px; font-weight: 500; color: #fff; opacity: 0; transition: opacity var(--transition-base); }
.gallery-item:hover .gallery-caption { opacity: 1; }
.gallery-wide { column-span: all; }

/* ── Lightbox ── */
.lightbox { position: fixed; inset: 0; z-index: 10000; background: rgba(255,255,255,0.95); display: flex; align-items: center; justify-content: center; opacity: 0; pointer-events: none; transition: opacity 0.3s; backdrop-filter: blur(16px); }
.lightbox.active { opacity: 1; pointer-events: auto; }
.lightbox img { max-width: 90vw; max-height: 90vh; border-radius: var(--radius-md); box-shadow: var(--shadow-xl); }
.lightbox-close { position: absolute; top: 24px; right: 24px; width: 40px; height: 40px; border-radius: 50%; background: var(--bg-secondary); border: 1px solid var(--border-medium); color: var(--text-primary); font-size: 20px; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: background var(--transition-fast); }
.lightbox-close:hover { background: var(--bg-card-hover); }

/* ============================================
   Achievements
   ============================================ */
.achievements-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.achievement-card { background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg); padding: 28px; text-align: center; transition: all var(--transition-base); position: relative; overflow: hidden; box-shadow: var(--shadow-sm); }
.achievement-card:hover { border-color: rgba(37, 99, 235, 0.12); transform: translateY(-4px); box-shadow: var(--shadow-md); }
.achievement-icon { font-size: 2.5rem; margin-bottom: 16px; }
.achievement-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.achievement-card p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 12px; }
.achievement-badge { display: inline-block; padding: 4px 12px; background: rgba(37, 99, 235, 0.06); border: 1px solid rgba(37, 99, 235, 0.1); border-radius: var(--radius-full); font-size: 11px; font-weight: 600; color: var(--accent-blue); }

/* ============================================
   Contact
   ============================================ */
.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 40px; }
.contact-card { background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg); padding: 28px; text-align: center; transition: all var(--transition-base); display: block; box-shadow: var(--shadow-sm); }
.contact-card:hover { border-color: rgba(37, 99, 235, 0.15); transform: translateY(-4px); box-shadow: var(--shadow-glow); }
.contact-icon { display: inline-flex; align-items: center; justify-content: center; width: 48px; height: 48px; background: rgba(37, 99, 235, 0.06); border-radius: var(--radius-md); color: var(--accent-blue); margin-bottom: 16px; }
.xiaohongshu-icon { background: rgba(219, 39, 119, 0.06); color: #db2777; }
.contact-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.contact-card p { font-size: 0.85rem; color: var(--text-secondary); }
.cta-card { background: linear-gradient(135deg, rgba(37, 99, 235, 0.04), rgba(124, 58, 237, 0.04)); border: 1px solid rgba(37, 99, 235, 0.08); border-radius: var(--radius-xl); padding: 48px; text-align: center; }
.cta-card h3 { font-size: 1.5rem; font-weight: 800; margin-bottom: 12px; }
.cta-card p { color: var(--text-secondary); margin-bottom: 24px; max-width: 500px; margin-left: auto; margin-right: auto; }
.cta-info { display: flex; justify-content: center; gap: 32px; flex-wrap: wrap; font-size: 0.95rem; color: var(--text-secondary); }

/* ============================================
   Footer
   ============================================ */
.footer { padding: 48px 0 32px; border-top: 1px solid var(--border-subtle); background: var(--bg-secondary); }
.footer-content { display: flex; justify-content: space-between; align-items: center; margin-bottom: 32px; }
.footer-logo { font-weight: 800; font-size: 1.25rem; background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.footer-brand p { font-size: 0.85rem; color: var(--text-tertiary); margin-top: 4px; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-size: 0.9rem; color: var(--text-secondary); transition: color var(--transition-fast); }
.footer-links a:hover { color: var(--accent-blue); }
.footer-bottom { text-align: center; padding-top: 24px; border-top: 1px solid var(--border-subtle); }
.footer-bottom p { font-size: 0.8rem; color: var(--text-tertiary); }

/* ============================================
   Animations
   ============================================ */
.animate-in { opacity: 0; transform: translateY(30px); animation: fadeInUp 0.8s ease forwards; }
.delay-1 { animation-delay: 0.15s; }
.delay-2 { animation-delay: 0.3s; }
.delay-3 { animation-delay: 0.45s; }
.delay-4 { animation-delay: 0.6s; }
.delay-5 { animation-delay: 0.75s; }
@keyframes fadeInUp { to { opacity: 1; transform: translateY(0); } }
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(3, 1fr); }
  .achievements-grid { grid-template-columns: repeat(2, 1fr); }
  .project-featured-content { grid-template-columns: 1fr; }
  .showcase-card { grid-template-columns: 1fr; }
  .showcase-card-reverse { direction: ltr; }
  .showcase-image { min-height: 220px; }
  .gallery-grid { columns: 2; }
}

@media (max-width: 768px) {
  .section { padding: 80px 0; }
  .nav-links { display: none; }
  .about-intro { flex-direction: column; align-items: center; text-align: center; }
  .about-tags { justify-content: center; }
  .about-cards-row { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .achievements-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { gap: 20px; }
  .stat-divider { display: none; }
  .stat-live { display: none; }
  .project-highlights { grid-template-columns: repeat(2, 1fr); }
  .project-featured { padding: 28px; }
  .project-image-stack { height: 260px; }
  .gallery-grid { columns: 2; }
  .footer-content { flex-direction: column; gap: 16px; text-align: center; }
  .cta-info { flex-direction: column; gap: 12px; }
}

@media (max-width: 480px) {
  .contact-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .gallery-grid { columns: 1; }
}

/* ============================================
   Showcase KPI & Repo Link
   ============================================ */
.showcase-kpis {
  display: flex;
  gap: 20px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.kpi-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 16px;
  background: rgba(37, 99, 235, 0.03);
  border: 1px solid rgba(37, 99, 235, 0.08);
  border-radius: var(--radius-md);
  min-width: 80px;
}
.kpi-num {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent-blue);
  white-space: nowrap;
}
.kpi-label {
  font-size: 11px;
  color: var(--text-tertiary);
  margin-top: 2px;
  white-space: nowrap;
}
.showcase-repo-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--accent-blue);
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}
.showcase-repo-link:hover { opacity: 1; }
.showcase-links-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 12px;
}

/* ============================================
   AIOps Pipeline Visual
   ============================================ */
.showcase-image-code {
  background: #f8f9fb;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  min-height: 300px;
}
.aiops-visual {
  width: 100%;
}
.pipeline-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.pipeline-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px 10px;
  border-radius: var(--radius-md);
  border: 1px solid;
  min-width: 90px;
  text-align: center;
}
.node-alert  { background: rgba(220, 38, 38, 0.04);  border-color: rgba(220, 38, 38, 0.12);  }
.node-rca    { background: rgba(217, 119, 6, 0.04); border-color: rgba(217, 119, 6, 0.12); }
.node-heal   { background: rgba(5, 150, 105, 0.04); border-color: rgba(5, 150, 105, 0.12); }
.node-approve{ background: rgba(37, 99, 235, 0.04); border-color: rgba(37, 99, 235, 0.12); }
.node-icon  { font-size: 1.4rem; margin-bottom: 4px; }
.node-label { font-size: 11px; font-weight: 700; color: var(--text-primary); }
.node-sub   { font-size: 10px; color: var(--text-tertiary); margin-top: 2px; }
.pipeline-arrow { font-size: 1.2rem; color: var(--text-tertiary); flex-shrink: 0; }
.aiops-metrics {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.metric {
  text-align: center;
  padding: 8px 14px;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}
.metric-val { display: block; font-size: 1rem; font-weight: 800; color: var(--accent-green); }
.metric-key { display: block; font-size: 10px; color: var(--text-tertiary); margin-top: 2px; }

/* ============================================
   Knowledge Hub Visual
   ============================================ */
.knowledge-visual {
  width: 100%;
}
.kb-flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.kb-step {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 360px;
  transition: border-color var(--transition-fast);
}
.kb-step:hover { border-color: var(--accent-blue); }
.kb-icon { font-size: 1.4rem; flex-shrink: 0; }
.kb-label { font-size: 12px; font-weight: 700; color: var(--text-primary); white-space: nowrap; }
.kb-desc  { font-size: 11px; color: var(--text-tertiary); }
.kb-arrow { font-size: 1rem; color: var(--accent-blue); opacity: 0.6; }

/* ============================================
   Meeting Agent Visual
   ============================================ */
.meeting-visual { width: 100%; padding: 4px; }
.meeting-title { text-align: center; font-size: 13px; font-weight: 700; color: var(--accent-blue); margin-bottom: 14px; letter-spacing: 0.5px; }
.meeting-pipeline { display: flex; flex-direction: column; gap: 6px; }
.mp-step { display: flex; align-items: center; gap: 10px; padding: 9px 14px; border-radius: var(--radius-md); border: 1px solid var(--border-subtle); background: var(--bg-primary); transition: border-color var(--transition-fast); }
.mp-step:hover { border-color: var(--accent-blue); }
.mp-step-1 { border-left: 3px solid var(--accent-blue); }
.mp-step-2 { border-left: 3px solid var(--accent-purple); }
.mp-step-3 { border-left: 3px solid var(--accent-green); }
.mp-step-4 { border-left: 3px solid var(--accent-orange); }
.mp-step-5 { border-left: 3px solid var(--accent-pink); }
.mp-num { font-size: 1.1rem; flex-shrink: 0; font-weight: 700; color: var(--text-secondary); }
.mp-content { flex: 1; }
.mp-name { font-size: 12px; font-weight: 700; color: var(--text-primary); }
.mp-desc { font-size: 11px; color: var(--text-tertiary); margin-top: 1px; }

/* ============================================
   Customer Service Visual
   ============================================ */
.cs-visual { width: 100%; }
.cs-title { text-align: center; font-size: 13px; font-weight: 700; color: var(--accent-blue); margin-bottom: 14px; }
.cs-arch { display: flex; flex-direction: column; gap: 10px; }
.cs-supervisor { display: flex; flex-direction: column; align-items: center; padding: 12px 16px; background: rgba(37, 99, 235, 0.04); border: 1px solid rgba(37, 99, 235, 0.1); border-radius: var(--radius-md); text-align: center; }
.cs-sup-icon { font-size: 1.4rem; }
.cs-sup-label { font-size: 13px; font-weight: 700; color: var(--accent-blue); }
.cs-sup-sub { font-size: 11px; color: var(--text-tertiary); }
.cs-agents-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.cs-agent { display: flex; flex-direction: column; align-items: center; gap: 3px; padding: 8px 4px; border-radius: var(--radius-sm); border: 1px solid var(--border-subtle); background: var(--bg-primary); font-size: 11px; text-align: center; }
.cs-agent span:first-child { font-size: 1.2rem; }
.cs-agent span:nth-child(2) { font-weight: 600; color: var(--text-primary); }
.cs-a-sub { color: var(--text-tertiary); font-size: 10px; }
.cs-a1 { border-top: 2px solid var(--accent-blue); }
.cs-a2 { border-top: 2px solid var(--accent-orange); }
.cs-a3 { border-top: 2px solid var(--accent-green); }
.cs-a4 { border-top: 2px solid var(--accent-purple); }
.cs-features { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; }
.cs-feat { padding: 3px 10px; background: rgba(124, 58, 237, 0.04); border: 1px solid rgba(124, 58, 237, 0.08); border-radius: var(--radius-full); font-size: 11px; color: var(--accent-purple); }

/* ============================================
   Ecommerce Visual
   ============================================ */
.ecom-visual { width: 100%; }
.ecom-title { text-align: center; font-size: 13px; font-weight: 700; color: var(--accent-orange); margin-bottom: 14px; }
.ecom-flow { display: flex; flex-direction: column; gap: 8px; align-items: center; }
.ecom-input { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.ecom-user { font-size: 13px; color: var(--text-secondary); }
.ecom-arrow-down { font-size: 14px; color: var(--text-tertiary); }
.ecom-supervisor-box { width: 100%; padding: 10px 16px; background: rgba(217, 119, 6, 0.04); border: 1px solid rgba(217, 119, 6, 0.1); border-radius: var(--radius-md); text-align: center; }
.ecom-sup { display: block; font-size: 13px; font-weight: 700; color: var(--accent-orange); }
.ecom-sup-sub { font-size: 11px; color: var(--text-tertiary); }
.ecom-parallel { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; width: 100%; }
.ecom-agent { display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 10px 6px; border-radius: var(--radius-md); border: 1px solid var(--border-subtle); background: var(--bg-primary); text-align: center; font-size: 11px; }
.ecom-agent span:first-child { font-size: 1.3rem; }
.ecom-agent span:nth-child(2) { font-weight: 700; color: var(--text-primary); }
.ecom-sub { font-size: 10px; color: var(--text-tertiary); line-height: 1.4; }
.ecom-rec  { border-top: 2px solid var(--accent-blue); }
.ecom-copy { border-top: 2px solid var(--accent-purple); }
.ecom-inv  { border-top: 2px solid var(--accent-green); }
.ecom-tag-row { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; }
.ecom-tag { padding: 3px 10px; background: rgba(217, 119, 6, 0.04); border: 1px solid rgba(217, 119, 6, 0.08); border-radius: var(--radius-full); font-size: 11px; color: var(--accent-orange); }

/* ============================================
   Comic Styles
   ============================================ */
.comic-styles-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; height: 100%; }
.comic-style-img { width: 100%; height: 100%; object-fit: cover; }
.comic-style-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.comic-style-tags span { padding: 4px 10px; background: rgba(219, 39, 119, 0.04); border: 1px solid rgba(219, 39, 119, 0.08); border-radius: var(--radius-full); font-size: 12px; color: var(--accent-pink); }

/* ============================================
   Travel Planner Visual
   ============================================ */
.travel-visual { width: 100%; }
.travel-title { text-align: center; font-size: 13px; font-weight: 700; color: var(--accent-cyan); margin-bottom: 14px; }
.travel-pipeline { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.tv-node { display: flex; flex-direction: column; align-items: center; gap: 3px; padding: 10px 16px; border-radius: var(--radius-md); border: 1px solid var(--border-subtle); background: var(--bg-primary); text-align: center; width: 100%; }
.tv-pref   { border-left: 3px solid var(--accent-cyan); }
.tv-budget { border-left: 3px solid var(--accent-orange); }
.tv-icon { font-size: 1.2rem; }
.tv-label { font-size: 12px; font-weight: 700; color: var(--text-primary); }
.tv-sub { font-size: 11px; color: var(--text-tertiary); }
.tv-arrow { font-size: 12px; color: var(--text-tertiary); text-align: center; }
.tv-parallel-label { font-size: 11px; color: var(--accent-blue); font-weight: 600; text-align: center; padding: 2px 0; }
.tv-parallel { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; width: 100%; }
.tv-flight { border-top: 2px solid var(--accent-blue); }
.tv-hotel  { border-top: 2px solid var(--accent-purple); }
.tv-act    { border-top: 2px solid var(--accent-green); }

/* ============================================
   Showcase Style Gallery (inline images)
   ============================================ */
.showcase-style-gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin-bottom: 16px;
}
.showcase-style-gallery img {
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  transition: transform var(--transition-fast);
}
.showcase-style-gallery img:hover {
  transform: scale(1.05);
}