/* ════════════════════════════════════════════════════════════════
   PORTFOLIO - ZONAL COLOR JOURNEY (NARRATIVE V5)
   ════════════════════════════════════════════════════════════════ */

:root {
  /* Default (Intro State) */
  --p-bg-top: #e3f2fd;
  --p-bg-bottom: #ffffff;
  --p-text: #0a0b1e;
  --p-text-muted: #546e7a;
  --p-accent: #0288d1;
  --p-glass-bg: rgba(255, 255, 255, 0.7);
  --p-glass-border: rgba(0, 0, 0, 0.08);
  --p-radius: 16px;
  --p-font-tech: 'JetBrains Mono', monospace;
  --p-font-display: 'Inter', sans-serif;
  --p-font-quote: 'Playfair Display', serif; /* Elegant serif for humanities aspect */
  --p-transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Theme Definitions ── */
body.theme-intro {
  --p-bg-top: #e1f5fe;
  --p-bg-bottom: #ffffff;
  --p-text: #1a1a1a;
  --p-text-muted: #546e7a;
  --p-accent: #0288d1;
  --p-glass-bg: rgba(255, 255, 255, 0.6);
  --p-glass-border: rgba(0, 0, 0, 0.1);
}

body.theme-projects {
  --p-bg-top: #050505;
  --p-bg-bottom: #050505;
  --p-text: #ffffff;
  --p-text-muted: #888888;
  --p-accent: #00ff41; /* Matrix Green */
  --p-glass-bg: rgba(255, 255, 255, 0.04);
  --p-glass-border: rgba(0, 255, 65, 0.2);
}

body.theme-ctf {
  --p-bg-top: #120000;
  --p-bg-bottom: #120000;
  --p-text: #ffffff;
  --p-text-muted: #a0a0a0;
  --p-accent: #ff3131; /* Alert Red */
  --p-glass-bg: rgba(255, 255, 255, 0.03);
  --p-glass-border: rgba(255, 49, 49, 0.25);
}

/* ── Global Setup ── */
.portfolio-body {
  background: linear-gradient(to bottom, var(--p-bg-top) 0%, var(--p-bg-bottom) 1200px, var(--p-bg-bottom) 100%);
  color: var(--p-text);
  font-family: 'Inter', system-ui, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  overflow-x: hidden;
  transition: var(--p-transition);
  -webkit-font-smoothing: antialiased;
}

/* ── Navigation ── */
.about-nav {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  background: var(--p-glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  padding: 10px 24px;
  border-radius: 100px;
  border: 1px solid var(--p-glass-border);
  display: flex;
  align-items: center;
  gap: 32px; /* Final polished gap */
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  transition: var(--p-transition);
}

.about-nav-link {
  text-decoration: none;
  color: var(--p-text);
  font-size: 10px;
  font-weight: 900;
  font-family: var(--p-font-tech);
  text-transform: uppercase;
  letter-spacing: 0.22em; /* Final polished 자간 */
  padding: 6px 14px; /* Final polished padding */
  opacity: 0.4;
  transition: var(--p-transition);
  border-radius: 100px;
}
.about-nav-link:hover, .about-nav-link.active { 
  opacity: 1; 
  color: var(--p-accent);
}

/* Language Toggle */
.nav-lang-toggle {
  display: flex;
  background: rgba(0, 0, 0, 0.03);
  padding: 2px;
  border-radius: 100px;
  border: 1px solid var(--p-glass-border);
}
.nav-lang-btn {
  background: none;
  border: none;
  color: var(--p-text);
  font-size: 10px;
  font-weight: 800;
  font-family: var(--p-font-tech);
  padding: 6px 14px;
  border-radius: 100px;
  cursor: pointer;
  opacity: 0.4;
}
.nav-lang-btn.active {
  background: var(--p-accent);
  color: #fff;
  opacity: 1;
}

/* ── Hero Section ── */
.p-hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 24px;
}
.hero-container {
  max-width: 1000px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.p-hero-status {
  position: absolute;
  top: 130px; /* Moved down from 100px for more breathing room */
  left: 0;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: var(--p-font-tech);
  font-size: 9px;
  font-weight: 700;
  color: var(--p-accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  opacity: 0.5;
  white-space: nowrap;
  pointer-events: none;
  z-index: 5;
}
.p-hero-status-inner {
  padding: 4px 12px;
  background: rgba(var(--p-accent), 0.03);
  border: 1px solid rgba(var(--p-accent), 0.1);
  border-radius: 4px;
}

.p-hero-title {
  font-size: clamp(60px, 10vw, 100px);
  font-weight: 950;
  line-height: 0.9;
  letter-spacing: -0.05em;
  margin: 54px 0 32px 0; /* Slightly increased to maintain balance */
  color: var(--p-text);
  width: 100%;
}

.p-hero-desc {
  font-size: 20px;
  color: var(--p-text-muted);
  max-width: 750px;
  margin: 0 auto 40px;
  line-height: 1.5;
}

/* ── Quote Block ── */
.p-quote-block {
  font-family: var(--p-font-quote);
  font-style: italic;
  font-size: 22px;
  color: var(--p-accent);
  max-width: 750px;
  margin: 40px auto;
  position: relative;
  padding: 0 40px;
  opacity: 0.9;
}
.p-quote-block::before { content: '“'; position: absolute; left: 0; top: -10px; font-size: 50px; opacity: 0.2; }
.p-quote-block::after { content: '”'; position: absolute; right: 0; bottom: -30px; font-size: 50px; opacity: 0.2; }

/* System Dashboard Metric Grid */
.p-hero-metrics {
  display: flex;
  justify-content: center;
  gap: 60px;
  width: 100%;
  border-top: 1px solid var(--p-glass-border);
  padding-top: 40px;
  margin-top: 40px;
}
.metric-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.metric-icon { font-size: 24px !important; color: var(--p-accent); }
.metric-txt { font-family: var(--p-font-tech); font-size: 10px; font-weight: 800; text-transform: uppercase; color: var(--p-text-muted); }

/* ── Refined Feature Rows (Story Layout) ── */
.p-feature-row {
  display: flex;
  align-items: center;
  gap: 80px;
  padding: 120px 0;
  max-width: 1400px;
  margin: 0 auto;
}
.p-feature-row:nth-child(even) { flex-direction: row-reverse; }

.p-feature-text { flex: 1.2; }
.p-feature-image-container { 
  flex: 1.8;
  position: relative;
  aspect-ratio: 16/9;
  border-radius: var(--p-radius);
  overflow: hidden;
  box-shadow: 0 30px 100px rgba(0,0,0,0.3);
  border: 1px solid var(--p-glass-border);
}
.p-feature-img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s ease; }
.p-feature-row:hover .p-feature-img { transform: scale(1.03); }

.feature-title { font-size: 52px; font-weight: 900; margin-bottom: 24px; letter-spacing: -0.03em; }
.feature-desc { font-size: 18px; color: var(--p-text-muted); line-height: 1.7; }

/* ── Animations & Transitions ── */
.reveal { 
  opacity: 0; 
  transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1), transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform, opacity;
}

/* Initial States */
.reveal.rise-up { transform: translateY(60px); }
.reveal.slide-in-right { transform: translateX(80px); }
.reveal.slide-in-left { transform: translateX(-80px); }

/* Active States */
.reveal.active { 
  opacity: 1 !important; 
  transform: translate(0, 0) !important; 
}

/* ── Staggered Reveal Logic ── */
.staggered-reveal .reveal { transition-delay: calc(var(--stagger-idx, 0) * 0.15s); }

.ctf-timeline .ctf-row:nth-child(1) { --stagger-idx: 1; }
.ctf-timeline .ctf-row:nth-child(2) { --stagger-idx: 2; }
.ctf-timeline .ctf-row:nth-child(3) { --stagger-idx: 3; }
.ctf-timeline .ctf-row:nth-child(4) { --stagger-idx: 4; }
.ctf-timeline .ctf-row:nth-child(5) { --stagger-idx: 5; }
.ctf-timeline .ctf-row:nth-child(6) { --stagger-idx: 6; }
.ctf-timeline .ctf-row:nth-child(7) { --stagger-idx: 7; }
.ctf-timeline .ctf-row:nth-child(8) { --stagger-idx: 8; }

/* ── CTF Gallery & Modal ── */
.ctf-gallery-btn {
  background: none;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  font-size: 13px;
  font-weight: 700;
  color: var(--p-accent);
  cursor: pointer;
  padding: 0;
  font-family: inherit;
  transition: var(--p-transition);
}
.ctf-gallery-btn:hover { opacity: 0.7; transform: translateX(3px); }

.p-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 20000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.p-modal.active { opacity: 1; pointer-events: auto; }

.p-modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(15px);
}

.p-modal-content {
  position: relative;
  width: 90%;
  max-width: 1100px;
  max-height: 85vh;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--p-glass-border);
  border-radius: 32px;
  padding: 60px;
  overflow-y: auto;
  transform: scale(0.95);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 50px 100px rgba(0,0,0,0.8);
}
.p-modal-content::-webkit-scrollbar { width: 4px; }
.p-modal-content::-webkit-scrollbar-thumb { background: var(--p-accent); border-radius: 10px; }
.p-modal.active .p-modal-content { transform: scale(1); }

.p-modal-close {
  position: absolute;
  top: 32px;
  right: 32px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--p-glass-border);
  color: #fff;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--p-transition);
  z-index: 10;
}
.p-modal-close:hover { background: var(--p-accent); border-color: var(--p-accent); transform: rotate(90deg); }

.p-modal-header { margin-bottom: 40px; border-bottom: 1px solid var(--p-glass-border); padding-bottom: 24px; }

.p-modal-gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}
.gallery-img-wrapper {
  width: 100%;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--p-glass-border);
  box-shadow: 0 30px 60px rgba(0,0,0,0.4);
  background: #000;
}
.gallery-img-wrapper img { width: 100%; display: block; filter: brightness(0.9); transition: filter 0.3s ease; }
.gallery-img-wrapper:hover img { filter: brightness(1); }
/* ── Bento Grid ── */
.p-section {
  padding: 120px 24px;
}
.p-bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: minmax(100px, auto);
  gap: 24px;
  max-width: 1250px;
  margin: 0 auto;
}

.p-card {
  background: var(--p-glass-bg);
  backdrop-filter: blur(20px);
  border-radius: var(--p-radius);
  border: 1px solid var(--p-glass-border);
  padding: 40px;
  transition: var(--p-transition);
  display: flex;
  flex-direction: column;
}

.box-intro { grid-column: span 8; grid-row: span 4; }
.box-stats { grid-column: span 4; grid-row: span 4; }
.box-skills-off { grid-column: span 4; grid-row: span 3; }
.box-skills-ai { grid-column: span 8; grid-row: span 3; }

.p-card:hover { transform: translateY(-5px); border-color: var(--p-accent); }

.card-title {
  font-size: 13px;
  font-weight: 850;
  text-transform: uppercase;
  color: var(--p-text-muted);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: 0.05em;
}

.card-icon { color: var(--p-accent); font-size: 20px !important; }

/* Impact Stats */
.metric-feed { 
  display: flex; 
  flex-direction: column; 
  justify-content: space-around;
  height: 100%;
  gap: 20px;
}
.metric-item { display: flex; flex-direction: column; }
.metric-val { font-size: 36px; font-weight: 950; color: var(--p-text); line-height: 1; }
.metric-label { font-size: 10px; font-weight: 800; color: var(--p-text-muted); text-transform: uppercase; letter-spacing: 0.1em; margin-top: 4px; }

/* ── Layout Fixes ── */
.p-section {
  padding: 120px 24px;
  max-width: 1300px;
  margin: 0 auto;
}

/* ── CTF Terminal Style ── */
.ctf-timeline { display: flex; flex-direction: column; gap: 12px; }
.ctf-row {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  align-items: center;
  padding: 24px 32px;
  background: var(--p-glass-bg);
  border: 1px solid var(--p-glass-border);
  border-radius: 8px;
  font-family: var(--p-font-tech);
  transition: var(--p-transition);
}
.ctf-row:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--p-accent);
}
.ctf-rank-big { font-size: 32px; font-weight: 700; color: var(--p-accent); }
.ctf-meta { font-size: 11px; color: var(--p-text-muted); }

/* ── Experience Timeline ── */
.experience-timeline {
  display: flex;
  flex-direction: column;
  gap: 48px;
  max-width: 1000px;
  margin: 64px auto;
  position: relative;
  padding-left: 20px;
}
.experience-timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--p-accent) 0%, var(--p-glass-border) 100%);
}
.exp-item {
  position: relative;
  padding-left: 40px;
}
.exp-item::before {
  content: '';
  position: absolute;
  left: -4.5px;
  top: 12px; /* Adjusted for larger header */
  width: 10px;
  height: 10px;
  background: var(--p-accent);
  border-radius: 50%;
  box-shadow: 0 0 15px var(--p-accent);
  z-index: 1;
}
.exp-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  margin-bottom: 24px;
}
.exp-title-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.exp-company { 
  font-size: 26px; 
  font-weight: 950; 
  color: var(--p-text); 
  letter-spacing: -0.02em; 
  line-height: 1.1;
}
.exp-role { 
  font-size: 16px; 
  font-weight: 700; 
  color: var(--p-accent); 
  opacity: 0.95;
}

/* Meta Row aligned to the right */
.exp-meta-row {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  flex-shrink: 0;
}
.exp-pill {
  font-family: var(--p-font-tech);
  font-size: 10px;
  font-weight: 800;
  padding: 5px 10px;
  background: rgba(var(--p-accent), 0.05);
  border: 1px solid rgba(var(--p-accent), 0.15);
  border-radius: 100px;
  color: var(--p-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 6px;
}
.exp-pill span.icon { font-size: 14px; color: var(--p-accent); }
.exp-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.exp-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  color: var(--p-text-muted);
}
.exp-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--p-accent);
  font-weight: 900;
}

/* ── Academic Foundation (Premium) ── */
.academic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 32px;
  max-width: 1200px;
  margin: 64px auto;
}
.edu-card {
  background: var(--p-glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--p-glass-border);
  border-radius: var(--p-radius);
  padding: 48px;
  transition: var(--p-transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.edu-card::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 120px; height: 120px;
  background: radial-gradient(circle at top right, var(--p-accent), transparent 70%);
  opacity: 0.1;
}
.edu-card:hover { 
  border-color: var(--p-accent); 
  transform: translateY(-8px); 
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
  background: rgba(255, 255, 255, 0.85);
}
.edu-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
  gap: 20px;
}
.edu-title-group { flex: 1; }
.edu-school { font-size: 26px; font-weight: 950; color: var(--p-text); margin-bottom: 4px; letter-spacing: -0.02em; line-height: 1.1; }
.edu-degree { font-size: 16px; font-weight: 700; color: var(--p-accent); margin-bottom: 0; opacity: 0.9; }
.edu-logo {
  width: 54px;
  height: 54px;
  object-fit: contain;
  filter: grayscale(0.2) contrast(1.1);
  transition: var(--p-transition);
  opacity: 0.9;
}
.edu-card:hover .edu-logo { filter: grayscale(0); opacity: 1; transform: scale(1.1); }

/* Top Section for Alignment */
.edu-card-top {
  min-height: 150px; /* Restored flexible floor */
  display: flex;
  flex-direction: column;
}

/* Meta Pills */
.edu-meta-pills {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
}
.edu-pill {
  font-family: var(--p-font-tech);
  font-size: 10px;
  font-weight: 800;
  padding: 6px 12px;
  background: rgba(var(--p-accent), 0.08);
  border: 1px solid rgba(var(--p-accent), 0.2);
  border-radius: 100px;
  color: var(--p-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Iconic Highlights */
.edu-highlights {
  margin-top: auto; /* Restored auto margin to ensure bottom alignment of divider */
  border-top: 1px solid var(--p-glass-border);
  padding-top: 24px;
}
.edu-highlights-label {
  font-family: var(--p-font-tech);
  font-size: 10px;
  font-weight: 900;
  color: var(--p-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 20px;
  display: block;
}
.edu-icon-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.edu-icon-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  font-size: 14px;
  color: var(--p-text-muted);
  line-height: 1.45;
  font-weight: 500;
}
.edu-icon-item span.icon { 
  color: var(--p-accent); 
  font-size: 18px !important; 
  flex-shrink: 0; 
  margin-top: -1px;
}
.edu-honors { margin-top: auto; }
.edu-honors h4 { font-size: 10px; text-transform: uppercase; color: var(--p-accent); margin-bottom: 16px; letter-spacing: 0.1em; font-weight: 900; }
.honor-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.honor-list li { font-size: 13px; color: var(--p-text-muted); position: relative; padding-left: 20px; line-height: 1.5; font-weight: 500; }
.honor-list li::before { content: '→'; position: absolute; left: 0; color: var(--p-accent); font-weight: 900; }

/* ── Certifications (Simple & Sleek) ── */
.cert-section { margin-top: 120px; }
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  max-width: 1200px;
  margin: 48px auto;
}
.cert-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--p-glass-border);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  transition: var(--p-transition);
}
.theme-intro .cert-card { background: rgba(0, 0, 0, 0.02); }
.cert-card:hover { border-color: var(--p-accent); background: rgba(255,255,255,0.05); transform: scale(1.02); }
.cert-icon { 
  flex-shrink: 0;
  width: 44px; height: 44px; 
  background: rgba(var(--p-accent), 0.1); 
  border-radius: 10px; 
  display: flex; align-items: center; justify-content: center;
  color: var(--p-accent);
}
.cert-info h4 { font-size: 14px; font-weight: 850; margin-bottom: 4px; color: var(--p-text); line-height: 1.3; }
.cert-issuer { font-size: 11px; font-weight: 700; color: var(--p-text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.cert-date { font-family: var(--p-font-tech); font-size: 10px; color: var(--p-accent); margin-top: 8px; font-weight: 800; }

/* ── Confidential Projects ── */
.confidential-grid { 
  display: grid; 
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); 
  gap: 24px; 
}
.conf-card {
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--p-glass-border);
  padding: 40px;
  border-radius: var(--p-radius);
  transition: var(--p-transition);
}
.conf-card:hover {
  background: rgba(255,255,255,0.05);
  border-color: var(--p-accent);
}
.conf-icon { color: var(--p-accent); margin-bottom: 24px; }

@keyframes agentic-pulse {
  0% { box-shadow: 0 0 0 0 rgba(2, 136, 209, 0.4); }
  70% { box-shadow: 0 0 0 10px rgba(2, 136, 209, 0); }
  100% { box-shadow: 0 0 0 0 rgba(2, 136, 209, 0); }
}

.p-hero-status {
  animation: agentic-pulse 2s infinite;
}

@media (max-width: 1000px) {
  .p-bento-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: auto;
    gap: 16px;
  }
  .box-intro, .box-stats, .box-skills-off, .box-skills-ai {
    grid-column: span 1;
    grid-row: auto;
  }
  .p-hero-title { font-size: 52px; }
  .p-hero-metrics { flex-direction: column; gap: 32px; }
}

/* Utils */
@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.5; }
  50% { transform: scale(1); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.5; }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {transform: translateY(0) translateX(-50%);}
  40% {transform: translateY(-10px) translateX(-50%);}
  60% {transform: translateY(-5px) translateX(-50%);}
}