/* ───────────────────────────────────────────────
   Pearl-style Portfolio — Miyoung Cho
   Fonts: Manrope (headings), Inter (body)
   Palette: White / Black / Gray (monochromatic)
─────────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@300;400;500;600;700;800;900&family=Inter:wght@300;400;500;600&display=swap');

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --black:      #0a0a0a;
  --white:      #ffffff;
  --gray-1:     #f7f7f7;
  --gray-2:     #eeeeee;
  --gray-3:     #cccccc;
  --gray-4:     #999999;
  --gray-5:     #555555;
  --font-head:  'Manrope', sans-serif;
  --font-body:  'Inter', sans-serif;
  --nav-h:      72px;
  --max-w:      1200px;
  --ease:       cubic-bezier(0.4, 0, 0.2, 1);
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--white);
  color: var(--black);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--white); }
::-webkit-scrollbar-thumb { background: var(--gray-3); border-radius: 2px; }

/* ══════════════════════════════════════════════
   NAVIGATION
══════════════════════════════════════════════ */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 40px;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  z-index: 100;
  transition: border-color 0.3s var(--ease);
}

.nav.scrolled { border-color: var(--gray-2); }

.nav-logo {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.3px;
  color: var(--black);
}

.nav-right {
  display: flex; align-items: center; gap: 36px;
}

.nav-link {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-5);
  letter-spacing: 0.2px;
  transition: color 0.2s;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute; bottom: -2px; left: 0; right: 0;
  height: 1px; background: var(--black);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.25s var(--ease);
}

.nav-link:hover { color: var(--black); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-link.active { color: var(--black); }
.nav-link.active::after { transform: scaleX(1); }

.nav-badge {
  display: flex; align-items: center; gap: 6px;
  font-size: 0.78rem; font-weight: 500;
  color: var(--gray-5);
  background: var(--gray-1);
  border: 1px solid var(--gray-2);
  border-radius: 100px;
  padding: 5px 12px;
}

.nav-badge .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #22c55e;
  animation: blink 2.5s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.3; }
}

/* ══════════════════════════════════════════════
   PAGE WRAPPER
══════════════════════════════════════════════ */
.page { padding-top: var(--nav-h); }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 40px;
}

/* ══════════════════════════════════════════════
   HERO — HOME
══════════════════════════════════════════════ */
.hero {
  min-height: calc(100vh - var(--nav-h));
  display: grid;
  grid-template-rows: 1fr auto;
  border-bottom: 1px solid var(--gray-2);
}

.hero-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: end;
  padding: 60px 40px 40px;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
}

.hero-label {
  font-size: 0.8rem; font-weight: 500;
  color: var(--gray-4); letter-spacing: 1.5px;
  text-transform: uppercase; margin-bottom: 16px;
}

.hero-title {
  font-family: var(--font-head);
  font-size: clamp(64px, 8vw, 128px);
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: -4px;
  color: var(--black);
}

.hero-right {
  display: flex; flex-direction: column;
  justify-content: flex-end; align-items: flex-end;
  padding-bottom: 8px;
  gap: 20px;
}

.hero-role {
  font-family: var(--font-head);
  font-size: clamp(14px, 1.4vw, 18px);
  font-weight: 600;
  color: var(--black);
  text-align: right;
}

.hero-desc {
  font-size: 0.95rem;
  color: var(--gray-5);
  line-height: 1.7;
  max-width: 320px;
  text-align: right;
}

.hero-meta {
  display: flex; justify-content: space-between; align-items: center;
  padding: 24px 40px;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  border-top: 1px solid var(--gray-2);
}

.hero-year {
  font-size: 0.8rem; color: var(--gray-4); font-weight: 500;
  letter-spacing: 0.5px;
}

.hero-scroll {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.8rem; color: var(--gray-4); font-weight: 500;
  letter-spacing: 0.5px; cursor: default;
}

.hero-scroll svg { animation: arrowBounce 1.8s ease-in-out infinite; }

@keyframes arrowBounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(4px); }
}

/* ══════════════════════════════════════════════
   MARQUEE / TICKER
══════════════════════════════════════════════ */
.marquee-wrap {
  overflow: hidden;
  border-bottom: 1px solid var(--gray-2);
  padding: 18px 0;
  background: var(--white);
}

.marquee-track {
  display: flex;
  white-space: nowrap;
  animation: marquee 30s linear infinite;
  gap: 0;
}

.marquee-track:hover { animation-play-state: paused; }

.marquee-item {
  display: inline-flex; align-items: center; gap: 28px;
  padding-right: 28px;
  font-family: var(--font-head);
  font-size: 0.8rem; font-weight: 700;
  letter-spacing: 2px; text-transform: uppercase;
  color: var(--gray-4);
  flex-shrink: 0;
}

.marquee-item .sep {
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--gray-3); flex-shrink: 0;
}

@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ══════════════════════════════════════════════
   SECTION COMMONS
══════════════════════════════════════════════ */
.section { padding: 80px 40px; }

.section-header {
  display: flex; justify-content: space-between;
  align-items: baseline; margin-bottom: 48px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--gray-2);
}

.section-title {
  font-family: var(--font-head);
  font-size: 0.75rem; font-weight: 700;
  letter-spacing: 2px; text-transform: uppercase;
  color: var(--gray-4);
}

.section-link {
  font-size: 0.8rem; font-weight: 500;
  color: var(--gray-4);
  display: flex; align-items: center; gap: 6px;
  transition: color 0.2s;
}

.section-link:hover { color: var(--black); }

.section-link svg { transition: transform 0.2s var(--ease); }
.section-link:hover svg { transform: translateX(3px); }

/* ══════════════════════════════════════════════
   PROJECT CARDS — GRID
══════════════════════════════════════════════ */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}

.project-card {
  display: block;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background: var(--gray-1);
}

.project-thumb {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}

.project-thumb-img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}

.project-card:hover .project-thumb-img { transform: scale(1.04); }

/* Placeholder thumb colors */
.thumb-1 { background: linear-gradient(145deg, #e8e0d5, #c5bdb4); }
.thumb-2 { background: linear-gradient(145deg, #d5d8e8, #b4b8c5); }
.thumb-3 { background: linear-gradient(145deg, #d8e5d5, #b4c5b8); }
.thumb-4 { background: linear-gradient(145deg, #e5d5d5, #c5b4b4); }
.thumb-5 { background: linear-gradient(145deg, #e5e8d5, #c5c8b4); }
.thumb-6 { background: linear-gradient(145deg, #d5e5e8, #b4c5c8); }

.project-thumb-placeholder {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; color: rgba(0,0,0,0.3);
  font-weight: 500; letter-spacing: 1px; text-transform: uppercase;
}

.project-overlay {
  position: absolute; inset: 0;
  background: rgba(10,10,10,0);
  transition: background 0.4s var(--ease);
  display: flex; align-items: center; justify-content: center;
}

.project-card:hover .project-overlay { background: rgba(10,10,10,0.12); }

.overlay-tag {
  background: var(--white);
  color: var(--black);
  font-size: 0.78rem; font-weight: 600;
  padding: 8px 18px; border-radius: 100px;
  opacity: 0; transform: translateY(8px);
  transition: opacity 0.3s, transform 0.3s;
}

.project-card:hover .overlay-tag { opacity: 1; transform: translateY(0); }

.project-info {
  padding: 20px 24px 24px;
  border-top: 1px solid var(--gray-2);
  display: flex; justify-content: space-between; align-items: flex-end;
}

.project-num {
  font-size: 0.7rem; color: var(--gray-4); font-weight: 500;
  margin-bottom: 6px; letter-spacing: 0.5px;
}

.project-name {
  font-family: var(--font-head);
  font-size: 1.1rem; font-weight: 700;
  letter-spacing: -0.3px; color: var(--black);
  margin-bottom: 4px;
}

.project-cat {
  font-size: 0.78rem; color: var(--gray-4); font-weight: 400;
}

.project-year {
  font-size: 0.78rem; color: var(--gray-4); font-weight: 400;
}

/* Full-width project card variant */
.project-card.full { grid-column: span 2; }
.project-card.full .project-thumb { aspect-ratio: 16/7; }

/* ══════════════════════════════════════════════
   WORK PAGE — LIST VIEW
══════════════════════════════════════════════ */
.work-list { border-top: 1px solid var(--gray-2); }

.work-item {
  display: grid;
  grid-template-columns: 60px 1fr auto auto;
  align-items: center; gap: 32px;
  padding: 24px 0;
  border-bottom: 1px solid var(--gray-2);
  cursor: pointer;
  transition: background 0.2s;
  position: relative;
}

.work-item:hover .work-item-title { text-decoration: underline; }

.work-item-num {
  font-size: 0.75rem; color: var(--gray-4); font-weight: 500;
}

.work-item-title {
  font-family: var(--font-head);
  font-size: 1.2rem; font-weight: 700;
  letter-spacing: -0.3px;
}

.work-item-cat {
  font-size: 0.8rem; color: var(--gray-4);
  background: var(--gray-1); border: 1px solid var(--gray-2);
  padding: 5px 12px; border-radius: 100px;
}

.work-item-year {
  font-size: 0.8rem; color: var(--gray-4); text-align: right;
  min-width: 50px;
}

/* ══════════════════════════════════════════════
   PAGE HERO (inner pages)
══════════════════════════════════════════════ */
.page-hero {
  padding: 80px 40px 60px;
  border-bottom: 1px solid var(--gray-2);
  max-width: var(--max-w);
  margin: 0 auto;
}

.page-hero-label {
  font-size: 0.75rem; font-weight: 600;
  color: var(--gray-4); letter-spacing: 2px;
  text-transform: uppercase; margin-bottom: 20px;
}

.page-hero-title {
  font-family: var(--font-head);
  font-size: clamp(48px, 6vw, 96px);
  font-weight: 800;
  line-height: 0.95; letter-spacing: -3px;
  color: var(--black);
  margin-bottom: 24px;
}

.page-hero-sub {
  font-size: 1.05rem; color: var(--gray-5);
  max-width: 520px; line-height: 1.7;
}

/* ══════════════════════════════════════════════
   ABOUT PAGE
══════════════════════════════════════════════ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 80px;
  padding: 80px 40px;
  max-width: var(--max-w); margin: 0 auto;
  border-bottom: 1px solid var(--gray-2);
}

.about-label {
  font-size: 0.75rem; font-weight: 700;
  color: var(--gray-4); letter-spacing: 2px;
  text-transform: uppercase; margin-bottom: 20px;
}

.about-heading {
  font-family: var(--font-head);
  font-size: clamp(28px, 3.5vw, 52px);
  font-weight: 800; line-height: 1.05;
  letter-spacing: -1.5px;
}

.about-text {
  font-size: 1.05rem; color: var(--gray-5);
  line-height: 1.8; margin-bottom: 24px;
}

.about-photo {
  aspect-ratio: 3/4;
  background: var(--gray-1);
  border: 1px solid var(--gray-2);
  border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; color: var(--gray-4); letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.info-item {
  padding: 20px 0;
  border-top: 1px solid var(--gray-2);
}

.info-key {
  font-size: 0.72rem; font-weight: 600;
  color: var(--gray-4); text-transform: uppercase;
  letter-spacing: 1.5px; margin-bottom: 6px;
}

.info-val {
  font-size: 0.9rem; color: var(--black); font-weight: 500;
}

/* Skills */
.skills-section {
  padding: 60px 40px 80px;
  max-width: var(--max-w); margin: 0 auto;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  margin-top: 32px;
}

.skill-item {
  padding: 28px 24px;
  background: var(--gray-1);
  transition: background 0.2s;
}

.skill-item:hover { background: var(--gray-2); }

.skill-cat {
  font-size: 0.7rem; font-weight: 700;
  color: var(--gray-4); letter-spacing: 2px;
  text-transform: uppercase; margin-bottom: 12px;
}

.skill-list {
  list-style: none;
  display: flex; flex-wrap: wrap; gap: 8px;
}

.skill-list li {
  font-size: 0.85rem; color: var(--black);
  font-weight: 500;
}

.skill-list li:not(:last-child)::after {
  content: ','; color: var(--gray-3);
}

/* Experience */
.exp-section {
  padding: 0 40px 80px;
  max-width: var(--max-w); margin: 0 auto;
}

.exp-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 40px;
  padding: 28px 0;
  border-top: 1px solid var(--gray-2);
}

.exp-period {
  font-size: 0.8rem; color: var(--gray-4); font-weight: 500;
  padding-top: 2px;
}

.exp-company {
  font-family: var(--font-head);
  font-size: 1rem; font-weight: 700; margin-bottom: 4px;
}

.exp-role { font-size: 0.875rem; color: var(--gray-5); }

/* ══════════════════════════════════════════════
   CONTACT PAGE
══════════════════════════════════════════════ */
.contact-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  padding: 80px 40px;
  max-width: var(--max-w); margin: 0 auto;
}

.contact-email-link {
  font-family: var(--font-head);
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 800;
  color: var(--black);
  letter-spacing: -1px;
  border-bottom: 2px solid var(--black);
  display: inline-block; margin-bottom: 32px;
  transition: opacity 0.2s;
}

.contact-email-link:hover { opacity: 0.5; }

.contact-info-title {
  font-size: 0.72rem; font-weight: 700;
  color: var(--gray-4); text-transform: uppercase;
  letter-spacing: 2px; margin-bottom: 16px;
}

.contact-socials {
  display: flex; flex-direction: column; gap: 10px;
}

.contact-social-link {
  font-size: 0.9rem; color: var(--gray-5); font-weight: 500;
  display: flex; align-items: center; gap: 8px;
  transition: color 0.2s;
}

.contact-social-link:hover { color: var(--black); }

.contact-avail {
  font-size: 0.9rem; color: var(--gray-5);
  line-height: 1.7; margin-bottom: 32px;
}

/* Form */
.contact-form { display: flex; flex-direction: column; gap: 16px; }

.form-group { display: flex; flex-direction: column; gap: 8px; }

.form-label {
  font-size: 0.75rem; font-weight: 600;
  color: var(--gray-4); text-transform: uppercase; letter-spacing: 1.5px;
}

.form-input,
.form-textarea {
  width: 100%;
  background: var(--gray-1);
  border: 1px solid var(--gray-2);
  border-radius: 4px;
  padding: 14px 16px;
  font-family: var(--font-body);
  font-size: 0.9rem; color: var(--black);
  outline: none;
  transition: border-color 0.2s;
  resize: vertical;
}

.form-input:focus,
.form-textarea:focus { border-color: var(--black); background: var(--white); }

.form-input::placeholder,
.form-textarea::placeholder { color: var(--gray-3); }

.form-btn {
  align-self: flex-start;
  background: var(--black); color: var(--white);
  border: 1px solid var(--black);
  border-radius: 100px;
  padding: 14px 32px;
  font-family: var(--font-body);
  font-size: 0.875rem; font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.form-btn:hover { background: var(--white); color: var(--black); }

/* ══════════════════════════════════════════════
   FOOTER
══════════════════════════════════════════════ */
.footer {
  padding: 32px 40px;
  border-top: 1px solid var(--gray-2);
  display: flex; justify-content: space-between; align-items: center;
  max-width: 100%; background: var(--white);
}

.footer-copy {
  font-size: 0.8rem; color: var(--gray-4); font-weight: 500;
}

.footer-links {
  display: flex; gap: 24px;
}

.footer-link {
  font-size: 0.8rem; color: var(--gray-4);
  font-weight: 500; transition: color 0.2s;
}

.footer-link:hover { color: var(--black); }

/* ══════════════════════════════════════════════
   FADE ANIMATIONS
══════════════════════════════════════════════ */
.fade-in {
  opacity: 0; transform: translateY(16px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.fade-in.visible { opacity: 1; transform: translateY(0); }

.stagger-1 { transition-delay: 0.05s; }
.stagger-2 { transition-delay: 0.12s; }
.stagger-3 { transition-delay: 0.20s; }
.stagger-4 { transition-delay: 0.28s; }

/* ══════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════ */
@media (max-width: 900px) {
  .nav { padding: 0 24px; }
  .hero-top { grid-template-columns: 1fr; padding: 40px 24px 32px; }
  .hero-right { align-items: flex-start; }
  .hero-desc { text-align: left; }
  .hero-role { text-align: left; }
  .hero-meta { padding: 20px 24px; }
  .projects-grid { grid-template-columns: 1fr; }
  .project-card.full { grid-column: span 1; }
  .project-card.full .project-thumb { aspect-ratio: 4/3; }
  .section { padding: 60px 24px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; padding: 60px 24px; }
  .skills-grid { grid-template-columns: 1fr; }
  .contact-split { grid-template-columns: 1fr; gap: 48px; padding: 60px 24px; }
  .page-hero { padding: 60px 24px 40px; }
  .exp-item { grid-template-columns: 1fr; gap: 8px; }
  .exp-section, .skills-section { padding: 0 24px 60px; }
  .footer { flex-direction: column; gap: 16px; text-align: center; padding: 24px; }
  .footer-links { justify-content: center; }
  .work-item { grid-template-columns: 40px 1fr auto; }
  .work-item-year { display: none; }
  .info-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .nav-badge { display: none; }
  .hero-title { letter-spacing: -2px; }
}