/* =============================================
   Christine Jung Portfolio — style.css
   Clean, light, easy-to-read theme
   ============================================= */

/* 0. Font Face — Apercu Pro
   ============================================= */
@font-face {
  font-family: 'Apercu Pro';
  src: url('fonts/apercu_regular_pro.otf') format('opentype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Apercu Pro';
  src: url('fonts/apercu_medium_pro.otf') format('opentype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Apercu Pro';
  src: url('fonts/apercu_bold_pro.otf') format('opentype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* 1. Reset & Custom Properties
   ============================================= */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:           #fafafa;
  --surface:      #ffffff;
  --surface-hi:   #f0f0f0;
  --border:       rgba(0, 0, 0, 0.08);
  --border-hi:    rgba(0, 0, 0, 0.15);
  --text:         #1a1a1a;
  --text-muted:   #555;
  --text-faint:   #999;
  --accent:       #7c5cbf;
  --accent-light: #a78bfa;
  --accent-bg:    rgba(124, 92, 191, 0.06);
  --nav-h:        64px;
  --ease:         cubic-bezier(0.4, 0, 0.2, 1);
  --radius:       10px;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: 'Apercu Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

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

button {
  cursor: pointer;
  font-family: inherit;
}

/* 2. Utilities
   ============================================= */
.label {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

/* 3. Buttons
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  transition: all 0.2s var(--ease);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--border-hi);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-bg);
}

/* 4. Navigation
   ============================================= */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 5%;
  border-bottom: 1px solid transparent;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease);
}

#navbar.scrolled {
  background: rgba(250, 250, 250, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-color: var(--border);
}

.nav-logo {
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text);
  transition: color 0.2s;
}

.nav-logo:hover {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.2s var(--ease);
}

.nav-links a:hover {
  color: var(--text);
}

.nav-resume {
  padding: 0.4rem 1.1rem;
  border: 1px solid var(--border-hi) !important;
  border-radius: var(--radius);
  color: var(--text) !important;
  transition: border-color 0.2s, color 0.2s !important;
}

.nav-resume:hover {
  border-color: var(--accent) !important;
  color: var(--accent) !important;
}

/* Mobile toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
  width: 32px;
  height: 32px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.25s var(--ease);
  transform-origin: center;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* 5. Hero
   ============================================= */
#hero {
  min-height: min(100vh, 900px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--nav-h) + 2rem) 5% 3rem;
  position: relative;
  overflow: hidden;
}

/* ── Statement-style hero layout ── */
.hero-layout--statement {
  display: block;
  width: 100%;
  max-width: 1100px;
  position: relative;
}

.hero-content--wide {
  max-width: 100%;
  position: relative;
  z-index: 2;
}

#hero h1 {
  margin-bottom: 1.2rem;
}

/* Large statement text — like Joanne Huang */
.hero-statement {
  font-size: clamp(1.8rem, 3.8vw, 3rem);
  font-weight: 300;
  line-height: 1.45;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 2.75rem;
}

.hero-sub-statement {
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  font-weight: 400;
  line-height: 1.85;
  color: var(--text-muted);
  max-width: 680px;
  margin-bottom: 2.75rem;
}

/* ── Scattered decorative elements ── */
.hero-deco-scatter {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.deco-float {
  position: absolute;
}

.deco-float--1 {
  width: 80px; height: 80px;
  top: -10px; right: 5%;
  animation: float-1 8s ease-in-out infinite;
}
.deco-float--2 {
  width: 36px; height: 36px;
  top: 40%; right: 2%;
  animation: float-2 7s ease-in-out infinite;
}
.deco-float--3 {
  width: 22px; height: 22px;
  top: 15%; right: 12%;
  animation: twinkle 4s ease-in-out infinite;
}
.deco-float--4 {
  width: 44px; height: 44px;
  bottom: 20%; right: 8%;
  animation: float-3 9s ease-in-out infinite;
}
.deco-float--5 {
  width: 100px; height: 100px;
  top: 25%; right: -2%;
  animation: float-2 12s ease-in-out infinite;
}
.deco-float--6 {
  width: 18px; height: 18px;
  bottom: 30%; right: 15%;
  animation: twinkle 3.5s ease-in-out infinite 1s;
}
.deco-float--7 {
  width: 60px; height: 30px;
  bottom: 10%; right: 4%;
  animation: float-1 10s ease-in-out infinite;
}

@keyframes float-1 {
  0%, 100% { transform: translate(0, 0); }
  50%      { transform: translate(-8px, -14px); }
}
@keyframes float-2 {
  0%, 100% { transform: translate(0, 0); }
  50%      { transform: translate(10px, -10px); }
}
@keyframes float-3 {
  0%, 100% { transform: translate(0, 0); }
  50%      { transform: translate(-6px, 10px); }
}
@keyframes twinkle {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50%      { opacity: 0.9; transform: scale(1.3); }
}

/* ── Marquee strip ── */
.marquee-strip {
  overflow: hidden;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 0.8rem 0;
  background: var(--surface);
}

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

.marquee-track span {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0 1.2rem;
}

.marquee-dot {
  color: var(--accent) !important;
  padding: 0 !important;
}

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

.hero-eyebrow {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2rem;
}

#hero h1 {
  font-size: clamp(3.5rem, 10vw, 8.5rem);
  font-weight: 300;
  line-height: 0.92;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 2rem;
}

/* hero-desc kept for backward compat but hero-statement is primary */
.hero-desc {
  font-size: clamp(0.95rem, 1.4vw, 1.1rem);
  color: var(--text-muted);
  max-width: 500px;
  line-height: 1.8;
  margin-bottom: 2.75rem;
}

/* Hide old hero-desc when statement is used */
.hero-content--wide .hero-desc { display: none; }

.hero-actions {
  display: flex;
  gap: 0.875rem;
  flex-wrap: wrap;
}

/* ── Text annotations (highlights) ── */
.anno-highlight {
  position: relative;
  display: inline;
  background-image: linear-gradient(to right, rgba(124, 92, 191, 0.15), rgba(124, 92, 191, 0.15));
  background-position: 0 85%;
  background-size: 100% 35%;
  background-repeat: no-repeat;
}

.anno-highlight--pink {
  background-image: linear-gradient(to right, rgba(232, 160, 191, 0.22), rgba(232, 160, 191, 0.22));
}

/* Scroll indicator */
.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 5%;
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.hero-scroll-label {
  font-size: 0.67rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.hero-scroll-line {
  width: 48px;
  height: 1px;
  background: var(--border-hi);
  position: relative;
  overflow: hidden;
}

.hero-scroll-line::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  animation: scanline 2.2s ease-in-out infinite;
}

@keyframes scanline {
  0%   { transform: translateX(-100%); }
  50%  { transform: translateX(0); }
  100% { transform: translateX(100%); }
}

/* 6. Work Section
   ============================================= */
#work {
  padding: 100px 0 0;
  border-top: 1px solid var(--border);
}

.section-intro {
  padding: 0 5% 2.5rem;
}

.section-header-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.section-header-row h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 300;
  letter-spacing: -0.025em;
}

/* Filter tabs */
.filters {
  display: flex;
  gap: 0.4rem;
}

.filter-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.38rem 1.1rem;
  border-radius: 99px;
  font-size: 0.82rem;
  font-weight: 400;
  transition: all 0.2s var(--ease);
}

.filter-btn:hover {
  border-color: var(--border-hi);
  color: var(--text);
}

.filter-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-bg);
}

/* 7. Project Grid
   ============================================= */

/* Category section label above each grid */
.work-category {
  padding: 3rem 5% 0;
}

.work-category-label {
  font-size: 0.67rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 0.4rem;
  display: block;
}

.work-category-title {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-weight: 300;
  letter-spacing: -0.015em;
  color: var(--text-muted);
  margin-bottom: 0;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--border);
  border-left: 1px solid var(--border);
}

/* 3D Art row 2 and Tech Art use 3 columns */
.grid-3col,
#gridTechart {
  grid-template-columns: repeat(3, 1fr);
}

/* Remove top border on row 2 since it visually continues row 1 */
.grid-3col {
  border-top: none;
}

/* Hide categories when a filter is active */
.work-category.hidden { display: none; }
.project-grid.hidden { display: none; }

/* Experiments & Exploration subcategory */
.work-category-sub {
  padding: 1.5rem 5% 0;
  border-left: none;
  position: relative;
}

.work-category-sub::before {
  content: '';
  display: block;
  width: 2px;
  height: 100%;
  background: var(--accent);
  position: absolute;
  left: calc(5% - 12px);
  top: 0;
}

.work-category-sub .work-category-label {
  color: var(--accent);
  font-size: 0.62rem;
}

.work-category-sub .work-category-title {
  font-size: 1rem;
}

/* Experiments grid — 4 columns of smaller cards */
.project-grid-experiments {
  grid-template-columns: repeat(4, 1fr);
}

/* Smaller experiment cards — no featured */
.project-card-sm .card-img-wrap {
  aspect-ratio: 4 / 3;
}

.project-card-sm .card-title {
  font-size: 1rem;
}

.project-card-sm .card-desc {
  font-size: 0.82rem;
  -webkit-line-clamp: 3;
}

/* Cards */
.project-card {
  background: var(--surface);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.45s var(--ease), transform 0.45s var(--ease);
}

.project-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.project-card.hidden {
  display: none;
}

/* Featured card spans 2 columns */
.card-featured {
  grid-column: span 2;
}

/* Card link wrapper */
.card-link {
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: background 0.2s;
}

.card-link:hover {
  background: var(--accent-bg);
}

/* Card image */
.card-img-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--surface-hi);
}

.card-img-bg {
  position: absolute;
  inset: 0;
  transition: transform 0.55s var(--ease);
}

.card-link:hover .card-img-bg {
  transform: scale(1.04);
}

.card-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
  transition: transform 0.55s var(--ease);
}

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

/* Hover GIF — full-size crossfade with tint overlay */
.card-hover-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(124, 92, 191, 0.08) 0%, rgba(0, 0, 0, 0.15) 100%);
  z-index: 3;
  opacity: 0;
  transition: opacity 0.4s var(--ease);
  pointer-events: none;
}

.card-link:hover .card-hover-overlay {
  opacity: 1;
}

.card-img-hover {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 2;
  opacity: 0;
  transition: opacity 0.5s var(--ease);
  pointer-events: none;
}

.card-link:hover .card-img-hover {
  opacity: 1;
}

/* Gradient fallbacks — each project has a unique mood */
.flow-gradient       { background: linear-gradient(140deg, #e8edf5 0%, #c5d4e8 45%, #d1dff0 100%); }
.swamp-gradient      { background: linear-gradient(140deg, #e4f0dc 0%, #c2ddb0 55%, #d5e8c8 100%); }
.bvw-gradient        { background: linear-gradient(140deg, #ede4f5 0%, #d4c0e8 50%, #e8daf0 100%); }
.kitchen-gradient    { background: linear-gradient(140deg, #f5ede4 0%, #e8d5c0 45%, #f0e2d1 100%); }
.alley-gradient      { background: linear-gradient(140deg, #f0ece4 0%, #ddd4c2 50%, #e8e0d0 100%); }
.forest-gradient     { background: linear-gradient(140deg, #e0f0e4 0%, #b8ddc2 55%, #d0e8d5 100%); }
.flow-tech-gradient  { background: linear-gradient(140deg, #f5e4e0 0%, #e8c0b0 50%, #f0d5c8 100%); }
.arctic-gradient     { background: linear-gradient(140deg, #e0eaf5 0%, #c0d0e8 50%, #d0ddf0 100%); }
.props-gradient      { background: linear-gradient(140deg, #f0f0f0 0%, #e0e0e0 100%); }
.daisy-gradient      { background: linear-gradient(140deg, #e4f0e0 0%, #c2ddb0 50%, #d5e8c8 100%); }
.materials-gradient  { background: linear-gradient(140deg, #f0e8dc 0%, #e0d0b8 50%, #f0e5d5 100%); }

/* Badges */
.card-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 3;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.28rem 0.7rem;
  border-radius: 99px;
}

.badge-gold {
  background: var(--accent);
  color: #fff;
}

.badge-subtle {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.badge-grey {
  background: rgba(120, 120, 120, 0.75);
  color: rgba(255, 255, 255, 0.9);
}

/* Card body */
.card-body {
  flex: 1;
  padding: 1.4rem 1.5rem 1.6rem;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
}

.card-meta {
  margin-bottom: 0.6rem;
}

.card-cat {
  font-size: 0.67rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.card-desc {
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1rem;
  flex: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1rem;
}

.tag {
  font-size: 0.67rem;
  padding: 0.22rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 99px;
  color: var(--text-muted);
  background: var(--accent-bg);
}

.card-cta {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  transition: letter-spacing 0.2s;
}

.card-link:hover .card-cta {
  letter-spacing: 0.02em;
}

/* 8. About Section
   ============================================= */
#about {
  padding: 120px 5%;
  border-top: 1px solid var(--border);
}

.about-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  max-width: 1240px;
  margin: 0 auto;
  align-items: start;
}

.about-text h2 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 300;
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: var(--text);
  margin-bottom: 1.5rem;
}

.about-text p {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.85;
  margin-bottom: 1.1rem;
}

.about-links {
  display: flex;
  gap: 0.875rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

/* Skills */
.skills-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.25rem;
}

.skill-group h4 {
  font-size: 0.67rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.1rem;
}

.skill-group ul {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.skill-group li {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding-left: 1rem;
  position: relative;
}

.skill-group li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--text-faint);
  font-size: 0.7rem;
  top: 0.15em;
}

/* 9. Scroll Fade-In
   ============================================= */
.fade-in {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

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

/* 10. Footer
   ============================================= */
footer {
  border-top: 1px solid var(--border);
  padding: 3rem 5%;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
  max-width: 1240px;
  margin: 0 auto 1.5rem;
}

.footer-logo {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.3rem;
}

.footer-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-right {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-right a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

.footer-right a:hover {
  color: var(--accent);
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--text-faint);
  text-align: center;
  max-width: 1240px;
  margin: 0 auto;
}

/* 11. Responsive
   ============================================= */
@media (max-width: 1100px) {
  .hero-statement {
    font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  }
}

@media (max-width: 900px) {
  .hero-deco-scatter {
    display: none;
  }
  .grid-3col,
  #gridTechart {
    grid-template-columns: repeat(2, 1fr);
  }
  .project-grid-experiments {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .about-container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .skills-panel {
    grid-template-columns: repeat(3, 1fr);
  }

  .section-header-row {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .project-grid,
  .grid-3col,
  #gridTechart,
  .project-grid-experiments {
    grid-template-columns: 1fr;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: rgba(250, 250, 250, 0.97);
    backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem 5%;
    gap: 1.5rem;
    border-bottom: 1px solid var(--border);
    z-index: 199;
  }

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

  .nav-toggle {
    display: flex;
  }

  .skills-panel {
    grid-template-columns: 1fr 1fr;
  }

  #hero h1 {
    font-size: clamp(3rem, 14vw, 5rem);
  }

  .hero-scroll {
    display: none;
  }
}

@media (max-width: 400px) {
  .skills-panel {
    grid-template-columns: 1fr;
  }
}