/* ============================================
   暖米极简风 · 商婉婷作品集
   ============================================ */
:root {
  --primary: #C96F4A;
  --primary-dark: #B05A38;
  --primary-light: #F6E8E0;
  --text: #2D2A26;
  --text-secondary: #6E6A63;
  --text-tertiary: #A39C91;
  --bg: #FAF7F2;
  --bg-alt: #F3EDE4;
  --card: #FFFFFF;
  --border: #E7DFD3;
  --shadow-sm: 0 1px 2px rgba(45,42,38,.05);
  --shadow: 0 2px 10px rgba(45,42,38,.05), 0 6px 24px rgba(45,42,38,.04);
  --shadow-lg: 0 10px 32px rgba(45,42,38,.07), 0 20px 56px rgba(45,42,38,.05);
  --shadow-hover: 0 14px 36px rgba(201,111,74,.12), 0 6px 18px rgba(45,42,38,.06);
  --radius: 16px;
  --radius-sm: 12px;
  --transition: .35s cubic-bezier(.4,0,.2,1);
  --transition-fast: .2s cubic-bezier(.4,0,.2,1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
  --font-serif: 'Songti SC', 'Noto Serif SC', 'STSong', Georgia, serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  overflow-x: hidden;
  font-size: 16px;
  opacity: 0;
  animation: pageLoad .8s cubic-bezier(.4,0,.2,1) forwards;
}

@keyframes pageLoad {
  to { opacity: 1; }
}

a { color: inherit; text-decoration: none; transition: var(--transition-fast); }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4 {
  line-height: 1.25;
  font-weight: 600;
  letter-spacing: -.02em;
}

p {
  color: var(--text-secondary);
  font-weight: 400;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 2.75rem);
  text-align: center;
  margin-bottom: 4rem;
  font-weight: 600;
  letter-spacing: -.02em;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  border-radius: 3px;
  background: var(--primary);
  margin: 1rem auto 0;
}

/* ============================================
   Layout
   ============================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 8rem 0;
}

.section-alt {
  background: var(--bg-alt);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .875rem 2rem;
  border-radius: 100px;
  font-size: .95rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-family: var(--font);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,.12);
  transform: translateX(-100%);
  transition: transform .4s cubic-bezier(.4,0,.2,1);
}

.btn:hover::before {
  transform: translateX(0);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(201,111,74,.28);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(201,111,74,.35);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-full { width: 100%; justify-content: center; }

.btn-sm {
  padding: .6rem 1.25rem;
  font-size: .875rem;
  margin-top: 1.25rem;
}

.btn-download {
  margin-top: 1.5rem;
  display: inline-flex;
}

/* ============================================
   Navbar
   ============================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1.5rem 0;
  transition: var(--transition);
  background: rgba(250,247,242,0);
}

.navbar.scrolled {
  background: rgba(250,247,242,.82);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(45,42,38,.06);
  padding: 1rem 0;
  box-shadow: 0 1px 0 rgba(45,42,38,.04);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -.02em;
}

.nav-logo-dot {
  color: var(--primary);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  font-size: .9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -4px;
  width: 0; height: 2px;
  border-radius: 2px;
  background: var(--primary);
  transition: width var(--transition);
}

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

.nav-links a:hover::after, .nav-links a.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: var(--transition-fast);
}

/* ============================================
   Hero
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 10rem 2rem 6rem;
  max-width: 1200px;
  margin: 0 auto;
  gap: 6rem;
  position: relative;
}

.hero-content {
  flex: 1.1;
  animation: fadeInUp .8s cubic-bezier(.4,0,.2,1) .2s backwards;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-greeting {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: .75rem;
  letter-spacing: .06em;
}

.hero-name {
  font-family: var(--font-serif);
  font-size: clamp(3.2rem, 8vw, 5.2rem);
  font-weight: 700;
  letter-spacing: -.04em;
  color: var(--text);
  margin-bottom: 1rem;
  line-height: 1.1;
}

.hero-title {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 500;
  color: var(--primary-dark);
  margin-bottom: 2rem;
  min-height: 3rem;
  letter-spacing: -.02em;
}

.cursor {
  animation: blink 1.2s infinite;
  color: var(--primary);
  font-weight: 300;
}

@keyframes blink {
  0%,49% { opacity: 1; }
  50%,100% { opacity: 0; }
}

.hero-desc {
  font-size: 1.125rem;
  line-height: 1.8;
  margin-bottom: 2.5rem;
  max-width: 560px;
  color: var(--text-secondary);
}

.hero-desc strong {
  color: var(--text);
  font-weight: 600;
}

.hero-btns {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-visual {
  flex: 0.9;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeInUp .8s cubic-bezier(.4,0,.2,1) .4s backwards;
}

.avatar-wrapper {
  position: relative;
  width: 320px;
  height: 320px;
}

.avatar-ring {
  position: absolute;
  inset: -16px;
  border-radius: 50%;
  border: 1px dashed var(--primary);
  opacity: .35;
  animation: spin 40s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.avatar {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--primary-light) 0%, #F3E4D3 100%);
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.scroll-hint {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .75rem;
  color: var(--text-tertiary);
  font-size: .8rem;
  font-weight: 500;
  animation: float 3s ease-in-out infinite;
  letter-spacing: .05em;
}

.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 1.5px solid var(--text-tertiary);
  border-bottom: 1.5px solid var(--text-tertiary);
  transform: rotate(45deg);
}

@keyframes float {
  0%,100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

/* ============================================
   About
   ============================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: start;
}

.about-text p {
  margin-bottom: 1.5rem;
  font-size: 1.0625rem;
  line-height: 1.85;
}

.about-text strong {
  color: var(--text);
  font-weight: 600;
}

.skills-grid {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.skill-category h4 {
  font-size: .8125rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--primary-dark);
  margin-bottom: 1rem;
  font-weight: 600;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .625rem;
}

.skill-tags span {
  background: var(--card);
  color: var(--text-secondary);
  padding: .5rem 1rem;
  border-radius: 100px;
  font-size: .875rem;
  font-weight: 500;
  transition: var(--transition);
  border: 1px solid var(--border);
}

.skill-tags span:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* ============================================
   Timeline
   ============================================ */
.timeline {
  position: relative;
  max-width: 940px;
  margin: 0 auto;
  padding-left: 3rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 0;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(to bottom, var(--primary), transparent);
  opacity: .35;
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
  padding-left: 2rem;
}

.timeline-dot {
  position: absolute;
  left: -3.25rem;
  top: .5rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 1px var(--border);
  transition: var(--transition);
}

.timeline-item:hover .timeline-dot {
  transform: scale(1.25);
  box-shadow: 0 0 0 5px rgba(201,111,74,.15);
}

.section-alt .timeline-dot { border-color: var(--bg-alt); }

.timeline-content {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.timeline-content:hover {
  border-color: rgba(201,111,74,.28);
  box-shadow: var(--shadow-hover);
  transform: translateX(4px);
}

.timeline-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: .75rem;
  flex-wrap: wrap;
}

.timeline-header h3 {
  font-size: 1.3rem;
  font-weight: 600;
}

.school-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: .75rem;
  font-weight: 600;
  padding: .15rem .6rem;
  border-radius: 100px;
  vertical-align: middle;
  transform: translateY(-2px);
}

.timeline-badge {
  background: var(--primary-light);
  color: var(--primary-dark);
  padding: .25rem .875rem;
  border-radius: 100px;
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .02em;
}

.timeline-sub {
  color: var(--text-tertiary);
  font-size: .9rem;
  margin-bottom: 1rem;
  font-weight: 500;
  letter-spacing: .02em;
}

.timeline-summary {
  color: var(--text-secondary);
  font-size: .95rem;
  margin-bottom: 1.1rem;
  line-height: 1.75;
  padding: .875rem 1.125rem;
  background: var(--bg);
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.timeline-list {
  display: flex;
  flex-direction: column;
  gap: .625rem;
}

.timeline-list li {
  color: var(--text-secondary);
  font-size: .9375rem;
  padding-left: 1.5rem;
  position: relative;
  line-height: 1.75;
}

.timeline-list li strong {
  color: var(--text);
  font-weight: 600;
}

.timeline-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: .675rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

/* ============================================
   Data cards
   ============================================ */
.data-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .875rem;
  margin-top: 1.5rem;
}

.data-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.125rem;
  text-align: center;
  transition: var(--transition);
}

.data-card:hover {
  border-color: rgba(201,111,74,.3);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.data-num {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -.02em;
  line-height: 1.2;
}

.data-label {
  font-size: .8125rem;
  color: var(--text-tertiary);
  margin-top: .25rem;
  font-weight: 500;
}

/* ============================================
   Projects
   ============================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.project-card:hover {
  border-color: rgba(201,111,74,.22);
  box-shadow: var(--shadow-hover);
  transform: translateY(-6px);
}

.project-card-featured {
  grid-column: 1 / -1;
}

.video-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #2D2A26;
  overflow: hidden;
}

.video-container video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.project-body {
  padding: 2rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 1rem;
}

.project-tags span {
  background: var(--primary-light);
  color: var(--primary-dark);
  padding: .25rem .75rem;
  border-radius: 100px;
  font-size: .8125rem;
  font-weight: 500;
}

.project-body h3 {
  font-size: 1.25rem;
  margin-bottom: .875rem;
  font-weight: 600;
}

.project-body > p {
  font-size: .9375rem;
  line-height: 1.75;
}

.project-points {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.project-points li {
  color: var(--text-secondary);
  font-size: .9rem;
  padding-left: 1.25rem;
  position: relative;
  line-height: 1.7;
}

.project-points li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 600;
}

/* ============================================
   Contact
   ============================================ */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 5rem;
  align-items: start;
  max-width: 1000px;
  margin: 0 auto;
}

.contact-info > p {
  font-size: 1.0625rem;
  margin-bottom: 2.5rem;
  line-height: 1.85;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--text-secondary);
  font-size: .9375rem;
  transition: var(--transition-fast);
  padding: .5rem 0;
  cursor: default;
}

a.contact-item {
  cursor: pointer;
}

a.contact-item:hover {
  color: var(--primary);
  transform: translateX(4px);
}

.contact-item svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--primary);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.form-group label {
  font-size: .875rem;
  font-weight: 500;
  color: var(--text);
  letter-spacing: .01em;
}

.form-group input,
.form-group textarea {
  padding: .875rem 1.125rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .9375rem;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  transition: var(--transition);
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(201,111,74,.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-tertiary);
}

.form-hint {
  font-size: .8125rem;
  color: var(--text-tertiary);
  text-align: center;
  margin-top: -0.5rem;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 3rem 2rem;
  color: var(--text-tertiary);
  font-size: .875rem;
  font-weight: 500;
}

/* ============================================
   Hero 求职状态条
   ============================================ */
.hero-status {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .875rem;
  margin-top: 1.5rem;
  font-size: .875rem;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 600;
  padding: .4rem 1rem;
  border-radius: 100px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%,100% { opacity: 1; }
  50% { opacity: .35; }
}

.status-item {
  color: var(--text-secondary);
  font-weight: 500;
}

/* ============================================
   Methodology
   ============================================ */
.methodology-intro {
  text-align: center;
  max-width: 560px;
  margin: -2.5rem auto 3rem;
  font-size: 1.0625rem;
}

.method-loop {
  display: flex;
  align-items: stretch;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.method-step {
  flex: 1;
  min-width: 190px;
  max-width: 250px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.method-step:hover {
  border-color: rgba(201,111,74,.28);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.method-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
  font-size: .875rem;
  margin-bottom: 1rem;
}

.method-step h4 {
  font-size: 1.0625rem;
  margin-bottom: .5rem;
}

.method-step p {
  font-size: .875rem;
  line-height: 1.7;
}

.method-arrow {
  align-self: center;
  color: var(--primary);
  font-size: 1.5rem;
  font-weight: 300;
  flex-shrink: 0;
}

/* ============================================
   Honors
   ============================================ */
.honors-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.honor-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.honor-card:hover {
  border-color: rgba(201,111,74,.28);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.honor-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
}

.honor-icon svg { width: 26px; height: 26px; }

.honor-card h4 {
  font-size: 1.0625rem;
  margin-bottom: .5rem;
}

.honor-card p {
  font-size: .875rem;
  line-height: 1.6;
}

.honor-link {
  display: inline-block;
  margin-top: .875rem;
  font-size: .8125rem;
  font-weight: 500;
  color: var(--primary);
  border-bottom: 1px solid rgba(201,111,74,.35);
  padding-bottom: 2px;
  transition: var(--transition);
}

.honor-link:hover {
  color: var(--primary-dark);
  border-color: var(--primary-dark);
}

/* ============================================
   Project actions
   ============================================ */
.project-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.25rem;
}

.project-actions .btn { margin-top: 0; }

/* ============================================
   Case Study Modal
   ============================================ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  visibility: hidden;
  opacity: 0;
  transition: opacity .3s ease, visibility .3s ease;
}

.modal.open {
  visibility: visible;
  opacity: 1;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(45,42,38,.45);
  backdrop-filter: blur(4px);
}

.modal-panel {
  position: relative;
  background: var(--bg);
  border-radius: var(--radius);
  width: 100%;
  max-width: 820px;
  max-height: 88vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px);
  transition: transform .3s ease;
}

.modal.open .modal-panel {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  z-index: 3;
  transition: var(--transition-fast);
}

.modal-close:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: rotate(90deg);
}

.modal-content {
  padding: 2.5rem;
}

.case-header {
  margin-bottom: 2rem;
  padding-right: 3rem;
}

.case-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: .75rem;
}

.case-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 1rem;
}

.case-tags span {
  background: var(--primary-light);
  color: var(--primary-dark);
  padding: .25rem .75rem;
  border-radius: 100px;
  font-size: .8125rem;
  font-weight: 500;
}

.case-overview {
  font-size: .95rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.case-section {
  margin-top: 1.75rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border);
}

.case-section h4 {
  font-size: 1.0625rem;
  color: var(--primary-dark);
  margin-bottom: .75rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}

.case-section h4::before {
  content: '';
  width: 3px;
  height: 16px;
  border-radius: 2px;
  background: var(--primary);
}

.case-section p,
.case-section li {
  font-size: .9375rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.case-section ul {
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.case-section li {
  padding-left: 1.25rem;
  position: relative;
}

.case-section li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

.case-images {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1.75rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border);
}

.case-images .case-img {
  width: 100%;
  aspect-ratio: 16/11;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  cursor: zoom-in;
  transition: var(--transition);
}

.case-images .case-img:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.case-note {
  margin-top: 1.5rem;
  padding: .875rem 1.125rem;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  font-size: .875rem;
  color: var(--primary-dark);
  line-height: 1.7;
}

/* ============================================
   Timeline collapse
   ============================================ */
.timeline-list.collapsed li:nth-child(n+4) {
  display: none;
}

.timeline-more-btn {
  margin-top: .875rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: .375rem .875rem;
  font-size: .8125rem;
  color: var(--primary-dark);
  cursor: pointer;
  font-family: var(--font);
  font-weight: 500;
  transition: var(--transition-fast);
}

.timeline-more-btn:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

/* ============================================
   Scroll progress
   ============================================ */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), #E8A87C);
  border-radius: 0 3px 3px 0;
  z-index: 3000;
}

/* ============================================
   Mouse glow
   ============================================ */
.mouse-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201,111,74,.10) 0%, rgba(201,111,74,.05) 40%, transparent 70%);
  transform: translate(-50%, -50%) scale(0);
  opacity: 0;
  pointer-events: none;
  z-index: 1;
  transition: opacity .5s ease;
  will-change: transform;
}

.mouse-glow.active {
  opacity: 1;
}

@media (hover: none) {
  .mouse-glow { display: none; }
}

/* ============================================
   Back to top
   ============================================ */
.back-top {
  position: fixed;
  right: 2rem;
  bottom: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--primary);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity .3s ease, transform .3s ease, box-shadow .3s ease;
  z-index: 1500;
}

.back-top.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-top:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.back-top svg { width: 20px; height: 20px; }

@media (max-width: 640px) {
  .back-top { right: 1.25rem; bottom: 1.25rem; width: 44px; height: 44px; }
}

/* ============================================
   Lightbox
   ============================================ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  visibility: hidden;
  opacity: 0;
  transition: opacity .3s ease, visibility .3s ease;
}

.lightbox.open {
  visibility: visible;
  opacity: 1;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(45,42,38,.82);
  backdrop-filter: blur(6px);
}

.lightbox-img {
  position: relative;
  max-width: 92%;
  max-height: 88vh;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  object-fit: contain;
}

.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,.15);
  color: #fff;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  z-index: 2;
  transition: var(--transition-fast);
}

.lightbox-close:hover {
  background: rgba(255,255,255,.3);
  transform: rotate(90deg);
}

.case-img { cursor: zoom-in; }

/* ============================================
   Print
   ============================================ */
@media print {
  .navbar, .scroll-hint, .hero-status, .contact-form,
  .case-btn, .project-actions, .modal, .footer,
  .methodology, #honors, .timeline-more-btn,
  .scroll-progress, .back-top, .mouse-glow, .lightbox {
    display: none !important;
  }
  body { opacity: 1 !important; }
  .hero { min-height: auto; padding: 2rem 1rem; }
  .section { padding: 1.5rem 0; }
  .fade-in { opacity: 1 !important; transform: none !important; }
  .video-container { break-inside: avoid; }
}

/* ============================================
   Animations
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .7s cubic-bezier(.4,0,.2,1),
              transform .7s cubic-bezier(.4,0,.2,1);
}

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

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 900px) {
  .hero {
    flex-direction: column;
    text-align: center;
    padding-top: 8rem;
    gap: 4rem;
  }
  .hero-desc { max-width: 100%; }
  .hero-btns { justify-content: center; }
  .hero-status { justify-content: center; }
  .hero-visual { order: -1; }
  .avatar-wrapper { width: 220px; height: 220px; }
  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
  .contact-wrapper { grid-template-columns: 1fr; gap: 3rem; }
  .section { padding: 5rem 0; }
  .data-cards { grid-template-columns: repeat(2, 1fr); }
  .honors-grid { grid-template-columns: repeat(2, 1fr); }
  .methodology-intro { margin-top: -2.5rem; }
}

@media (max-width: 640px) {
  .container { padding: 0 1.5rem; }
  .nav-links {
    display: none;
    position: fixed;
    top: 70px; left: 0; right: 0;
    background: rgba(250,247,242,.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 2rem 1.5rem;
    gap: 1.5rem;
    border-top: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .projects-grid { grid-template-columns: 1fr; }
  .section { padding: 4rem 0; }
  .hero { padding-top: 7rem; }
  .data-cards { grid-template-columns: repeat(2, 1fr); }
  .honors-grid { grid-template-columns: 1fr; }
  .method-arrow { display: none; }
  .method-loop { gap: 1.5rem; }
  .modal { padding: 1rem; }
  .modal-content { padding: 1.5rem; }
  .case-title { font-size: 1.25rem; }
  .case-images { grid-template-columns: 1fr; }
}