/* =====================================================
   Academic Portfolio — Ariful Islam Anik
   ===================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=DM+Serif+Display:ital@0;1&display=swap');

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

:root {
  --navy:      #1a2c47;
  --accent:    #2563a8;
  --accent-lt: #4a8fc1;
  --teal:      #0e9488;
  --teal-lt:   #14b8aa;
  --amber:     #d97706;
  --text:      #1f2937;
  --muted:     #6b7280;
  --border:    #e2e8f0;
  --bg:        #f1f5f9;
  --white:     #ffffff;
  --card-bg:   #ffffff;
  --tag-bg:    #eff6ff;
  --tag-fg:    #2563a8;
  --font-body: 'Inter', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --font-ui:   'Inter', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --font-display: 'DM Serif Display', Georgia, serif;
  --max-w:     980px;
  --radius:    6px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-lt); text-decoration: underline; }
img { max-width: 100%; display: block; }

/* ── Navigation ─────────────────────────────────── */
.site-header {
  background: var(--navy);
  border-bottom: 3px solid var(--accent);
  position: sticky; top: 0; z-index: 100;
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto; padding: 0 1.5rem;
  display: flex; align-items: center;
  justify-content: space-between; height: 56px;
}
.nav-brand {
  font-family: var(--font-ui);
  font-size: 1rem; font-weight: 600;
  color: #fff; letter-spacing: 0.02em;
}
.nav-links { list-style: none; display: flex; gap: 0.25rem; }
.nav-links a {
  font-family: var(--font-ui); font-size: 0.85rem;
  color: rgba(255,255,255,0.82);
  padding: 0.35rem 0.8rem; border-radius: var(--radius);
  transition: background 0.15s, color 0.15s;
  letter-spacing: 0.01em;
}
.nav-links a:hover { background: rgba(255,255,255,0.1); color: #fff; text-decoration: none; }
.nav-links a.active { background: var(--teal); color: #fff; text-decoration: none; }

/* ── Page wrapper ───────────────────────────────── */
.page-wrap {
  max-width: var(--max-w);
  margin: 0 auto; padding: 2.5rem 1.5rem 5rem;
}

/* ── Section titles ─────────────────────────────── */
.section-title {
  font-family: var(--font-ui);
  font-size: 1rem; font-weight: 700;
  color: var(--navy); margin-bottom: 1.1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border);
  display: flex; align-items: center; gap: 0.5rem;
}
.section-title::before {
  content: ''; display: inline-block;
  width: 4px; height: 1rem; background: var(--teal);
  border-radius: 3px; flex-shrink: 0;
}
section { margin-bottom: 3rem; }

/* ── Hero / About ───────────────────────────────── */
.hero {
  display: flex; gap: 2.8rem;
  align-items: flex-start;
  background: linear-gradient(135deg, #f0f7ff 0%, #e8f2fa 60%, #edf6f5 100%);
  margin: -2.5rem -1.5rem 3rem;
  padding: 3.5rem 2.5rem 3rem;
  border-bottom: 3px solid var(--teal);
  position: relative; overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle, rgba(30,60,100,0.055) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute; right: -60px; top: -60px;
  width: 340px; height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(14,148,136,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero-photo {
  flex-shrink: 0; width: 150px; height: 150px;
  border-radius: 50%; object-fit: cover;
  border: 3px solid var(--white);
  box-shadow: 0 0 0 5px rgba(14,148,136,0.2), 0 10px 32px rgba(0,0,0,0.12);
  position: relative; z-index: 1;
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
  image-rendering: -webkit-optimize-contrast;
}
.hero-photo-placeholder {
  flex-shrink: 0; width: 150px; height: 150px;
  border-radius: 50%; border: 3px solid var(--white);
  background: var(--tag-bg);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-ui); font-size: 2.5rem;
  font-weight: 700; color: var(--accent);
  position: relative; z-index: 1;
}
.hero-body { position: relative; z-index: 1; }
.hero-body h1 {
  font-family: var(--font-display); font-size: 2.3rem;
  font-weight: 400; color: var(--navy);
  line-height: 1.15; margin-bottom: 0.4rem;
  letter-spacing: -0.01em;
}
.hero-body .title-line {
  font-family: var(--font-ui); font-size: 0.88rem; font-weight: 600;
  color: var(--teal); margin-bottom: 0.2rem; letter-spacing: 0.01em;
}
.hero-body .affil-line {
  font-family: var(--font-ui); font-size: 0.85rem;
  color: var(--muted); margin-bottom: 1.4rem;
}
.hero-body .affil-line a { color: var(--accent); }
.hero-body .affil-line a:hover { color: var(--navy); }
.hero-bio { font-size: 0.92rem; line-height: 1.8; color: var(--text); margin-bottom: 1rem; }
.hero-links { display: flex; flex-wrap: wrap; gap: 0.6rem; }

/* ── Hero actions + socials ─────────────────────── */
.hero-actions { display: flex; align-items: center; gap: 1.2rem; flex-wrap: wrap; }
.hero-socials {
  display: flex; align-items: center; gap: 0.3rem;
  padding-left: 1rem;
  border-left: 1px solid var(--border);
}
.hero-social-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 50%;
  color: var(--muted); border: 1px solid var(--border);
  background: var(--white); transition: all 0.15s;
  text-decoration: none; flex-shrink: 0;
}
.hero-social-icon svg { width: 14px; height: 14px; fill: currentColor; }
.hero-social-icon:hover {
  color: var(--teal); border-color: var(--teal);
  background: #f0fafa; text-decoration: none;
}

/* ── Buttons ────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-family: var(--font-ui); font-size: 0.8rem;
  font-weight: 600; letter-spacing: 0.02em;
  padding: 0.5rem 1.1rem; border-radius: var(--radius);
  transition: all 0.18s ease;
  cursor: pointer; text-decoration: none;
}
.btn-primary { background: var(--teal); color: #fff; border: 1px solid var(--teal); }
.btn-primary:hover { background: #0b7a6e; border-color: #0b7a6e; color: #fff; text-decoration: none; box-shadow: 0 4px 14px rgba(14,148,136,0.3); }
.btn-outline { background: transparent; color: var(--navy); border: 1px solid var(--border); }
.btn-outline:hover { background: var(--navy); color: #fff; border-color: var(--navy); text-decoration: none; }

/* ── Research Interests ─────────────────────────── */
.interest-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.2rem; }
.interest-card {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: 8px; padding: 1.6rem 1.5rem 1.4rem;
  border-left: 4px solid var(--accent);
  transition: box-shadow 0.2s, transform 0.2s;
  position: relative;
}
.interest-card:hover {
  box-shadow: 0 6px 24px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}
.interest-card:nth-child(2) { border-left-color: var(--teal); }
.interest-card:nth-child(3) { border-left-color: var(--amber); }
.interest-card h3 {
  font-family: var(--font-ui); font-size: 0.95rem;
  font-weight: 700; color: var(--navy); margin-bottom: 0.55rem;
}
.interest-card:nth-child(2) h3 { color: var(--teal); }
.interest-card:nth-child(3) h3 { color: var(--amber); }
.interest-card p { font-size: 0.86rem; color: var(--muted); line-height: 1.65; }

/* ── News ───────────────────────────────────────── */
.news-list { list-style: none; }
.news-list li {
  display: flex; gap: 1.2rem;
  padding: 0.8rem 0; border-bottom: 1px solid var(--border);
  font-size: 0.9rem; line-height: 1.65;
}
.news-list li:last-child { border-bottom: none; }
.news-date {
  font-family: var(--font-ui); font-size: 0.75rem; font-weight: 600;
  color: var(--teal); white-space: nowrap;
  padding-top: 0.08rem; min-width: 80px;
}

/* ── CV ─────────────────────────────────────────── */
.cv-box {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.5rem 1.8rem;
  display: flex; align-items: center;
  justify-content: space-between; gap: 1rem; flex-wrap: wrap;
}
.cv-box p { font-size: 0.92rem; color: var(--muted); max-width: 560px; }

/* ── Contact ────────────────────────────────────── */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.contact-info dt {
  font-family: var(--font-ui); font-size: 0.75rem;
  font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--muted); margin-top: 1rem;
}
.contact-info dt:first-child { margin-top: 0; }
.contact-info dd { font-size: 0.92rem; color: var(--text); margin-left: 0; }
.contact-link-item {
  display: flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-ui); font-size: 0.88rem;
  color: var(--accent); padding: 0.5rem 0.8rem;
  border: 1px solid var(--border); border-radius: var(--radius);
  transition: background 0.12s; margin-top: 0.5rem;
}
.contact-link-item:first-child { margin-top: 0; }
.contact-link-item:hover { background: #f0fafa; border-color: var(--teal); color: var(--teal); text-decoration: none; }
.contact-link-item:hover .contact-icon { fill: var(--teal); }
.contact-icon { width: 18px; height: 18px; fill: var(--accent); flex-shrink: 0; }

/* ── Footer ─────────────────────────────────────── */
.site-footer {
  background: #0a1624;
  border-top: 1px solid rgba(14,148,136,0.3);
  color: rgba(255,255,255,0.45);
  text-align: center; padding: 1.8rem 1rem;
  font-family: var(--font-ui); font-size: 0.78rem;
}
.site-footer a { color: rgba(255,255,255,0.6); }
.site-footer a:hover { color: var(--teal-lt); text-decoration: none; }

/* ── Page header ────────────────────────────────── */
.page-header {
  padding: 2rem 0 1.5rem; border-bottom: 1px solid var(--border); margin-bottom: 2.5rem;
}
.page-header h1 {
  font-family: var(--font-ui); font-size: 1.6rem;
  font-weight: 700; color: var(--navy); margin-bottom: 0.3rem;
}
.page-header p { font-size: 0.92rem; color: var(--muted); }

/* ── Tag pills ──────────────────────────────────── */
.tag {
  font-family: var(--font-ui); font-size: 0.72rem; font-weight: 600;
  background: var(--tag-bg); color: var(--tag-fg);
  padding: 0.18rem 0.55rem; border-radius: 20px;
}

/* ==============================================
   PROJECTS GRID (projects.html)
   ============================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}


.proj-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  text-decoration: none;
  display: flex; flex-direction: column;
  transition: box-shadow 0.22s, transform 0.22s;
  cursor: pointer;
}
.proj-card:hover {
  box-shadow: 0 12px 40px rgba(0,0,0,0.14);
  transform: translateY(-4px);
  text-decoration: none;
}

.proj-strip {
  padding: 1.6rem 1.5rem 1.3rem;
  position: relative;
  overflow: hidden;
}
.proj-strip.c1 { background: #e8eef6; border-top: 4px solid #2563a8; }
.proj-strip.c2 { background: #e6f0f4; border-top: 4px solid #0e7490; }
.proj-strip.c3 { background: #e8f2f0; border-top: 4px solid #0f766e; }
.proj-strip.c4 { background: #eceef6; border-top: 4px solid #3730a3; }

.proj-num {
  font-family: var(--font-ui);
  font-size: 0.68rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.75rem;
  display: block;
}
.proj-strip h2 {
  font-family: var(--font-ui); font-size: 1rem;
  font-weight: 700; color: var(--navy);
  line-height: 1.35; margin-bottom: 0.5rem;
}
.proj-tagline {
  font-size: 0.83rem; color: var(--muted);
  line-height: 1.5;
}

.proj-body {
  padding: 1rem 1.5rem 1.3rem;
  flex: 1; display: flex;
  flex-direction: column; justify-content: space-between;
}

.proj-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.2rem; }
.proj-tags .tag {
  background: #f0f4f9; color: #4a6080;
  border: none;
  font-size: 0.69rem;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.proj-tags .tag:hover { background: #dce6f2; color: var(--navy); }
.proj-tags .tag.tag-active { background: var(--accent); color: #fff; }
.proj-card.card-hidden { display: none; }

.proj-cta {
  font-family: var(--font-ui); font-size: 0.8rem;
  font-weight: 700; color: var(--accent);
  display: inline-flex; align-items: center; gap: 0.3rem;
  margin-top: auto;
}
.proj-card:hover .proj-cta { color: var(--navy); }

/* ==============================================
   PROJECT DETAIL PAGE
   ============================================== */
.proj-hero {
  padding: 3.5rem 2.8rem 3rem;
  margin: -2.5rem -1.5rem 3rem;
  position: relative; overflow: hidden;
}
.proj-hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 26px 26px;
  pointer-events: none;
}
.proj-hero.c1 { background: linear-gradient(135deg, #0f1f35 0%, #1a2c47 60%, #1e3555 100%); }
.proj-hero.c2 { background: linear-gradient(135deg, #102030 0%, #1d3d5c 60%, #22496b 100%); }
.proj-hero.c3 { background: linear-gradient(135deg, #0e1e30 0%, #1e3a50 60%, #21475f 100%); }
.proj-hero.c4 { background: linear-gradient(135deg, #0a1624 0%, #16293e 60%, #1c3450 100%); }

.proj-hero-meta {
  display: flex; align-items: center;
  gap: 0.6rem; margin-bottom: 1.2rem; flex-wrap: wrap;
}
.proj-hero-meta .proj-venue { font-size: 0.72rem; }

.proj-hero h1 {
  font-family: var(--font-display); font-size: 2rem;
  font-weight: 400; font-style: italic; color: #fff;
  line-height: 1.25; margin-bottom: 0.7rem; max-width: 760px;
}
.proj-hero .proj-tagline {
  font-size: 1rem; color: rgba(255,255,255,0.80);
  line-height: 1.65; font-style: normal;
}

/* Back link */
.back-link {
  display: inline-flex; align-items: center; gap: 0.35rem;
  font-family: var(--font-ui); font-size: 0.8rem;
  color: var(--muted); padding-bottom: 2.5rem; display: block;
}
.back-link:hover { color: var(--accent); text-decoration: none; }

/* ── Project detail hero stats row ─────────────── */
.hero-stats {
  display: flex; gap: 2rem; flex-wrap: wrap;
  margin-top: 2rem; padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.15);
}
.hero-stat { text-align: left; }
.hero-stat-val {
  font-family: var(--font-ui); font-size: 1.6rem;
  font-weight: 800; color: #fff; line-height: 1;
  letter-spacing: -0.02em;
}
.hero-stat-label {
  font-family: var(--font-ui); font-size: 0.7rem;
  color: rgba(255,255,255,0.5); margin-top: 0.2rem;
  text-transform: uppercase; letter-spacing: 0.08em;
}

/* ── Section block ──────────────────────────────── */
.detail-section {
  background: var(--white);
  border-radius: 12px;
  padding: 2rem 2.2rem;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05), 0 0 0 1px rgba(0,0,0,0.03);
  margin-bottom: 1.5rem;
}
.detail-section > h2 {
  font-family: var(--font-ui); font-size: 0.72rem;
  font-weight: 800; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.1em;
  margin-bottom: 1.2rem; padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 0.6rem;
}
.detail-section > h2::before {
  content: ''; display: inline-block;
  width: 3px; height: 0.9rem; background: var(--teal);
  border-radius: 3px; flex-shrink: 0;
}
.detail-section p {
  font-size: 0.97rem; line-height: 1.9; color: var(--text);
  margin-bottom: 1rem;
}
.detail-section p:last-child { margin-bottom: 0; }

/* ── Section intro (lead paragraph) ────────────── */
.section-lead {
  font-size: 1.05rem !important; color: var(--navy) !important;
  font-weight: normal; line-height: 1.8 !important;
  margin-bottom: 0.6rem !important;
}

/* ── RQ block (multiple questions) ─────────────── */
.rq-block {
  border-left: 3px solid var(--teal);
  padding: 0.85rem 1.2rem;
  background: #f0fafa;
  border-radius: 0 6px 6px 0;
  margin: 0.75rem 0;
}
.rq-label {
  font-family: var(--font-ui); font-size: 0.63rem;
  font-weight: 800; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--teal);
  margin-bottom: 0.3rem;
}
.rq-block p {
  font-size: 0.97rem; font-style: italic;
  color: var(--navy); margin: 0 !important; line-height: 1.65;
}

/* ── RQ single ──────────────────────────────────── */
.rq-single {
  font-size: 1.1rem; font-style: italic;
  color: var(--navy); line-height: 1.7;
  border-left: 3px solid var(--teal);
  padding: 0.9rem 1.4rem;
  margin: 1rem 0 0;
  background: #f0fafa;
  border-radius: 0 6px 6px 0;
}

/* ── Research process steps ─────────────────────── */
.process-steps {
  display: flex; align-items: flex-start;
  gap: 0; overflow-x: auto;
  padding: 0.4rem 0 0.5rem;
}
.process-step {
  flex: 1; min-width: 100px;
  display: flex; flex-direction: column; align-items: center;
  text-align: center; position: relative;
}
.process-step:not(:last-child)::after {
  content: '';
  position: absolute; top: 18px; left: calc(50% + 18px);
  width: calc(100% - 36px); height: 2px;
  background: var(--border);
}
.step-circle {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--navy); color: #fff;
  font-family: var(--font-ui); font-size: 0.75rem;
  font-weight: 700; display: flex; align-items: center;
  justify-content: center; margin-bottom: 0.6rem;
  flex-shrink: 0; position: relative; z-index: 1;
  border: 2px solid var(--navy);
}
.process-step.active .step-circle {
  background: var(--teal); border-color: var(--teal);
  box-shadow: 0 0 0 5px rgba(14,148,136,0.18);
}
.step-label {
  font-family: var(--font-ui); font-size: 0.72rem;
  font-weight: 600; color: var(--text); line-height: 1.3;
  padding: 0 0.2rem;
}
.process-step.active .step-label { color: var(--teal); }

/* ── Method cards ───────────────────────────────── */
.method-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem; margin-top: 0.5rem;
}
.method-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: 8px; padding: 1.2rem 1.2rem 1.1rem;
  border-top: 3px solid var(--accent);
  transition: box-shadow 0.18s;
}
.method-card:hover { box-shadow: 0 4px 18px rgba(0,0,0,0.07); }
.method-icon {
  font-size: 1.6rem; margin-bottom: 0.55rem; display: block;
}
.method-card h4 {
  font-family: var(--font-ui); font-size: 0.84rem;
  font-weight: 700; color: var(--navy);
  margin-bottom: 0.3rem; line-height: 1.35;
}
.method-card p {
  font-size: 0.79rem; color: var(--muted);
  line-height: 1.55; margin: 0 !important;
}

/* ── Insight cards ──────────────────────────────── */
.insight-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 1.2rem; margin-top: 0.5rem;
}
.insight-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: 10px; padding: 1.5rem 1.4rem 1.3rem;
  position: relative; overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
}
.insight-card:hover {
  box-shadow: 0 8px 28px rgba(0,0,0,0.09);
  transform: translateY(-2px);
}
.insight-card::before {
  content: ''; position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--teal-lt));
}
.insight-num {
  font-family: var(--font-display);
  font-size: 2.8rem; font-weight: 400;
  color: rgba(14,148,136,0.18);
  line-height: 1; margin-bottom: 0.6rem;
  display: block; letter-spacing: -0.02em;
}
.insight-card h4 {
  font-family: var(--font-ui); font-size: 0.95rem;
  font-weight: 700; color: var(--navy);
  line-height: 1.4; margin-bottom: 0.5rem;
}
.insight-card p {
  font-size: 0.84rem; color: var(--muted);
  line-height: 1.7; margin: 0 !important;
}

/* ── Pull quote ─────────────────────────────────── */
.pull-quote {
  background: linear-gradient(135deg, #0f1f35 0%, #1a2c47 100%);
  margin: 2rem -1.5rem; padding: 3rem 4rem 2.5rem;
  position: relative; overflow: hidden;
  text-align: center;
}
.pull-quote::before {
  content: '\201C';
  position: absolute; top: -0.8rem; left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-display); font-size: 12rem;
  line-height: 1; color: rgba(14,148,136,0.15);
  pointer-events: none;
}
.pull-quote blockquote {
  font-family: var(--font-display);
  font-size: 1.45rem; font-style: italic;
  color: #fff; line-height: 1.65;
  margin-bottom: 1.2rem; max-width: 700px;
  margin-left: auto; margin-right: auto;
  position: relative; z-index: 1;
}
.pull-quote cite {
  font-family: var(--font-ui); font-size: 0.8rem;
  color: rgba(255,255,255,0.5); font-style: normal;
  display: block; letter-spacing: 0.02em;
  position: relative; z-index: 1;
}

/* ── Highlight box ──────────────────────────────── */
.highlight-box {
  background: linear-gradient(135deg, #0a1e30 0%, #0e2a40 100%);
  border: 1px solid rgba(14,148,136,0.35);
  border-left: 4px solid var(--teal);
  border-radius: 8px; padding: 1.6rem 1.8rem;
  margin: 1.5rem 0;
}
.highlight-box h4 {
  font-family: var(--font-ui); font-size: 0.65rem;
  font-weight: 800; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--teal-lt);
  margin-bottom: 0.5rem;
}
.highlight-box p {
  font-size: 1.05rem; color: rgba(255,255,255,0.9) !important;
  line-height: 1.7; font-weight: 400;
  margin: 0 !important; max-width: 100% !important;
}

/* ── Study block ────────────────────────────────── */
.study-block {
  margin-top: 1.2rem;
}
.study-block-header {
  display: flex; align-items: center; gap: 1rem;
  margin-bottom: 0.9rem; flex-wrap: wrap;
}
.study-block-badge {
  font-family: var(--font-ui); font-size: 0.7rem;
  font-weight: 800; letter-spacing: 0.1em;
  text-transform: uppercase; color: #fff;
  background: var(--teal); padding: 0.25rem 0.7rem;
  border-radius: 4px;
}
.study-block-title {
  font-family: var(--font-ui); font-size: 1rem;
  font-weight: 700; color: var(--navy);
}
.study-block-tags {
  display: flex; flex-wrap: wrap; gap: 0.4rem;
  margin-bottom: 1rem;
}
.study-tag {
  font-family: var(--font-ui); font-size: 0.72rem;
  font-weight: 600; color: var(--teal);
  background: #f0fafa; border: 1px solid rgba(14,148,136,0.2);
  padding: 0.2rem 0.6rem; border-radius: 4px;
}
.study-takeaway {
  background: var(--bg); border-radius: 8px;
  padding: 1rem 1.2rem; margin-top: 1rem;
}
.study-takeaway-label {
  font-family: var(--font-ui); font-size: 0.65rem;
  font-weight: 800; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--teal);
  margin-bottom: 0.6rem;
}

/* ── Study flow ─────────────────────────────────── */
.study-flow { display: flex; align-items: center; gap: 0; }
.study-box {
  flex: 1; background: var(--tag-bg); border: 1px solid var(--border);
  border-radius: 6px; padding: 1.2rem 1.2rem; text-align: center;
}
.study-box h4 {
  font-family: var(--font-ui); font-size: 0.85rem;
  font-weight: 700; color: var(--navy); margin-bottom: 0.35rem;
}
.study-box p { font-size: 0.8rem; color: var(--muted); line-height: 1.55; }
.study-box .n-badge {
  display: inline-block; margin-top: 0.6rem;
  font-family: var(--font-ui); font-size: 0.78rem;
  font-weight: 700; background: var(--navy);
  color: #fff; padding: 0.18rem 0.65rem; border-radius: 3px;
}
.flow-arrow {
  font-size: 1.4rem; color: var(--accent);
  padding: 0 0.8rem; flex-shrink: 0;
}

/* ── Condition compare ──────────────────────────── */
.condition-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.cond-box { border: 2px solid var(--border); border-radius: 8px; overflow: hidden; }
.cond-box.active { border-color: var(--accent); }
.cond-header {
  background: var(--navy); color: #fff; padding: 0.65rem 1rem;
  font-family: var(--font-ui); font-size: 0.8rem;
  font-weight: 700; text-align: center;
}
.cond-body { padding: 1rem; }
.cond-row {
  display: flex; align-items: flex-start; gap: 0.5rem;
  margin-bottom: 0.55rem; font-size: 0.82rem; color: var(--text);
  line-height: 1.5;
}
.cond-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); margin-top: 0.45rem; flex-shrink: 0;
}

/* ── 2x2 factorial grid ─────────────────────────── */
.factorial-grid {
  display: grid; grid-template-columns: auto 1fr 1fr;
  gap: 0; border: 1px solid var(--border);
  border-radius: 6px; overflow: hidden;
}
.fg-corner { background: #fff; }
.fg-header {
  background: var(--navy); color: #fff; padding: 0.65rem 1rem;
  font-family: var(--font-ui); font-size: 0.77rem; font-weight: 700;
  text-align: center; border-left: 1px solid rgba(255,255,255,0.15);
}
.fg-row-label {
  background: var(--navy); color: #fff; padding: 0.8rem;
  font-family: var(--font-ui); font-size: 0.77rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  border-top: 1px solid rgba(255,255,255,0.15); text-align: center;
}
.fg-cell {
  background: var(--tag-bg); padding: 1rem 1.1rem;
  border-left: 1px solid var(--border); border-top: 1px solid var(--border);
  text-align: center;
}
.fg-cell h5 {
  font-family: var(--font-ui); font-size: 0.8rem;
  font-weight: 700; color: var(--navy); margin-bottom: 0.3rem;
}
.fg-cell p { font-size: 0.76rem; color: var(--muted); line-height: 1.45; }
.fg-cell.fg-best { background: #dff0e8; }
.fg-cell.fg-best h5 { color: #1a5c36; }

/* ── CSS bar chart ──────────────────────────────── */
.bar-chart { padding: 0.5rem 0; }
.bar-section-label {
  font-family: var(--font-ui); font-size: 0.72rem;
  font-weight: 700; color: var(--muted); text-transform: uppercase;
  letter-spacing: 0.08em; margin: 1rem 0 0.5rem 0;
}
.bar-row { display: flex; align-items: center; gap: 0.9rem; margin-bottom: 0.8rem; }
.bar-label {
  font-family: var(--font-ui); font-size: 0.77rem;
  color: var(--text); width: 170px; flex-shrink: 0; text-align: right;
}
.bar-track {
  flex: 1; background: #edf1f7; border-radius: 4px;
  height: 26px; overflow: hidden;
}
.bar-fill {
  height: 100%; border-radius: 4px;
  background: var(--accent);
  display: flex; align-items: center; padding-right: 8px;
  justify-content: flex-end;
}
.bar-fill.alt { background: #4a8fc1; }
.bar-fill.dim { background: #93b4cc; }
.bar-fill.good { background: #2e8b57; }
.bar-val {
  font-family: var(--font-ui); font-size: 0.72rem;
  font-weight: 700; color: #fff; white-space: nowrap;
}

/* ── Scale diagram ──────────────────────────────── */
.scale-diagram { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.scale-col { border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.scale-col-head {
  padding: 0.7rem 1rem; background: var(--navy);
  font-family: var(--font-ui); font-size: 0.8rem;
  font-weight: 700; color: #fff; text-align: center;
}
.scale-col-body { padding: 0.9rem 1rem; }
.scale-item {
  display: flex; align-items: flex-start; gap: 0.55rem;
  margin-bottom: 0.6rem; font-size: 0.82rem; color: var(--text);
  padding-bottom: 0.6rem; border-bottom: 1px solid var(--border);
  line-height: 1.5;
}
.scale-item:last-child { margin-bottom: 0; border-bottom: none; padding-bottom: 0; }
.scale-icon { font-size: 1rem; flex-shrink: 0; margin-top: 0.05rem; }

/* ── Implications list ──────────────────────────── */
.impl-list { list-style: none; padding: 0; margin: 0.5rem 0 0; counter-reset: impl; }
.impl-list li {
  font-size: 0.93rem; color: var(--text);
  line-height: 1.75; padding: 0.9rem 0 0.9rem 2.2rem;
  position: relative; counter-increment: impl;
  border-bottom: 1px solid var(--border);
}
.impl-list li:last-child { border-bottom: none; }
.impl-list li::before {
  content: counter(impl);
  position: absolute; left: 0; top: 0.9rem;
  width: 1.5rem; height: 1.5rem;
  background: var(--teal); color: #fff;
  font-family: var(--font-ui); font-size: 0.72rem;
  font-weight: 800; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}

/* ── Process narrative ──────────────────────────── */
.process-narrative {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 1.2rem; margin: 1.8rem 0 1.5rem;
}
.process-narrative-block {
  background: var(--bg); border-radius: 8px;
  padding: 1.3rem 1.4rem;
  border-top: 3px solid var(--teal);
}
.process-narrative-block h4 {
  font-family: var(--font-ui); font-size: 0.82rem;
  font-weight: 700; color: var(--navy);
  margin-bottom: 0.5rem;
}
.process-narrative-block p {
  font-size: 0.84rem; color: var(--muted);
  line-height: 1.7; margin: 0 !important;
}

/* ── Carousel ───────────────────────────────────── */
.carousel {
  margin: 1.5rem 0 0;
  border: 1px solid var(--border);
  border-radius: 10px; overflow: hidden;
  background: var(--bg);
}
.carousel-track { position: relative; }
.carousel-slide { display: none; background: var(--white); }
.carousel-slide.active { display: block; }
.carousel-slide img {
  width: 100%; height: 340px;
  display: block; object-fit: contain;
  background: var(--white);
}
.carousel-img-bordered {
  width: auto !important;
  max-width: 90%;
  max-height: 300px !important;
  margin: 20px auto !important;
  border: 1.5px solid #1a1a1a;
  box-sizing: border-box;
}
.carousel-caption {
  font-family: var(--font-ui); font-size: 0.86rem;
  color: var(--muted); text-align: center; font-style: normal;
  letter-spacing: 0.01em; line-height: 1.5;
  padding: 0.6rem 2.5rem; margin: 0 !important;
  background: var(--bg); border-top: 1px solid var(--border);
}
.carousel-controls {
  display: flex; align-items: center; justify-content: center;
  padding: 0.6rem 1rem;
  border-top: 1px solid var(--border);
  background: var(--white);
}
.carousel-btn {
  position: absolute; top: 50%; transform: translateY(-50%);
  background: rgba(255,255,255,0.92); border: 1px solid var(--border);
  border-radius: 50%; width: 34px; height: 34px;
  cursor: pointer; font-size: 1rem; color: var(--navy);
  display: flex; align-items: center; justify-content: center;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  z-index: 2;
}
.carousel-btn.prev { left: 0.7rem; }
.carousel-btn.next { right: 0.7rem; }
.carousel-btn:hover { background: var(--white); border-color: var(--teal); color: var(--teal); }
.carousel-dots { display: flex; gap: 0.5rem; }
.carousel-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--border); border: none; cursor: pointer;
  padding: 0; transition: background 0.15s;
}
.carousel-dot.active { background: var(--teal); }

/* ── Visual wrap ────────────────────────────────── */
.visual-wrap {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; padding: 1.8rem 1.8rem 1.8rem;
  margin: 1.5rem 0; overflow: visible;
}
.visual-caption {
  font-family: var(--font-ui); font-size: 0.75rem;
  color: var(--muted); text-align: center;
  margin-top: 1.1rem; font-style: italic;
}

/* ── XAI diagram ────────────────────────────────── */
.xai-diagram {
  display: flex; align-items: stretch;
  border: 1px solid var(--border); border-radius: 4px; overflow: hidden;
}
.xai-col {
  flex: 1; padding: 1.3rem 1.1rem; text-align: center;
  border-right: 1px solid var(--border);
}
.xai-col:last-child { border-right: none; }
.xai-col.highlight { background: var(--tag-bg); border-top: 3px solid var(--accent); }
.xai-col-icon { font-size: 1.8rem; margin-bottom: 0.5rem; display: block; }
.xai-col h4 {
  font-family: var(--font-ui); font-size: 0.82rem;
  font-weight: 700; color: var(--navy); margin-bottom: 0.3rem;
}
.xai-col p { font-size: 0.78rem; color: var(--muted); line-height: 1.5; }
.xai-col .xai-badge {
  display: inline-block; margin-top: 0.7rem;
  font-family: var(--font-ui); font-size: 0.65rem;
  font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
  background: var(--accent); color: #fff;
  padding: 0.18rem 0.6rem; border-radius: 3px;
}

/* ── DK chart ───────────────────────────────────── */
.dk-chart-wrap { text-align: center; }

/* ── Publication list ───────────────────────────── */
.pub-entry { padding: 1.3rem 0; border-bottom: 1px solid var(--border); }
.pub-entry:first-child { padding-top: 0; }
.pub-entry:last-child { border-bottom: none; }
.pub-entry-meta { display: flex; align-items: center; gap: 0.6rem; margin-bottom: 0.45rem; flex-wrap: wrap; }
.pub-badge {
  font-family: var(--font-ui); font-size: 0.68rem;
  font-weight: 700; letter-spacing: 0.07em; text-transform: uppercase;
  background: var(--navy); color: #fff; padding: 0.15rem 0.5rem; border-radius: 3px;
}
.pub-badge.review { background: #6e7e8e; }
.pub-date { font-family: var(--font-ui); font-size: 0.75rem; color: var(--muted); }
.pub-entry h3 {
  font-family: var(--font-ui); font-size: 0.97rem;
  font-weight: 700; color: var(--navy); line-height: 1.4; margin-bottom: 0.3rem;
}
.pub-entry h3 a { color: var(--navy); }
.pub-entry h3 a:hover { color: var(--accent); text-decoration: none; }
.pub-entry .authors { font-size: 0.85rem; color: var(--muted); margin-bottom: 0.35rem; }
.pub-entry .authors strong { color: var(--text); }
.pub-entry .venue-line { font-size: 0.83rem; color: var(--muted); font-style: italic; margin-bottom: 0.5rem; }
.pub-doi { font-family: var(--font-ui); font-size: 0.75rem; color: var(--accent); font-style: normal; }

/* ── Paper Figures ──────────────────────────────── */
.paper-figure {
  margin: 1.5rem 0 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
}
.paper-figure img {
  display: block;
  width: 100%;
  height: auto;
}
.paper-figure figcaption {
  padding: 0.65rem 0.9rem;
  font-family: var(--font-ui);
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.5;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.paper-figure-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0 0;
}
.paper-figure-pair .paper-figure { margin: 0; }

@media (max-width: 680px) {
  .paper-figure-pair { grid-template-columns: 1fr; }
}

/* ── My Role block ──────────────────────────────── */
.my-role-block {
  background: var(--navy);
  border-radius: 12px;
  padding: 1.4rem 1.8rem;
  margin: 0 0 1.5rem;
  display: flex;
  align-items: baseline;
  gap: 1.4rem;
  flex-wrap: wrap;
}
.my-role-label {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal-lt);
  white-space: nowrap;
  flex-shrink: 0;
}
.my-role-block p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.82);
  line-height: 1.75;
  margin: 0 !important;
}

/* ── Design iteration grid ──────────────────────── */
.iteration-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin-top: 1rem;
}
.iteration-box {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.2rem 1.3rem;
}
.iteration-label {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.8rem;
}
.iteration-list {
  list-style: none;
  padding: 0; margin: 0;
}
.iteration-list li {
  font-size: 0.86rem;
  color: var(--text);
  line-height: 1.6;
  padding: 0.4rem 0 0.4rem 1.1rem;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.iteration-list li:last-child { border-bottom: none; }
.iteration-list li::before {
  content: '';
  position: absolute; left: 0; top: 0.75rem;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--teal);
}
.iteration-box:last-child .iteration-list li::before { background: var(--accent); }

/* ── Project pagination ─────────────────────────── */
.proj-pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem 0 0;
  margin-top: 2rem;
  border-top: 1px solid var(--border);
  gap: 1rem;
}
.proj-prev-link,
.proj-next-link {
  font-family: var(--font-ui);
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--navy);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  transition: color 0.15s;
}
.proj-prev-link:hover,
.proj-next-link:hover { color: var(--teal); text-decoration: none; }
.proj-prev-arrow,
.proj-next-arrow { font-size: 1rem; }

/* ── Outcome note ───────────────────────────────── */
.outcome-note {
  background: linear-gradient(135deg, #f0fafa 0%, #e8f4f2 100%);
  border: 1px solid rgba(14,148,136,0.2);
  border-left: 4px solid var(--teal);
  border-radius: 0 8px 8px 0;
  padding: 1rem 1.3rem;
  margin-bottom: 1.2rem;
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.7;
}
.outcome-label {
  font-family: var(--font-ui);
  font-size: 0.63rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  display: block;
  margin-bottom: 0.3rem;
}

/* ── Publication context ────────────────────────── */
.pub-context {
  font-size: 0.85rem;
  color: var(--muted);
  font-style: italic;
  line-height: 1.6;
  margin: 0.3rem 0 0.5rem !important;
}

@media (max-width: 680px) {
  .iteration-grid { grid-template-columns: 1fr; }
  .proj-pagination { flex-direction: column; align-items: flex-start; }
  .my-role-block { flex-direction: column; gap: 0.5rem; }
}

/* ── Responsive ─────────────────────────────────── */
@media (max-width: 680px) {
/* ==============================================
   SERVICE PAGE
   ============================================== */
.service-section { margin-bottom: 3rem; }
.service-section ul { list-style: none !important; padding: 0 !important; margin: 0 !important; }

.service-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.service-list li {
  display: flex;
  gap: 1.5rem;
  align-items: baseline;
  font-size: 0.93rem;
  color: var(--text);
}
.service-year {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  min-width: 5rem;
  flex-shrink: 0;
}
.service-note {
  display: block;
  font-size: 0.8rem;
  color: var(--accent);
  margin-top: 0.2rem;
}

.service-block {
  margin-bottom: 1.8rem;
}
.service-block-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.5rem;
}
.service-block h3 {
  font-family: var(--font-ui);
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
}
.service-meta {
  font-size: 0.83rem;
  color: var(--muted);
  margin-top: 0.2rem;
}
.service-desc {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.7;
}
.service-points {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-top: 0.6rem;
  padding-left: 1rem;
  border-left: 2px solid var(--border);
}
.service-points p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.7;
}
.service-detail-list {
  padding-left: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.service-detail-list li {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.7;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
}
.course-term h4 {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.6rem;
}
.course-term ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.course-term li {
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.5;
}
.course-instr {
  display: block;
  font-size: 0.78rem;
  color: var(--muted);
}

/* ==============================================
   RESPONSIVE
   ============================================== */
  .hero { flex-direction: column; gap: 1.5rem; padding: 2.5rem 1.5rem 2rem; }
  .hero-photo, .hero-photo-placeholder { width: 110px; height: 110px; font-size: 2rem; }
  .hero-body h1 { font-size: 1.7rem; }
  .hero-actions { flex-direction: column; align-items: flex-start; gap: 0.8rem; }
  .hero-socials { padding-left: 0; border-left: none; padding-top: 0.5rem; border-top: 1px solid var(--border); }
  .contact-grid { grid-template-columns: 1fr; }
  .cv-box { flex-direction: column; }
  .nav-brand { display: none; }
  .nav-links a { padding: 0.3rem 0.5rem; font-size: 0.78rem; }
  .projects-grid { grid-template-columns: 1fr; }
  .condition-compare, .scale-diagram { grid-template-columns: 1fr; }
  .xai-diagram { flex-direction: column; }
  .xai-col { border-right: none; border-bottom: 1px solid var(--border); }
  .xai-col:last-child { border-bottom: none; }
  .study-flow { flex-direction: column; }
  .flow-arrow { transform: rotate(90deg); }
  .bar-label { width: 110px; font-size: 0.68rem; }
  .proj-hero { padding: 2rem 1.2rem; margin: -2.5rem -1.5rem 2rem; }
  .proj-hero h1 { font-size: 1.3rem; }
}