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

:root {
  --navy:   #1a2b4a;
  --navy-light: #243859;
  --accent: #2f6fcd;
  --gray-50:  #f8f9fb;
  --gray-100: #f1f3f7;
  --gray-300: #d1d5db;
  --gray-500: #6b7280;
  --gray-700: #374151;
  --gray-900: #111827;
  --white: #ffffff;
  --radius: 10px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  color: var(--gray-900);
  background: var(--white);
  line-height: 1.65;
  font-size: 15px;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ── Utility ── */
.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: 80px 0; }
.section-gray { background: var(--gray-50); }

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 48px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--accent);
  margin-top: 8px;
  border-radius: 2px;
}

/* ── Buttons ── */
.btn {
  display: inline-block;
  padding: 11px 28px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
}

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

.btn-primary:hover { background: #2558a8; }

.btn-outline {
  border: 2px solid var(--white);
  color: var(--white);
}

.btn-outline:hover {
  background: var(--white);
  color: var(--navy);
}

/* ── Nav ── */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--white);
  border-bottom: 1px solid var(--gray-100);
  transition: box-shadow var(--transition);
}

#navbar.scrolled { box-shadow: var(--shadow); }

.nav-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 700;
  font-size: 1rem;
  color: var(--navy);
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  gap: 36px;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-700);
  transition: color var(--transition);
}

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

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

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ── Hero ── */
#hero {
  padding: 140px 0 80px;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  color: var(--white);
  text-align: center;
}

.hero-inner {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 24px;
}

.hero-photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  margin: 0 auto 24px;
  overflow: hidden;
  border: 3px solid rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.photo-initials {
  display: none;
  font-size: 2.5rem;
  font-weight: 700;
  color: rgba(255,255,255,0.8);
  width: 100%;
  height: 100%;
  align-items: center;
  justify-content: center;
}

#hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.hero-title {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.75);
  margin-bottom: 8px;
}

.hero-sub {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 36px;
}

.hero-links {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── About ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.about-text p {
  color: var(--gray-700);
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.about-text p:last-child { margin-bottom: 0; }

.about-facts {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  overflow: hidden;
}

.fact {
  display: flex;
  flex-direction: column;
  padding: 14px 20px;
  border-bottom: 1px solid var(--gray-100);
}

.fact:last-child { border-bottom: none; }

.fact-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gray-500);
  margin-bottom: 2px;
}

.fact-value {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-900);
}

/* ── Skills ── */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.skills-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

.skills-card h3 {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--navy);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--gray-100);
}

.skills-card ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.skills-card li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--gray-700);
}

.skills-card li::before {
  content: '';
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

/* ── Timeline ── */
.timeline {
  position: relative;
  padding-left: 28px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--gray-300);
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
}

.timeline-item:last-child { margin-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: -26px;
  top: 18px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--white);
  box-shadow: 0 0 0 2px var(--accent);
}

.timeline-card {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  padding: 24px 28px;
  box-shadow: var(--shadow);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.timeline-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 3px;
}

.timeline-role {
  font-size: 0.85rem;
  color: var(--gray-500);
}

.timeline-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  flex-shrink: 0;
}

.timeline-date {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}

.timeline-location {
  font-size: 0.8rem;
  color: var(--gray-500);
}

.timeline-card ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.timeline-card li {
  font-size: 0.875rem;
  color: var(--gray-700);
  padding-left: 14px;
  position: relative;
  line-height: 1.55;
}

.timeline-card li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* ── Projects ── */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.project-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  transition: box-shadow var(--transition);
}

.project-card:hover { box-shadow: var(--shadow-lg); }

.project-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: rgba(47, 111, 205, 0.08);
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.project-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 4px;
}

.project-date {
  font-size: 0.78rem;
  color: var(--gray-500);
  margin-bottom: 12px;
}

.project-card > p {
  font-size: 0.875rem;
  color: var(--gray-700);
  margin-bottom: 14px;
  line-height: 1.55;
}

.project-card ul {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.project-card li {
  font-size: 0.85rem;
  color: var(--gray-700);
  padding-left: 14px;
  position: relative;
  line-height: 1.5;
}

.project-card li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* ── Contact ── */
#contact {
  background: var(--navy);
  color: var(--white);
}

#contact .section-title { color: var(--white); }
#contact .section-title::after { background: rgba(255,255,255,0.5); }

.contact-sub {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 40px;
  max-width: 500px;
}

.contact-grid {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  padding: 18px 24px;
  flex: 1;
  min-width: 220px;
  transition: background var(--transition);
}

.contact-item:hover { background: rgba(255,255,255,0.14); }

.contact-icon {
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.12);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  flex-shrink: 0;
}

.contact-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.5);
  margin-bottom: 2px;
}

.contact-value {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--white);
}

/* ── Footer ── */
footer {
  background: #0f1c30;
  padding: 20px 24px;
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  section { padding: 60px 0; }

  .hamburger { display: flex; }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 16px 24px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--gray-100);
    box-shadow: var(--shadow);
  }

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

  .nav-links a {
    padding: 10px 0;
    font-size: 0.95rem;
    border-bottom: 1px solid var(--gray-100);
  }

  .nav-links li:last-child a { border-bottom: none; }

  #hero { padding: 120px 0 60px; }
  #hero h1 { font-size: 1.9rem; }

  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }

  .timeline-header { flex-direction: column; gap: 4px; }
  .timeline-meta { align-items: flex-start; }

  .contact-grid { flex-direction: column; }
  .contact-item { min-width: unset; }
}

@media (max-width: 480px) {
  #hero h1 { font-size: 1.6rem; }
  .section-title { font-size: 1.4rem; }
}

/* ══ Multi-page additions ══ */
.nav-links a.active { color: var(--accent); }

/* Sub-page: clear the fixed nav */
.page { padding-top: 64px; }

/* Page header band */
.page-header {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  color: var(--white);
  padding: 56px 0 50px;
  text-align: center;
}
.page-header h1 { font-size: 2rem; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 10px; }
.page-header p { color: rgba(255,255,255,0.72); font-size: 0.95rem; max-width: 580px; margin: 0 auto; }

/* Back link */
.back-link { display: inline-block; font-size: 0.85rem; font-weight: 600; color: var(--accent); margin-bottom: 22px; }
.back-link:hover { text-decoration: underline; }

/* Projects index — cards with images */
.proj-index-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.proj-index-card {
  display: flex; flex-direction: column; background: var(--white);
  border: 1px solid var(--gray-100); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); transition: box-shadow var(--transition), transform var(--transition);
}
.proj-index-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.proj-index-img { width: 100%; aspect-ratio: 4/3; object-fit: cover; background: var(--gray-100); display: block; }
.proj-index-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.proj-index-body .project-tag { margin-bottom: 10px; }
.proj-index-body h3 { font-size: 1.05rem; font-weight: 700; color: var(--navy); margin-bottom: 4px; }
.proj-index-body p { font-size: 0.875rem; color: var(--gray-700); margin: 0 0 14px; line-height: 1.55; flex: 1; }
.proj-index-more { font-size: 0.82rem; font-weight: 600; color: var(--accent); }

/* Project detail page */
.project-detail { padding: 52px 0 80px; }
.project-detail-header { margin-bottom: 26px; }
.project-detail-header h1 { font-size: 1.9rem; font-weight: 700; color: var(--navy); margin: 10px 0 6px; letter-spacing: -0.01em; }
.project-detail-meta { font-size: 0.9rem; color: var(--gray-500); }
.project-detail-img {
  width: 100%; max-height: 480px; object-fit: cover; border-radius: var(--radius);
  box-shadow: var(--shadow); margin-bottom: 32px; background: var(--gray-100);
}
.project-detail-body { max-width: 760px; }
.project-detail-body p { color: var(--gray-700); font-size: 0.98rem; margin-bottom: 18px; line-height: 1.7; }
.project-detail-body h3 { font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--navy); margin: 6px 0 14px; }
.project-detail-body ul { display: flex; flex-direction: column; gap: 10px; margin-bottom: 8px; }
.project-detail-body li { font-size: 0.92rem; color: var(--gray-700); padding-left: 16px; position: relative; line-height: 1.6; }
.project-detail-body li::before { content: '·'; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* "View all" CTA */
.section-cta { text-align: center; margin-top: 40px; }

/* Resume page */
.resume-page { padding: 44px 0 80px; }
.resume-download { text-align: center; margin-bottom: 44px; }
.resume-block { max-width: 800px; margin: 0 auto; }
.resume-block + .resume-block { margin-top: 40px; }
.resume-block > h2 {
  font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--navy); padding-bottom: 10px; border-bottom: 2px solid var(--gray-100); margin-bottom: 20px;
}
.resume-entry { margin-bottom: 24px; }
.resume-entry:last-child { margin-bottom: 0; }
.resume-entry .r-head { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.resume-entry h3 { font-size: 1rem; color: var(--navy); font-weight: 700; }
.resume-entry .r-when { font-size: 0.82rem; color: var(--accent); font-weight: 600; white-space: nowrap; }
.resume-entry .r-sub { font-size: 0.85rem; color: var(--gray-500); margin-bottom: 8px; }
.resume-entry ul { display: flex; flex-direction: column; gap: 7px; }
.resume-entry li { font-size: 0.88rem; color: var(--gray-700); padding-left: 15px; position: relative; line-height: 1.55; }
.resume-entry li::before { content: '·'; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
.resume-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.resume-tags span { font-size: 0.82rem; color: var(--gray-700); background: var(--gray-100); padding: 5px 12px; border-radius: 20px; }

/* Placeholder cover for projects without a photo */
.proj-cover-ph { width: 100%; aspect-ratio: 4/3; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--navy) 0%, var(--accent) 100%); }
.proj-cover-ph span { color: #fff; font-weight: 700; font-size: 0.85rem; letter-spacing: 0.1em; text-transform: uppercase; opacity: 0.92; }

@media (max-width: 768px) {
  .proj-index-grid { grid-template-columns: 1fr; }
}