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

:root {
  --black: #1a1a1a;
  --white: #ffffff;
  --gray: #888;
  --light-gray: #f5f5f5;
  --mid-gray: #e0e0e0;
  --font: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --nav-height: 64px;

  /* ── Brand Blues ── */
  --blue-light:  #7CA5FE;   /* lightest */
  --blue-bright: #465EE6;   /* vibrant */
  --blue:        #3252D0;   /* primary brand */
  --blue-deep:   #1C3792;   /* deep */
  --blue-navy:   #0E1B8E;   /* darkest / navy */
}

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

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

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }

/* ─── HEADER ─── */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  height: var(--nav-height);
  padding: 0 3vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.35s, box-shadow 0.35s;
}
header.transparent { background: transparent; }
header.solid {
  background: rgba(255,255,255,0.97);
  box-shadow: 0 1px 0 rgba(0,0,0,0.07);
}
.logo a {
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: none;
  transition: color 0.3s;
}
header.transparent .logo a { color: var(--white); }
header.solid .logo a { color: var(--black); }

nav.main-nav {
  display: flex;
  gap: 2.2rem;
  align-items: center;
}
nav.main-nav a {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 400;
  transition: opacity 0.2s, color 0.3s;
}
nav.main-nav a:hover { opacity: 1; color: var(--blue-bright) !important; }
header.transparent nav.main-nav a { color: var(--white); }
header.solid nav.main-nav a { color: var(--black); }

/* Mobile burger */
.burger {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
  z-index: 210;
}
.burger span {
  display: block;
  width: 22px;
  height: 1px;
  transition: all 0.3s;
}
header.transparent .burger span { background: var(--white); }
header.solid .burger span { background: var(--black); }
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); background: var(--black) !important; }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); background: var(--black) !important; }

.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--white);
  z-index: 205;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2.8rem;
}
.mobile-overlay.open { display: flex; }
.mobile-overlay a {
  font-size: 1.5rem;
  font-weight: 300;
  letter-spacing: 0.06em;
  color: var(--black);
}

/* ─── PAGE WRAPPER (offset header) ─── */
.page-content {
  padding-top: var(--nav-height);
}

/* ─── HERO (homepage) ─── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 5rem 3vw 4rem;
  overflow: hidden;
  margin-top: calc(-1 * var(--nav-height));
  background: var(--blue-navy);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center 25%;
  background-repeat: no-repeat;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.72) 0%, rgba(0,0,0,0.18) 55%, rgba(0,0,0,0.06) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 640px;
}
.hero-content h1 {
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 300;
  color: var(--white);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}
.hero-content p {
  font-size: clamp(0.92rem, 1.5vw, 1.1rem);
  color: rgba(255,255,255,0.88);
  font-weight: 300;
  line-height: 1.75;
  max-width: 500px;
}

/* ─── SECTION SHARED ─── */
section { padding: 6rem 3vw; }

.section-label {
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 2.8rem;
  font-weight: 500;
}

/* ─── ABOUT STRIP (homepage) ─── */
.about-strip {
  max-width: 820px;
  margin: 0 auto;
  padding: 6rem 3vw;
}
.about-strip p {
  font-size: 1.06rem;
  line-height: 1.95;
  color: #333;
  margin-bottom: 1.3rem;
  font-weight: 300;
}
.about-strip p:last-of-type { margin-bottom: 2.5rem; }

/* ─── PROJECTS GRID ─── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
  max-width: 1400px;
  margin: 0 auto;
}

.project-card {
  position: relative;
  overflow: hidden;
  display: block;
  background: var(--light-gray);
  aspect-ratio: 4 / 3;
}
.project-card img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.7s cubic-bezier(0.25,0.46,0.45,0.94);
}
.project-card:hover img { transform: scale(1.05); }
.project-card-overlay {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  transition: background 0.4s;
  padding: 1.5rem;
  text-align: center;
}
.project-card:hover .project-card-overlay { background: rgba(14, 27, 142, 0.75); }
.project-card-title {
  color: var(--white);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 400;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.35s, transform 0.35s;
}
.project-card-sub {
  color: rgba(255,255,255,0.7);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  margin-top: 0.5rem;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.35s 0.05s, transform 0.35s 0.05s;
}
.project-card:hover .project-card-title,
.project-card:hover .project-card-sub {
  opacity: 1; transform: translateY(0);
}

/* ─── CTA SECTION ─── */
.cta-section {
  background: var(--blue-navy);
  text-align: center;
  padding: 7rem 3vw;
}
.cta-section h2 {
  color: var(--white);
  font-size: clamp(1.7rem, 3vw, 2.8rem);
  font-weight: 300;
  letter-spacing: -0.01em;
  margin-bottom: 2.5rem;
}

/* ─── BUTTONS ─── */
.btn {
  display: inline-block;
  padding: 0.82rem 2.4rem;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 400;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
  margin: 0.4rem;
  border-radius: 999px;
  cursor: pointer;
}
.btn-outline {
  border: 1px solid var(--blue);
  color: var(--blue);
  background: transparent;
}
.btn-outline:hover { background: var(--blue); color: var(--white); }
.btn-filled {
  border: 1px solid var(--blue);
  background: var(--blue);
  color: var(--white);
}
.btn-filled:hover { background: var(--blue-deep); border-color: var(--blue-deep); }
.btn-white {
  border: 1px solid rgba(255,255,255,0.6);
  color: var(--white);
  background: transparent;
}
.btn-white:hover { background: var(--white); color: var(--blue-navy); }

/* ─── CONTACT SECTION ─── */
.contact-section {
  text-align: center;
  padding: 7rem 3vw;
}
.contact-section h2 {
  font-size: clamp(1.5rem, 2.5vw, 2.4rem);
  font-weight: 300;
  letter-spacing: -0.01em;
  margin-bottom: 0.8rem;
}
.contact-section .sub {
  font-size: 0.9rem;
  color: var(--gray);
  font-weight: 300;
  margin-bottom: 2.8rem;
  line-height: 1.7;
}
.contact-info { margin-top: 2rem; }
.contact-info a {
  display: block;
  font-size: 0.95rem;
  color: var(--gray);
  margin-bottom: 0.5rem;
  transition: color 0.2s;
  font-weight: 300;
}
.contact-info a:hover { color: var(--black); }

/* ─── FOOTER ─── */
footer {
  border-top: 1px solid var(--mid-gray);
  padding: 2.2rem 3vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-brand {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}
nav.footer-nav {
  display: flex;
  gap: 1.8rem;
}
nav.footer-nav a {
  font-size: 0.7rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--gray);
  transition: color 0.2s;
}
nav.footer-nav a:hover { color: var(--blue); }

/* ─── PAGE HERO (inner pages) ─── */
.page-hero {
  padding: 6rem 3vw 4rem;
  border-bottom: 1px solid var(--mid-gray);
}
.page-hero h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 1.2rem;
}
.page-hero .intro {
  font-size: 1.05rem;
  font-weight: 300;
  line-height: 1.85;
  color: #444;
  max-width: 680px;
}

/* ─── PROJECT PAGE ─── */
.project-page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 3vw 6rem;
}
.project-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
  margin-bottom: 4rem;
}
.project-body.full { grid-template-columns: 1fr; max-width: 740px; }
.project-body p {
  font-size: 1rem;
  line-height: 1.9;
  color: #333;
  font-weight: 300;
  margin-bottom: 1.2rem;
}
.project-body p:last-child { margin-bottom: 0; }
.project-body a { text-decoration: underline; color: var(--blue); }
.project-body strong { color: var(--blue-deep); }

.project-gallery {
  display: grid;
  gap: 1.2rem;
  margin-bottom: 4rem;
}
.project-gallery.cols-2 { grid-template-columns: 1fr 1fr; }
.project-gallery.cols-3 { grid-template-columns: repeat(3, 1fr); }
.project-gallery.cols-1 { grid-template-columns: 1fr; max-width: 740px; }
.project-gallery img {
  width: 100%; height: 100%;
  object-fit: cover;
  background: var(--light-gray);
}
.project-gallery figure { overflow: hidden; }
.project-gallery figcaption {
  font-size: 0.75rem;
  color: var(--gray);
  margin-top: 0.6rem;
  letter-spacing: 0.04em;
}

.project-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--mid-gray);
  padding-top: 2.5rem;
  margin-top: 2rem;
}
.project-nav a {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray);
  transition: color 0.2s;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.project-nav a:hover { color: var(--blue); }
.project-nav a.prev::before { content: '←'; }
.project-nav a.next::after { content: '→'; }

/* ─── RESUME PAGE ─── */
.resume-page {
  max-width: 820px;
  margin: 0 auto;
  padding: 4rem 3vw 7rem;
}
.resume-pdf-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  border: 1px solid var(--blue-light);
  padding: 0.6rem 1.4rem;
  border-radius: 3px;
  margin-bottom: 3.5rem;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.resume-pdf-link:hover { border-color: var(--blue); background: var(--blue); color: var(--white); }

.resume-section { margin-bottom: 3.5rem; }
.resume-section h2 {
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 1.8rem;
  font-weight: 500;
  padding-bottom: 0.8rem;
  border-bottom: 2px solid var(--blue-light);
}
.resume-item { margin-bottom: 2rem; }
.resume-item-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.3rem;
}
.resume-item-title {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.resume-item-date {
  font-size: 0.78rem;
  color: var(--gray);
  font-weight: 300;
  white-space: nowrap;
}
.resume-item-sub {
  font-size: 0.88rem;
  color: #555;
  margin-bottom: 0.7rem;
  font-weight: 300;
  font-style: italic;
}
.resume-item ul {
  list-style: none;
  padding: 0;
}
.resume-item li {
  font-size: 0.9rem;
  line-height: 1.75;
  color: #333;
  font-weight: 300;
  padding-left: 1.2rem;
  position: relative;
  margin-bottom: 0.35rem;
}
.resume-item li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--mid-gray);
  font-size: 0.8rem;
}
.resume-item p {
  font-size: 0.9rem;
  line-height: 1.75;
  color: #333;
  font-weight: 300;
  margin-bottom: 0.4rem;
}

/* ─── ABOUT PAGE ─── */
.about-page {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 3vw 7rem;
  align-items: start;
}
.about-page .text-col h1 {
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  font-weight: 300;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 2rem;
}
.about-page .text-col p {
  font-size: 1rem;
  line-height: 1.9;
  color: #333;
  font-weight: 300;
  margin-bottom: 1.3rem;
}
.about-page .img-col img {
  width: 100%;
  object-fit: cover;
}

/* ─── PROJECTS INDEX PAGE ─── */
.projects-index {
  padding: 4rem 3vw 6rem;
  max-width: 1400px;
  margin: 0 auto;
}
.projects-index h1 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  margin-bottom: 3rem;
}
.projects-index-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
}
.projects-index-card {
  display: block;
  background: var(--light-gray);
}
.projects-index-card .card-img {
  aspect-ratio: 4/3;
  overflow: hidden;
}
.projects-index-card .card-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.7s cubic-bezier(0.25,0.46,0.45,0.94);
}
.projects-index-card:hover .card-img img { transform: scale(1.04); }
.projects-index-card:hover .card-label h3 { color: var(--blue); }
.projects-index-card .card-label {
  padding: 1.1rem 1.2rem 1.3rem;
}
.projects-index-card .card-label h3 {
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-bottom: 0.3rem;
}
.projects-index-card .card-label p {
  font-size: 0.78rem;
  color: var(--gray);
  font-weight: 300;
  line-height: 1.55;
}

/* ─── GALLERY (side projects) ─── */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 3rem;
}
.gallery-grid img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  background: var(--light-gray);
}

/* ─── SCROLL FADE ANIMATION ─── */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.85s ease, transform 0.85s ease;
}
.fade-up.visible { opacity: 1; transform: none; }

/* ─── RESPONSIVE ─── */
@media (max-width: 960px) {
  .projects-grid,
  .projects-index-grid { grid-template-columns: repeat(2, 1fr); }
  .about-page { grid-template-columns: 1fr; gap: 2.5rem; }
  .project-body { grid-template-columns: 1fr; gap: 2rem; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .projects-grid,
  .projects-index-grid,
  .project-gallery.cols-2,
  .project-gallery.cols-3,
  .gallery-grid { grid-template-columns: 1fr; }
  nav.main-nav { display: none; }
  .burger { display: flex; }
  footer { flex-direction: column; gap: 1.4rem; text-align: center; }
  .project-nav { flex-direction: column; gap: 1.5rem; align-items: flex-start; }
  .resume-item-header { flex-direction: column; }
}