/* ============================================================
   Neha Nayak — Interior Design Portfolio
   Shared design system
   ============================================================ */

:root {
  --bg: #faf8f5;
  --bg-alt: #f1eee8;
  --ink: #1c1b18;
  --ink-soft: #55524b;
  --muted: #8a857a;
  --line: #e3dfd7;
  --dark: #14130f;
  --dark-ink: #f4f1ea;
  --accent: #a08a63;
  --font-display: "Playfair Display", Georgia, "Times New Roman", serif;
  --font-body: "Jost", "Futura", "Century Gothic", -apple-system, Helvetica, Arial, sans-serif;
  --space: clamp(4rem, 9vw, 7.5rem);
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --header-h: 4.25rem;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.15;
  margin: 0 0 1rem;
}

p { margin: 0 0 1rem; }

.container {
  width: min(1200px, 100% - 2 * var(--gutter));
  margin-inline: auto;
}

/* ---------- Header / Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.brand span { color: var(--muted); }

.site-nav ul {
  display: flex;
  gap: 2.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-soft);
  transition: color 0.2s;
}

.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  padding: 0.5rem;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  margin: 5px 0;
  transition: transform 0.25s, opacity 0.25s;
}

@media (max-width: 767px) {
  .nav-toggle { display: block; }

  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .site-nav.open { max-height: 22rem; }

  .site-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 0.75rem 0 1.25rem;
  }

  .site-nav li { text-align: center; }

  .site-nav a { display: block; padding: 0.7rem 0; font-size: 0.85rem; }

  body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
  body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* ---------- Section scaffolding ---------- */

.section { padding-block: var(--space); }
.section--alt { background: var(--bg-alt); }
.section--dark { background: var(--dark); color: var(--dark-ink); }
.section--dark .eyebrow { color: var(--accent); }

.eyebrow {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.9rem;
}

.section-title {
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  margin-bottom: 2.25rem;
}

/* ---------- Index hero (full-screen background) ---------- */

.hero--full {
  position: relative;
  min-height: calc(100svh - var(--header-h));
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(12, 11, 9, 0.8) 0%,
    rgba(12, 11, 9, 0.35) 50%,
    rgba(12, 11, 9, 0.12) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  color: var(--dark-ink);
  padding-block: clamp(3rem, 8vh, 6rem);
}

.hero-content h1 {
  font-size: clamp(2.8rem, 7.5vw, 5.5rem);
  letter-spacing: 0.06em;
  margin-bottom: 1.25rem;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.35);
}

.hero-content .tagline {
  font-size: 0.85rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: rgba(244, 241, 234, 0.92);
  border-top: 1px solid rgba(244, 241, 234, 0.65);
  padding-top: 1rem;
  display: inline-block;
}

.hero-lede {
  max-width: 34rem;
  margin-top: 1.25rem;
  color: rgba(244, 241, 234, 0.85);
}

@media (max-width: 767px) {
  .hero--full { min-height: 78svh; }
  .hero-content { padding-block: 2.5rem; }
}

/* ---------- Project hero (detail pages) ---------- */

.project-hero { padding-top: clamp(3rem, 6vw, 5rem); }

.project-hero .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 2.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

.project-hero h1 { font-size: clamp(2.2rem, 6vw, 4rem); }

.project-hero .banner {
  margin-top: clamp(1.75rem, 4vw, 3rem);
  max-height: 70vh;
  overflow: hidden;
}

.project-hero .banner img { width: 100%; object-fit: cover; }

/* ---------- Split (brief / scope) ---------- */

.split {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}

@media (max-width: 767px) { .split { grid-template-columns: 1fr; } }

.scope-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.scope-list li {
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.section--dark .scope-list,
.section--dark .scope-list li { border-color: #2e2c26; color: #c9c4b8; }

/* ---------- Galleries ---------- */

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr));
  gap: clamp(1rem, 2.5vw, 1.75rem);
}

.gallery--two { grid-template-columns: repeat(auto-fill, minmax(min(420px, 100%), 1fr)); }
.gallery--full { grid-template-columns: 1fr; }

.gallery figure {
  margin: 0;
  cursor: zoom-in;
  background: #fff;
  border: 1px solid var(--line);
}

.section--dark .gallery figure { background: #1d1b17; border-color: #2e2c26; }

.gallery figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 0.45s ease, opacity 0.3s;
}

.gallery--natural figure img,
.gallery--full figure img { aspect-ratio: auto; object-fit: contain; }

.gallery figure:hover img { opacity: 0.92; }

.gallery figcaption {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.7rem 0.9rem;
  border-top: 1px solid var(--line);
}

.section--dark .gallery figcaption { border-color: #2e2c26; }

/* ---------- Project cards (index) ---------- */

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(320px, 100%), 1fr));
  gap: clamp(1.25rem, 3vw, 2rem);
}

.project-card {
  display: block;
  background: #fff;
  border: 1px solid var(--line);
  overflow: hidden;
}

.project-card .thumb { overflow: hidden; }

.project-card .thumb img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.project-card .card-body { padding: 1.25rem 1.4rem 1.5rem; }

.project-card .card-tag {
  font-size: 0.68rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--muted);
}

.project-card h3 {
  font-size: 1.35rem;
  margin: 0.4rem 0 0;
}

/* ---------- About ---------- */

.about-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}

.about-grid .portrait img { width: 100%; filter: grayscale(1); }

.portrait-contact { margin-top: 1.5rem; }

.portrait-contact h4 {
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.6rem;
}

.portrait-contact ul {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.portrait-contact li { padding: 0.28rem 0; }

.portrait-contact a {
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.1rem;
  transition: color 0.2s, border-color 0.2s;
}

.portrait-contact a:hover { color: var(--ink); border-color: var(--accent); }

/* ---------- Buttons ---------- */

a.btn {
  display: inline-block;
  margin-top: 1.25rem;
  padding: 0.7rem 1.6rem;
  border: 1px solid var(--ink);
  font-size: 0.75rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink);
  transition: background 0.25s, color 0.25s;
}

a.btn:hover {
  background: var(--dark);
  color: var(--dark-ink);
  border-color: var(--dark);
}

@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-grid .portrait { max-width: 280px; }
}

.facts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
  margin-top: 2.5rem;
}

.facts-grid h4 {
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.facts-grid ul {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.facts-grid li { padding: 0.28rem 0; }

.facts-grid a {
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.1rem;
  transition: color 0.2s, border-color 0.2s;
}

.facts-grid a:hover { color: var(--ink); border-color: var(--accent); }

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.tag-list li {
  border: 1px solid var(--line);
  padding: 0.35rem 0.9rem;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: #fff;
}

/* ---------- Prev / next project ---------- */

.project-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
}

.project-pager a {
  padding: 2rem var(--gutter);
  transition: background 0.25s;
}

.project-pager a:hover { background: var(--bg-alt); }

.project-pager .next { text-align: right; border-left: 1px solid var(--line); }

.project-pager .label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.project-pager .title { font-family: var(--font-display); font-size: 1.3rem; }

@media (max-width: 600px) {
  .project-pager { grid-template-columns: 1fr; }
  .project-pager .next { border-left: 0; border-top: 1px solid var(--line); }
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--dark);
  color: var(--dark-ink);
  padding: var(--space) 0 2rem;
}

.site-footer h2 { font-size: clamp(1.9rem, 4.5vw, 3rem); }

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 3rem;
  margin: 2rem 0 3.5rem;
  font-size: 1.05rem;
}

.footer-contact a {
  border-bottom: 1px solid var(--accent);
  padding-bottom: 0.15rem;
  transition: color 0.2s;
}

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

.footer-base {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  justify-content: space-between;
  border-top: 1px solid #2e2c26;
  padding-top: 1.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #8f8a7e;
}

/* ---------- Lightbox ---------- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(12, 11, 9, 0.94);
  display: none;
  align-items: center;
  justify-content: center;
}

.lightbox.open { display: flex; }

.lightbox img {
  max-width: min(94vw, 1500px);
  max-height: 86vh;
  object-fit: contain;
}

.lightbox .lb-caption {
  position: absolute;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  color: #cfcabe;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  text-align: center;
  max-width: 90vw;
}

.lightbox button {
  position: absolute;
  background: none;
  border: 0;
  color: #efece4;
  font-size: 2rem;
  line-height: 1;
  cursor: pointer;
  padding: 1rem;
  opacity: 0.75;
  transition: opacity 0.2s;
}

.lightbox button:hover { opacity: 1; }

.lightbox .lb-close { top: 0.75rem; right: 0.9rem; }
.lightbox .lb-prev { left: 0.4rem; top: 50%; transform: translateY(-50%); }
.lightbox .lb-next { right: 0.4rem; top: 50%; transform: translateY(-50%); }

@media (max-width: 600px) {
  .lightbox .lb-prev, .lightbox .lb-next { padding: 0.6rem; font-size: 1.6rem; }
}

/* ---------- Reveal on scroll ---------- */

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .gallery figure img, .project-card .thumb img { transition: none; }
}