/* ════════════════════════════════════════════════
   NITHYA SELVARAJ — Portfolio
   style.css
   ════════════════════════════════════════════════ */

/* ── Custom properties ───────────────────────── */
:root {
  --white:      #FFFFFF;
  --off-white:  #F5F4F1;
  --black:      #1A1A1A;
  --mid:        #767676;
  --border:     #E2E1DE;

  --font-serif: 'DM Serif Display', Georgia, serif;
  --font-sans:  'Inter', system-ui, -apple-system, sans-serif;

  --ease-quint: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-circ:  cubic-bezier(0.16, 1, 0.3, 1);

  --pad-x:  clamp(24px, 5vw, 72px);
  --max-w:  1320px;
  --nav-h:  72px;
}

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

html {
  font-size: 16px;
  scroll-behavior: auto; /* Lenis overrides this */
}

body {
  font-family: var(--font-sans);
  background-color: var(--white);
  color: var(--black);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.65;
}

/* Lenis class hooks */
html.lenis { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto; }

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

/* ── Layout ──────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

/* ── Typography helpers ──────────────────────── */
.section-label {
  display: block;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mid);
  margin-bottom: 56px;
}

.section-label--light {
  color: rgba(255, 255, 255, 0.35);
}

/* ── Placeholder images ──────────────────────── */
.img-placeholder {
  width: 100%;
  aspect-ratio: 4 / 3;
  background-color: var(--off-white);
  border: 1px dashed var(--border);
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
}

.img-placeholder span {
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #C0BEB9;
}

.img-placeholder--tall {
  aspect-ratio: 3 / 4;
}

/* ════════════════════════════════════════════════
   NAVIGATION
   ════════════════════════════════════════════════ */
#nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  z-index: 100;
  transition:
    background-color 0.55s var(--ease-quint),
    backdrop-filter  0.55s var(--ease-quint),
    border-color     0.55s var(--ease-quint);
  border-bottom: 1px solid transparent;
}

#nav.is-scrolled {
  background-color: rgba(255, 255, 255, 0.84);
  backdrop-filter: saturate(180%) blur(22px);
  -webkit-backdrop-filter: saturate(180%) blur(22px);
  border-color: rgba(0, 0, 0, 0.07);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  text-decoration: none;
  color: var(--black);
  letter-spacing: 0.05em;
  line-height: 1;
  transition: opacity 0.2s;
}

.nav-brand:hover { opacity: 0.6; }

.nav-menu {
  display: flex;
  gap: 40px;
}

.nav-menu a {
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--black);
  position: relative;
  padding-bottom: 3px;
  transition: opacity 0.2s;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: var(--black);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s var(--ease-quint);
}

.nav-menu a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* ════════════════════════════════════════════════
   HERO
   ════════════════════════════════════════════════ */
#hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
}

.hero-inner { width: 100%; }

.hero-eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mid);
  margin-bottom: 28px;
  opacity: 0; /* animated by GSAP */
}

.hero-name {
  font-family: var(--font-serif);
  font-size: clamp(4.8rem, 11.5vw, 11rem);
  font-weight: 400;
  line-height: 0.92;
  letter-spacing: -0.025em;
  margin-bottom: 44px;
}

/* Line-clip reveal — hides overflow so text slides up from below */
.line-clip {
  display: block;
  overflow: hidden;
  padding-bottom: 0.05em; /* prevent descender clipping */
}

.line-inner {
  display: block;
  transform: translateY(112%); /* GSAP animates this to 0 */
}

.hero-meta {
  font-size: clamp(0.82rem, 1.1vw, 0.95rem);
  color: var(--mid);
  font-weight: 300;
  letter-spacing: 0.04em;
  opacity: 0; /* animated by GSAP */
}

/* Scroll hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 44px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  opacity: 0; /* animated by GSAP */
}

.hero-scroll-hint span {
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mid);
}

.scroll-bar {
  width: 1px;
  height: 52px;
  background: linear-gradient(to bottom, var(--mid) 0%, transparent 100%);
  transform-origin: top;
  animation: scroll-pulse 2.4s var(--ease-quint) infinite;
}

@keyframes scroll-pulse {
  0%   { transform: scaleY(0); opacity: 0; }
  25%  { opacity: 1; }
  75%  { transform: scaleY(1); opacity: 1; }
  100% { transform: scaleY(1); opacity: 0; }
}

/* ════════════════════════════════════════════════
   SELECTED WORK
   ════════════════════════════════════════════════ */
#work {
  padding: clamp(80px, 10vw, 140px) 0;
}

#work > .container {
  /* holds the section label */
}

.project {
  padding: clamp(64px, 8vw, 108px) 0;
  border-top: 1px solid var(--border);
  overflow: hidden;
}

.project:last-of-type {
  border-bottom: 1px solid var(--border);
}

.project-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 7vw, 88px);
  align-items: center;
}

/* Alternate: image on right */
.project--alt .project-inner {
  grid-template-columns: 1fr 1fr;
}

.project--alt .project-media {
  order: 2;
}

.project--alt .project-copy {
  order: 1;
}

/* Image hover scale */
.project-media {
  overflow: hidden;
  border-radius: 3px;
}

.project-media .img-placeholder {
  transition: transform 0.9s var(--ease-quint);
}

.project:hover .project-media .img-placeholder {
  transform: scale(1.04);
}

.project-num {
  display: block;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--mid);
  margin-bottom: 20px;
}

.project-title {
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 3.5vw, 3rem);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin-bottom: 14px;
}

.project-type {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mid);
  margin-bottom: 22px;
}

.project-desc {
  font-size: 0.9rem;
  line-height: 1.85;
  color: #555555;
  margin-bottom: 28px;
  max-width: 400px;
}

.project-badge {
  display: inline-block;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mid);
  border: 1px solid var(--border);
  padding: 7px 16px;
  border-radius: 100px;
}

/* ════════════════════════════════════════════════
   ABOUT
   ════════════════════════════════════════════════ */
#about {
  background-color: var(--off-white);
  padding: clamp(80px, 10vw, 140px) 0;
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: clamp(48px, 8vw, 110px);
  align-items: start;
}

.about-media {
  position: sticky;
  top: calc(var(--nav-h) + 32px);
}

.about-media .img-placeholder--tall {
  border-radius: 3px;
}

.about-copy .section-label {
  margin-bottom: 20px;
}

.about-heading {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 3.5vw, 3.1rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-top: 8px;
  margin-bottom: 32px;
}

.about-heading em {
  font-style: italic;
  color: #555;
}

.about-copy p {
  font-size: 0.92rem;
  line-height: 1.88;
  color: #555;
  margin-bottom: 18px;
}

.about-stats {
  margin-top: 48px;
  border-top: 1px solid var(--border);
  padding-top: 8px;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  gap: 20px;
}

.stat-key {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mid);
  flex-shrink: 0;
}

.stat-val {
  font-size: 0.85rem;
  font-weight: 500;
  text-align: right;
}

/* ════════════════════════════════════════════════
   SKILLS
   ════════════════════════════════════════════════ */
#skills {
  padding: clamp(80px, 10vw, 140px) 0;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 56px 72px;
}

.skill-group-label {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mid);
  margin-bottom: 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.logos-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* Logo tile */
.logo-tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  cursor: default;
}

.logo-icon {
  width: 60px;
  height: 60px;
  border-radius: 14px;
  background-color: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition:
    transform  0.4s var(--ease-quint),
    box-shadow 0.4s var(--ease-quint);
  will-change: transform;
}

/* Native brand mark, sits directly on the page */
.logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

/* Self-contained app icon (carries its own background) fills the tile */
.logo-icon--full .logo-img {
  width: 100%;
  height: 100%;
}

.logo-tile:hover .logo-icon {
  transform: translateY(-7px) scale(1.06);
}

/* Shadow only on full app icons (transparent marks would show a floating box) */
.logo-tile:hover .logo-icon--full {
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.18);
}

.logo-tile > p {
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  color: var(--mid);
  text-align: center;
  line-height: 1.3;
}

/* ── Hands-on / fabrication skills (not apps — no logos) ── */
.fabrication {
  margin-top: 64px;
}

.skill-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.skill-chip {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--black);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 10px 22px;
  transition: border-color 0.3s var(--ease-quint), color 0.3s;
}

.skill-chip:hover {
  border-color: var(--black);
}

/* ════════════════════════════════════════════════
   CONTACT
   ════════════════════════════════════════════════ */
#contact {
  background-color: var(--black);
  padding: clamp(88px, 12vw, 168px) 0;
  text-align: center;
}

.contact-inner {
  /* max-width narrowed for contact */
  max-width: 840px;
}

.contact-heading {
  font-family: var(--font-serif);
  font-size: clamp(3.6rem, 8vw, 7.5rem);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: -0.025em;
  color: var(--white);
  margin-bottom: 52px;
}

.contact-email {
  display: inline-block;
  font-size: clamp(0.95rem, 1.8vw, 1.35rem);
  font-weight: 300;
  color: var(--white);
  text-decoration: none;
  letter-spacing: 0.02em;
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
  padding-bottom: 4px;
  margin-bottom: 48px;
  transition: border-color 0.3s;
}

.contact-email:hover {
  border-color: rgba(255, 255, 255, 0.75);
}

.contact-socials {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 18px;
}

.contact-socials a {
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.4);
  transition: color 0.25s;
}

.contact-socials a:hover {
  color: var(--white);
}

.contact-socials span {
  color: rgba(255, 255, 255, 0.18);
  font-size: 0.9rem;
}

.contact-downloads {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
}

.contact-downloads a {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 100px;
  padding: 7px 18px;
  transition: color 0.25s, border-color 0.25s;
}

.contact-downloads a:hover {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.7);
}

/* ════════════════════════════════════════════════
   FOOTER
   ════════════════════════════════════════════════ */
footer {
  background-color: var(--black);
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  padding: 24px 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.22);
}

/* ════════════════════════════════════════════════
   INITIAL ANIMATION STATES
   GSAP will animate these to their natural values.
   .line-inner uses CSS because it must hide before JS loads.
   .js-reveal is set by GSAP immediately (no FOUC).
   ════════════════════════════════════════════════ */

/* Prevent hero text flash before GSAP runs */
.hero-eyebrow,
.hero-meta,
.hero-scroll-hint {
  opacity: 0;
}

/* ════════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════════ */
@media (max-width: 960px) {
  .project-inner,
  .project--alt .project-inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .project--alt .project-media { order: 0; }
  .project--alt .project-copy  { order: 0; }

  .about-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-media {
    position: static;
  }

  .img-placeholder--tall {
    aspect-ratio: 4 / 3;
  }
}

@media (max-width: 680px) {
  .nav-menu {
    gap: 22px;
  }

  .skills-grid {
    grid-template-columns: 1fr 1fr;
    gap: 44px 36px;
  }

  .stat-row {
    flex-direction: column;
    gap: 4px;
  }

  .stat-val {
    text-align: left;
  }
}

/* ── Hamburger button (hidden above 480px) ── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--black);
  border-radius: 2px;
  transition: transform 0.3s var(--ease-quint), opacity 0.3s;
  transform-origin: center;
}

.nav-hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ── Mobile dropdown menu ── */
.nav-mobile {
  display: none;
  flex-direction: column;
  position: absolute;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: saturate(180%) blur(22px);
  -webkit-backdrop-filter: saturate(180%) blur(22px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.07);
  padding: 20px 0 28px;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.3s var(--ease-quint), transform 0.3s var(--ease-quint);
  pointer-events: none;
}

.nav-mobile.is-open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.nav-mobile a {
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--black);
  padding: 14px 28px;
  transition: opacity 0.2s;
}

.nav-mobile a:hover {
  opacity: 0.5;
}

@media (max-width: 480px) {
  .nav-menu {
    display: none;
  }
  .nav-hamburger {
    display: flex;
  }
  .nav-mobile {
    display: flex;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .hero-name {
    font-size: clamp(3.8rem, 18vw, 5rem);
  }

  .logo-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
  }
}