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

:root {
  --white: #ffffff;
  --black: #000000;
  --gray-100: #f7f7f7;
  --gray-200: #eeeeee;
  --gray-400: #aaaaaa;
  --gray-600: #666666;
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  --ease-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

html {
  scroll-behavior: smooth;
  background: var(--white);
}

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

/* ─────────────────────────────────────────
   NAVIGATION
───────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 48px;
  height: 72px;
  display: flex;
  align-items: center;
  transition: background 0.4s var(--ease-smooth), backdrop-filter 0.4s var(--ease-smooth);
}

#navbar.scrolled {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

.nav-inner {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.03em;
  color: var(--black);
  text-decoration: none;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 40px;
}

.nav-links a {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--black);
  text-decoration: none;
  opacity: 0.5;
  transition: opacity 0.25s ease;
}

.nav-links a:hover { opacity: 1; }

/* ─────────────────────────────────────────
   HERO SCROLL SECTION
───────────────────────────────────────── */
.hero-scroll-wrapper {
  /* 300vh = 3× viewport height for scroll duration */
  height: 300vh;
  position: relative;
}

.hero-sticky {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--white);
}

.hero-canvas-wrap {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform-origin: center center;
  will-change: transform;
}

#heroCanvas {
  display: block;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  /* Canvas is drawn to from JS — no CSS filter */
}

/* Subtle text overlay — fades out as scroll progresses */
.hero-text-overlay {
  position: absolute;
  bottom: 64px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  pointer-events: none;
}

.hero-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--black);
  opacity: 0.35;
  transition: opacity 0.3s ease;
}

/* Bottom dissolve — dissolves silhouette into the black section below */
.hero-bottom-fade {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 62%;                  /* covers lower ~62% of viewport height */
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0)    0%,
    rgba(0, 0, 0, 0)    18%,
    rgba(0, 0, 0, 0.06) 32%,
    rgba(0, 0, 0, 0.22) 50%,
    rgba(0, 0, 0, 0.60) 72%,
    rgba(0, 0, 0, 0.88) 88%,
    #000000             100%
  );
  pointer-events: none;
  z-index: 2;   /* above canvas, below scroll indicator */
}

/* Scroll indicator */
.hero-sticky::after {
  content: '';
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 40px;
  background: var(--black);
  opacity: 0.15;
  animation: scrollPulse 2.4s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.15; transform: translateX(-50%) scaleY(1); }
  50% { opacity: 0.4; transform: translateX(-50%) scaleY(1.3); }
}

/* Solid black seam — zero-gradient connector between hero and dark sections */
.section-fade-dark {
  height: 2px;
  background: #000000;
}

/* ─────────────────────────────────────────
   INTRO SECTION  —  dark
───────────────────────────────────────── */
.intro-section {
  padding: 160px 48px;
  background: #000000;
}

.intro-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.intro-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 6px 14px;
  margin-bottom: 52px;
}

.intro-headline {
  font-family: var(--font-serif);
  font-size: clamp(48px, 7vw, 96px);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin-bottom: 0;
}

.intro-headline em {
  font-style: italic;
  color: rgba(255,255,255,0.6);
}

/* ─────────────────────────────────────────
   PROJECTS SECTION  —  dark
───────────────────────────────────────── */
.projects-section {
  padding: 0 48px 160px;
  background: #000000;
}

.projects-inner {
  max-width: 1000px;   /* mirrors intro-inner — keeps left edge aligned */
  margin: 0 auto;
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: 32px;
  margin-bottom: 72px;
}

.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.25);
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1;
  color: #ffffff;
}

/* ── HORIZONTAL PROJECT LIST ── */
.projects-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ── PROJECT CARD — horizontal layout ── */
.proj-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 40px 52px;
  background: #0a0a0a;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 14px;
  cursor: pointer;
  outline: none;
  position: relative;
  overflow: hidden;
  transition:
    transform     0.75s cubic-bezier(0.22, 1, 0.36, 1),
    background    0.65s ease,
    border-color  0.65s ease,
    box-shadow    0.75s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform;
}

/* Inner glow — barely visible, activates on hover */
.proj-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    ellipse 110% 80% at 50% 140%,
    rgba(255, 255, 255, 0.025) 0%,
    transparent 65%
  );
  opacity: 0;
  transition: opacity 0.75s ease;
  pointer-events: none;
}

.proj-card:hover,
.proj-card:focus-visible {
  transform: scale(1.008);
  background: #0f0f0f;
  border-color: rgba(255, 255, 255, 0.11);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.03),
    0 24px 70px rgba(0, 0, 0, 0.45),
    0 6px 28px rgba(255, 255, 255, 0.015);
}

.proj-card:hover::before,
.proj-card:focus-visible::before { opacity: 1; }

/* LEFT SIDE */
.proj-card-left {
  display: flex;
  align-items: center;
  gap: 28px;
  flex: 1;
  min-width: 0;
}

.proj-index {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.15);
  flex-shrink: 0;
  width: 20px;
  text-align: right;
}

.proj-info { min-width: 0; }

.proj-title {
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.4vw, 30px);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.15;
  color: #ffffff;
  margin-bottom: 10px;
  transition: color 0.4s ease;
}

.proj-meta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.proj-category {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: #a0a0a0;
}

.proj-dot {
  display: inline-block;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  flex-shrink: 0;
}

.proj-year {
  font-size: 12px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.25);
}

/* RIGHT SIDE — action buttons */
.proj-card-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.proj-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 11px 22px;
  border-radius: 40px;
  white-space: nowrap;
  transition:
    background    0.35s ease,
    border-color  0.35s ease,
    color         0.35s ease,
    box-shadow    0.35s ease,
    transform     0.3s ease;
}

.proj-btn svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* Preview */
.proj-btn--preview {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.75);
}

.proj-btn--preview:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.22);
  color: #ffffff;
  box-shadow: 0 0 18px rgba(255, 255, 255, 0.07);
  transform: translateY(-1px);
}

/* GitHub */
.proj-btn--github {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.5);
}

.proj-btn--github:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.28);
  color: rgba(255, 255, 255, 0.85);
  transform: translateY(-1px);
}

/* Card  —  dark surface */
.project-card {
  background: #0c0c0c;
  border: none;                      /* grid gap acts as border */
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.55s var(--ease-out),
              background 0.4s ease,
              box-shadow 0.55s var(--ease-out);
  outline: none;
  padding: 0;
}

.project-card:hover,
.project-card:focus {
  background: #141414;
  transform: scale(1.025);
  box-shadow:
    0 0  0   1px rgba(255,255,255,0.07),
    0 24px 56px rgba(0,0,0,0.6);
  z-index: 1;
  position: relative;               /* lets scale pop above siblings */
}

/* Image area */
.card-image-wrap {
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.card-image-placeholder {
  width: 100%;
  height: 100%;
  background: #161616;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.7s var(--ease-out), filter 0.4s ease;
}

.project-card:hover .card-image-placeholder {
  transform: scale(1.04);
  filter: brightness(1.12);
}

.placeholder-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.12);
}

/* Card body */
.card-body {
  padding: 32px 36px 40px;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.card-tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 4px 10px;
}

.card-year {
  font-size: 12px;
  font-weight: 400;
  color: rgba(255,255,255,0.2);
}

.card-title {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: #ffffff;
  margin-bottom: 12px;
}

.card-desc {
  font-size: 15px;
  font-weight: 300;
  line-height: 1.7;
  color: rgba(255,255,255,0.38);
  margin-bottom: 28px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,255,255,0.2);
  padding-bottom: 2px;
  transition: gap 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.card-link svg {
  width: 16px;
  height: 16px;
  transition: transform 0.25s ease;
}

.card-link:hover {
  gap: 14px;
  color: #ffffff;
  border-color: rgba(255,255,255,0.5);
}
.card-link:hover svg { transform: translate(2px, -2px); }

/* ─────────────────────────────────────────
   CONTACT / CTA SECTION
───────────────────────────────────────── */
.contact-section {
  padding: 160px 48px;
  background: var(--black);
}

.contact-inner {
  max-width: 900px;
  margin: 0 auto;
}

.contact-section .section-label {
  color: rgba(255,255,255,0.3);
  display: block;
  margin-bottom: 32px;
}

.contact-headline {
  font-family: var(--font-serif);
  font-size: clamp(40px, 6vw, 84px);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--white);
  margin-bottom: 64px;
}

/* CTA Button */
.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 20px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--black);
  background: var(--white);
  text-decoration: none;
  padding: 20px 36px;
  transition: gap 0.3s var(--ease-smooth), background 0.3s ease, color 0.3s ease;
  position: relative;
  overflow: hidden;
}

.cta-button::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--black);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-smooth);
}

/* Invert colors on hover using the sliding fill */
.cta-button:hover {
  color: var(--white);
  gap: 30px;
}

.cta-button:hover::before { transform: scaleX(1); }

.cta-button span, .cta-arrow {
  position: relative;
  z-index: 1;
}

.cta-arrow {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
}

.cta-arrow svg {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
}

.cta-button:hover .cta-arrow svg { transform: translateX(4px); }

/* ─────────────────────────────────────────
   FOOTER
───────────────────────────────────────── */
.site-footer {
  padding: 64px 48px;
  background: var(--black);
  border-top: 1px solid rgba(255,255,255,0.08);
}

.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 40px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
}

.footer-tagline {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
}

.footer-links {
  display: flex;
  gap: 32px;
}

.footer-link {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-link:hover { color: var(--white); }

.footer-copy {
  font-size: 11px;
  color: rgba(255,255,255,0.2);
  text-align: right;
}

/* ─────────────────────────────────────────
   PAGE FADE IN
───────────────────────────────────────── */
@keyframes pageFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

body { animation: pageFadeIn 0.8s var(--ease-out) both; }

/* ─────────────────────────────────────────
   SCROLL-REVEAL UTILITY
───────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─────────────────────────────────────────
   RESPONSIVE — TABLET  (≤ 900px)
───────────────────────────────────────── */
@media (max-width: 900px) {
  #navbar { padding: 0 24px; }

  .intro-section,
  .projects-section,
  .contact-section,
  .site-footer { padding-left: 24px; padding-right: 24px; }

  /* Stack proj-cards vertically on tablet */
  .proj-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
    padding: 28px 28px;
  }

  .proj-card-right {
    width: 100%;
    justify-content: flex-start;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-links { justify-content: center; }
  .footer-copy  { text-align: center; }
  .footer-brand { align-items: center; }
}

/* ─────────────────────────────────────────
   RESPONSIVE — MOBILE  (≤ 768px)
   ONLY affects mobile; desktop untouched
───────────────────────────────────────── */
@media (max-width: 768px) {

  /* ── NAVBAR ── */
  #navbar {
    padding: 0 20px;
    height: 60px;
  }

  .nav-links { display: none; }

  .nav-brand {
    font-size: 16px;
  }

  /* ── HERO — full-screen cinematic canvas ── */
  .hero-scroll-wrapper {
    /* Keep 300vh scroll duration intact */
    height: 300vh;
  }

  .hero-sticky {
    height: 100vh;
    height: 100svh; /* use small-viewport-height on mobile browsers */
    overflow: hidden;
    background: var(--white);
  }

  /* Canvas wrapper fills the full sticky viewport */
  .hero-canvas-wrap {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: flex-start;   /* bias upward — keeps face in frame */
    justify-content: center;
    transform-origin: center 30%;  /* zoom anchored to upper-centre */
  }

  /* Canvas stretches to fill screen; object-position keeps face visible */
  #heroCanvas {
    width: 100%;
    height: 100%;
    max-width: none;
    max-height: none;
    object-fit: cover;
    object-position: center 15%;  /* bias 15% from top — face stays centred */
  }

  /* Label — smaller, sits just above the bottom fade */
  .hero-text-overlay {
    bottom: 80px;
  }

  .hero-label {
    font-size: 9px;
    letter-spacing: 0.2em;
  }

  /* Gradient fade — softened on mobile for seamless black transition */
  .hero-bottom-fade {
    height: 55%;
    background: linear-gradient(
      to bottom,
      rgba(0,0,0,0)    0%,
      rgba(0,0,0,0)    15%,
      rgba(0,0,0,0.04) 28%,
      rgba(0,0,0,0.18) 45%,
      rgba(0,0,0,0.55) 68%,
      rgba(0,0,0,0.86) 86%,
      #000000          100%
    );
  }

  /* Scroll indicator — hide on mobile to reduce clutter */
  .hero-sticky::after {
    display: none;
  }

  /* ── INTRO SECTION ── */
  .intro-section {
    padding: 80px 20px 80px;
  }

  .intro-headline {
    font-size: clamp(36px, 11vw, 60px);
    line-height: 1.08;
    letter-spacing: -0.02em;
  }

  /* ── PROJECTS SECTION ── */
  .projects-section {
    padding: 0 20px 100px;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 40px;
  }

  .section-title {
    font-size: clamp(32px, 9vw, 52px);
  }

  /* Cards: vertical stack, touch-friendly */
  .proj-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    padding: 24px 20px;
    border-radius: 12px;
    /* Tap feedback — replaces hover on touch devices */
    -webkit-tap-highlight-color: transparent;
    transition:
      transform     0.3s cubic-bezier(0.22, 1, 0.36, 1),
      background    0.3s ease,
      border-color  0.3s ease,
      box-shadow    0.3s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .proj-card:active {
    transform: scale(1.012);
    background: #0f0f0f;
    border-color: rgba(255,255,255,0.14);
    box-shadow:
      0 0 0 1px rgba(255,255,255,0.04),
      0 16px 48px rgba(0,0,0,0.5),
      0 4px 20px rgba(255,255,255,0.02);
  }

  .proj-card-left {
    gap: 16px;
    width: 100%;
  }

  .proj-card-right {
    width: 100%;
    justify-content: flex-start;
    gap: 10px;
  }

  /* ── PROJECT BUTTONS — touch-friendly ── */
  .proj-btn {
    min-height: 44px;
    padding: 0 18px;
    font-size: 11px;
    letter-spacing: 0.08em;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    -webkit-tap-highlight-color: transparent;
  }

  .proj-btn svg {
    width: 13px;
    height: 13px;
  }

  .proj-title {
    font-size: clamp(18px, 5vw, 26px);
  }

  /* ── CONTACT SECTION ── */
  .contact-section {
    padding: 100px 20px;
  }

  .contact-headline {
    font-size: clamp(32px, 10vw, 56px);
    margin-bottom: 48px;
  }

  .cta-button {
    width: 100%;
    justify-content: center;
    padding: 18px 28px;
    min-height: 56px;
  }

  /* ── FOOTER ── */
  .site-footer {
    padding: 48px 20px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    text-align: center;
  }

  .footer-brand  { align-items: center; }
  .footer-links  { justify-content: center; flex-wrap: wrap; gap: 20px; }
  .footer-copy   { text-align: center; }

  .footer-name    { font-size: 15px; }
  .footer-tagline { font-size: 10px; }
}