/* ─────────────────────────────────────────
   Design Tokens
───────────────────────────────────────── */
:root {
  --color-bg-dark:    #FFFFFF;
  --color-bg-light:   #F5F5F5;
  --color-card-bg:    #EBEBEB;
  --color-accent:     #FF4500;
  --color-text-dark:  #0D0D0D;
  --color-text-light: #0D0D0D;
  --color-muted:      rgba(13, 13, 13, 0.45);

  --font-display: 'Kanit', sans-serif;
  --font-body:    'Inter Tight', sans-serif;

  --text-hero:    clamp(4.5rem, 12vw, 11rem);
  --text-section: clamp(2.5rem, 5vw, 5rem);
  --text-contact: clamp(3rem, 8vw, 8rem);
  --text-body:    clamp(1rem, 1.15vw, 1.125rem);
  --text-label:   0.72rem;

  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  2rem;
  --space-lg:  4rem;
  --space-xl:  7rem;
  --space-xxl: 11rem;

  --ease-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast:  180ms;
  --dur-med:   380ms;
  --dur-slow:  650ms;

  --nav-h:     5rem;
  --max-w:     1400px;
  --pad-x:     clamp(1.5rem, 5vw, 4rem);
}

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

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

body {
  font-family: var(--font-body);
  background: var(--color-bg-dark);
  color: var(--color-text-dark);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul {
  list-style: none;
}

img, video {
  max-width: 100%;
  display: block;
}

.accent {
  color: var(--color-accent);
}

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

/* ─────────────────────────────────────────
   Navigation
───────────────────────────────────────── */
#site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--pad-x);
  z-index: 1000;
  transition:
    background var(--dur-med) var(--ease-expo),
    backdrop-filter var(--dur-med) var(--ease-expo),
    border-color var(--dur-med) var(--ease-expo);
  border-bottom: 1px solid transparent;
}

#site-nav.nav--solid {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: rgba(13, 13, 13, 0.08);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-accent);
  line-height: 1;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-links a {
  font-size: var(--text-label);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-left: 2.75rem;
  opacity: 0.55;
  transition: opacity var(--dur-fast);
  position: relative;
}


.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--dur-med) var(--ease-expo);
}

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

.nav-links a.is-active::after,
.nav-links a:hover::after {
  width: 100%;
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.nav-hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--color-text-dark);
  transition:
    transform var(--dur-med) var(--ease-expo),
    opacity var(--dur-fast);
}

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

/* ─────────────────────────────────────────
   Hero
───────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--nav-h) var(--pad-x) var(--space-lg);
  position: relative;
  overflow: hidden;
  background: var(--color-bg-dark);
}

/* Subtle dot grid texture */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(13,13,13,0.07) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

/* Large accent circle in background */
#hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  right: -10%;
  width: clamp(300px, 50vw, 700px);
  height: clamp(300px, 50vw, 700px);
  border-radius: 50%;
  border: 1px solid rgba(255, 69, 0, 0.15);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.9s var(--ease-expo), transform 0.9s var(--ease-expo);
}

.hero-inner.is-loaded {
  opacity: 1;
  transform: translateY(0);
}

.hero-eyebrow {
  font-size: var(--text-label);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}

.hero-name {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 600;
  line-height: 0.88;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  color: var(--color-text-dark);
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.hero-tagline {
  font-size: clamp(1rem, 1.8vw, 1.4rem);
  font-weight: 400;
  font-style: italic;
  color: var(--color-muted);
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
  letter-spacing: 0.01em;
}

.hero-cta {
  display: inline-block;
  font-size: var(--text-label);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  padding: 1rem 2.75rem;
  border: 1.5px solid rgba(13, 13, 13, 0.3);
  color: var(--color-text-dark);
  transition:
    background var(--dur-fast),
    border-color var(--dur-fast),
    color var(--dur-fast);
}

.hero-cta:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #FFFFFF;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  right: var(--pad-x);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-muted);
  z-index: 1;
}

.hero-scroll-line {
  width: 1px;
  height: 56px;
  background: linear-gradient(to bottom, rgba(13,13,13,0.4), transparent);
  animation: scrollPulse 2.2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { transform: scaleY(1); opacity: 0.5; }
  50%       { transform: scaleY(0.4); opacity: 1; }
}

/* ─────────────────────────────────────────
   Work
───────────────────────────────────────── */
#work {
  background: var(--color-bg-light);
  color: var(--color-text-dark);
  padding: var(--space-xxl) 0;
}

.section-header {
  margin-bottom: var(--space-lg);
}

.section-label {
  display: block;
  font-size: var(--text-label);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-section);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--color-text-dark);
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.project-card {
  position: relative;
  background: var(--color-card-bg);
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 4 / 5;
}

.card-color-block {
  height: 5px;
  width: 100%;
}

.project-card:nth-child(1) .card-color-block { background: var(--color-accent); }
.project-card:nth-child(2) .card-color-block { background: #1A1A3E; }
.project-card:nth-child(3) .card-color-block { background: #0D3B2E; }
.project-card:nth-child(4) .card-color-block { background: #2A0A0A; }
.project-card:nth-child(5) .card-color-block { background: var(--color-accent); }
.project-card:nth-child(6) .card-color-block { background: #1C1C1C; }

.card-inner {
  padding: 1.5rem;
  height: calc(100% - 5px);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  z-index: 1;
}

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

.card-number {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  opacity: 0.3;
  color: var(--color-text-dark);
}

.card-tag {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-accent);
}

.card-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.2vw, 1.9rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--color-text-dark);
  margin-top: var(--space-md);
}

.card-sub {
  font-size: 0.82rem;
  font-weight: 400;
  opacity: 0.5;
  margin-top: 0.3rem;
  color: var(--color-text-dark);
}

/* Hover overlay */
.card-hover {
  position: absolute;
  inset: 0;
  background: var(--color-text-dark);
  color: #FFFFFF;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity var(--dur-med) var(--ease-expo),
    transform var(--dur-med) var(--ease-expo);
  pointer-events: none;
}

.project-card:hover .card-hover {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.card-desc {
  font-size: 0.95rem;
  line-height: 1.65;
  opacity: 0.85;
  flex: 1;
  display: flex;
  align-items: center;
}

.card-link-label {
  font-size: var(--text-label);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-accent);
  margin-top: auto;
  padding-top: 1.5rem;
}

/* ─────────────────────────────────────────
   About
───────────────────────────────────────── */
#about {
  background: var(--color-bg-dark);
  color: var(--color-text-dark);
  padding: var(--space-xxl) 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 6vw, 7rem);
  align-items: start;
}

.about-left {
  position: sticky;
  top: calc(var(--nav-h) + 2rem);
}

.about-pullquote {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 2.6vw, 2.6rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.025em;
  color: var(--color-text-dark);
  border-left: 4px solid var(--color-accent);
  padding-left: 1.75rem;
  font-style: normal;
}

.about-right {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.about-title {
  font-family: var(--font-display);
  font-size: var(--text-section);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--color-accent);
}

.about-bio {
  font-size: var(--text-body);
  line-height: 1.8;
  color: var(--color-muted);
  max-width: 52ch;
}

.about-bio + .about-bio {
  margin-top: -2rem;
}

strong.highlight {
  font-family: var(--font-display);
  font-size: 1.05em;
  font-weight: 800;
  color: var(--color-text-dark);
}

.skills-label {
  font-size: var(--text-label);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.skills-list li {
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0.4rem 1rem;
  border: 1px solid rgba(13, 13, 13, 0.18);
  color: rgba(13, 13, 13, 0.65);
  transition:
    border-color var(--dur-fast),
    color var(--dur-fast);
}

.skills-list li:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ─────────────────────────────────────────
   Contact
───────────────────────────────────────── */
#contact {
  background: var(--color-bg-light);
  color: var(--color-text-dark);
  padding: var(--space-xxl) 0;
  text-align: center;
}

#contact .section-label {
  color: var(--color-accent);
}

.contact-cta {
  font-family: var(--font-display);
  font-size: var(--text-contact);
  font-weight: 800;
  line-height: 0.88;
  letter-spacing: -0.035em;
  text-transform: uppercase;
  color: var(--color-text-dark);
  margin: var(--space-md) 0 var(--space-lg);
}

.contact-email {
  display: inline-block;
  font-size: clamp(1rem, 1.8vw, 1.4rem);
  font-weight: 500;
  color: var(--color-text-dark);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 0.25rem;
  transition: color var(--dur-fast);
}

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

.contact-socials {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2.5rem;
  margin-top: var(--space-lg);
}

.social-link {
  font-size: var(--text-label);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-dark);
  opacity: 0.4;
  transition: opacity var(--dur-fast), color var(--dur-fast);
}

.social-link:hover {
  opacity: 1;
  color: var(--color-accent);
}

/* ─────────────────────────────────────────
   Footer
───────────────────────────────────────── */
#site-footer {
  background: var(--color-bg-dark);
  padding: 2rem 0;
  border-top: 1px solid rgba(13, 13, 13, 0.08);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-copy,
.footer-credit {
  font-size: var(--text-label);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(13, 13, 13, 0.35);
}

/* ─────────────────────────────────────────
   Scroll Reveal Animations
───────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition:
    opacity var(--dur-slow) var(--ease-expo),
    transform var(--dur-slow) var(--ease-expo);
}

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

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.6s var(--ease-expo),
    transform 0.6s var(--ease-expo);
}

.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 320ms; }
.reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 400ms; }

.reveal-stagger.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ─────────────────────────────────────────
   Responsive — Tablet ≤1024px
───────────────────────────────────────── */
@media (max-width: 1024px) {
  .work-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ─────────────────────────────────────────
   Responsive — Mobile ≤768px
───────────────────────────────────────── */
@media (max-width: 768px) {
  /* Nav: slide-in panel */
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 72vw;
    max-width: 320px;
    height: 100vh;
    background: #FFFFFF;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: var(--space-xl) var(--space-lg);
    gap: var(--space-md);
    transition: right var(--dur-med) var(--ease-expo);
    z-index: 999;
    border-left: 1px solid rgba(13,13,13,0.08);
  }

  .nav-links.is-open {
    right: 0;
  }

  .nav-links a {
    font-size: 1.4rem;
    letter-spacing: 0.06em;
    margin-left: 0;
    opacity: 0.7;
  }

  .nav-links a::after {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  /* Work: single column */
  .work-grid {
    grid-template-columns: 1fr;
  }

  .project-card {
    aspect-ratio: 16 / 9;
  }

  /* About: stack */
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .about-left {
    position: static;
  }

  /* Spacing reduction */
  #work,
  #about,
  #contact {
    padding: var(--space-xl) 0;
  }
}

/* ─────────────────────────────────────────
   Responsive — Small Mobile ≤480px
───────────────────────────────────────── */
@media (max-width: 480px) {
  .hero-cta {
    padding: 0.875rem 2rem;
  }

  .contact-socials {
    flex-direction: column;
    gap: 1.25rem;
  }

  .project-card {
    aspect-ratio: 4 / 3;
  }
}