/* =========
   Base
========= */

:root {
  --bg: #050505;
  --bg-alt: #0b0b0b;
  --fg: #fefefe;
  --muted: #a9a9a9;
  --accent: #ffffff;
  --border-subtle: #262626;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
  background-color: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  overflow-x: hidden;
}

/* scroll progress */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: var(--accent);
  z-index: 999;
}

/* cursor glow */
.cursor-glow {
  position: fixed;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 900;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(255,255,255,0.25) 0%, rgba(255,255,255,0) 60%);
  mix-blend-mode: screen;
  opacity: 0;
  transition: opacity 0.25s ease-out;
}

/* =========
   Animations
========= */

.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.7s cubic-bezier(0.33, 1, 0.68, 1),
    transform 0.7s cubic-bezier(0.33, 1, 0.68, 1);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.06s; }
.fade-in-delay-2 { transition-delay: 0.12s; }
.fade-in-delay-3 { transition-delay: 0.18s; }

@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

@keyframes card-breathe {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}

@keyframes tag-swipe {
  0% { transform: translateX(100%); opacity: 0; }
  60% { opacity: 1; }
  100% { transform: translateX(0); opacity: 1; }
}

@keyframes gradient-sweep {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* type-in for subtitle */
.type-in {
  overflow: hidden;
  display: inline-block;
}

/* =========
   Header
========= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 7vw;
  background: #050505;
  border-bottom: 1px solid var(--border-subtle);
}

.logo {
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-size: 0.8rem;
  background: linear-gradient(90deg, #ffffff, #777777, #ffffff);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: gradient-sweep 8s linear infinite;
}

.nav a {
  margin-left: 1.6rem;
  text-decoration: none;
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  position: relative;
}

.nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -0.3rem;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.16s ease-out;
}

.nav a:hover::after {
  width: 100%;
}

/* =========
   Hero
========= */

.hero {
  min-height: 80vh;
  padding: 5.2rem 7vw 4.2rem;
  display: flex;
  align-items: center;
  background: #050505;
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
  overflow: hidden;
  will-change: transform;
}

.hero-inner {
  width: 100%;
  max-width: 1040px;
  position: relative;
  z-index: 2;
}

/* snow only in hero */
#snow-canvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.hero-kicker {
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-size: 0.68rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 2fr);
  gap: 3rem;
}

/* gradient hero title */
.gradient-title {
  font-size: clamp(2.9rem, 6vw, 3.8rem);
  line-height: 1.02;
  margin: 0;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
}

.gradient-title-inner {
  display: inline-block;
  background: linear-gradient(90deg, #ffffff, #777777, #ffffff);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation:
    gradient-sweep 4s ease-in-out infinite,
    title-reveal 0.8s cubic-bezier(0.33, 1, 0.68, 1) forwards;
  transform: translateY(110%);
  opacity: 0;
}

@keyframes title-reveal {
  0% {
    transform: translateY(110%);
    opacity: 0;
  }
  100% {
    transform: translateY(0%);
    opacity: 1;
  }
}

.hero-subtitle {
  color: var(--muted);
  margin: 0 0 2rem;
  max-width: 30rem;
  font-size: 0.95rem;
}

.hero-side {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  font-size: 0.82rem;
}

.meta-label {
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.68rem;
  color: var(--muted);
}

.meta-value {
  display: block;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
}

/* =========
   Sections
========= */

.section {
  padding: 4.1rem 7vw;
  border-bottom: 1px solid var(--border-subtle);
  background: #050505;
}

.section:nth-of-type(even) {
  background: #0b0b0b;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1.6rem;
}

.section-header h2 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  background: linear-gradient(90deg, #ffffff, #777777, #ffffff);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: gradient-sweep 6s linear infinite;
}

.section-tag {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  position: relative;
  overflow: hidden;
}

.section-tag::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -0.15rem;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: translateX(100%);
}

.section-tag.tag-animate-visible::after {
  animation: tag-swipe 0.45s ease-out forwards;
}

.section p {
  max-width: 42rem;
  color: var(--muted);
  margin-top: 0;
}

.section-intro {
  max-width: 34rem;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 2fr);
  gap: 2.6rem;
}

.lead {
  font-size: 0.98rem;
}

/* =========
   Projects
========= */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.8rem;
  margin-top: 2rem;
}

.project-card {
  background: #050505;
  border-radius: 0.4rem;
  padding: 1.7rem 1.6rem 1.6rem;
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  animation: card-breathe 7s ease-in-out infinite;
  transition:
    transform 0.18s ease-out,
    border-color 0.18s ease-out,
    background 0.18s ease-out;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  background: #000;
}

.project-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.7rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.17em;
  color: var(--muted);
}

.project-tag {
  padding: 0.16rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
}

.project-year {
  font-size: 0.7rem;
}

.project-card h3 {
  margin: 0.5rem 0 0.7rem;
  font-size: 1.05rem;
}

.project-card p {
  margin: 0 0 1.2rem;
  color: var(--muted);
}

/* =========
   Skills
========= */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.8rem;
  margin-top: 1.6rem;
}

.skills-group h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  margin-bottom: 0.8rem;
}

.skills-group ul {
  list-style: none;
  padding: 0;
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.skills-group li + li {
  margin-top: 0.4rem;
}

/* =========
   Timeline
========= */

.timeline {
  margin-top: 1.6rem;
  border-left: 1px solid var(--border-subtle);
  padding-left: 1.3rem;
}

.timeline-item {
  position: relative;
  padding: 0.4rem 0 1.2rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -1.3rem;
  top: 0.5rem;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--accent);
}

.timeline-year {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  display: block;
  margin-bottom: 0.3rem;
}

/* =========
   Contact
========= */

.contact-list {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
}

.contact-list li {
  margin-bottom: 0.7rem;
  display: flex;
  gap: 0.9rem;
  align-items: baseline;
}

.contact-list span {
  min-width: 80px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
}

/* =========
   Links & buttons
========= */

.text-link {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 0.03rem;
  transition: border-color 0.15s ease-out, transform 0.15s ease-out;
}

.text-link:hover {
  border-bottom-color: var(--accent);
  transform: translateY(-1px);
}

.text-link.hero-link {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.text-link.small {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  position: relative;
}

.text-link.small::before {
  content: '↑';
  font-size: 0.7rem;
  position: absolute;
  left: -0.9rem;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.16s ease, transform 0.16s ease;
}

.text-link.small:hover::before {
  opacity: 1;
  transform: translateY(0);
}

.primary-btn {
  background: var(--accent);
  color: #000;
  border: 1px solid var(--accent);
  padding: 0.8rem 1.9rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  border-radius: 999px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  will-change: transform;
  transition:
    transform 0.15s ease-out,
    box-shadow 0.15s ease-out,
    background 0.15s ease-out;
}

.primary-btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(0,0,0,0.18);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.5s, height 0.5s;
}

.primary-btn:hover::after {
  width: 220px;
  height: 220px;
}

.primary-btn:hover {
  transform: translateY(-2px);
}

/* magnetic state */
.primary-btn.magnetic-active {
  transition: transform 0.08s ease-out;
}

.primary-btn:active {
  transform: translateY(0);
}

/* =========
   Footer
========= */

.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 1.8rem 7vw 2.2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  color: var(--muted);
  background-color: #050505;
}

/* =========
   Responsive
========= */

@media (max-width: 960px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 2.3rem;
  }

  .hero-meta {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .nav a {
    margin-left: 0;
    margin-right: 1.2rem;
  }

  .section {
    padding-inline: 6vw;
  }

  .two-column {
    grid-template-columns: 1fr;
  }

  .site-footer {
    flex-direction: column;
    gap: 0.8rem;
    align-items: flex-start;
  }
}