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

:root {
  --bg:        #060809;
  --bg2:       #0d1114;
  --fg:        #e8edf2;
  --fg-dim:    #6b7a86;
  --cyan:      #00f5ff;
  --lime:      #a8ff3e;
  --violet:    #b44dff;
  --font-display: 'Space Grotesk', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

html { scroll-behavior: smooth; cursor: none; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-display);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--cyan); color: var(--bg); }

/* ═══════════════════════════════
   CUSTOM CURSOR
═══════════════════════════════ */
#cursor-dot,
#cursor-ring {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s;
}
#cursor-dot {
  width: 6px; height: 6px;
  background: var(--cyan);
}
#cursor-ring {
  width: 36px; height: 36px;
  border: 1.5px solid var(--cyan);
  opacity: 0.4;
  transition: width 0.25s var(--ease-out-expo),
              height 0.25s var(--ease-out-expo),
              opacity 0.25s,
              border-color 0.25s;
}
body.cursor-hover #cursor-ring {
  width: 56px; height: 56px;
  opacity: 0.8;
  border-color: var(--cyan);
}
body.cursor-click #cursor-dot { transform: translate(-50%,-50%) scale(2.5); }

/* ═══════════════════════════════
   NAVBAR
═══════════════════════════════ */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 3rem;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(6, 8, 9, 0.7);
  border-bottom: 1px solid rgba(255,255,255,0.04);
  transition: background 0.3s;
}
#navbar .logo {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--cyan);
  letter-spacing: 0.08em;
}
#navbar nav { display: flex; gap: 2.5rem; }
#navbar nav a {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--fg-dim);
  text-decoration: none;
  position: relative;
  transition: color 0.2s;
}
#navbar nav a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 100%;
  height: 1px;
  background: var(--cyan);
  transition: right 0.3s var(--ease-out-expo);
}
#navbar nav a.active,
#navbar nav a:hover { color: var(--fg); }
#navbar nav a.active::after,
#navbar nav a:hover::after { right: 0; }

/* ═══════════════════════════════
   SECTION COMMON
═══════════════════════════════ */
section { position: relative; }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
  opacity: 0.7;
  margin-bottom: 1rem;
}

/* ═══════════════════════════════
   HERO
═══════════════════════════════ */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 3rem;
  overflow: hidden;
  position: relative;
}

/* Grid background */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,245,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,245,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
}

/* Glow blob */
#hero::after {
  content: '';
  position: absolute;
  top: 20%; left: 55%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(0,245,255,0.07) 0%, transparent 70%);
  pointer-events: none;
  animation: blobPulse 6s ease-in-out infinite;
}
@keyframes blobPulse {
  0%, 100% { transform: scale(1) translate(0,0); opacity: 0.8; }
  50% { transform: scale(1.15) translate(-30px, 20px); opacity: 1; }
}

.hero-inner { position: relative; z-index: 1; max-width: 1200px; }

.hero-pretitle {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--cyan);
  letter-spacing: 0.2em;
  margin-bottom: 1.5rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s var(--ease-out-expo) 0.2s forwards;
}

.hero-name {
  font-size: clamp(72px, 12vw, 160px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.03em;
  opacity: 0;
  transform: translateY(40px);
  animation: fadeUp 1s var(--ease-out-expo) 0.4s forwards;
}

.hero-name .line2 {
  display: block;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(232,237,242,0.25);
  transition: -webkit-text-stroke 0.3s;
}
#hero:hover .hero-name .line2 {
  -webkit-text-stroke-color: var(--cyan);
}

.hero-tagline {
  margin-top: 2.5rem;
  font-size: clamp(1rem, 2vw, 1.4rem);
  font-weight: 300;
  color: var(--fg-dim);
  max-width: 560px;
  line-height: 1.6;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.9s var(--ease-out-expo) 0.7s forwards;
}

.hero-tagline em {
  font-style: normal;
  color: var(--fg);
  font-weight: 500;
}

.hero-cta {
  margin-top: 3.5rem;
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 2.2rem;
  border: 1.5px solid var(--cyan);
  color: var(--cyan);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s var(--ease-out-expo) 1s forwards;
  transition: color 0.3s;
}
.hero-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--cyan);
  transform: translateX(-102%);
  transition: transform 0.4s var(--ease-out-expo);
}
.hero-cta:hover { color: var(--bg); }
.hero-cta:hover::before { transform: translateX(0); }
.hero-cta span { position: relative; z-index: 1; }
.hero-cta .arrow {
  position: relative; z-index: 1;
  transition: transform 0.3s var(--ease-out-expo);
}
.hero-cta:hover .arrow { transform: translateX(6px); }

.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 3rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--fg-dim);
  writing-mode: vertical-rl;
  display: flex;
  align-items: center;
  gap: 1rem;
  opacity: 0;
  animation: fadeUp 1s var(--ease-out-expo) 1.4s forwards;
}
.hero-scroll::before {
  content: '';
  width: 1px; height: 60px;
  background: linear-gradient(to bottom, transparent, var(--fg-dim));
}

/* ═══════════════════════════════
   DIAGONAL SEPARATOR
═══════════════════════════════ */
.sep-diagonal {
  position: relative;
  height: 80px;
  overflow: hidden;
  margin-top: -1px;
}
.sep-diagonal svg { display: block; width: 100%; height: 100%; }

/* ═══════════════════════════════
   PROJECTS
═══════════════════════════════ */
#projects {
  background: var(--bg);
  padding: 7rem 3rem;
}

.projects-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 4rem;
  gap: 2rem;
}

.projects-title {
  font-size: clamp(2.5rem, 5vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.projects-count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-dim);
  letter-spacing: 0.1em;
  padding-bottom: 0.5rem;
}

/* Bento Grid */
.bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-template-rows: auto;
  gap: 1rem;
}

.bento-card {
  position: relative;
  overflow: hidden;
  background: var(--bg2);
  border: 1px solid rgba(255,255,255,0.06);
  padding: 2rem;
  transition: border-color 0.3s, transform 0.05s linear;
  will-change: transform;
}

/* Card layout variants */
.bento-card:nth-child(1) { grid-column: span 7; min-height: 380px; }
.bento-card:nth-child(2) { grid-column: span 5; min-height: 380px; }
.bento-card:nth-child(3) { grid-column: span 4; min-height: 280px; }
.bento-card:nth-child(4) { grid-column: span 4; min-height: 280px; }
.bento-card:nth-child(5) { grid-column: span 4; min-height: 280px; }

.bento-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,245,255,0.06), transparent 60%);
  opacity: 0;
  transition: opacity 0.4s;
}
.bento-card:hover { border-color: rgba(0,245,255,0.3); }
.bento-card:hover::before { opacity: 1; }

/* Card placeholder visual */
.card-visual {
  width: 100%;
  height: 160px;
  background: #000;
  border: 1px dashed rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: rgba(255,255,255,0.15);
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
  position: relative;
  overflow: hidden;
}
.card-visual img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  position: absolute;
  inset: 0;
  z-index: 1;
}
.bento-card:nth-child(1) .card-visual,
.bento-card:nth-child(2) .card-visual { 
  height: 280px; 
  border: 1px solid rgba(255,255,255,0.03);
}

.card-visual-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,245,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,245,255,0.04) 1px, transparent 1px);
  background-size: 24px 24px;
}
.card-visual-dot {
  position: absolute;
  width: 40px; height: 40px;
  border: 1.5px solid rgba(0,245,255,0.2);
  border-radius: 50%;
  animation: spinDot 8s linear infinite;
}
.card-visual-dot::after {
  content: '';
  position: absolute;
  top: -4px; left: 50%;
  transform: translateX(-50%);
  width: 6px; height: 6px;
  background: var(--cyan);
  border-radius: 50%;
}
@keyframes spinDot { to { transform: rotate(360deg); } }

.card-number {
  position: absolute;
  top: 1.5rem; right: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--fg-dim);
  opacity: 0.4;
}

.card-title {
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}
.bento-card:nth-child(1) .card-title { font-size: 1.8rem; }

.card-desc {
  font-size: 0.82rem;
  color: var(--fg-dim);
  line-height: 1.6;
  margin-bottom: 1.2rem;
  max-width: 400px;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.6rem;
  border-radius: 2px;
  text-transform: uppercase;
}
.tag.frontend  { background: rgba(0,245,255,0.1);  color: var(--cyan);   }
.tag.backend   { background: rgba(180,77,255,0.12); color: var(--violet); }
.tag.database  { background: rgba(168,255,62,0.1);  color: var(--lime);   }
.tag.tool      { background: rgba(255,255,255,0.07);color: var(--fg-dim); }

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  text-decoration: none;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.3s, transform 0.3s, gap 0.2s;
}
.bento-card:hover .card-link { opacity: 1; transform: translateY(0); }
.card-link::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 10;
}
.card-link:hover { gap: 0.9rem; }

/* ═══════════════════════════════
   STACK
═══════════════════════════════ */
#stack {
  background: var(--bg2);
  padding: 7rem 3rem;
  position: relative;
  overflow: hidden;
}
#stack::before {
  content: '';
  position: absolute;
  bottom: -100px; right: -100px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(180,77,255,0.05), transparent 70%);
}

.stack-header {
  margin-bottom: 4rem;
}
.stack-title {
  font-size: clamp(2.5rem, 5vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.stack-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.stack-group {
  border: 1px solid rgba(255,255,255,0.06);
  padding: 1.8rem;
}

.stack-group-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.stack-group:nth-child(1) .stack-group-label { color: var(--cyan); }
.stack-group:nth-child(2) .stack-group-label { color: var(--violet); }
.stack-group:nth-child(3) .stack-group-label { color: var(--lime); }
.stack-group:nth-child(4) .stack-group-label { color: #ff9d5c; }

.stack-items { display: flex; flex-direction: column; gap: 0.8rem; }

.stack-item {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.9rem;
  font-weight: 500;
  opacity: 0;
  transform: translateX(-16px);
  transition: opacity 0.5s, transform 0.5s var(--ease-out-expo);
}
.stack-item.visible { opacity: 1; transform: translateX(0); }

.stack-item-icon {
  width: 32px; height: 32px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.5rem;
  letter-spacing: 0;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
}

.stack-item-bar {
  height: 2px;
  background: rgba(255,255,255,0.06);
  flex: 1;
  position: relative;
  overflow: hidden;
}
.stack-item-bar::after {
  content: '';
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  transition: transform 1.2s var(--ease-out-expo) var(--delay, 0s);
}
.stack-item.visible .stack-item-bar::after { transform: translateX(0); }
.stack-group:nth-child(1) .stack-item-bar::after { background: var(--cyan); }
.stack-group:nth-child(2) .stack-item-bar::after { background: var(--violet); }
.stack-group:nth-child(3) .stack-item-bar::after { background: var(--lime); }
.stack-group:nth-child(4) .stack-item-bar::after { background: #ff9d5c; }

/* ═══════════════════════════════
   ABOUT
═══════════════════════════════ */
#about {
  background: var(--bg);
  padding: 7rem 3rem;
  overflow: hidden;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: center;
}

.about-left {}

.about-title {
  font-size: clamp(2.5rem, 5vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 2rem;
}

.about-text {
  font-size: 1rem;
  color: var(--fg-dim);
  line-height: 1.8;
  margin-bottom: 1.2rem;
}
.about-text em {
  font-style: normal;
  color: var(--fg);
  font-weight: 500;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
  padding-top: 3rem;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.stat-value {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--cyan);
  line-height: 1;
}
.stat-label {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  color: var(--fg-dim);
  text-transform: uppercase;
  margin-top: 0.4rem;
}

/* Right column — decorative code block */
.about-right { position: relative; }

.about-code-wrap {
  position: relative;
}
.about-code-wrap::before {
  content: '';
  position: absolute;
  top: -20px; left: -20px; right: 20px; bottom: 20px;
  border: 1px solid rgba(0,245,255,0.1);
  pointer-events: none;
}

.about-code {
  background: var(--bg2);
  border: 1px solid rgba(255,255,255,0.06);
  padding: 2rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.9;
  position: relative;
}

.about-code-bar {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.about-code-bar span {
  width: 10px; height: 10px; border-radius: 50%;
}
.about-code-bar span:nth-child(1) { background: #ff5f56; }
.about-code-bar span:nth-child(2) { background: #ffbd2e; }
.about-code-bar span:nth-child(3) { background: #27c93f; }

.code-ln { color: rgba(255,255,255,0.15); user-select: none; margin-right: 1.5rem; }
.code-kw  { color: var(--violet); }
.code-str { color: var(--lime); }
.code-fn  { color: var(--cyan); }
.code-cm  { color: rgba(255,255,255,0.25); }
.code-prop { color: #ffbd5e; }

/* ═══════════════════════════════
   FOOTER
═══════════════════════════════ */
#footer {
  background: var(--bg2);
  padding: 5rem 3rem 3rem;
  position: relative;
  overflow: hidden;
  border-top: 1px solid rgba(255,255,255,0.04);
}

.footer-big {
  font-size: clamp(3rem, 7vw, 8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 0.95;
  margin-bottom: 3rem;
  color: rgba(255,255,255,0.06);
}

.footer-email-wrap {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.footer-email {
  font-size: clamp(1rem, 2.5vw, 1.8rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--fg);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-email:hover { color: var(--cyan); }

#copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border: 1px solid rgba(255,255,255,0.1);
  background: transparent;
  color: var(--fg-dim);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: none;
  transition: all 0.2s;
}
#copy-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}
#copy-btn.copied {
  border-color: var(--lime);
  color: var(--lime);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.04);
}
.footer-bottom p {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--fg-dim);
  letter-spacing: 0.1em;
}

/* ═══════════════════════════════
   SCROLL REVEAL
═══════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.8s var(--ease-out-expo), transform 0.8s var(--ease-out-expo);
}
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ═══════════════════════════════
   ANIMATIONS
═══════════════════════════════ */
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════
   RESPONSIVE
═══════════════════════════════ */
@media (max-width: 1024px) {
  .stack-grid { grid-template-columns: repeat(2, 1fr); }
  .bento-card:nth-child(1) { grid-column: span 12; }
  .bento-card:nth-child(2) { grid-column: span 12; }
  .bento-card:nth-child(3) { grid-column: span 6; }
  .bento-card:nth-child(4) { grid-column: span 6; }
  .bento-card:nth-child(5) { grid-column: span 12; }
  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
}

@media (max-width: 768px) {
  html { cursor: auto; }
  #cursor-dot, #cursor-ring { display: none; }
  #navbar { padding: 1rem 1.5rem; }
  #navbar nav { gap: 1.5rem; }
  #hero, #projects, #stack, #about, #footer { padding-left: 1.5rem; padding-right: 1.5rem; }
  .hero-scroll { display: none; }
  .stack-grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
  .bento-card:nth-child(3),
  .bento-card:nth-child(4) { grid-column: span 12; }
  .about-stats { grid-template-columns: repeat(3, 1fr); gap: 1rem; }
  .projects-header { flex-direction: column; align-items: flex-start; }
  .footer-email-wrap { flex-wrap: wrap; }
}