:root {
  --bg: #0a0d14;
  --bg-2: #0d1220;
  --fg: #eef2f7;
  --muted: #7a869a;
  --border: #1d2230;
  --primary: #00d9ff;
  --primary-glow: #06b6d4;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'Space Grotesk', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}

body {
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(40, 60, 140, 0.35) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 50%, rgba(0, 120, 140, 0.18) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 10% 80%, rgba(30, 70, 140, 0.18) 0%, transparent 60%),
    var(--bg);
}

#particles {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.font-mono, .tag span, .role-text, .tech-label, .keycap span, .status, .socials span {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
}

/* Layout */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: 24px 16px;
}

.hero-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 32px;
  padding-bottom: 80px;
}

.hero-text { flex: 1; min-width: 0; width: 100%; }

/* Tag */
.tag span {
  font-size: 12px;
  color: rgba(0, 217, 255, 0.7);
  letter-spacing: 0.1em;
}

/* Title */
.title {
  margin-top: 14px;
  font-size: clamp(2.35rem, 8vw, 7.5rem);
  font-weight: 700;
  letter-spacing: -0.06em;
  line-height: 1.05;
  padding-bottom: 0.1em;
  text-shadow: 0 0 60px rgba(0, 217, 255, 0.3), 0 0 120px rgba(0, 217, 255, 0.1);
}

.gradient-text {
  display: inline-block;
  padding-bottom: 0.15em;
  padding-right: 0.05em;
  line-height: 1.1;
  background-image: linear-gradient(
    100deg,
    #f2f2f2 0%,
    #b8d4e8 30%,
    #00d9ff 60%,
    #4d9fff 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

/* Role */
.role {
  margin-top: 18px;
  display: flex;
  align-items: center;
  gap: 16px;
  justify-content: center;
}
.role .line {
  height: 1px; width: 40px;
  background: linear-gradient(to right, rgba(0,217,255,0.5), transparent);
}
.role-text {
  font-size: 11px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
}

/* Desc */
.desc {
  margin: 18px auto 0;
  max-width: 36rem;
  color: rgba(238, 242, 247, 0.6);
  font-size: 14px;
  line-height: 1.6;
}

/* Buttons */
.actions {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  max-width: 320px;
  padding: 12px 24px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--primary);
  color: #06121a;
  box-shadow: 0 0 20px rgba(0,217,255,0.3), 0 0 50px rgba(0,217,255,0.1);
}
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  color: rgba(238,242,247,0.85);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: rgba(0,217,255,0.4); color: #fff; }

/* Tech Stack — 3D keycaps */
.tech {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.tech-label {
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(238,242,247,0.4);
}
.keys {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  max-width: 340px;
  width: 100%;
  perspective: 1000px;
}

.keycap {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 72px;
  padding: 10px 6px;
  border-radius: 14px;
  background: linear-gradient(180deg, #1a1f2e 0%, #0e1320 100%);
  border: 1px solid #232838;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.06),
    inset 0 -3px 0 rgba(0,0,0,0.5),
    0 4px 0 #060914,
    0 6px 12px rgba(0,0,0,0.5);
  transition: transform 0.25s cubic-bezier(.2,.7,.2,1), box-shadow 0.3s ease, background 0.3s ease, border-color 0.3s ease;
  transform-style: preserve-3d;
  cursor: default;
}
.keycap::before {
  content: '';
  position: absolute;
  inset: 1px 1px 40% 1px;
  border-radius: 12px 12px 6px 6px;
  background: linear-gradient(180deg, rgba(255,255,255,0.08), transparent);
  pointer-events: none;
}
.keycap i {
  font-size: 18px;
  opacity: 0.75;
  transition: all 0.3s ease;
}
.keycap span {
  font-size: 9px;
  color: rgba(238,242,247,0.6);
  white-space: nowrap;
  transition: color 0.3s ease;
}
.keycap:hover {
  transform: translateY(-8px) scale(1.08) rotateX(-12deg) rotateY(8deg);
  background: linear-gradient(180deg, #232a3d 0%, #121726 100%);
  border-color: var(--key-color, var(--primary));
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.1),
    inset 0 -2px 0 rgba(0,0,0,0.4),
    0 10px 0 #060914,
    0 16px 28px rgba(0,0,0,0.6),
    0 0 32px color-mix(in srgb, var(--key-color, #06b6d4) 40%, transparent);
}
.keycap:hover i {
  opacity: 1;
  filter: drop-shadow(0 0 12px var(--key-color, #06b6d4));
  transform: scale(1.1);
}
.keycap:hover span { color: #fff; }
.keycap:active {
  transform: translateY(2px) scale(0.98);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.05),
    inset 0 -1px 0 rgba(0,0,0,0.3),
    0 2px 0 #060914,
    0 4px 8px rgba(0,0,0,0.5);
}

/* Footer */
.footer {
  position: absolute;
  left: 16px; right: 16px; bottom: 16px;
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 16px;
  border-top: 1px solid rgba(29,34,48,0.6);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.socials {
  display: flex;
  gap: 16px;
  align-items: center;
}
.socials a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(238,242,247,0.55);
  text-decoration: none;
  font-size: 16px;
  transition: color 0.2s ease;
}
.socials a:hover { color: #fff; }
.socials span {
  display: none;
  font-size: 11px;
  letter-spacing: 0.05em;
}
.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  color: rgba(238,242,247,0.5);
  letter-spacing: 0.05em;
}
.status .dot {
  width: 7px; height: 7px;
  border-radius: 999px;
  background: var(--primary);
  animation: pulse-anim 2s ease-in-out infinite;
}

@keyframes pulse-anim {
  0%, 100% { opacity: 1; transform: scale(1); box-shadow: 0 0 0 0 rgba(0,217,255,0.6); }
  50% { opacity: 0.6; transform: scale(0.85); box-shadow: 0 0 0 6px rgba(0,217,255,0); }
}

/* Entrance */
.fade-up {
  opacity: 0;
  transform: translateY(16px);
  animation: fadeUp 0.7s cubic-bezier(.2,.7,.2,1) forwards;
  animation-delay: var(--d, 0ms);
}
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* Tablet / Desktop */
@media (min-width: 640px) {
  .hero { padding: 32px 40px; }
  .tag span { font-size: 14px; }
  .role .line { width: 80px; }
  .role-text { font-size: 13px; letter-spacing: 0.3em; }
  .desc { font-size: 16px; }
  .actions { flex-direction: row; flex-wrap: wrap; gap: 14px; }
  .btn { width: auto; max-width: none; padding: 14px 28px; }
  .keys { max-width: 420px; gap: 16px; }
  .keycap { min-height: 92px; padding: 18px 24px; gap: 12px; border-radius: 18px; }
  .keycap i { font-size: 24px; }
  .keycap span { font-size: 11px; }
  .tech-label { font-size: 12px; }
  .footer { left: 40px; right: 40px; bottom: 32px; flex-direction: row; }
  .socials a:hover span { display: inline; }
}

@media (min-width: 1024px) {
  .hero { padding: 32px 64px; }
  .hero-inner {
    flex-direction: row;
    align-items: center;
    text-align: left;
    gap: 64px;
    padding-bottom: 100px;
  }
  .role { justify-content: flex-start; }
  .desc { margin-left: 0; margin-right: 0; max-width: 32rem; font-size: 18px; }
  .actions { justify-content: flex-start; }
  .tech { width: auto; }
  .keys { grid-template-columns: repeat(3, minmax(0, 1fr)); max-width: none; }
  .footer { left: 64px; right: 64px; }
}