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

:root {
  /* ── Day palette ── */
  --sky-top:      #0d7abf;
  --sky-mid:      #4db8e8;
  --sky-bot:      #fde8a0;
  --ocean-top:    #0da8be;
  --ocean-mid:    #0882a0;
  --ocean-bot:    #055e78;
  --sand-top:     #f8e070;
  --sand-mid:     #e8c040;
  --sand-bot:     #c8a020;
  --horizon-glow: rgba(255,200,80,0.55);
  --foam:         rgba(255,255,255,0.70);

  --surface:      rgba(255,252,240,0.88);
  --surface-card: rgba(255,250,235,0.94);
  --border:       rgba(140,100,40,0.16);
  --text:         #0e0c08;
  --text-muted:   #584520;
  --accent:       #0990a8;
  --accent-soft:  rgba(9,144,168,0.10);
  --tag-bg:       rgba(9,144,168,0.08);
  --tag-text:     #076e80;
  --nav-bg:       rgba(255,250,225,0.80);
  --chip-accent-bg:   #0990a8;
  --chip-accent-text: #fff;
  --label-color:  rgba(255, 255, 255, 0.92);

  --font-sans: 'Inter', system-ui, sans-serif;
  --font-head: 'Space Grotesk', system-ui, sans-serif;
  --radius:    12px;
  --radius-sm: 8px;
  --ease:      cubic-bezier(0.4, 0, 0.2, 1);
  --trans:     0.22s var(--ease);
}

[data-theme="dark"] {
  /* ── Night palette ── */
  --sky-top:      #000510;
  --sky-mid:      #07163a;
  --sky-bot:      #122060;
  --ocean-top:    #040e28;
  --ocean-mid:    #020a18;
  --ocean-bot:    #01060e;
  --sand-top:     #120e04;
  --sand-mid:     #0a0802;
  --sand-bot:     #060400;
  --horizon-glow: rgba(0, 60, 160, 0.55);
  --foam:         rgba(0, 180, 255, 0.07);

  --surface:      rgba(4, 8, 22, 0.85);
  --surface-card: rgba(8, 14, 34, 0.88);
  --border:       rgba(0, 200, 255, 0.09);
  --text:         #ddeeff;
  --text-muted:   #7899bb;
  --accent:       #00e5ff;
  --accent-soft:  rgba(0, 229, 255, 0.07);
  --tag-bg:       rgba(0, 229, 255, 0.06);
  --tag-text:     #00c8e0;
  --nav-bg:       rgba(2, 4, 16, 0.82);
  --chip-accent-bg:   #ff2d78;
  --chip-accent-text: #fff;
  --label-color:  var(--accent);
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  transition: color var(--trans);
}

/* =============================================
   BEACH — SKY
   ============================================= */
.bg-sky {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 62vh;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background: linear-gradient(180deg,
    var(--sky-top)  0%,
    var(--sky-mid) 48%,
    var(--sky-bot) 100%
  );
  transition: background 0.9s ease;
}

/* ── Sun (day) ── */
.bg-sky::before {
  content: '';
  position: absolute;
  top: 10%; right: 13%;
  width: 72px; height: 72px;
  border-radius: 50%;
  background: radial-gradient(circle at 42% 38%, #fffbd0 0%, #ffe050 45%, #ffb820 100%);
  box-shadow:
    0 0 0   10px rgba(255,220,60,0.16),
    0 0 0   24px rgba(255,200,40,0.10),
    0 0 0   50px rgba(255,180,20,0.06),
    0 0   90px  36px rgba(255,160,10,0.14);
  animation: sun-pulse 4s ease-in-out infinite;
  transition: opacity 0.9s ease, transform 0.9s ease;
}
[data-theme="dark"] .bg-sky::before {
  /* Moon */
  width: 54px; height: 54px;
  top: 9%; right: 12%;
  background: radial-gradient(circle at 36% 34%, #fffef0 0%, #ffeea0 55%, #f0d060 100%);
  box-shadow:
    0 0 0  8px  rgba(255,240,140,0.12),
    0 0 0  22px rgba(255,220,100,0.07),
    0 0  60px  22px rgba(255,210,80,0.16),
    0 0 120px  50px rgba(255,190,60,0.06);
  opacity: 1; transform: none;
  animation: none;
}
@keyframes sun-pulse {
  0%, 100% {
    box-shadow:
      0 0 0  10px rgba(255,220,60,0.16),
      0 0 0  24px rgba(255,200,40,0.10),
      0 0 0  50px rgba(255,180,20,0.06),
      0 0  90px 36px rgba(255,160,10,0.14);
    filter: brightness(1);
  }
  50% {
    box-shadow:
      0 0 0  16px rgba(255,225,70,0.26),
      0 0 0  38px rgba(255,205,50,0.18),
      0 0 0  72px rgba(255,185,30,0.11),
      0 0 130px 55px rgba(255,165,15,0.22);
    filter: brightness(1.12);
  }
}

/* ── Aurora (night only) ── */
[data-theme="dark"] .bg-sky {
  background: linear-gradient(180deg,
    var(--sky-top)  0%,
    var(--sky-mid) 48%,
    var(--sky-bot) 100%
  );
}
[data-theme="dark"] .bg-ocean::before {
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(60, 0, 120, 0.12) 20%,
    rgba(0, 60, 160, 0.55) 50%,
    rgba(60, 0, 120, 0.12) 80%,
    transparent 100%
  );
  filter: blur(14px);
  animation: aurora-shift 8s ease-in-out infinite alternate;
}
@keyframes aurora-shift {
  0%   { opacity: 0.6; transform: scaleX(0.9) translateX(-4%); }
  100% { opacity: 1;   transform: scaleX(1.1) translateX( 4%); }
}

/* ── Stars (night) ── */
[data-theme="dark"] .bg-sky::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    radial-gradient(1.5px 1.5px at  6%  9%,  rgba(255,255,255,0.95), transparent),
    radial-gradient(1px   1px   at 18%  5%,  rgba(255,255,255,0.80), transparent),
    radial-gradient(2px   2px   at 29% 18%,  rgba(255,255,255,0.90), transparent),
    radial-gradient(1px   1px   at 42%  4%,  rgba(255,255,255,0.75), transparent),
    radial-gradient(1.5px 1.5px at 55% 14%,  rgba(255,255,255,0.95), transparent),
    radial-gradient(1px   1px   at 68%  7%,  rgba(255,255,255,0.85), transparent),
    radial-gradient(2px   2px   at 79% 21%,  rgba(255,255,255,0.90), transparent),
    radial-gradient(1px   1px   at 90%  3%,  rgba(255,255,255,0.70), transparent),
    radial-gradient(1px   1px   at 11% 32%,  rgba(255,255,255,0.60), transparent),
    radial-gradient(1.5px 1.5px at 24% 40%,  rgba(200,230,255,0.85), transparent),
    radial-gradient(1px   1px   at 48% 35%,  rgba(200,230,255,0.70), transparent),
    radial-gradient(1px   1px   at 74% 43%,  rgba(200,230,255,0.60), transparent),
    radial-gradient(2px   2px   at 37% 10%,  rgba(220,240,255,0.95), transparent),
    radial-gradient(1.5px 1.5px at 63% 26%,  rgba(220,240,255,0.85), transparent),
    radial-gradient(1px   1px   at  2% 48%,  rgba(255,255,255,0.55), transparent),
    radial-gradient(1px   1px   at 86% 36%,  rgba(255,255,255,0.65), transparent),
    radial-gradient(1px   1px   at 14% 16%,  rgba(255,255,255,0.75), transparent),
    radial-gradient(1.5px 1.5px at 33% 28%,  rgba(220,240,255,0.85), transparent),
    radial-gradient(1px   1px   at 51% 22%,  rgba(255,255,255,0.70), transparent),
    radial-gradient(2px   2px   at 66% 39%,  rgba(220,240,255,0.90), transparent),
    radial-gradient(1px   1px   at 82% 11%,  rgba(255,255,255,0.80), transparent),
    radial-gradient(1px   1px   at  8% 22%,  rgba(255,255,255,0.65), transparent),
    radial-gradient(1.5px 1.5px at 45% 47%,  rgba(220,240,255,0.70), transparent),
    radial-gradient(1px   1px   at 58% 31%,  rgba(255,255,255,0.60), transparent),
    radial-gradient(1.5px 1.5px at 72% 15%,  rgba(255,255,255,0.90), transparent),
    radial-gradient(1px   1px   at 21% 12%,  rgba(255,255,255,0.72), transparent),
    radial-gradient(1px   1px   at 95% 18%,  rgba(255,255,255,0.75), transparent),
    radial-gradient(1.5px 1.5px at 40% 44%,  rgba(220,240,255,0.75), transparent),
    radial-gradient(1px   1px   at 30% 50%,  rgba(255,255,255,0.55), transparent),
    radial-gradient(1px   1px   at 93% 45%,  rgba(255,255,255,0.60), transparent),
    radial-gradient(2px   2px   at 16% 36%,  rgba(255,255,255,0.85), transparent),
    radial-gradient(1px   1px   at 60% 49%,  rgba(255,255,255,0.65), transparent);
  animation: twinkle 5s ease-in-out infinite alternate;
}
@keyframes twinkle {
  from { opacity: 0.70; }
  to   { opacity: 1.00; }
}

/* ── Clouds (day only) ── */
.cloud {
  position: absolute;
  border-radius: 50px;
  background: rgba(255,255,255,0.80);
  filter: blur(1px);
  transition: opacity 0.9s ease;
}
[data-theme="dark"] .cloud { opacity: 0; pointer-events: none; transition: opacity 0.4s ease; }
.cloud::before, .cloud::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  background: inherit;
}
.cloud-1 { top: 20%; left: 7%;  width: 130px; height: 30px; animation: cloud-drift 28s linear infinite; }
.cloud-1::before { width: 64px; height: 54px; top: -32px; left: 20px; }
.cloud-1::after  { width: 44px; height: 40px; top: -20px; left: 58px; }

.cloud-2 { top: 30%; left: 36%; width: 96px;  height: 24px; animation: cloud-drift 36s linear infinite reverse; }
.cloud-2::before { width: 50px; height: 42px; top: -24px; left: 14px; }
.cloud-2::after  { width: 34px; height: 30px; top: -14px; left: 44px; }

.cloud-3 { top: 16%; left: 60%; width: 110px; height: 26px; animation: cloud-drift 32s linear infinite; }
.cloud-3::before { width: 56px; height: 46px; top: -28px; left: 18px; }
.cloud-3::after  { width: 38px; height: 32px; top: -16px; left: 52px; }

@keyframes cloud-drift {
  0%   { transform: translateX(0); }
  50%  { transform: translateX(30px); }
  100% { transform: translateX(0); }
}

/* =============================================
   BEACH — OCEAN
   ============================================= */
.bg-ocean {
  position: fixed;
  top: 57vh; bottom: 18vh;
  left: 0; right: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background: linear-gradient(180deg,
    var(--ocean-top)  0%,
    var(--ocean-mid) 50%,
    var(--ocean-bot) 100%
  );
  transition: background 0.9s ease;
}

/* horizon glow */
.bg-ocean::before {
  content: '';
  position: absolute;
  top: -18px; left: 0; right: 0; height: 36px;
  background: var(--horizon-glow);
  filter: blur(14px);
}

/* moonlight shimmer strip (night) */
[data-theme="dark"] .bg-ocean::after {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 160px 100% at 72% 0%, rgba(0,200,255,0.18) 0%, transparent 70%);
  animation: moonstreak 5s ease-in-out infinite alternate;
}
@keyframes moonstreak {
  from { opacity: 0.5; transform: scaleX(0.85); }
  to   { opacity: 1;   transform: scaleX(1.15); }
}

/* animated waves */
.wave {
  position: absolute;
  left: -50%; width: 200%;
  border-radius: 45% 55% 42% 58%;
  background: rgba(255,255,255,0.22);
}
[data-theme="dark"] .wave { background: rgba(0,180,255,0.08); }

.wave-1 { height: 44px; top: -16px; animation: wave-roll 7s ease-in-out infinite; }
.wave-2 { height: 32px; top:  -8px; opacity: 0.55; animation: wave-roll 10s ease-in-out infinite reverse; }
.wave-3 { height: 20px; top:   2px; opacity: 0.35; animation: wave-roll 13s ease-in-out infinite 2s; }

@keyframes wave-roll {
  0%   { transform: translateX(0)   scaleY(1);    border-radius: 45% 55% 42% 58%; }
  33%  { transform: translateX(-4%) scaleY(1.06); border-radius: 52% 48% 36% 64%; }
  66%  { transform: translateX( 4%) scaleY(0.94); border-radius: 36% 64% 54% 46%; }
  100% { transform: translateX(0)   scaleY(1);    border-radius: 45% 55% 42% 58%; }
}

/* =============================================
   BEACH — SAND
   ============================================= */
.bg-sand {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: 20vh;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background: linear-gradient(180deg,
    var(--sand-top)  0%,
    var(--sand-mid) 55%,
    var(--sand-bot) 100%
  );
  transition: background 0.9s ease;
}
.bg-sand::before {
  content: '';
  position: absolute; inset: 0;
  background: repeating-linear-gradient(
    -8deg,
    transparent 0px, transparent 10px,
    rgba(255,255,255,0.05) 10px, rgba(255,255,255,0.05) 11px
  );
}

.foam {
  position: absolute;
  top: -5px; left: 0; right: 0; height: 14px;
  background: var(--foam);
  filter: blur(4px);
  border-radius: 50%;
  animation: foam-pulse 4s ease-in-out infinite;
}
@keyframes foam-pulse {
  0%, 100% { opacity: 0.55; transform: scaleY(1); }
  50%       { opacity: 1;   transform: scaleY(1.5); }
}

/* ── Beach balls (day only) ── */
.beach-ball {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #ffcce0, #ff69b4 52%, #c0206a 100%);
  box-shadow: 2px 5px 10px rgba(0,0,0,0.20), inset -3px -3px 7px rgba(0,0,0,0.10);
  pointer-events: none;
}
.beach-ball::after {
  content: '';
  position: absolute; inset: 0;
  border-radius: 50%;
  background: repeating-conic-gradient(
    rgba(255,255,255,0.30) 0deg 45deg,
    transparent 45deg 90deg
  );
}
.ball-1 { width: 36px; height: 36px; bottom: 12px; left: 10%;  animation: ball-bounce 1.8s ease-in-out infinite; }
.ball-2 { width: 28px; height: 28px; bottom:  7px; left: 31%;  animation: ball-bounce 2.2s ease-in-out infinite 0.6s; }
.ball-3 { width: 42px; height: 42px; bottom: 14px; left: 57%;  animation: ball-bounce 1.9s ease-in-out infinite 1.1s; }
.ball-4 { width: 24px; height: 24px; bottom:  5px; left: 78%;  animation: ball-bounce 2.1s ease-in-out infinite 0.3s; }

@keyframes ball-bounce {
  0%        { transform: translateY(0)    scaleX(1.00) scaleY(1.00); }
  48%, 52%  { transform: translateY(-26px) scaleX(1.00) scaleY(1.00); }
  95%       { transform: translateY(2px)  scaleX(1.07) scaleY(0.93); }
  100%      { transform: translateY(0)    scaleX(1.00) scaleY(1.00); }
}
[data-theme="dark"] .beach-ball { display: none; }

/* =============================================
   BEACH DECORATIONS
   ============================================= */
.beach-decor-layer {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

/* ── Day decorations (emoji props on sand with 3D feel) ── */
.beach-decor-layer { perspective: 900px; }
.b-item {
  position: absolute;
  font-family: 'Apple Color Emoji', 'Segoe UI Emoji', 'Noto Color Emoji', sans-serif;
  line-height: 1;
  user-select: none;
  transform-origin: bottom center;
  filter:
    drop-shadow(0 1px 0 rgba(255,255,255,0.35))
    drop-shadow(0 6px 4px rgba(0,0,0,0.28))
    drop-shadow(0 14px 14px rgba(0,0,0,0.18));
}

/* Sand area is bottom 20vh — keep bottom values between 0.5vh and 16vh */
.b-palm-1    { bottom: 4vh;   left:  4%;   font-size: 6rem;   transform: rotateX(6deg) rotateY(-8deg) rotate(-3deg); animation: palm-sway 6s ease-in-out infinite; transform-origin: bottom center; }
.b-palm-2    { bottom: 3.5vh; right: 5%;   font-size: 5rem;   transform: rotateX(6deg) rotateY(10deg) scaleX(-1) rotate(-4deg); animation: palm-sway 7.3s ease-in-out infinite reverse; transform-origin: bottom center; }
.b-umbrella  { bottom: 3vh;   left: 22%;   font-size: 4.4rem; transform: rotateX(8deg) rotateZ(-6deg); }
.b-castle    { bottom: 2.5vh; left: 48%;   font-size: 4rem;   transform: rotateX(10deg); }
.b-chair     { bottom: 2.5vh; left: 68%;   font-size: 3.2rem; transform: rotateX(8deg) rotateY(-12deg); }
.b-shell-1   { bottom: 1.2vh; left: 38%;   font-size: 1.6rem; transform: rotate(-22deg) scale(1.05); }
.b-shell-2   { bottom: 1vh;   right: 24%;  font-size: 1.4rem; transform: rotate(28deg); }
.b-starfish  { bottom: 1.3vh; left: 15%;   font-size: 1.7rem; transform: rotate(14deg); }
.b-crab      { bottom: 1.5vh; left: 58%;   font-size: 1.9rem; animation: crab-walk 9s ease-in-out infinite; }

@keyframes palm-sway {
  0%,100% { transform: rotateX(6deg) rotateY(-8deg) rotate(-3deg); }
  50%     { transform: rotateX(6deg) rotateY(-8deg) rotate(1deg); }
}
@keyframes crab-walk {
  0%,100% { transform: translateX(0) rotate(0); }
  25%     { transform: translateX(20px) rotate(-4deg); }
  50%     { transform: translateX(40px) rotate(0); }
  75%     { transform: translateX(20px) rotate(4deg); }
}

[data-theme="dark"] .b-item { display: none; }

/* ── Fireflies (night) ── */
.b-firefly {
  position: absolute;
  width: 3px; height: 3px;
  border-radius: 50%;
  background: #c8ff70;
  box-shadow: 0 0 4px #c8ff70, 0 0 10px rgba(200,255,112,0.55);
}
.b-ff1 { top: 68%; left: 15%; animation: ff-drift 3.2s ease-in-out infinite; }
.b-ff2 { top: 60%; left: 38%; animation: ff-drift 4.1s ease-in-out infinite 1.1s; }
.b-ff3 { top: 72%; left: 58%; animation: ff-drift 3.6s ease-in-out infinite 0.6s; }
.b-ff4 { top: 64%; left: 74%; animation: ff-drift 4.4s ease-in-out infinite 1.8s; }
.b-ff5 { top: 70%; left: 88%; animation: ff-drift 3.8s ease-in-out infinite 0.3s; }
[data-theme="light"] .b-firefly { display: none; }

@keyframes ff-drift {
  0%,100% { transform: translate(0, 0);         opacity: 0.15; }
  25%      { transform: translate(6px, -9px);    opacity: 0.90; }
  50%      { transform: translate(-4px, -15px);  opacity: 0.18; }
  75%      { transform: translate(9px, -7px);    opacity: 0.85; }
}

/* =============================================
   LAYOUT
   ============================================= */
.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 2;
}

/* =============================================
   NAV
   ============================================= */
.site-header {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  width: calc(100% - 48px);
  max-width: 1060px;
  border-radius: 18px;
  backdrop-filter: blur(24px) saturate(1.8);
  -webkit-backdrop-filter: blur(24px) saturate(1.8);
  background: var(--nav-bg);
  border: 1px solid var(--border);
  box-shadow: 0 4px 24px rgba(0,0,0,0.10), 0 1px 0 rgba(255,255,255,0.5) inset;
  transition: background var(--trans), border-color var(--trans), box-shadow var(--trans);
}
[data-theme="dark"] .site-header {
  border-color: rgba(0,229,255,0.15);
  box-shadow:
    0 4px 32px rgba(0,0,0,0.55),
    0 0 0 1px rgba(0,229,255,0.06),
    0 0 22px rgba(0,229,255,0.07);
}
.nav {
  padding: 0 1.75rem;
  height: 52px;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.nav-brand {
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.05em;
  margin-right: auto;
}
[data-theme="dark"] .nav-brand {
  text-shadow: 0 0 8px var(--accent), 0 0 20px rgba(0,229,255,0.35), 0 0 40px rgba(0,229,255,0.15);
  animation: neon-brand 11s linear infinite 2s;
}
@keyframes neon-brand {
  0%,100% { opacity:1; filter:brightness(1); }
  22%     { opacity:1; filter:brightness(1); }
  22.4%   { opacity:0.4; filter:brightness(0.3); }
  22.8%   { opacity:1; filter:brightness(1.3); }
  23.2%   { opacity:0.7; filter:brightness(0.6); }
  23.6%   { opacity:1; filter:brightness(1); }
  60%     { opacity:1; filter:brightness(1); }
  60.3%   { opacity:0.1; filter:brightness(0.05); }
  60.7%   { opacity:1; filter:brightness(1.4); }
  61%     { opacity:1; filter:brightness(1); }
}
.nav-links { display: flex; gap: 1.75rem; list-style: none; }
.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--trans);
}
.nav-links a:hover { color: var(--accent); }
.theme-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 5px 12px;
  cursor: pointer;
  font-size: 1rem;
  transition: border-color var(--trans), background var(--trans);
  flex-shrink: 0;
}
.theme-btn:hover { border-color: var(--accent); background: var(--accent-soft); }

/* =============================================
   SECTIONS
   ============================================= */
main { padding-top: 80px; position: relative; z-index: 2; }
.hero {
  min-height: calc(100vh - 60px);
  display: flex;
  align-items: center;
  padding: 5rem 0 4rem;
}
.section { padding: 5.5rem 0; }

.section-label {
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--label-color);
  margin-bottom: 2.25rem;
  display: flex;
  align-items: center;
  gap: 0.9rem;
}
.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}
.section-label { text-shadow: 0 1px 6px rgba(0,0,0,0.28); }
[data-theme="dark"] .section-label { text-shadow: 0 0 8px var(--accent); }

/* =============================================
   HERO
   ============================================= */
.hero-inner { width: 100%; }
.hero-location { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 1rem; font-weight: 500; }

/* NEON NAME */
.hero-name {
  font-family: var(--font-head);
  font-size: clamp(3rem, 9vw, 6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 1.1rem;
  cursor: default;
  display: inline-block;
  transition: color 0.15s ease;
}
.hero-name:hover { color: var(--accent); }

/* Neon glow helper */
.neon-ts {
  text-shadow:
    0 0 7px  #fff,
    0 0 16px #fff,
    0 0 32px #00e5ff,
    0 0 62px #00e5ff,
    0 0 100px rgba(0,229,255,0.50),
    0 0 140px rgba(0,229,255,0.22);
}

[data-theme="dark"] .hero-name {
  color: #fff;
  text-shadow:
    0 0 7px  #fff,
    0 0 16px #fff,
    0 0 32px #00e5ff,
    0 0 62px #00e5ff,
    0 0 100px rgba(0,229,255,0.50),
    0 0 140px rgba(0,229,255,0.22);
  animation: neon-idle 3s ease-in-out infinite;
}
[data-theme="dark"] .hero-name:hover {
  text-shadow:
    0 0 9px  #fff,
    0 0 22px #fff,
    0 0 44px #00e5ff,
    0 0 88px #00e5ff,
    0 0 130px rgba(0,229,255,0.65),
    0 0 180px rgba(0,229,255,0.30);
}

@keyframes neon-idle {
  0%, 100% {
    text-shadow:
      0 0 7px  #fff,
      0 0 16px #fff,
      0 0 32px #00e5ff,
      0 0 62px #00e5ff,
      0 0 100px rgba(0,229,255,0.50),
      0 0 140px rgba(0,229,255,0.22);
  }
  50% {
    text-shadow:
      0 0 10px #fff,
      0 0 22px #fff,
      0 0 44px #00e5ff,
      0 0 85px #00e5ff,
      0 0 130px rgba(0,229,255,0.62),
      0 0 175px rgba(0,229,255,0.28);
  }
}

[data-theme="dark"] .hero-name.neon-buzz {
  animation: neon-buzz-once 0.3s steps(1);
}
@keyframes neon-buzz-once {
  0%  { opacity:1;   filter:brightness(1); }
  15% { opacity:0.2; filter:brightness(0.1); }
  30% { opacity:1;   filter:brightness(1.5); }
  50% { opacity:0.5; filter:brightness(0.4); }
  65% { opacity:1;   filter:brightness(1.3); }
  80% { opacity:0.8; filter:brightness(0.7); }
  100%{ opacity:1;   filter:brightness(1); }
}

.hero-role {
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 1.4rem;
}
[data-theme="dark"] .hero-role { color: #ff7eb3; }

.hero-bio {
  font-size: 1.08rem;
  line-height: 1.78;
  color: var(--text-muted);
  max-width: 580px;
  margin-bottom: 2.25rem;
}
.hero-links { display: flex; flex-wrap: wrap; gap: 0.65rem; }

.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1.2rem;
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: var(--surface-card);
  backdrop-filter: blur(8px);
  transition: all var(--trans);
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
[data-theme="dark"] .chip:hover { box-shadow: 0 0 12px rgba(0,229,255,0.15); }
.chip-accent {
  background: var(--chip-accent-bg);
  color: var(--chip-accent-text);
  border-color: transparent;
}
.chip-accent:hover { filter: brightness(1.1); color: var(--chip-accent-text); }

/* =============================================
   PROSE
   ============================================= */
.prose-block {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 2rem 2.25rem;
  display: flex; flex-direction: column; gap: 1rem;
}
.prose-block p { font-size: 1.03rem; line-height: 1.82; color: var(--text-muted); }

/* =============================================
   CARDS
   ============================================= */
.stack { display: flex; flex-direction: column; gap: 1.1rem; }

.card {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 1.75rem 2rem;
  transition: border-color var(--trans), box-shadow var(--trans), transform var(--trans);
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
[data-theme="dark"] .card:hover { box-shadow: 0 6px 32px rgba(0,229,255,0.07); }

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.9rem;
}
.card-title { font-family: var(--font-head); font-size: 1.1rem; font-weight: 600; color: var(--text); line-height: 1.3; }
.card-sub   { font-size: 0.9rem; color: var(--text-muted); margin-top: 0.22rem; }
.card-date  { font-size: 0.8rem; font-weight: 600; color: var(--text-muted); white-space: nowrap; flex-shrink: 0; padding-top: 2px; }

/* ── Status Badges ── */
.card-badge {
  font-size: 0.70rem; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px; border-radius: 50px;
  white-space: nowrap; flex-shrink: 0;
  border: 1px solid;
}
.card-badge--current {
  color: #0d7a30; background: rgba(20,160,60,0.10); border-color: rgba(20,160,60,0.25);
}
[data-theme="dark"] .card-badge--current {
  color: #40ff80; background: rgba(40,255,100,0.08); border-color: rgba(40,255,100,0.20);
  box-shadow: 0 0 8px rgba(40,255,100,0.15);
}
.card-badge--pub {
  color: #a01040; background: rgba(200,30,80,0.08); border-color: rgba(200,30,80,0.20);
}
[data-theme="dark"] .card-badge--pub {
  color: #ff7eb3; background: rgba(255,45,120,0.10); border-color: rgba(255,45,120,0.22);
  box-shadow: 0 0 8px rgba(255,45,120,0.15);
}
.card-badge--done {
  color: #5a5a20; background: rgba(160,160,30,0.10); border-color: rgba(160,160,30,0.22);
}
[data-theme="dark"] .card-badge--done {
  color: #e0e050; background: rgba(220,220,40,0.08); border-color: rgba(220,220,40,0.20);
  box-shadow: 0 0 8px rgba(220,220,40,0.12);
}

.card-desc { font-size: 0.97rem; line-height: 1.72; color: var(--text-muted); margin-bottom: 0.85rem; }
.card-desc strong { color: var(--text); font-weight: 600; }

.detail-list { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.detail-list li {
  font-size: 0.93rem; color: var(--text-muted); line-height: 1.6;
  padding-left: 1.1rem; position: relative;
}
.detail-list li::before { content: '–'; position: absolute; left: 0; color: var(--accent); }

/* =============================================
   PUBLICATION BLOCK
   ============================================= */
.pub-block {
  margin-bottom: 0.9rem;
  padding: 0.9rem 1.1rem;
  border-radius: var(--radius-sm);
  background: rgba(0,0,0,0.03);
  border: 1px solid var(--border);
}
[data-theme="dark"] .pub-block {
  background: rgba(0,229,255,0.03);
  border-color: rgba(0,229,255,0.08);
}
.pub-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.45;
  margin-bottom: 0.75rem;
}
.pub-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }

.pub-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.32rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  border: 1px solid;
  transition: all var(--trans);
}
.pub-btn--pdf {
  color: #b01848; background: rgba(200,30,80,0.08); border-color: rgba(200,30,80,0.22);
}
.pub-btn--pdf:hover { background: rgba(200,30,80,0.16); }
[data-theme="dark"] .pub-btn--pdf {
  color: #ff7eb3; background: rgba(255,45,120,0.09); border-color: rgba(255,45,120,0.24);
}
[data-theme="dark"] .pub-btn--pdf:hover {
  background: rgba(255,45,120,0.18);
  box-shadow: 0 0 12px rgba(255,45,120,0.25);
}
.pub-btn--arxiv {
  color: #804808; background: rgba(160,90,10,0.08); border-color: rgba(160,90,10,0.20);
}
.pub-btn--arxiv:hover { background: rgba(160,90,10,0.16); }
[data-theme="dark"] .pub-btn--arxiv {
  color: #ffaa55; background: rgba(255,160,60,0.08); border-color: rgba(255,160,60,0.22);
}
[data-theme="dark"] .pub-btn--arxiv:hover {
  background: rgba(255,160,60,0.16);
  box-shadow: 0 0 12px rgba(255,160,60,0.20);
}

/* =============================================
   TAGS
   ============================================= */
.tag-row { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.tag {
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.03em;
  padding: 4px 10px; border-radius: var(--radius-sm);
  background: var(--tag-bg); color: var(--tag-text); border: 1px solid var(--border);
}
.text-link { color: var(--accent); text-decoration: none; font-weight: 500; transition: opacity var(--trans); }
.text-link:hover { opacity: 0.72; text-decoration: underline; }

/* =============================================
   PROJECTS
   ============================================= */
.projects-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.1rem; }
.project-card  { display: flex; flex-direction: column; gap: 0.7rem; }
.project-tags { display: flex; flex-direction: row; gap: 0.4rem; flex-wrap: wrap; align-items: flex-start; }
.project-tag {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.70rem; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase;
  padding: 3px 9px; border-radius: 50px; background: var(--tag-bg); color: var(--tag-text);
}
.project-links { margin-top: auto; padding-top: 0.5rem; }

/* =============================================
   CERTIFICATIONS — neon card style
   ============================================= */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 1.1rem;
}
.cert-card {
  position: relative;
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 1.5rem 1.75rem 1.5rem 2rem;
  overflow: hidden;
  transition: border-color var(--trans), box-shadow var(--trans), transform var(--trans);
}
.cert-card:hover { border-color: var(--accent); transform: translateY(-2px); }
[data-theme="dark"] .cert-card:hover {
  box-shadow: 0 0 22px rgba(0,229,255,0.10), inset 0 0 22px rgba(0,229,255,0.03);
}

/* left neon glow bar */
.cert-glow-line {
  position: absolute;
  top: 0; left: 0; bottom: 0; width: 3px;
  background: var(--accent);
  border-radius: 2px 0 0 2px;
  opacity: 0.5;
  transition: opacity var(--trans), box-shadow var(--trans);
}
[data-theme="dark"] .cert-glow-line {
  box-shadow: 0 0 8px var(--accent), 0 0 16px var(--accent);
  opacity: 0.7;
  animation: glow-bar-pulse 3s ease-in-out infinite;
}
@keyframes glow-bar-pulse {
  0%,100% { box-shadow: 0 0 6px var(--accent), 0 0 12px var(--accent); opacity: 0.65; }
  50%     { box-shadow: 0 0 12px var(--accent), 0 0 28px var(--accent), 0 0 50px rgba(0,229,255,0.3); opacity: 1; }
}
.cert-card:hover .cert-glow-line {
  opacity: 1;
}
[data-theme="dark"] .cert-card:hover .cert-glow-line {
  box-shadow: 0 0 12px var(--accent), 0 0 28px var(--accent), 0 0 50px rgba(0,229,255,0.3);
}

.cert-card--wide { grid-column: 1 / -1; }

.cert-card-issuer {
  font-family: var(--font-head);
  font-size: 0.74rem; font-weight: 700; letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 0.45rem;
}
[data-theme="dark"] .cert-card-issuer {
  text-shadow: 0 0 8px var(--accent), 0 0 18px rgba(0,229,255,0.3);
}
.cert-card-name {
  font-size: 1rem; font-weight: 600; color: var(--text); line-height: 1.4;
}
.cert-subcourses {
  list-style: none;
  display: grid; grid-template-columns: repeat(2,1fr);
  gap: 0.5rem 1.75rem; margin-top: 0.75rem;
}
.cert-subcourses li {
  font-size: 0.91rem; color: var(--text-muted); line-height: 1.5;
  padding-left: 1rem; position: relative;
}
.cert-subcourses li::before { content: '›'; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* =============================================
   SKILLS — neon boxes
   ============================================= */
.skills-groups { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.1rem; }

.skill-group-card {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 1.75rem 2rem;
  transition: border-color var(--trans), box-shadow var(--trans), transform var(--trans);
}
.skill-group-card:hover { border-color: var(--accent); transform: translateY(-2px); }
[data-theme="dark"] .skill-group-card:hover {
  box-shadow: 0 6px 28px rgba(0,229,255,0.07);
}

.skill-group-title {
  font-family: var(--font-head);
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 1.1rem;
}
[data-theme="dark"] .skill-group-title {
  text-shadow: 0 0 8px var(--accent), 0 0 18px rgba(0,229,255,0.25);
}

.skill-boxes { display: flex; flex-wrap: wrap; gap: 0.6rem; }

/* Each skill is a neon-outlined box */
.skill-box {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  cursor: default;
  transition: all var(--trans);
  opacity: 0.75;
}
.skill-box:hover { opacity: 1; }

[data-theme="dark"] .skill-box {
  border-color: rgba(0,229,255,0.35);
  color: var(--accent);
  background: rgba(0,229,255,0.05);
  box-shadow: 0 0 6px rgba(0,229,255,0.12), inset 0 0 6px rgba(0,229,255,0.04);
  text-shadow: 0 0 6px rgba(0,229,255,0.5);
  opacity: 0.8;
}
[data-theme="dark"] .skill-box:hover {
  border-color: var(--accent);
  background: rgba(0,229,255,0.10);
  box-shadow: 0 0 12px rgba(0,229,255,0.28), 0 0 24px rgba(0,229,255,0.10), inset 0 0 10px rgba(0,229,255,0.08);
  text-shadow: 0 0 10px rgba(0,229,255,0.8);
  opacity: 1;
}

/* =============================================
   CONTACT
   ============================================= */
.contact-intro {
  font-size: 1.03rem; line-height: 1.78; color: var(--text-muted);
  margin-bottom: 1.75rem; max-width: 540px;
}
.contact-row { display: flex; flex-wrap: wrap; gap: 0.8rem; }
.contact-link {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-card);
  backdrop-filter: blur(12px);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: all var(--trans);
}
.contact-link:hover { border-color: var(--accent); color: var(--accent); }
[data-theme="dark"] .contact-link:hover { box-shadow: 0 0 14px rgba(0,229,255,0.12); }

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
  position: relative; z-index: 2;
  border-top: 1px solid var(--border);
  background: var(--surface);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  padding: 1.4rem 0;
  transition: background var(--trans), border-color var(--trans);
}
.site-footer p { font-size: 0.84rem; color: var(--text-muted); text-align: center; }
.footer-link { color: var(--accent); text-decoration: none; font-weight: 500; }
.footer-link:hover { text-decoration: underline; }

/* =============================================
   REVEAL
   ============================================= */
.reveal {
  opacity: 0; transform: translateY(18px);
  transition: opacity 0.52s ease, transform 0.52s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 760px) {
  .projects-grid, .certs-grid, .skills-groups { grid-template-columns: 1fr; }
  .cert-card--wide { grid-column: 1; }
  .cert-subcourses { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .hero   { padding: 3.5rem 0; }
  .section{ padding: 3.5rem 0; }
  .card-header { flex-direction: column; gap: 0.4rem; }
}