:root {
  --bg: #07080c;
  --fg: #eef1f7;
  --muted: #9aa3b5;
  --faint: #5d6577;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --card: rgba(255, 255, 255, 0.035);
  --violet: #7c5cff;
  --cyan: #22d3ee;
  --pink: #ff5ca8;
  --lime: #a3e635;
  --amber: #fbbf24;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --radius: 22px;
  --font: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", "PingFang HK",
    "Hiragino Sans", "Noto Sans CJK TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  --mono: ui-monospace, "JetBrains Mono", "SF Mono", "Cascadia Code", Menlo, monospace;
}

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

html { background: var(--bg); color-scheme: dark; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  color: var(--fg);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 4px; border-radius: 12px; }

/* ---------- background ---------- */
.aurora {
  position: fixed;
  inset: -25vmax;
  z-index: -3;
  filter: blur(90px) saturate(1.2);
  opacity: 0.55;
  pointer-events: none;
}
.blob {
  position: absolute;
  width: 55vmax;
  height: 55vmax;
  border-radius: 50%;
  mix-blend-mode: screen;
  will-change: transform;
}
.b1 { background: radial-gradient(circle, var(--violet) 0%, transparent 62%); top: 5%; left: 10%; animation: drift1 26s ease-in-out infinite alternate; }
.b2 { background: radial-gradient(circle, var(--cyan) 0%, transparent 60%); top: 35%; right: 0%; animation: drift2 32s ease-in-out infinite alternate; }
.b3 { background: radial-gradient(circle, var(--pink) 0%, transparent 60%); bottom: 0%; left: 30%; opacity: 0.7; animation: drift3 38s ease-in-out infinite alternate; }

@keyframes drift1 { to { transform: translate3d(18vmax, 10vmax, 0) scale(1.15); } }
@keyframes drift2 { to { transform: translate3d(-22vmax, -8vmax, 0) scale(0.9); } }
@keyframes drift3 { to { transform: translate3d(10vmax, -16vmax, 0) scale(1.1); } }

.grid-lines {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 55% at 50% 20%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 55% at 50% 20%, #000 20%, transparent 75%);
  animation: gridPan 40s linear infinite;
}
@keyframes gridPan { to { background-position: 64px 64px, 64px 64px; } }

.grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.06;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- header ---------- */
.top {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  animation: fadeDown 0.9s var(--ease-out) both;
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 650; letter-spacing: -0.01em; }
.brand-mark {
  width: 22px;
  height: 22px;
  border-radius: 7px;
  background: conic-gradient(from 0deg, var(--violet), var(--cyan), var(--pink), var(--violet));
  box-shadow: 0 0 24px rgba(124, 92, 255, 0.55);
  animation: spin 8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.dim { color: var(--faint); }

.clock {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-family: var(--mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
.clock-city { color: var(--muted); font-family: var(--font); font-size: 12px; text-transform: uppercase; letter-spacing: 0.12em; }
.clock .sep { animation: blink 1s steps(2, start) infinite; }
@keyframes blink { to { opacity: 0.25; } }

/* ---------- hero ---------- */
main { width: min(1120px, calc(100% - 40px)); margin: 0 auto; flex: 1; }

.hero { padding: clamp(72px, 14vh, 150px) 0 clamp(48px, 8vh, 84px); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 22px;
  padding: 6px 14px 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.04em;
  animation: rise 0.9s var(--ease-out) 0.05s both;
}
.pulse { position: relative; width: 8px; height: 8px; border-radius: 50%; background: var(--lime); }
.pulse::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--lime);
  animation: ping 2s var(--ease-out) infinite;
}
@keyframes ping { 0% { transform: scale(1); opacity: 0.7; } 100% { transform: scale(3.2); opacity: 0; } }

.title {
  margin: 0;
  max-width: 14ch;
  text-wrap: balance;
  font-size: clamp(44px, 8.4vw, 104px);
  line-height: 0.98;
  font-weight: 750;
  letter-spacing: -0.045em;
  background: linear-gradient(100deg, #fff 0%, #fff 38%, #c7b8ff 50%, #8be9ff 60%, #fff 72%, #fff 100%);
  background-size: 250% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: shimmer 7s ease-in-out 1.6s infinite;
}
@keyframes shimmer { 0% { background-position: 100% 0; } 55%, 100% { background-position: 0% 0; } }

/* per-word / per-char reveal (spans added by main.js, removed again once it finishes
   so the gradient text + shimmer apply to the plain heading) */
.title.is-splitting { background: none; color: var(--fg); animation: none; }
.title .w { display: inline-block; white-space: nowrap; }
.title .ch {
  display: inline-block;
  animation: charIn 0.95s var(--ease-out) both;
  animation-delay: calc(var(--i, 0) * 28ms + 120ms);
}
@keyframes charIn {
  from { opacity: 0; transform: translateY(0.45em) rotate(6deg); filter: blur(10px); }
  to { opacity: 1; transform: none; filter: blur(0); }
}

.lede {
  margin: 26px 0 0;
  max-width: 36em;
  color: var(--muted);
  font-size: clamp(16px, 1.7vw, 19px);
  animation: rise 1s var(--ease-out) 0.65s both;
}

@keyframes rise { from { opacity: 0; transform: translateY(18px); filter: blur(6px); } to { opacity: 1; transform: none; filter: blur(0); } }
@keyframes fadeDown { from { opacity: 0; transform: translateY(-12px); } to { opacity: 1; transform: none; } }

/* ---------- sections ---------- */
.section { margin: 0 0 72px; }
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin: 0 0 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.section-head h2 { margin: 0; font-size: 14px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; }
.section-head p { margin: 0; color: var(--faint); font-size: 13px; }

.reveal { opacity: 0; transform: translateY(24px); }
.reveal.in { animation: rise 0.9s var(--ease-out) both; animation-delay: calc(var(--i, 0) * 70ms); }

/* ---------- tool cards ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }

.card {
  --mx: 50%;
  --my: 50%;
  --rx: 0deg;
  --ry: 0deg;
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 18px;
  height: 100%;
  min-height: 236px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.015));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
  transform: perspective(900px) rotateX(var(--rx)) rotateY(var(--ry)) translateZ(0);
  transition: transform 0.35s var(--ease-out), border-color 0.35s, box-shadow 0.35s;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background: radial-gradient(420px circle at var(--mx) var(--my), rgba(124, 92, 255, 0.22), rgba(34, 211, 238, 0.08) 35%, transparent 60%);
  opacity: 0;
  transition: opacity 0.35s;
}
.card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: radial-gradient(260px circle at var(--mx) var(--my), rgba(255, 255, 255, 0.55), transparent 60%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.35s;
  pointer-events: none;
}
.card:hover, .card:focus-visible {
  border-color: var(--line-strong);
  box-shadow: 0 30px 80px -30px rgba(124, 92, 255, 0.45);
}
.card:hover::before, .card:hover::after, .card:focus-visible::before, .card:focus-visible::after { opacity: 1; }

.icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  transition: transform 0.5s var(--ease-out), background 0.35s;
}
.icon svg { width: 22px; height: 22px; fill: none; stroke: var(--fg); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.card:hover .icon { transform: translateY(-3px) rotate(-6deg) scale(1.06); background: rgba(124, 92, 255, 0.18); }

.card-body { display: flex; flex-direction: column; gap: 8px; }
.card-title { font-size: 20px; font-weight: 650; letter-spacing: -0.02em; }
.card-desc { color: var(--muted); font-size: 14.5px; }
.tag {
  margin-left: 6px;
  padding: 1px 7px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  vertical-align: 3px;
}

.meta { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.host { color: var(--faint); font-family: var(--mono); font-size: 12px; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 550;
}
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge.public { color: var(--lime); background: rgba(163, 230, 53, 0.1); }
.badge.login { color: var(--cyan); background: rgba(34, 211, 238, 0.1); }
.badge.invite { color: var(--amber); background: rgba(251, 191, 36, 0.1); }

.arrow {
  position: absolute;
  top: 20px;
  right: 22px;
  color: var(--faint);
  font-size: 20px;
  line-height: 1;
  transition: transform 0.45s var(--ease-out), color 0.3s;
}
.card:hover .arrow, .card:focus-visible .arrow { transform: translate(3px, -3px); color: var(--fg); }

/* ---------- daily links ---------- */
.links { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 0 28px; }
.link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px 34px 18px 2px;
  border-bottom: 1px solid var(--line);
  font-size: 17px;
  font-weight: 550;
  overflow: hidden;
}
.link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--violet), var(--cyan), var(--pink));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.6s var(--ease-out);
}
.link:hover::after, .link:focus-visible::after { transform: scaleX(1); }
.link-sub { color: var(--faint); font-size: 13px; font-weight: 450; transition: color 0.3s; }
.link:hover .link-sub { color: var(--muted); }
.link .arrow { top: 50%; right: 4px; margin-top: -10px; font-size: 16px; }
.link:hover .arrow, .link:focus-visible .arrow { transform: translate(3px, -3px); color: var(--fg); }

/* ---------- footer ---------- */
.foot {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0 calc(32px + env(safe-area-inset-bottom));
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 600px) {
  .top { padding-top: 20px; }
  .clock-city { display: none; }
  .hero { padding-top: 64px; }
  .card { min-height: 0; }
  .section { margin-bottom: 56px; }
}

@media (hover: none) {
  .card::before { opacity: 0.6; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    animation-delay: 0ms !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .blob, .grid-lines, .brand-mark { animation: none !important; }
}