/* ============================================================
   Solar Birthday — cosmic UI
   ============================================================ */

:root {
  --bg:          #05060d;
  --bg-2:        #0a0f1f;
  --panel:       rgba(255, 255, 255, 0.035);
  --panel-brd:   rgba(255, 255, 255, 0.08);
  --panel-brd-2: rgba(255, 255, 255, 0.14);

  --text:   #eef1f8;
  --muted:  #98a2bd;
  --faint:  #5c6580;

  --sun:    #ffc766;
  --sun-hot:#ff8a3c;
  --earth:  #5de4ff;
  --mint:   #00ff99;   /* homage to the original */

  --glow-sun:  0 0 60px rgba(255, 150, 40, 0.35);
  --radius:    18px;
  --maxw:      920px;

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono:    'Roboto Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1200px 700px at 50% -10%, #101a36 0%, transparent 60%),
    radial-gradient(900px 600px at 85% 20%, #1a1230 0%, transparent 55%),
    linear-gradient(180deg, var(--bg-2) 0%, var(--bg) 55%);
  color: var(--text);
  font-family: var(--font-display);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Starfield + vignette ------------------------------------- */
#stars {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  display: block;
}
.vignette {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(120% 90% at 50% 35%, transparent 55%, rgba(0,0,0,0.55) 100%);
}

.wrap {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(2.4rem, 6vw, 5rem) clamp(1.1rem, 4vw, 2rem) 4rem;
}

/* Hero ----------------------------------------------------- */
.hero { text-align: center; }

.eyebrow {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.32em;
  font-size: 0.72rem;
  color: var(--sun);
  margin: 0 0 1.1rem;
  opacity: 0.9;
}

.hero h1 {
  font-size: clamp(2.9rem, 10vw, 5.4rem);
  font-weight: 700;
  line-height: 0.98;
  margin: 0;
  letter-spacing: -0.02em;
  background: linear-gradient(180deg, #fff 0%, #ffe6b8 45%, var(--sun) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 50px rgba(255, 180, 80, 0.15);
}

.subtitle {
  max-width: 40ch;
  margin: 1.3rem auto 0;
  color: var(--muted);
  font-size: clamp(1rem, 2.4vw, 1.14rem);
  line-height: 1.6;
}
.subtitle em { color: var(--text); font-style: normal; border-bottom: 1px dashed var(--sun); }

/* Orbit stage ---------------------------------------------- */
.stage {
  display: flex;
  justify-content: center;
  margin: clamp(1.6rem, 5vw, 3rem) 0 0;
}
.orbit-wrap {
  position: relative;
  width: min(460px, 88vw);
  aspect-ratio: 1;
}
#orbit { width: 100%; height: 100%; overflow: visible; }

.orbit-ring {
  fill: none;
  stroke: rgba(255, 255, 255, 0.09);
  stroke-width: 1;
  stroke-dasharray: 2 8;
}
.orbit-track {
  fill: none;
  stroke: rgba(255, 255, 255, 0.05);
  stroke-width: 4;
}
#progressArc {
  fill: none;
  stroke: url(#arcGrad);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-dasharray: 1068.14;   /* 2·π·170 */
  stroke-dashoffset: 1068.14;  /* set by JS */
  filter: drop-shadow(0 0 6px rgba(255, 175, 70, 0.55));
  transition: stroke-dashoffset 1.4s cubic-bezier(.22,.61,.36,1);
}

.sun { transform-box: fill-box; transform-origin: center; animation: sunPulse 5.5s ease-in-out infinite; }
.corona {
  fill: none;
  stroke: rgba(255, 170, 60, 0.35);
  stroke-width: 1.5;
  transform-box: fill-box;
  transform-origin: center;
}
.corona-1 { animation: coronaPulse 4s ease-in-out infinite; }
.corona-2 { animation: coronaPulse 6s ease-in-out infinite 0.6s; }

.earth-tether { stroke: rgba(93, 228, 255, 0.16); stroke-width: 1; }
.earth-halo   { fill: rgba(93, 228, 255, 0.18); }
.earth {
  filter: drop-shadow(0 0 8px rgba(93, 228, 255, 0.7));
}
.earth-group-live .earth { animation: earthTwinkle 3s ease-in-out infinite; }

@keyframes sunPulse {
  0%,100% { filter: url(#glow) drop-shadow(0 0 14px rgba(255,150,40,.5)); }
  50%     { filter: url(#glow) drop-shadow(0 0 26px rgba(255,150,40,.85)); }
}
@keyframes coronaPulse {
  0%,100% { transform: scale(1);    opacity: 0.5; }
  50%     { transform: scale(1.12); opacity: 0.15; }
}
@keyframes earthTwinkle {
  0%,100% { opacity: 1; }
  50%     { opacity: 0.72; }
}

.orbit-readout {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  pointer-events: none;
  gap: 0.25rem;
}
.ro-value {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 5vw, 2.2rem);
  font-weight: 700;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0,0,0,0.55), 0 0 24px rgba(255, 160, 60, 0.55);
  line-height: 1;
}
.ro-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #ffe9c7;
  text-shadow: 0 1px 4px rgba(0,0,0,0.7);
  max-width: 12ch;
}

/* Panels --------------------------------------------------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--panel-brd);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* Controls ------------------------------------------------- */
.controls {
  max-width: 440px;
  margin: clamp(1.4rem, 4vw, 2.4rem) auto 0;
  padding: 1.6rem;
}
.controls form { display: flex; flex-direction: column; gap: 1.1rem; }
.field { display: flex; flex-direction: column; gap: 0.4rem; }
.field label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sun);
}
.field label .opt { color: var(--faint); text-transform: none; letter-spacing: 0; }

.field input {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--text);
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--panel-brd-2);
  border-radius: 12px;
  padding: 0.8rem 0.9rem;
  color-scheme: dark;
  transition: border-color .2s, box-shadow .2s;
}
.field input:focus {
  outline: none;
  border-color: var(--sun);
  box-shadow: 0 0 0 3px rgba(255, 199, 102, 0.15);
}

#calculate {
  position: relative;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.02rem;
  color: #1a1005;
  border: none;
  border-radius: 12px;
  padding: 0.95rem 1rem;
  cursor: pointer;
  background: linear-gradient(120deg, #ffe08a 0%, var(--sun) 45%, var(--sun-hot) 100%);
  box-shadow: 0 8px 30px rgba(255, 138, 60, 0.28), inset 0 1px 0 rgba(255,255,255,.4);
  transition: transform .15s ease, box-shadow .2s ease, filter .2s;
}
#calculate:hover { transform: translateY(-2px); box-shadow: 0 12px 40px rgba(255, 138, 60, 0.42); filter: brightness(1.05); }
#calculate:active { transform: translateY(0); }

.hint { margin: 0.1rem 0 0; font-size: 0.8rem; color: var(--faint); line-height: 1.5; }
.error { margin: 0; font-family: var(--font-mono); font-size: 0.82rem; color: #ff8a8a; }

/* Results -------------------------------------------------- */
.results {
  margin-top: clamp(2rem, 6vw, 3.4rem);
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  animation: rise .7s cubic-bezier(.22,.61,.36,1) both;
}
@keyframes rise { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: none; } }

/* Countdown */
.countdown-panel { padding: clamp(1.5rem, 4vw, 2.2rem); text-align: center; }
.cd-eyebrow {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.24em;
  font-size: 0.72rem;
  color: var(--muted);
  margin: 0;
}
.cd-laps {
  font-size: clamp(1.15rem, 3.6vw, 1.55rem);
  font-weight: 600;
  margin: 0.5rem 0 1.3rem;
  color: var(--mint);
  text-shadow: 0 0 30px rgba(0, 255, 153, 0.25);
}
.countdown {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: clamp(0.4rem, 2vw, 1rem);
  flex-wrap: nowrap;
}
.cd-unit { display: flex; flex-direction: column; align-items: center; gap: 0.3rem; min-width: 3.2rem; }
.cd-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.8rem, 8vw, 3.2rem);
  line-height: 1;
  color: #fff;
  font-variant-numeric: tabular-nums;
  text-shadow: 0 0 24px rgba(93, 228, 255, 0.3);
}
.cd-lab {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--faint);
}
.cd-sep {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.4rem, 6vw, 2.4rem);
  color: var(--faint);
  align-self: flex-start;
  margin-top: 0.1em;
}
.cd-date {
  margin: 1.3rem 0 0;
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: clamp(0.85rem, 2.4vw, 1rem);
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin: 1.5rem auto 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.94rem;
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--panel-brd-2);
  border-radius: 999px;
  padding: 0.7rem 1.35rem;
  cursor: pointer;
  transition: transform .15s ease, background .2s, border-color .2s, box-shadow .2s;
}
.share-btn svg { color: var(--mint); }
.share-btn:hover {
  transform: translateY(-2px);
  background: rgba(0, 255, 153, 0.09);
  border-color: rgba(0, 255, 153, 0.5);
  box-shadow: 0 8px 26px rgba(0, 255, 153, 0.14);
}
.share-btn:active { transform: translateY(0); }
.share-btn:disabled { opacity: 0.6; cursor: default; transform: none; box-shadow: none; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.6rem;
  transform: translate(-50%, 1.4rem);
  z-index: 20;
  max-width: min(90vw, 30rem);
  padding: 0.8rem 1.2rem;
  border-radius: 12px;
  background: rgba(12, 16, 30, 0.92);
  border: 1px solid var(--panel-brd-2);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease, transform .3s ease;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* Stat grid */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.1rem;
}
.stat { padding: 1.3rem 1.4rem; }
.stat-label {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.66rem;
  color: var(--muted);
  margin: 0 0 0.6rem;
}
.stat-value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.6rem, 5vw, 2.3rem);
  margin: 0;
  line-height: 1.05;
  color: #fff;
  font-variant-numeric: tabular-nums;
}
.stat-value small { font-size: 0.55em; color: var(--muted); font-weight: 500; }
.stat-sub { margin: 0.45rem 0 0; font-size: 0.82rem; color: var(--faint); line-height: 1.4; }

/* Table */
.table-panel { padding: clamp(1.3rem, 4vw, 1.8rem); }
.table-head h2 { margin: 0; font-size: 1.25rem; font-weight: 600; }
.table-head p { margin: 0.4rem 0 1.1rem; color: var(--muted); font-size: 0.88rem; }
.milestone-dot {
  display: inline-block;
  width: 0.5rem; height: 0.5rem;
  border-radius: 50%;
  background: var(--sun);
  box-shadow: 0 0 8px var(--sun);
  vertical-align: middle;
}

.expand-earlier {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--panel-brd);
  border-radius: 10px;
  padding: 0.65rem 1rem;
  margin: 0 0 0.9rem;
  cursor: pointer;
  transition: color .2s, background .2s, border-color .2s;
}
.expand-earlier:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--panel-brd-2);
}
.expand-earlier .chev {
  font-size: 0.58rem;
  color: var(--sun);
  transition: transform .3s ease;
}
.expand-earlier.open .chev { transform: rotate(180deg); }

.table-scroll { max-height: 420px; overflow-y: auto; border-radius: 12px; }
.table-scroll::-webkit-scrollbar { width: 8px; }
.table-scroll::-webkit-scrollbar-thumb { background: rgba(255,255,255,.12); border-radius: 8px; }

table { width: 100%; border-collapse: collapse; font-family: var(--font-mono); font-size: 0.9rem; }
thead th {
  position: sticky; top: 0;
  background: rgba(12, 16, 30, 0.96);
  backdrop-filter: blur(4px);
  text-align: left;
  padding: 0.7rem 0.9rem;
  font-weight: 500;
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sun);
  border-bottom: 1px solid var(--panel-brd);
}
tbody td { padding: 0.72rem 0.9rem; border-bottom: 1px solid rgba(255,255,255,.045); color: var(--muted); }
tbody tr:hover td { background: rgba(255,255,255,.03); color: var(--text); }
tbody tr.next td { color: var(--text); background: rgba(0, 255, 153, 0.06); }
tbody tr.next td:first-child { box-shadow: inset 3px 0 0 var(--mint); }
tbody tr.milestone td:first-child { color: var(--sun); }
tbody td:first-child { font-weight: 700; color: var(--text); }
.col-day { color: var(--faint); }

/* already-completed laps */
tbody tr.past td { color: var(--faint); }
tbody tr.past td:first-child { color: var(--muted); }
tbody tr.past.milestone td:first-child { color: var(--sun); }
tbody tr.past:hover td { color: var(--muted); }

/* Footer --------------------------------------------------- */
.foot {
  margin-top: 3.5rem;
  text-align: center;
  color: var(--faint);
  font-size: 0.86rem;
  line-height: 1.7;
  border-top: 1px solid var(--panel-brd);
  padding-top: 2rem;
}
.foot .mono { font-family: var(--font-mono); color: var(--sun); }
.foot-credit { margin-top: 1rem; font-size: 0.78rem; opacity: 0.75; }

/* Responsive ----------------------------------------------- */
@media (max-width: 560px) {
  .stat-grid { grid-template-columns: 1fr; }
  .cd-unit { min-width: 2.6rem; }
  .col-day { display: none; }
  thead th.col-day { display: none; }
}

/* Motion preferences --------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}