/* Interactive H–R Diagram Laboratory — Created by Biswajit Jana, 2026. Please keep credit when reusing. */
:root {
  --bg: #010204;
  --panel: rgba(5, 13, 26, 0.84);
  --panel2: rgba(9, 21, 38, 0.72);
  --line: rgba(53, 242, 208, 0.22);
  --line-soft: rgba(148, 163, 184, 0.14);
  --text: #eaf2ff;
  --muted: #a8b7d1;
  --dim: #62748e;
  --cyan: #35f2d0;
  --blue: #65a8ff;
  --amber: #ffba6a;
  --red: #ff4d6d;
  --green: #a6ff8f;
  --shadow: 0 24px 90px rgba(0, 0, 0, 0.62);
}

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

html, body {
  width: 100%; height: 100%; background: var(--bg); color: var(--text); overflow: hidden;
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

body {
  background:
    radial-gradient(circle at 18% 18%, rgba(53, 242, 208, 0.075), transparent 30%),
    radial-gradient(circle at 85% 22%, rgba(101, 168, 255, 0.065), transparent 32%),
    linear-gradient(180deg, #000102, #010204 60%, #020814);
}

button, input, select, code { font-family: inherit; }

.monitor-noise, .monitor-scanlines { position: fixed; inset: 0; pointer-events: none; }
.monitor-noise {
  z-index: 50; opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.78' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: screen;
}
.monitor-scanlines {
  z-index: 51; opacity: 0.16;
  background: repeating-linear-gradient(to bottom, rgba(255,255,255,0.07) 0, rgba(255,255,255,0.07) 1px, transparent 1px, transparent 5px);
  mix-blend-mode: screen;
}

.app {
  position: relative; z-index: 1; width: 100vw; height: 100vh; display: grid;
  grid-template-columns: 350px minmax(460px, 1fr) 370px;
  grid-template-rows: auto minmax(0, 1fr) 44px;
  grid-template-areas: "top top top" "left viewport right" "footer footer footer";
  gap: 12px; padding: 12px; min-width: 0; min-height: 0;
}

.topbar, .panel, .viewport-shell, .footer {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(8,18,34,0.86), rgba(2,7,15,0.76)), radial-gradient(circle at 12% 0%, rgba(53,242,208,0.075), transparent 42%);
  border-radius: 22px;
  box-shadow: 0 0 0 1px rgba(53,242,208,0.035) inset, 0 0 32px rgba(53,242,208,0.045), var(--shadow);
  backdrop-filter: blur(18px) saturate(1.3);
}

.topbar { grid-area: top; display: grid; grid-template-columns: minmax(0,1fr) auto; align-items: center; gap: 18px; padding: 16px 18px; min-height: 116px; }
.brand .eyebrow, .loading-card .eyebrow { display: block; color: var(--cyan); font-size: 0.66rem; font-weight: 900; letter-spacing: 0.18em; text-transform: uppercase; margin-bottom: 8px; text-shadow: 0 0 16px rgba(53,242,208,0.55); }
.brand h1 { font-size: clamp(1.45rem, 2.1vw, 2.35rem); line-height: 1.05; letter-spacing: -0.055em; margin-bottom: 8px; }
.brand h1 em { color: var(--cyan); font-style: normal; }
.brand p { max-width: 980px; color: var(--muted); font-size: 0.78rem; line-height: 1.5; font-weight: 600; }
.top-actions { display: grid; gap: 10px; min-width: 360px; }

.arm-button {
  min-height: 48px; border: 1px solid rgba(53,242,208,0.46); border-radius: 16px; color: var(--cyan);
  background: linear-gradient(135deg, rgba(53,242,208,0.13), rgba(101,168,255,0.055)), rgba(3,10,19,0.88);
  font-weight: 900; font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; cursor: pointer;
  box-shadow: 0 0 0 1px rgba(53,242,208,0.08) inset, 0 0 32px rgba(53,242,208,0.20);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.arm-button:hover { transform: translateY(-1px); border-color: rgba(53,242,208,0.75); box-shadow: 0 0 0 1px rgba(53,242,208,0.14) inset, 0 0 48px rgba(53,242,208,0.34); }
.arm-button:disabled { cursor: wait; opacity: 0.65; transform: none; }
.arm-dot { display: inline-block; width: 9px; height: 9px; margin-right: 10px; border-radius: 999px; background: var(--cyan); box-shadow: 0 0 20px rgba(53,242,208,0.9); animation: pulse 1.4s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 0.42; transform: scale(0.82); } 50% { opacity: 1; transform: scale(1.22); } }

.mode-toggle { position: relative; display: grid; grid-template-columns: 1fr 1fr; min-height: 42px; border: 1px solid rgba(53,242,208,0.22); border-radius: 15px; overflow: hidden; background: rgba(2,6,23,0.52); isolation: isolate; }
.mode-toggle input { position: absolute; opacity: 0; pointer-events: none; }
.mode-toggle label { position: relative; z-index: 2; display: grid; place-items: center; color: var(--muted); font-size: 0.62rem; font-weight: 900; cursor: pointer; }
.mode-toggle input:checked + label { color: #010204; }
.mode-toggle-indicator { position: absolute; z-index: 1; inset: 4px auto 4px 4px; width: calc(50% - 4px); border-radius: 11px; background: linear-gradient(135deg, var(--cyan), var(--blue)); box-shadow: 0 0 25px rgba(53,242,208,0.35); transition: transform 0.25s ease; }
#mode-galaxy:checked ~ .mode-toggle-indicator { transform: translateX(100%); }

.sidebar-left { grid-area: left; }
.sidebar-right { grid-area: right; }
.panel { min-width: 0; min-height: 0; overflow-y: auto; overflow-x: hidden; padding: 16px; }
.panel-section { margin-bottom: 20px; }
.panel-section h2, .console-header h2 { display: flex; align-items: center; gap: 9px; color: var(--text); font-size: 0.68rem; font-weight: 900; letter-spacing: 0.16em; text-transform: uppercase; margin-bottom: 11px; }
.panel-section h2::before, .console-header h2::before { content: ""; width: 18px; height: 1px; background: var(--cyan); box-shadow: 0 0 14px rgba(53,242,208,0.65); }

.target-box, .query-box, .buffer-list div, .metric, .console-log { border: 1px solid var(--line-soft); border-radius: 16px; background: rgba(2,6,23,0.48); box-shadow: 0 0 0 1px rgba(53,242,208,0.025) inset; }
.target-box { padding: 12px; }
.target-box label { display: block; color: var(--dim); font-size: 0.58rem; font-weight: 900; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 8px; }
.control-spacer { margin-top: 12px; }
.target-box select { width: 100%; border: 1px solid rgba(53,242,208,0.22); border-radius: 12px; padding: 10px; color: var(--text); background: rgba(8,18,34,0.95); font-weight: 800; margin-bottom: 10px; }
.target-box p { color: var(--muted); font-size: 0.68rem; line-height: 1.5; margin-top: 10px; }
.secondary-button { width: 100%; margin-top: 10px; border: 1px solid rgba(53,242,208,0.28); border-radius: 12px; padding: 10px 12px; color: var(--cyan); background: rgba(53,242,208,0.06); font-weight: 900; font-size: 0.62rem; cursor: pointer; }
.secondary-button:hover { background: rgba(53,242,208,0.12); }
.layer-toggle-row { display: grid; gap: 9px; margin: 8px 0 4px; }
.mini-toggle { display: flex !important; align-items: center; gap: 9px; color: var(--muted) !important; font-size: 0.65rem !important; letter-spacing: 0 !important; text-transform: none !important; cursor: pointer; }
.mini-toggle input { display: none; }
.mini-toggle span { width: 32px; height: 18px; border-radius: 999px; border: 1px solid rgba(53,242,208,0.25); background: rgba(148,163,184,0.12); position: relative; }
.mini-toggle span::before { content: ""; position: absolute; width: 12px; height: 12px; left: 2px; top: 2px; border-radius: 50%; background: var(--dim); transition: 0.2s; }
.mini-toggle input:checked + span { background: rgba(53,242,208,0.18); border-color: rgba(53,242,208,0.58); }
.mini-toggle input:checked + span::before { transform: translateX(14px); background: var(--cyan); box-shadow: 0 0 12px rgba(53,242,208,0.8); }

.query-box { padding: 12px; color: #b8c9ff; font-size: 0.58rem; line-height: 1.55; white-space: pre-wrap; overflow-x: auto; }
.buffer-list { display: grid; gap: 8px; }
.buffer-list div { padding: 11px; }
.buffer-list span, .metric span { display: block; color: var(--dim); font-size: 0.55rem; font-weight: 900; letter-spacing: 0.13em; text-transform: uppercase; margin-bottom: 6px; }
.buffer-list strong { color: var(--text); font-size: 0.66rem; line-height: 1.35; }

.viewport-shell { grid-area: viewport; position: relative; min-width: 0; min-height: 0; overflow: hidden; background: #010204; }
.webgl-canvas { display: block; width: 100%; height: 100%; }
.viewport-grid { position: absolute; inset: 0; pointer-events: none; background-image: linear-gradient(rgba(53,242,208,0.045) 1px, transparent 1px), linear-gradient(90deg, rgba(53,242,208,0.045) 1px, transparent 1px); background-size: 44px 44px; mask-image: radial-gradient(circle at center, #000 0%, #000 60%, transparent 100%); }
.viewport-hud { position: absolute; top: 16px; left: 16px; right: 16px; display: flex; justify-content: space-between; gap: 12px; pointer-events: none; }
.viewport-hud div { min-width: 160px; border: 1px solid rgba(53,242,208,0.18); border-radius: 14px; padding: 10px 12px; background: rgba(2,6,23,0.62); backdrop-filter: blur(12px); }
.viewport-hud span { display: block; color: var(--dim); font-size: 0.54rem; font-weight: 900; letter-spacing: 0.13em; text-transform: uppercase; margin-bottom: 5px; }
.viewport-hud strong { color: var(--cyan); font-size: 0.68rem; }

.loading-screen { position: absolute; inset: 0; display: none; place-items: center; padding: 24px; background: radial-gradient(circle at 50% 45%, rgba(53,242,208,0.10), transparent 34%), rgba(1,2,4,0.18); pointer-events: none; }
.loading-screen.is-visible { display: grid; }
.loading-card { width: min(640px, 92%); border: 1px solid rgba(53,242,208,0.26); border-radius: 24px; padding: 24px; text-align: center; background: rgba(5,13,26,0.86); box-shadow: 0 0 0 1px rgba(53,242,208,0.04) inset, 0 0 60px rgba(53,242,208,0.11), 0 24px 80px rgba(0,0,0,0.62); backdrop-filter: blur(18px); }
.loading-card h2 { font-size: clamp(1.25rem, 2.2vw, 2rem); line-height: 1.1; letter-spacing: -0.05em; margin-bottom: 10px; }
.loading-card p { color: var(--muted); font-size: 0.74rem; line-height: 1.55; max-width: 540px; margin: 0 auto 18px; }
.progress-wrap { height: 12px; overflow: hidden; border: 1px solid rgba(53,242,208,0.24); border-radius: 999px; background: rgba(148,163,184,0.13); box-shadow: inset 0 0 14px rgba(0,0,0,0.5); }
.progress-bar { height: 100%; width: 0%; border-radius: 999px; background: linear-gradient(90deg, rgba(53,242,208,0.25), var(--cyan), var(--blue)); box-shadow: 0 0 24px rgba(53,242,208,0.56); transition: width 0.18s ease; }
.progress-meta { display: flex; justify-content: space-between; gap: 12px; margin-top: 9px; color: var(--dim); font-size: 0.60rem; font-weight: 900; letter-spacing: 0.08em; text-transform: uppercase; }
.error-box { margin-top: 14px; color: var(--red); font-size: 0.68rem; line-height: 1.55; padding: 10px 12px; border: 1px solid rgba(255,77,109,0.28); border-radius: 14px; background: rgba(255,77,109,0.06); }

.metric-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.metric { padding: 12px; min-width: 0; }
.metric strong { color: var(--cyan); font-size: 1rem; font-weight: 900; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.console-section { min-height: 280px; }
.console-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.console-header button { border: 1px solid rgba(53,242,208,0.22); border-radius: 999px; padding: 6px 10px; color: var(--cyan); background: rgba(53,242,208,0.06); font-size: 0.58rem; font-weight: 900; cursor: pointer; }
.console-log { height: min(42vh, 420px); overflow-y: auto; padding: 10px; }
.console-line { display: grid; grid-template-columns: 78px minmax(0,1fr); gap: 8px; padding: 6px 0; border-bottom: 1px solid rgba(148,163,184,0.08); color: var(--muted); font-size: 0.62rem; line-height: 1.35; }
.console-line span { color: var(--dim); }
.console-line strong { color: var(--muted); font-weight: 700; }
.console-line--success strong { color: var(--green); }
.console-line--error strong { color: var(--red); }
.footer { grid-area: footer; display: flex; align-items: center; justify-content: space-between; gap: 12px; min-width: 0; padding: 0 16px; color: var(--muted); font-size: 0.62rem; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; }

@media (max-width: 1180px) {
  html, body { overflow: auto; }
  .app { height: auto; min-height: 100vh; grid-template-columns: 1fr; grid-template-rows: auto auto 68vh auto auto; grid-template-areas: "top" "left" "viewport" "right" "footer"; }
  .topbar { grid-template-columns: 1fr; }
  .top-actions { min-width: 0; }
  .footer { min-height: 52px; flex-direction: column; align-items: flex-start; padding: 12px 16px; }
}
@media (max-width: 700px) {
  .app { padding: 8px; gap: 8px; grid-template-rows: auto auto 62vh auto auto; }
  .metric-grid { grid-template-columns: 1fr; }
  .viewport-hud { display: none; }
  .mode-toggle { grid-template-columns: 1fr; }
  .mode-toggle-indicator { display: none; }
  .mode-toggle label { min-height: 40px; }
  .mode-toggle input:checked + label { color: var(--cyan); background: rgba(53,242,208,0.10); }
}


/* Final polish: keep the cinematic glow while streaming, then quiet the background once data is ready. */
.app.data-ready .viewport-grid {
  opacity: 0.34;
  background-image:
    linear-gradient(rgba(53,242,208,0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53,242,208,0.028) 1px, transparent 1px);
}

.app.data-ready .viewport-shell {
  background: #01040a;
}

.science-caption {
  position: absolute;
  left: 18px;
  bottom: 18px;
  width: min(440px, calc(100% - 36px));
  border: 1px solid rgba(53,242,208,0.16);
  border-radius: 16px;
  padding: 12px 14px;
  background: rgba(2,6,23,0.55);
  backdrop-filter: blur(10px);
  color: var(--muted);
  font-size: 0.66rem;
  line-height: 1.45;
  pointer-events: none;
  opacity: 0.72;
}

.science-caption strong {
  display: block;
  color: rgba(53,242,208,0.92);
  font-size: 0.62rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.science-caption span {
  display: block;
}

.loading-screen.is-visible ~ .science-caption,
.app:not(.data-ready) .science-caption {
  opacity: 0;
}

.app.data-ready .loading-screen {
  background: rgba(1,2,4,0.04);
}

@media (max-width: 1180px) {
  .science-caption { display: none; }
}


/* Observatory dashboard skin inspired by the reference H–R interface */
.app {
  grid-template-columns: 318px minmax(720px, 1fr) 360px;
  grid-template-rows: auto minmax(0, 1fr) 62px;
  gap: 10px;
  padding: 10px;
}

.topbar {
  min-height: 92px;
  border-radius: 14px;
  padding: 14px 18px;
}

.brand h1 {
  font-size: clamp(1.7rem, 2.4vw, 2.7rem);
  letter-spacing: -0.045em;
}

.brand .eyebrow {
  color: #35f2d0;
}

.panel,
.viewport-shell,
.footer {
  border-radius: 12px;
  background:
    linear-gradient(180deg, rgba(3, 12, 22, 0.88), rgba(1, 4, 9, 0.82)),
    radial-gradient(circle at 35% 8%, rgba(53, 242, 208, 0.055), transparent 45%);
  border-color: rgba(53, 242, 208, 0.18);
  box-shadow: 0 0 0 1px rgba(53,242,208,0.03) inset, 0 14px 60px rgba(0,0,0,0.52);
}

.viewport-shell {
  min-height: 0;
  overflow: hidden;
}

.webgl-canvas {
  filter: contrast(1.05) saturate(1.08);
}

.app.data-ready .viewport-shell::before {
  opacity: 0.10 !important;
}

.science-caption {
  right: auto;
  left: 50%;
  transform: translateX(-50%);
  bottom: 18px;
  max-width: 670px;
  background: rgba(1, 8, 14, 0.76);
}

.observatory-right {
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto;
}

.observatory-card {
  padding-bottom: 12px;
}

.region-table {
  display: grid;
  gap: 13px;
}

.region-table div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 12px;
  align-items: baseline;
  font-size: 0.88rem;
  color: var(--muted);
}

.region-table strong {
  color: var(--text);
  font-size: 0.92rem;
  min-width: 72px;
  text-align: right;
}

.region-table em {
  font-style: normal;
  color: var(--cyan);
  min-width: 48px;
  text-align: right;
}

.region-super { color: #ff4df0; }
.region-giant { color: #ff8a3d; }
.region-main { color: #35f2d0; }
.region-dwarf { color: #65a8ff; }

.chart-card {
  padding-bottom: 10px;
}

.mini-chart {
  width: 100%;
  height: 138px;
  display: block;
  border-radius: 8px;
  border: 1px solid rgba(53,242,208,0.10);
  background: rgba(0,0,0,0.35);
}

.spectral-bars {
  height: 76px;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  align-items: end;
  gap: 4px;
  padding: 8px 4px 0;
  background: linear-gradient(180deg, rgba(2,8,16,0.4), rgba(0,0,0,0.2));
  border: 1px solid rgba(53,242,208,0.10);
  border-radius: 8px;
}

.spectral-bar {
  border-radius: 6px 6px 2px 2px;
  box-shadow: 0 0 14px currentColor;
  min-height: 8px;
}

.spectral-percentages {
  margin-top: 7px;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  text-align: center;
  font-size: 0.66rem;
}

.spectral-percentages span {
  display: grid;
  gap: 2px;
}

.spectral-percentages em {
  color: var(--muted);
  font-style: normal;
  font-size: 0.58rem;
}

.observatory-console {
  min-height: 170px;
  flex: 1;
}

.observatory-console .console-log {
  max-height: none;
  height: 100%;
}

.observatory-footer {
  display: grid;
  grid-template-columns: 1.1fr 1.3fr 1.25fr 1.4fr 1fr;
  gap: 0;
  align-items: center;
  padding: 0 12px;
  text-align: left;
}

.footer-stat {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  padding: 0 18px;
  border-right: 1px solid rgba(148,163,184,0.12);
}

.footer-stat:last-child {
  border-right: 0;
}

.footer-stat > span {
  color: var(--cyan);
  font-size: 1.7rem;
  line-height: 1;
}

.footer-stat small {
  display: block;
  color: var(--cyan);
  text-transform: uppercase;
  font-size: 0.63rem;
  letter-spacing: 0.09em;
  margin-bottom: 3px;
}

.footer-stat strong {
  display: block;
  color: var(--text);
  font-size: 0.92rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-left .panel-section h2,
.sidebar-right .panel-section h2 {
  letter-spacing: 0.18em;
}

@media (max-width: 1260px) {
  .app {
    grid-template-columns: 300px minmax(520px, 1fr);
    grid-template-areas:
      "top top"
      "left viewport"
      "right right"
      "footer footer";
    grid-template-rows: auto minmax(480px, 1fr) 420px 62px;
    overflow: auto;
  }

  html, body { overflow: auto; }

  .observatory-right {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .observatory-console {
    grid-column: 1 / -1;
  }
}


/* Interaction polish: download, zoom, robust crediting */
.zoom-tools {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7px;
  margin-top: 9px;
}

.zoom-tools button {
  border: 1px solid rgba(53,242,208,0.25);
  border-radius: 10px;
  background: rgba(5,14,28,0.88);
  color: var(--text);
  font-size: 0.66rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  padding: 9px 5px;
  cursor: pointer;
}

.zoom-tools button:hover,
.secondary-button:hover,
.arm-button:hover {
  border-color: rgba(53,242,208,0.72);
  box-shadow: 0 0 26px rgba(53,242,208,0.22);
}

.secondary-button + .secondary-button {
  margin-top: 8px;
}

.telemetry-compact .metric-grid {
  grid-template-columns: repeat(2, 1fr);
}

.footer-credit {
  position: absolute;
  right: 20px;
  bottom: 3px;
  font-size: 0.58rem;
  color: rgba(234,242,255,0.45);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer-credit strong {
  color: var(--cyan);
}

.observatory-footer {
  position: relative;
}

.arm-button {
  position: relative;
  z-index: 5;
  pointer-events: auto;
}

.top-actions {
  position: relative;
  z-index: 5;
}

.viewport-shell canvas {
  cursor: crosshair;
}

@media (max-width: 1260px) {
  .footer-credit {
    position: static;
    grid-column: 1 / -1;
    padding: 0 18px;
  }
}