/* Deep Field — main stylesheet
   Dark "deep space" theme, no external fonts or frameworks. */

:root {
  color-scheme: dark;

  --bg: #05070f;
  --bg-2: #0a0f1f;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-2: rgba(255, 255, 255, 0.065);
  --surface-solid: #0e1428;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);

  --text: #e9ecf8;
  --text-2: #b9c0dc;
  --muted: #8d96b8;
  --faint: #5f6889;

  --violet: #9b8cff;
  --cyan: #46d9f5;
  --amber: #ffbe5c;
  --rose: #ff7aa8;
  --green: #5ee6a8;
  --grad: linear-gradient(115deg, #9b8cff 0%, #6aa8ff 45%, #46d9f5 100%);
  --grad-warm: linear-gradient(115deg, #ffbe5c 0%, #ff7aa8 100%);

  --font-sans: "Segoe UI Variable Text", "SF Pro Text", ui-sans-serif, system-ui, -apple-system,
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: "Segoe UI Variable Display", "SF Pro Display", ui-sans-serif, system-ui,
    -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --font-mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;

  --radius: 18px;
  --radius-sm: 12px;
  --maxw: 1180px;
  --gutter: clamp(16px, 4vw, 32px);
  --header-h: 68px;
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.7);
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

/* ---------- Base ---------- */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--bg);
  background-image:
    radial-gradient(1200px 600px at 85% -10%, rgba(110, 90, 255, 0.16), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(70, 217, 245, 0.08), transparent 60%),
    radial-gradient(1000px 700px at 50% 120%, rgba(255, 122, 168, 0.06), transparent 60%);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img,
svg,
canvas {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
}

a {
  color: var(--cyan);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #8be8fa;
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.5em;
  font-weight: 700;
}

p {
  margin: 0 0 1.1em;
}

::selection {
  background: rgba(155, 140, 255, 0.4);
  color: #fff;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--surface-solid);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  color: var(--text);
}

.skip-link:focus {
  top: 12px;
}

.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(5, 7, 15, 0.72);
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.brand:hover {
  color: #fff;
}

.brand svg {
  width: 30px;
  height: 30px;
}

.brand small {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: -2px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav a {
  position: relative;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--text-2);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav a:hover {
  color: var(--text);
  background: var(--surface-2);
}

.nav a[aria-current="page"] {
  color: var(--text);
  background: var(--surface-2);
  box-shadow: inset 0 0 0 1px var(--border);
}

.nav .nav-cta {
  margin-left: 6px;
  color: #0b0f1e;
  background: var(--grad);
  font-weight: 600;
}

.nav .nav-cta:hover,
.nav .nav-cta[aria-current="page"] {
  color: #0b0f1e;
  background: var(--grad);
  filter: brightness(1.08);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle svg {
  width: 20px;
  height: 20px;
}

@media (max-width: 820px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 12px var(--gutter) 20px;
    background: rgba(7, 10, 20, 0.97);
    border-bottom: 1px solid var(--border);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, transform 0.2s var(--ease), visibility 0.2s;
  }

  .nav-open .nav {
    transform: none;
    opacity: 1;
    visibility: visible;
  }

  .nav a {
    padding: 12px 14px;
    border-radius: 12px;
  }

  .nav .nav-cta {
    margin: 8px 0 0;
    text-align: center;
  }
}

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 60;
  height: 3px;
  width: 100%;
  transform-origin: 0 50%;
  transform: scaleX(0);
  background: var(--grad);
  pointer-events: none;
}

/* ---------- Buttons & chips ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font: 600 0.98rem/1 var(--font-sans);
  cursor: pointer;
  transition: transform 0.2s var(--ease), box-shadow 0.2s, background 0.2s, border-color 0.2s;
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  color: #0b0f1e;
  background: var(--grad);
  box-shadow: 0 10px 30px -10px rgba(110, 160, 255, 0.6);
}

.btn-primary:hover {
  color: #0b0f1e;
  transform: translateY(-2px);
  box-shadow: 0 16px 36px -12px rgba(110, 160, 255, 0.75);
}

.btn-ghost {
  color: var(--text);
  background: var(--surface);
  border-color: var(--border-strong);
}

.btn-ghost:hover {
  color: var(--text);
  background: var(--surface-2);
  transform: translateY(-2px);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--chip, var(--violet));
  background: color-mix(in srgb, var(--chip, var(--violet)) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--chip, var(--violet)) 28%, transparent);
}

.chip--space {
  --chip: var(--violet);
}

.chip--physics {
  --chip: var(--cyan);
}

.chip--earth {
  --chip: var(--green);
}

.chip--tech {
  --chip: var(--amber);
}

.eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.hero canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 160px;
  background: linear-gradient(to bottom, transparent, var(--bg));
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 40px;
  min-height: min(760px, 86vh);
  padding-block: 72px 96px;
}

.hero h1 {
  font-size: clamp(2.6rem, 6.2vw, 4.9rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.02;
  margin-bottom: 22px;
}

.hero-lede {
  max-width: 34rem;
  font-size: clamp(1.05rem, 1.6vw, 1.22rem);
  color: var(--text-2);
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  margin-top: 44px;
  padding-top: 26px;
  border-top: 1px solid var(--border);
  max-width: 34rem;
}

.hero-stats strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}

.hero-stats span {
  font-size: 0.85rem;
  color: var(--muted);
}

/* Planet illustration (pure CSS) */
.orrery {
  position: relative;
  width: min(420px, 80vw);
  aspect-ratio: 1;
  justify-self: center;
}

.planet {
  position: absolute;
  inset: 18%;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 28%, rgba(255, 255, 255, 0.55), transparent 22%),
    repeating-linear-gradient(-18deg, transparent 0 18px, rgba(255, 255, 255, 0.05) 18px 30px),
    radial-gradient(circle at 35% 30%, #b9a6ff 0%, #6d5bd8 35%, #2b2275 70%, #120e3a 100%);
  box-shadow:
    inset -30px -40px 70px rgba(0, 0, 0, 0.65),
    0 0 80px rgba(155, 140, 255, 0.35),
    0 0 200px rgba(70, 217, 245, 0.15);
}

.ring {
  position: absolute;
  inset: 40% -2%;
  border-radius: 50%;
  border: 10px solid rgba(160, 220, 255, 0.35);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.08), inset 0 0 0 2px rgba(255, 255, 255, 0.05);
  transform: rotate(-16deg);
}

/* The front half of the ring overlaps the planet */
.ring--front {
  clip-path: polygon(0 50%, 100% 50%, 100% 100%, 0 100%);
  z-index: 2;
}

.orbit {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px dashed rgba(255, 255, 255, 0.12);
  animation: spin 40s linear infinite;
}

.orbit .moon {
  position: absolute;
  top: 8%;
  left: 50%;
  width: 22px;
  height: 22px;
  margin-left: -11px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff, #c9d3ff 40%, #6874a8 100%);
  box-shadow: 0 0 20px rgba(200, 210, 255, 0.6);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 12px;
    min-height: 0;
    padding-block: 28px 64px;
  }

  .orrery {
    order: -1;
    width: min(190px, 50vw);
  }
}

/* ---------- Sections ---------- */

.section {
  padding-block: clamp(56px, 8vw, 96px);
}

.section--tight {
  padding-block: 40px;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.section-head h2 {
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  margin: 0;
}

.section-head p {
  max-width: 40rem;
  margin: 10px 0 0;
  color: var(--muted);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  white-space: nowrap;
}

.link-arrow::after {
  content: "→";
  transition: transform 0.2s var(--ease);
}

.link-arrow:hover::after {
  transform: translateX(4px);
}

/* ---------- Cards ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: 24px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: transform 0.3s var(--ease), border-color 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow), 0 0 0 1px rgba(155, 140, 255, 0.12);
}

.card-cover {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-2);
}

.card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}

.card:hover .card-cover img {
  transform: scale(1.04);
}

.card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 22px 22px 20px;
}

.card-body > .chip {
  align-self: flex-start;
}

.topic-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.topic-links a {
  padding: 10px 18px;
  font-size: 0.85rem;
}

.card h3 {
  font-size: 1.28rem;
  margin: 12px 0 10px;
}

.card h3 a {
  color: var(--text);
}

/* Whole card is clickable */
.card h3 a::after {
  content: "";
  position: absolute;
  inset: 0;
}

.card p {
  color: var(--muted);
  font-size: 0.97rem;
  margin-bottom: 18px;
}

.card-meta {
  margin-top: auto;
  display: flex;
  gap: 14px;
  font-size: 0.84rem;
  color: var(--faint);
}

.card--featured {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
}

.card--featured .card-cover {
  aspect-ratio: auto;
  min-height: 340px;
}

.card--featured .card-body {
  padding: clamp(24px, 4vw, 44px);
  justify-content: center;
}

.card--featured h3 {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
}

.card--featured p {
  font-size: 1.05rem;
}

@media (max-width: 820px) {
  .card--featured {
    grid-template-columns: 1fr;
  }

  .card--featured .card-cover {
    min-height: 0;
    aspect-ratio: 16 / 9;
  }
}

/* ---------- Fact of the day ---------- */

.fact {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 28px clamp(22px, 4vw, 40px);
  border-radius: var(--radius);
  background:
    linear-gradient(var(--bg-2), var(--bg-2)) padding-box,
    var(--grad) border-box;
  border: 1px solid transparent;
  overflow: hidden;
}

.fact::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(500px 200px at 0% 0%, rgba(155, 140, 255, 0.18), transparent 70%);
  pointer-events: none;
}

.fact-icon {
  position: relative;
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: var(--surface-2);
  border: 1px solid var(--border);
}

.fact-icon svg {
  width: 28px;
  height: 28px;
  color: var(--amber);
}

.fact-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
}

.fact-text {
  position: relative;
  margin: 4px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-weight: 600;
  line-height: 1.4;
  transition: opacity 0.25s;
}

@media (max-width: 680px) {
  .fact {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

/* ---------- Tool teasers ---------- */

.tool-card {
  position: relative;
  padding: 28px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: transform 0.3s var(--ease), border-color 0.3s;
}

.tool-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
}

.tool-head .tool-icon {
  flex: none;
  margin-bottom: 0;
}

.tool-icon {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  margin-bottom: 18px;
  border-radius: 14px;
  background: color-mix(in srgb, var(--accent, var(--violet)) 15%, transparent);
  color: var(--accent, var(--violet));
}

.tool-icon svg {
  width: 26px;
  height: 26px;
}

.tool-card h3 {
  font-size: 1.2rem;
}

.tool-card h3 a {
  color: var(--text);
}

.tool-card h3 a::after {
  content: "";
  position: absolute;
  inset: 0;
}

.tool-card p {
  color: var(--muted);
  margin: 0;
  font-size: 0.96rem;
}

/* ---------- Topic filter ---------- */

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.filters button {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-2);
  font: 500 0.92rem var(--font-sans);
  cursor: pointer;
  transition: all 0.2s;
}

.filters button:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.filters button[aria-pressed="true"] {
  color: #0b0f1e;
  background: var(--text);
  border-color: var(--text);
}

.card[hidden] {
  display: none;
}

/* ---------- Page header (inner pages) ---------- */

.page-hero {
  padding-block: clamp(48px, 7vw, 88px) clamp(28px, 4vw, 44px);
}

.page-hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.page-hero .lede {
  max-width: 44rem;
  font-size: 1.15rem;
  color: var(--text-2);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
  padding: 0;
  list-style: none;
  font-size: 0.88rem;
  color: var(--faint);
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--faint);
}

.breadcrumbs a {
  color: var(--muted);
}

.breadcrumbs a:hover {
  color: var(--text);
}

/* ---------- Article ---------- */

.article-header {
  max-width: 860px;
  padding-block: clamp(40px, 6vw, 72px) 28px;
}

.article-header h1 {
  font-size: clamp(2.1rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 16px 0 18px;
}

.article-header .lede {
  font-size: clamp(1.1rem, 1.8vw, 1.28rem);
  color: var(--text-2);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  margin-top: 22px;
  font-size: 0.9rem;
  color: var(--muted);
}

.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-meta svg {
  width: 16px;
  height: 16px;
  opacity: 0.8;
}

.article-cover {
  border-radius: calc(var(--radius) + 4px);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  aspect-ratio: 16 / 9;
}

.article-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 56px;
  padding-block: 48px 24px;
}

.article-aside {
  position: relative;
}

.aside-sticky {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.toc {
  padding: 20px 22px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
}

.toc h2 {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

.toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: toc;
}

.toc li {
  counter-increment: toc;
}

.toc a {
  display: flex;
  gap: 10px;
  padding: 6px 0;
  font-size: 0.92rem;
  line-height: 1.4;
  color: var(--text-2);
}

.toc a::before {
  content: counter(toc, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--faint);
  padding-top: 2px;
}

.toc a:hover,
.toc a.is-active {
  color: var(--text);
}

.toc a.is-active::before {
  color: var(--cyan);
}

.share {
  display: flex;
  gap: 10px;
}

@media (max-width: 1000px) {
  .article-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .article-aside {
    order: -1;
  }

  .aside-sticky {
    position: static;
  }

  /* Sidebar ads are desktop-only (also in ?adslots=1 debug mode) */
  .article-aside .ad-slot,
  .show-ad-slots .article-aside .ad-slot {
    display: none;
  }
}

/* Prose */
.prose {
  max-width: 720px;
  font-size: 1.08rem;
  line-height: 1.78;
  color: #d7dcef;
}

.prose > p:first-of-type::first-letter {
  float: left;
  font-family: var(--font-serif);
  font-size: 3.6em;
  line-height: 0.85;
  padding: 6px 12px 0 0;
  color: var(--violet);
}

.prose h2 {
  font-size: clamp(1.5rem, 2.6vw, 1.95rem);
  margin: 2.2em 0 0.7em;
  color: var(--text);
}

.prose > :first-child {
  margin-top: 0;
}

.prose h3 {
  font-size: 1.25rem;
  margin: 1.8em 0 0.6em;
  color: var(--text);
}

.prose a {
  text-decoration: underline;
  text-decoration-color: rgba(70, 217, 245, 0.4);
  text-underline-offset: 3px;
}

.prose strong {
  color: var(--text);
}

.prose ul,
.prose ol {
  padding-left: 1.3em;
  margin: 0 0 1.3em;
}

.prose li {
  margin-bottom: 0.5em;
}

.prose li::marker {
  color: var(--violet);
}

.prose blockquote {
  margin: 1.8em 0;
  padding: 4px 0 4px 24px;
  border-left: 3px solid var(--violet);
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-style: italic;
  line-height: 1.5;
  color: var(--text);
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--surface-2);
}

.prose .formula {
  margin: 1.6em 0;
  padding: 18px 22px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  font-family: var(--font-serif);
  font-size: 1.35rem;
  text-align: center;
  color: var(--text);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
  margin: 2em 0;
}

.stat {
  padding: 18px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
}

.stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 5vw, 1.6rem);
  white-space: nowrap;
  letter-spacing: -0.02em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat span {
  font-size: 0.88rem;
  line-height: 1.4;
  color: var(--muted);
  display: block;
}

.callout {
  margin: 2.2em 0;
  padding: 24px 26px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(155, 140, 255, 0.1), rgba(70, 217, 245, 0.06));
  border: 1px solid rgba(155, 140, 255, 0.25);
}

.callout h2,
.callout h3 {
  margin: 0 0 12px;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}

.callout ul {
  margin: 0;
}

.callout li:last-child {
  margin-bottom: 0;
}

.sources {
  margin-top: 2.4em;
  padding-top: 1.4em;
  border-top: 1px solid var(--border);
  font-size: 0.92rem;
  color: var(--muted);
}

.sources h2 {
  font-size: 1rem;
  margin: 0 0 0.6em;
}

/* ---------- Tools page ---------- */

.tool {
  scroll-margin-top: calc(var(--header-h) + 20px);
  padding: clamp(24px, 4vw, 40px);
  border-radius: calc(var(--radius) + 4px);
  background: var(--surface);
  border: 1px solid var(--border);
}

.tool + .tool,
.tool + .ad-slot,
.ad-slot + .tool {
  margin-top: 32px;
}

.tool-head {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  margin-bottom: 26px;
}

.tool-head h2 {
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  margin-bottom: 6px;
}

.tool-head p {
  margin: 0;
  color: var(--muted);
}

@media (max-width: 560px) {
  .tool-head {
    flex-direction: column;
    gap: 14px;
  }
}

.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: flex-end;
  margin-bottom: 26px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
}

.field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-2);
}

.field input,
.field select {
  height: 48px;
  padding: 0 14px;
  border-radius: 12px;
  border: 1px solid var(--border-strong);
  background: var(--bg-2);
  color: var(--text);
  font: 500 1rem var(--font-sans);
  min-width: 0;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(70, 217, 245, 0.2);
}

.field input[type="number"] {
  width: 160px;
}

.segmented {
  display: inline-flex;
  padding: 4px;
  border-radius: 12px;
  background: var(--bg-2);
  border: 1px solid var(--border-strong);
}

.segmented button {
  height: 38px;
  padding: 0 16px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--muted);
  font: 600 0.92rem var(--font-sans);
  cursor: pointer;
}

.segmented button[aria-pressed="true"] {
  background: var(--surface-2);
  color: var(--text);
}

.planet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 200px), 1fr));
  gap: 12px;
}

.planet-result {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  border-radius: 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
}

.planet-dot {
  flex: none;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 30%, rgba(255, 255, 255, 0.7), var(--c) 38%, color-mix(in srgb, var(--c) 30%, #000) 100%);
  box-shadow: 0 0 18px color-mix(in srgb, var(--c) 45%, transparent);
}

.planet-result strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.planet-result span {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.35;
}

.result-note {
  margin: 18px 0 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.result-highlight {
  margin-top: 20px;
  padding: 18px 20px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(255, 190, 92, 0.12), rgba(255, 122, 168, 0.08));
  border: 1px solid rgba(255, 190, 92, 0.3);
  color: var(--text);
}

.result-highlight:empty {
  display: none;
}

.light-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.97rem;
}

.light-table th,
.light-table td {
  padding: 13px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.light-table th {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}

.light-table td:last-child {
  font-family: var(--font-mono);
  color: var(--cyan);
  white-space: nowrap;
}

.light-table tr.is-live td:first-child::after {
  content: "live";
  margin-left: 8px;
  padding: 2px 7px;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--green);
  background: rgba(94, 230, 168, 0.12);
}

.table-wrap {
  overflow-x: auto;
}

/* ---------- Downloads & content locker ---------- */

.btn-lg {
  padding: 17px 30px;
  font-size: 1.05rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
  margin-top: 28px;
}

.cta-meta {
  font-size: 0.9rem;
  color: var(--muted);
}

.locker-note {
  flex-basis: 100%;
  margin: 0;
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 0.92rem;
  color: var(--text);
  background: rgba(255, 190, 92, 0.1);
  border: 1px solid rgba(255, 190, 92, 0.35);
}

/* ?adslots=1 also reveals which locker link each button uses */
.show-ad-slots a[data-locker] {
  position: relative;
  outline: 2px dashed rgba(255, 190, 92, 0.8);
  outline-offset: 4px;
}

.show-ad-slots a[data-locker]::after {
  content: "LOCKER · " attr(data-locker) " · " attr(data-locker-state);
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  white-space: nowrap;
  font: 700 0.68rem var(--font-mono);
  color: var(--amber);
}

.split-hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.guide-cover {
  justify-self: center;
  width: min(340px, 80%);
  border-radius: 10px;
  box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.8), 0 0 0 1px var(--border-strong);
  transform: rotate(3deg);
}

@media (max-width: 860px) {
  .split-hero {
    grid-template-columns: 1fr;
  }

  .guide-cover {
    order: -1;
    width: min(220px, 60%);
  }
}

.checklist {
  list-style: none;
  padding: 0;
  margin: 22px 0 0;
  display: grid;
  gap: 10px;
}

.checklist li {
  display: flex;
  gap: 10px;
  color: var(--text-2);
}

.checklist li::before {
  content: "✓";
  flex: none;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 700;
  color: #0b0f1e;
  background: var(--green);
  margin-top: 3px;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: 22px;
}

.shot {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
}

.shot-media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-2);
}

.shot-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.shot--locked .shot-media img {
  filter: saturate(0.9) brightness(0.85);
}

.lock-badge {
  position: absolute;
  right: 12px;
  bottom: 12px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 11px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #fff;
  background: rgba(5, 7, 15, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.lock-badge svg {
  width: 13px;
  height: 13px;
}

.shot figcaption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
}

.shot figcaption strong {
  font-family: var(--font-display);
  font-size: 1.05rem;
}

.shot figcaption span {
  font-size: 0.82rem;
  color: var(--muted);
}

.shot .btn {
  padding: 9px 14px;
  font-size: 0.85rem;
  white-space: nowrap;
}

.page-previews {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.page-previews img {
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 20px 40px -18px rgba(0, 0, 0, 0.8), 0 0 0 1px var(--border);
}

@media (max-width: 640px) {
  .page-previews {
    grid-template-columns: 1fr 1fr;
  }

  .page-previews img:nth-child(3) {
    display: none;
  }
}

.cta-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 52px);
  border-radius: calc(var(--radius) + 6px);
  background:
    radial-gradient(600px 260px at 100% 0%, rgba(70, 217, 245, 0.16), transparent 70%),
    radial-gradient(600px 300px at 0% 100%, rgba(155, 140, 255, 0.2), transparent 70%),
    var(--bg-2);
  border: 1px solid var(--border-strong);
}

.cta-panel h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.3rem);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 210px), 1fr));
  gap: 16px;
  margin: 26px 0 8px;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  counter-increment: step;
  padding: 18px;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 0.95rem;
}

.steps li::before {
  content: counter(step);
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  margin-bottom: 10px;
  border-radius: 50%;
  font-weight: 700;
  color: #0b0f1e;
  background: var(--grad);
}

.steps strong {
  display: block;
  color: var(--text);
  margin-bottom: 2px;
}

.faq {
  display: grid;
  gap: 12px;
  max-width: 820px;
}

.faq details {
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
}

.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 22px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  color: var(--cyan);
  font-size: 1.3rem;
  line-height: 1;
}

.faq details[open] summary::after {
  content: "−";
}

.faq details p {
  margin: 0;
  padding: 0 22px 20px;
  color: var(--text-2);
}

.success-chip {
  --chip: var(--green);
}

.promo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr));
  gap: 22px;
}

.promo {
  position: relative;
  display: grid;
  grid-template-columns: 42% 1fr;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  transition: transform 0.3s var(--ease), border-color 0.3s;
}

.promo:hover {
  color: var(--text);
  transform: translateY(-3px);
  border-color: var(--border-strong);
}

/* The text decides the card height; the image just fills it (height:0 + min-height trick) */
.promo {
  min-height: 190px;
}

.promo img {
  width: 100%;
  height: 0;
  min-height: 100%;
  object-fit: cover;
  object-position: center 30%;
}

.promo-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.promo-body h3 {
  font-size: 1.2rem;
  margin: 4px 0 0;
}

.promo-body p {
  margin: 0;
  font-size: 0.93rem;
  color: var(--muted);
}

.promo-body .link-arrow {
  margin-top: auto;
  color: var(--cyan);
}

@media (max-width: 480px) {
  .promo {
    grid-template-columns: 1fr;
  }

  .promo img {
    height: auto;
    aspect-ratio: 16 / 9;
    min-height: 0;
  }
}

/* ---------- Static pages ---------- */

.page-content {
  padding-bottom: 72px;
}

.page-content .prose > p:first-of-type::first-letter {
  float: none;
  font: inherit;
  padding: 0;
  color: inherit;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  gap: 18px;
  margin: 2em 0;
}

.value {
  padding: 22px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
}

.value h3 {
  font-size: 1.05rem;
  margin: 0 0 6px;
}

.value p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

/* ---------- 404 ---------- */

.not-found {
  display: grid;
  place-items: center;
  text-align: center;
  min-height: 70vh;
  padding-block: 64px;
}

.not-found .void {
  width: 180px;
  height: 180px;
  margin: 0 auto 32px;
  border-radius: 50%;
  background: #000;
  box-shadow:
    0 0 0 3px rgba(255, 190, 92, 0.9),
    0 0 30px 8px rgba(255, 150, 80, 0.55),
    0 0 90px 30px rgba(255, 122, 168, 0.25);
  animation: pulse 4s ease-in-out infinite;
}

.not-found h1 {
  font-size: clamp(3rem, 10vw, 6rem);
  margin-bottom: 8px;
}

.not-found p {
  color: var(--muted);
  max-width: 30rem;
  margin: 0 auto 28px;
}

@keyframes pulse {
  50% {
    box-shadow:
      0 0 0 3px rgba(255, 190, 92, 1),
      0 0 40px 12px rgba(255, 150, 80, 0.65),
      0 0 120px 40px rgba(255, 122, 168, 0.3);
  }
}

/* ---------- Footer ---------- */

.site-footer {
  margin-top: 40px;
  border-top: 1px solid var(--border);
  background: linear-gradient(to bottom, transparent, rgba(10, 15, 31, 0.8));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: 40px;
  padding-block: 56px 36px;
}

.footer-grid p {
  max-width: 22rem;
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.94rem;
}

.footer-grid h2 {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}

.footer-grid ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-grid li {
  margin-bottom: 8px;
}

.footer-grid a {
  color: var(--text-2);
  font-size: 0.95rem;
}

.footer-grid a:hover {
  color: var(--text);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-block: 22px 32px;
  border-top: 1px solid var(--border);
  font-size: 0.86rem;
  color: var(--faint);
}

@media (max-width: 820px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-grid > :first-child {
    grid-column: 1 / -1;
  }
}

/* ---------- Cookie notice ---------- */

.cookie-notice {
  position: fixed;
  left: 50%;
  bottom: 18px;
  z-index: 70;
  display: flex;
  align-items: center;
  gap: 18px;
  width: min(760px, calc(100% - 32px));
  padding: 16px 18px 16px 22px;
  border-radius: 16px;
  background: rgba(14, 20, 40, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow);
  font-size: 0.92rem;
  color: var(--text-2);
  transform: translate(-50%, 0);
  transition: transform 0.35s var(--ease), opacity 0.35s;
}

.cookie-notice[hidden] {
  display: none;
}

.cookie-notice.is-leaving {
  transform: translate(-50%, 140%);
  opacity: 0;
}

.cookie-notice p {
  margin: 0;
}

.cookie-notice .btn {
  flex: none;
  padding: 10px 18px;
}

@media (max-width: 560px) {
  .cookie-notice {
    flex-direction: column;
    align-items: stretch;
    text-align: left;
  }
}

/* ---------- Ad slots ----------
   Slots stay invisible until the ad network puts something inside.
   Add ?adslots=1 to any URL to outline all slots (debug mode, see main.js). */

.ad-slot {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-block: 32px;
  max-width: 100%;
  overflow: hidden;
}

.ad-slot:not(:has(*)) {
  display: none;
}

.ad-slot:has(> :not(script, style, noscript))::before {
  content: "Advertisement";
  margin-bottom: 6px;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}

.ad-slot--sidebar {
  margin-block: 0;
}

.show-ad-slots .ad-slot {
  display: flex;
  justify-content: center;
  min-height: 110px;
  border: 2px dashed rgba(255, 190, 92, 0.6);
  border-radius: 12px;
  background: repeating-linear-gradient(-45deg, rgba(255, 190, 92, 0.05) 0 12px, transparent 12px 24px);
}

.show-ad-slots .ad-slot--sidebar {
  min-height: 260px;
}

.show-ad-slots .ad-slot::after {
  content: "AD SLOT · " attr(data-ad-slot);
  position: absolute;
  top: 8px;
  left: 10px;
  font: 700 0.72rem var(--font-mono);
  letter-spacing: 0.06em;
  color: var(--amber);
}

/* ---------- Motion preferences ---------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}