/* Layout: a calm editorial column with a technical "plan sheet" hero; daylight paper, ink, a north-sky blue for actions, luminaire amber for marks only. */
:root {
  --paper: #f3f5f4;
  --surface: #ffffff;
  --ink: #17202b;
  --ink-soft: #4b5664;
  --rule: #d3dadf;
  --accent: #1d5687;
  --accent-ink: #ffffff;
  --glow: #d99a12;
  --chip: #e6ebee;
  --plan-line: #17202b;
  --plan-fixture: #ffffff;

  --font-name: "Newsreader", Georgia, "Times New Roman", serif;
  --font-display: "Newsreader", Georgia, "Times New Roman", serif;
  --font-body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;

  --step--1: 0.875rem;
  --step-0: 1.0625rem;
  --step-1: 1.25rem;
  --step-2: 1.6rem;
  --step-3: 2.2rem;
  --step-4: clamp(2.4rem, 5.5vw, 3.6rem);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0f141a; --surface: #161d25; --ink: #e6eaee; --ink-soft: #a4afbb; --rule: #2a3440;
    --accent: #8ec3ea; --accent-ink: #0f141a; --glow: #f2b83c; --chip: #1d2630;
    --plan-line: #e6eaee; --plan-fixture: #0f141a; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0f141a; --surface: #161d25; --ink: #e6eaee; --ink-soft: #a4afbb; --rule: #2a3440;
  --accent: #8ec3ea; --accent-ink: #0f141a; --glow: #f2b83c; --chip: #1d2630;
  --plan-line: #e6eaee; --plan-fixture: #0f141a; color-scheme: dark;
}
:lang(ja) {
  --font-display: "IBM Plex Sans JP", "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  --font-body: "IBM Plex Sans JP", "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
}
:lang(ar) {
  --font-display: "IBM Plex Sans Arabic", "Noto Naskh Arabic", Tahoma, sans-serif;
  --font-body: "IBM Plex Sans Arabic", "Noto Naskh Arabic", Tahoma, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
h1, h2, h3 { text-wrap: balance; margin: 0; }
p { margin: 0; }

.wrap {
  max-width: 68rem;
  margin-inline: auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}

/* Header */
.site-header { border-bottom: 1px solid var(--rule); }
.site-header .wrap {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 0.75rem 1.5rem; padding-block: 0.9rem;
}
.brand { font-family: var(--font-name); font-size: 1.15rem; font-weight: 600; color: var(--ink); text-decoration: none; }
.nav { display: flex; flex-wrap: wrap; gap: 0.4rem 1.1rem; font-size: var(--step--1); }
.nav a { color: var(--ink-soft); text-decoration: none; }
.nav a:hover { color: var(--ink); }
.langs { display: flex; gap: 0.25rem; font-family: var(--font-mono); font-size: 0.8rem; }
.langs a, .langs span {
  padding: 0.15rem 0.45rem; border-radius: 3px; text-decoration: none; color: var(--ink-soft);
}
.langs [aria-current="page"] { background: var(--chip); color: var(--ink); }

/* Typography helpers */
.eyebrow {
  font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-soft); margin-bottom: 0.6rem;
}
:lang(ja) .eyebrow, :lang(ar) .eyebrow { letter-spacing: 0; text-transform: none; font-family: var(--font-body); font-weight: 500; }
h2 { font-family: var(--font-display); font-size: var(--step-3); font-weight: 600; line-height: 1.15; margin-bottom: 1.25rem; }
h3 { font-family: var(--font-display); font-size: var(--step-1); font-weight: 600; line-height: 1.3; }
.measure { max-width: 40rem; }
.muted { color: var(--ink-soft); }

/* Hero */
.hero .wrap {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 2.5rem 3.5rem; align-items: start; padding-block: 3.5rem 3rem;
}
.hero h1 { font-family: var(--font-name); font-size: var(--step-4); font-weight: 600; line-height: 1.05; letter-spacing: -0.01em; }
.hero .lede {
  font-family: var(--font-display); font-size: var(--step-2); line-height: 1.3; margin-top: 1rem;
}
:lang(ja) .hero .lede, :lang(ar) .hero .lede { font-weight: 500; }
.hero .intro { margin-top: 1.25rem; color: var(--ink-soft); max-width: 34rem; }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.75rem; }
.btn {
  display: inline-block; padding: 0.6rem 1.1rem; border-radius: 4px; font-size: var(--step--1); font-weight: 600;
  text-decoration: none; border: 1px solid var(--accent);
}
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-secondary { color: var(--accent); }
.btn:hover { text-decoration: none; filter: brightness(1.08); }

/* Plan figure */
.plan { background: var(--surface); border: 1px solid var(--rule); border-radius: 6px; padding: 1rem; min-width: 0; margin: 0; }
.plan-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 0.5rem 1rem; margin-bottom: 0.75rem; }
.plan-head h3 { font-size: var(--step-1); }
.seg { display: inline-flex; border: 1px solid var(--rule); border-radius: 4px; overflow: hidden; }
.seg button {
  font: inherit; font-size: 0.82rem; padding: 0.35rem 0.7rem; border: 0; background: transparent; color: var(--ink-soft); cursor: pointer;
}
.seg button + button { border-inline-start: 1px solid var(--rule); }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.plan canvas { width: 100%; aspect-ratio: 5 / 3; display: block; border-radius: 3px; background: var(--chip); }
.legend { margin-top: 0.75rem; font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-soft); }
.legend-bar {
  height: 8px; border-radius: 2px; margin-block: 0.35rem 0.2rem;
  background: linear-gradient(to right, #1e2a8c 0%, #2563eb 10%, #06b6d4 20%, #22c55e 30%, #facc15 50%, #f97316 75%, #dc2626 100%);
}
[dir="rtl"] .legend-bar, [dir="rtl"] .legend-scale { direction: ltr; }
.legend-scale { position: relative; height: 1.1em; }
.legend-scale span { position: absolute; transform: translateX(-50%); white-space: nowrap; }
.legend-scale span:first-child { transform: none; }
.legend-scale span:last-child { transform: translateX(-100%); }
.targets { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.85rem; }
.targets li {
  list-style: none; font-family: var(--font-mono); font-size: 0.75rem; background: var(--chip); color: var(--ink);
  padding: 0.2rem 0.5rem; border-radius: 3px; direction: ltr;
}
.targets { padding: 0; margin-bottom: 0; }
.plan figcaption { font-size: 0.8rem; color: var(--ink-soft); margin-top: 0.75rem; line-height: 1.5; }

/* Sections */
.section { border-top: 1px solid var(--rule); }
.section > .wrap { padding-block: 3.5rem; }

.about-grid { display: grid; grid-template-columns: minmax(0, 15rem) minmax(0, 1fr); gap: 2.5rem; align-items: start; }
.portrait { border-radius: 4px; aspect-ratio: 4 / 5; object-fit: cover; width: 100%; max-width: 15rem; }
.stack { display: grid; gap: 1rem; }
.facts { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 0.45rem 1.5rem; margin: 1.5rem 0 0; font-size: var(--step--1); }
.facts dt { font-family: var(--font-mono); font-size: 0.78rem; color: var(--ink-soft); padding-top: 0.1rem; }
:lang(ja) .facts dt, :lang(ar) .facts dt { font-family: var(--font-body); }
.facts dd { margin: 0; }

.lines { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
.line { background: var(--surface); border: 1px solid var(--rule); border-radius: 6px; padding: 1.25rem; display: grid; gap: 0.75rem; align-content: start; min-width: 0; }
.status { font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-soft); display: flex; align-items: center; gap: 0.45rem; }
:lang(ja) .status, :lang(ar) .status { font-family: var(--font-body); font-size: 0.78rem; }
.status::before { content: ""; width: 0.55rem; height: 0.55rem; border-radius: 50%; background: var(--glow); }
.status.next::before { background: transparent; border: 1.5px solid var(--glow); }
.line p { font-size: var(--step--1); color: var(--ink-soft); }
.stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.6rem; margin: 0.25rem 0 0; }
.stats div { border-top: 1px solid var(--rule); padding-top: 0.4rem; }
.stats dt { font-family: var(--font-mono); font-size: 1.35rem; font-weight: 500; color: var(--ink); font-variant-numeric: tabular-nums; }
.stats dd { margin: 0; font-size: 0.78rem; color: var(--ink-soft); line-height: 1.35; }
.finding { font-size: var(--step--1); border-inline-start: 2px solid var(--glow); padding-inline-start: 0.75rem; color: var(--ink) !important; }

.pubs { list-style: none; padding: 0; margin: 0; display: grid; gap: 1.1rem; max-width: 46rem; }
.pubs li { display: grid; grid-template-columns: 9rem minmax(0, 1fr); gap: 0.25rem 1.25rem; }
.pubs .kind { font-family: var(--font-mono); font-size: 0.75rem; color: var(--ink-soft); padding-top: 0.2rem; }
:lang(ja) .pubs .kind, :lang(ar) .pubs .kind { font-family: var(--font-body); font-size: 0.8rem; }
.pubs cite { font-style: italic; }
.pubs a { overflow-wrap: anywhere; }

.areas { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5rem 2rem; margin-bottom: 2.25rem; }
.areas div { display: grid; gap: 0.35rem; align-content: start; }
.areas p { font-size: var(--step--1); color: var(--ink-soft); }
.ways { display: flex; flex-wrap: wrap; gap: 0.5rem; padding: 0; margin: 0; }
.ways li { list-style: none; border: 1px solid var(--rule); border-radius: 999px; padding: 0.3rem 0.85rem; font-size: var(--step--1); }

.email-box { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem; margin-top: 1.5rem; }
.email {
  font-family: var(--font-mono); font-size: 1.05rem; background: var(--surface); border: 1px solid var(--rule);
  padding: 0.55rem 0.85rem; border-radius: 4px; user-select: all; direction: ltr; overflow-wrap: anywhere;
}
.copy { font: inherit; font-size: var(--step--1); font-weight: 600; padding: 0.55rem 0.95rem; border-radius: 4px; border: 1px solid var(--accent); background: transparent; color: var(--accent); cursor: pointer; }
.links { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; margin-top: 1.25rem; font-size: var(--step--1); }

.site-footer { border-top: 1px solid var(--rule); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.75rem; padding-block: 1.5rem 2rem; font-size: 0.82rem; color: var(--ink-soft); }

@media (max-width: 880px) {
  .hero .wrap { grid-template-columns: minmax(0, 1fr); padding-block: 2.5rem 2rem; }
  .lines, .areas { grid-template-columns: minmax(0, 1fr); }
  .about-grid { grid-template-columns: minmax(0, 1fr); }
  .portrait { max-width: 11rem; }
}
@media (max-width: 520px) {
  .pubs li { grid-template-columns: minmax(0, 1fr); }
  .section > .wrap { padding-block: 2.5rem; }
}