/* Skyway Perspectives — bespoke skin over Bulma
   Palette, spacing and type are derived from the live site footprint
   and refined by the project seed. */

:root {
  --swp-ink: #12232e;
  --swp-ink-soft: #1c3442;
  --swp-void: #091520;
  --swp-body: #43525c;
  --swp-muted: #5a6a75;
  --swp-paper: #f7f4ee;
  --swp-paper-2: #efeae0;
  --swp-panel: #ffffff;
  --swp-line: #ded7c9;
  --swp-line-strong: #c4baa6;
  --swp-coral: #fe594a;
  --swp-coral-dark: #c0342b;
  --swp-amber: #d99a24;
  --swp-teal: #2a7f8f;
  --swp-good: #2f7d5a;
  --swp-radius: 3px;
  --swp-radius-btn: 5px;
  --swp-shadow: 5px 5px 0 rgba(18, 35, 46, 0.07);
  --swp-shadow-coral: 5px 5px 0 rgba(254, 89, 74, 0.16);
  --swp-wrap: 1200px;
  --swp-gutter: 24px;
  --swp-rhythm: 88px;
  --swp-head: "Poppins", "Segoe UI", sans-serif;
  --swp-text: "Rubik", "Segoe UI", sans-serif;

  --bulma-family-primary: var(--swp-head);
  --bulma-family-secondary: var(--swp-text);
  --bulma-family-code: "Cascadia Code", "Consolas", monospace;
  --bulma-primary: #fe594a;
  --bulma-link: #12232e;
  --bulma-radius: 3px;
  --bulma-radius-small: 2px;
  --bulma-body-color: #43525c;
  --bulma-strong-color: #12232e;
  --bulma-title-color: #12232e;
  --bulma-border: #ded7c9;
  --bulma-background: #f7f4ee;
}

* { box-sizing: border-box; }

html {
  background: var(--swp-paper);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body.swp-body {
  margin: 0;
  background: var(--swp-paper);
  color: var(--swp-body);
  font-family: var(--swp-text);
  font-size: 16px;
  line-height: 1.7;
  font-weight: 400;
  overflow-x: hidden;
}

::selection { background: var(--swp-coral); color: #fff; }

img { max-width: 100%; height: auto; }

.swp-body h1, .swp-body h2, .swp-body h3,
.swp-body h4, .swp-body h5, .swp-body h6 {
  font-family: var(--swp-head);
  color: var(--swp-ink);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.012em;
  margin: 0 0 0.6em;
}

.swp-body h1 { font-size: clamp(2.35rem, 4.7vw, 3.85rem); font-weight: 700; letter-spacing: -0.03em; }
.swp-body h2 { font-size: clamp(1.75rem, 3vw, 2.55rem); letter-spacing: -0.022em; }
.swp-body h3 { font-size: clamp(1.25rem, 1.8vw, 1.5rem); }
.swp-body h4 { font-size: 1.13rem; }
.swp-body h5 { font-size: 1rem; letter-spacing: 0.01em; }

.swp-body p { margin: 0 0 1.1em; }
.swp-body p:last-child { margin-bottom: 0; }

.swp-body a {
  color: var(--swp-ink);
  text-decoration: underline;
  text-decoration-color: rgba(254, 89, 74, 0.45);
  text-underline-offset: 3px;
  transition: color 0.18s ease, text-decoration-color 0.18s ease;
}
.swp-body a:hover { color: var(--swp-coral-dark); text-decoration-color: var(--swp-coral-dark); }

.swp-body strong { color: var(--swp-ink); font-weight: 600; }
.swp-body ul, .swp-body ol { margin: 0 0 1.15em 1.15em; padding: 0; }
.swp-body li { margin-bottom: 0.4em; }
.swp-body hr { border: 0; border-top: 1px solid var(--swp-line); margin: 2.4rem 0; }

.swp-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--swp-ink);
  color: #fff;
  padding: 12px 20px;
  z-index: 999;
  text-decoration: none;
}
.swp-skip:focus { left: 12px; top: 12px; color: #fff; }

:focus-visible {
  outline: 3px solid var(--swp-teal);
  outline-offset: 2px;
}

.swp-wrap {
  width: 100%;
  max-width: var(--swp-wrap);
  margin: 0 auto;
  padding-left: var(--swp-gutter);
  padding-right: var(--swp-gutter);
}

.swp-wrap--narrow { max-width: 860px; }

.swp-section { padding: var(--swp-rhythm) 0; }
.swp-section--tight { padding: calc(var(--swp-rhythm) * 0.62) 0; }
.swp-section--dark {
  background: var(--swp-ink);
  color: #c7d2d9;
  position: relative;
  overflow: hidden;
}
.swp-section--dark h2, .swp-section--dark h3, .swp-section--dark h4 { color: #fff; }
.swp-section--dark a { color: #fff; }
.swp-section--paper2 { background: var(--swp-paper-2); }
.swp-section--line { border-top: 1px solid var(--swp-line); }

.swp-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  font-family: var(--swp-text);
  font-size: 0.72rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.16em;
  text-transform: lowercase;
  color: var(--swp-coral-dark);
  font-weight: 600;
  margin: 0 0 1.1rem;
}
.swp-eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--swp-coral);
  flex: none;
}
.swp-section--dark .swp-eyebrow { color: var(--swp-amber); }
.swp-section--dark .swp-eyebrow::before { background: var(--swp-amber); }

.swp-lede {
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  line-height: 1.65;
  color: var(--swp-body);
  max-width: 62ch;
}
.swp-section--dark .swp-lede { color: #b9c6cd; }

.swp-kicker {
  font-family: var(--swp-text);
  font-size: 0.7rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.16em;
  color: var(--swp-muted);
  margin: 0 0 0.5rem;
}

/* ---------- buttons ---------- */
.swp-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55em;
  font-family: var(--swp-text);
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1;
  padding: 0.95em 1.5em;
  border-radius: var(--swp-radius-btn);
  border: 1px solid var(--swp-coral);
  background: var(--swp-coral);
  color: var(--swp-ink) !important;
  text-decoration: none !important;
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}
.swp-btn:hover { background: var(--swp-coral-dark); border-color: var(--swp-coral-dark); transform: translateY(-2px); box-shadow: var(--swp-shadow-coral); color: #fff; }
.swp-btn:active { transform: translateY(0); }
.swp-btn svg { width: 16px; height: 16px; }
.swp-btn--ghost {
  background: transparent;
  color: var(--swp-ink) !important;
  border-color: var(--swp-line-strong);
}
.swp-btn--ghost:hover { background: var(--swp-ink); border-color: var(--swp-ink); color: #fff !important; box-shadow: var(--swp-shadow); }
.swp-btn--onDark { background: transparent; border-color: rgba(255,255,255,0.4); color: #fff !important; }
.swp-btn--onDark:hover { background: #fff; color: var(--swp-ink) !important; border-color: #fff; box-shadow: none; }
.swp-btn--sm { padding: 0.72em 1.15em; font-size: 0.82rem; }
.swp-btn--wide { width: 100%; }

.swp-arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  font-family: var(--swp-text);
  font-size: 0.82rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.1em;
  font-weight: 600;
  color: var(--swp-coral-dark);
  text-decoration: none;
  border-bottom: 1px solid rgba(254,89,74,0.35);
  padding-bottom: 2px;
}
.swp-arrow-link:hover { color: var(--swp-ink); border-bottom-color: var(--swp-ink); }
.swp-arrow-link svg { width: 14px; height: 14px; }

/* ---------- top bar ---------- */
.swp-topbar {
  background: var(--swp-void);
  color: #9fb0ba;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
}
.swp-topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 38px;
  flex-wrap: wrap;
}
.swp-topbar__group { display: flex; align-items: center; gap: 1.35rem; flex-wrap: wrap; }
.swp-topbar a {
  color: #c9d5dc;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
}
.swp-topbar a:hover { color: #fff; }
.swp-topbar svg { width: 13px; height: 13px; opacity: 0.8; }
.swp-topbar__note { display: inline-flex; align-items: center; gap: 0.5em; }
.swp-topbar__dot { width: 6px; height: 6px; border-radius: 50%; background: var(--swp-amber); display: inline-block; }

/* ---------- header ---------- */
.swp-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(247, 244, 238, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--swp-line);
}
.swp-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 74px;
}
.swp-brand { display: inline-flex; align-items: center; gap: 0.7rem; text-decoration: none !important; color: var(--swp-ink) !important; }
.swp-brand__glyph { width: 38px; height: 38px; flex: none; }
.swp-brand__name { display: flex; flex-direction: column; line-height: 1.02; }
.swp-brand__name b { font-family: var(--swp-head); font-size: 1.02rem; font-weight: 700; letter-spacing: -0.01em; color: var(--swp-ink); }
.swp-brand__name span { font-family: var(--swp-text); font-size: 0.63rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--swp-coral-dark); font-weight: 500; }

.swp-nav { display: flex; align-items: center; gap: 0.15rem; }
.swp-nav__list { display: flex; align-items: center; gap: 0.15rem; list-style: none; margin: 0; padding: 0; }
.swp-nav__item { position: relative; }
.swp-nav__link, .swp-nav__trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  padding: 0.62em 0.72em;
  background: none;
  border: 0;
  font-family: var(--swp-text);
  font-size: 0.9rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.055em;
  font-weight: 500;
  color: var(--swp-ink);
  text-decoration: none !important;
  border-radius: var(--swp-radius);
  cursor: pointer;
  transition: color 0.15s ease, background 0.15s ease;
}
.swp-nav__link:hover, .swp-nav__trigger:hover { color: var(--swp-coral-dark); background: rgba(254,89,74,0.06); }
.swp-nav__link[aria-current="page"] { color: var(--swp-coral-dark); box-shadow: inset 0 -2px 0 var(--swp-coral); }
.swp-nav__trigger svg { width: 9px; height: 9px; transition: transform 0.18s ease; }
.swp-nav__item.is-open > .swp-nav__trigger svg { transform: rotate(180deg); }

.swp-nav__menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 268px;
  background: var(--swp-panel);
  border: 1px solid var(--swp-line);
  border-radius: var(--swp-radius);
  box-shadow: 0 18px 40px rgba(18,35,46,0.16);
  padding: 0.5rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.16s ease, transform 0.16s ease, visibility 0.16s;
  z-index: 90;
}
.swp-nav__menu--wide { min-width: 430px; column-count: 2; column-gap: 0.4rem; }
.swp-nav__item:hover > .swp-nav__menu,
.swp-nav__item:focus-within > .swp-nav__menu,
.swp-nav__item.is-open > .swp-nav__menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.swp-nav__menu a {
  display: block;
  padding: 0.55em 0.7em;
  border-radius: 2px;
  font-size: 0.84rem;
  color: var(--swp-ink) !important;
  text-decoration: none !important;
  line-height: 1.35;
  break-inside: avoid;
}
.swp-nav__menu a:hover { background: var(--swp-paper); color: var(--swp-coral-dark) !important; }
.swp-nav__menu .swp-menu-label {
  display: block;
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--swp-muted);
  padding: 0.7em 0.7em 0.25em;
  font-weight: 600;
  break-inside: avoid;
}

.swp-burger {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--swp-line-strong);
  border-radius: var(--swp-radius);
  background: transparent;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.swp-burger span { display: block; width: 18px; height: 2px; background: var(--swp-ink); position: relative; transition: background 0.15s; }
.swp-burger span::before, .swp-burger span::after { content: ""; position: absolute; left: 0; width: 18px; height: 2px; background: var(--swp-ink); transition: transform 0.2s ease; }
.swp-burger span::before { top: -6px; }
.swp-burger span::after { top: 6px; }
.swp-nav.is-open ~ .swp-burger span, .swp-burger[aria-expanded="true"] span { background: transparent; }
.swp-burger[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
.swp-burger[aria-expanded="true"] span::after { transform: translateY(-6px) rotate(-45deg); }

.swp-header__cta { display: inline-flex; }

/* ---------- hero ---------- */
.swp-hero {
  position: relative;
  padding: clamp(3rem, 6vw, 5.4rem) 0 clamp(2.4rem, 5vw, 4.6rem);
  background:
    radial-gradient(900px 420px at 78% 8%, rgba(42,127,143,0.10), transparent 62%),
    radial-gradient(700px 380px at 6% 92%, rgba(254,89,74,0.09), transparent 60%),
    var(--swp-paper);
  overflow: hidden;
}
.swp-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, rgba(18,35,46,0.045) 1px, transparent 1px), linear-gradient(to bottom, rgba(18,35,46,0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at 60% 40%, #000 0%, transparent 72%);
  pointer-events: none;
}
.swp-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: clamp(2rem, 4vw, 3.4rem);
  align-items: center;
}
.swp-hero__eyebrow { margin-bottom: 1.2rem; }
.swp-hero h1 { margin-bottom: 1.1rem; max-width: 16ch; }
.swp-hero h1 em { font-style: normal; color: var(--swp-coral-dark); }
.swp-hero__lede { font-size: clamp(1.02rem, 1.35vw, 1.16rem); max-width: 54ch; margin-bottom: 1.7rem; }
.swp-hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; }

.swp-hero__spec {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.5rem;
  margin-top: 2.1rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--swp-line);
  font-family: var(--swp-text);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--swp-muted);
}
.swp-hero__spec span { display: inline-flex; align-items: center; gap: 0.45em; }
.swp-hero__spec b { color: var(--swp-ink); font-weight: 500; }

.swp-hero__diagram {
  position: relative;
  border: 1px solid var(--swp-line);
  border-radius: var(--swp-radius);
  background: linear-gradient(180deg, #ffffff, #fbf9f4);
  box-shadow: var(--swp-shadow);
  padding: 1rem;
}
.swp-hero__diagram img { display: block; width: 100%; height: auto; }
.swp-hero__badge {
  position: absolute;
  right: -0.7rem;
  bottom: -0.9rem;
  background: var(--swp-amber);
  color: #2a1e05;
  font-family: var(--swp-text);
  font-size: 0.68rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.12em;
  font-weight: 600;
  padding: 0.5em 0.85em;
  border-radius: 2px;
  box-shadow: 3px 3px 0 rgba(18,35,46,0.12);
}

/* ---------- page masthead / breadcrumb ---------- */
.swp-masthead {
  position: relative;
  background: var(--swp-ink);
  color: #cfdae1;
  padding: clamp(2.6rem, 4.5vw, 4.1rem) 0 clamp(2.2rem, 4vw, 3.4rem);
  overflow: hidden;
}
.swp-masthead::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(105deg, transparent 30%, #000 100%);
  pointer-events: none;
}
.swp-masthead::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -70px;
  width: 320px;
  height: 320px;
  border: 1px solid rgba(254,89,74,0.35);
  transform: rotate(32deg);
  pointer-events: none;
}
.swp-masthead__inner { position: relative; z-index: 1; max-width: 74ch; }
.swp-masthead h1 { color: #fff; margin-bottom: 0.55rem; font-size: clamp(2rem, 3.6vw, 3.05rem); }
.swp-masthead .swp-lede { color: #b9c6cd; }
.swp-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  margin-bottom: 1.1rem;
  color: #8ea1ac;
}
.swp-crumbs a { color: #b9c6cd; text-decoration: none; }
.swp-crumbs a:hover { color: #fff; }
.swp-crumbs span { color: #6f8590; }
.swp-crumbs [aria-current="page"] { color: var(--swp-amber); }

/* ---------- generic cards / grids ---------- */
.swp-grid { display: grid; gap: var(--swp-gutter); }
.swp-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.swp-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.swp-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.swp-grid--sidebar { grid-template-columns: minmax(0, 250px) minmax(0, 1fr); gap: clamp(2rem, 4vw, 3.6rem); align-items: start; }

.swp-card {
  background: var(--swp-panel);
  border: 1px solid var(--swp-line);
  border-radius: var(--swp-radius);
  box-shadow: var(--swp-shadow);
  padding: 1.6rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  display: flex;
  flex-direction: column;
}
.swp-card:hover { transform: translate(-2px, -2px); box-shadow: 7px 7px 0 rgba(18,35,46,0.1); border-color: var(--swp-line-strong); }
.swp-card h3 { font-size: 1.14rem; margin-bottom: 0.5rem; }
.swp-card p { font-size: 0.93rem; margin-bottom: 1rem; }
.swp-card__icon {
  width: 42px; height: 42px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--swp-line);
  border-radius: 2px;
  background: var(--swp-paper);
  color: var(--swp-coral-dark);
  margin-bottom: 1.05rem;
}
.swp-card__icon svg { width: 21px; height: 21px; }
.swp-card__foot { margin-top: auto; }

.swp-card--link { text-decoration: none !important; }
.swp-card--link h3 { color: var(--swp-ink); }
.swp-card--link:hover h3 { color: var(--swp-coral-dark); }

.swp-card--flat { box-shadow: none; }
.swp-card--flat:hover { transform: none; box-shadow: none; }

.swp-card--dark {
  background: var(--swp-ink);
  border-color: rgba(255,255,255,0.12);
  color: #b9c6cd;
  box-shadow: 5px 5px 0 rgba(0,0,0,0.18);
}
.swp-card--dark h3 { color: #fff; }
.swp-card--dark .swp-card__icon { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.16); color: var(--swp-amber); }
.swp-card--dark p { color: #b9c6cd; }

.swp-num {
  font-family: var(--swp-head);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--swp-coral-dark);
  font-weight: 600;
  margin-bottom: 0.7rem;
  display: block;
}

/* ---------- split feature ---------- */
.swp-split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(2rem, 5vw, 4.4rem); align-items: center; }
.swp-split__media { border: 1px solid var(--swp-line); border-radius: var(--swp-radius); background: #fff; box-shadow: var(--swp-shadow); overflow: hidden; }
.swp-split__media img, .swp-split__media svg { display: block; width: 100%; height: auto; }

.swp-checks { list-style: none; margin: 1.4rem 0 0; padding: 0; display: grid; gap: 0.7rem; }
.swp-checks li { display: flex; gap: 0.7rem; align-items: flex-start; font-size: 0.95rem; }
.swp-checks svg { width: 18px; height: 18px; flex: none; margin-top: 3px; color: var(--swp-good); }

/* ---------- steps ---------- */
.swp-step {
  position: relative;
  padding: 1.5rem 1.4rem 1.4rem;
  background: var(--swp-panel);
  border: 1px solid var(--swp-line);
  border-top: 3px solid var(--swp-coral);
  border-radius: var(--swp-radius);
}
.swp-step__no { font-family: var(--swp-head); font-size: 0.72rem; letter-spacing: 0.14em; color: var(--swp-coral-dark); font-weight: 600; display: block; margin-bottom: 0.7rem; }
.swp-step h3 { font-size: 1.06rem; }
.swp-step p { font-size: 0.9rem; margin-bottom: 0; }

/* ---------- callout ---------- */
.swp-callout {
  border-left: 3px solid var(--swp-amber);
  background: #fdf6e7;
  padding: 1.1rem 1.3rem;
  border-radius: 0 var(--swp-radius) var(--swp-radius) 0;
  font-size: 0.92rem;
  color: #5a4a25;
  margin: 1.6rem 0;
}
.swp-callout strong { color: #3d3115; }
.swp-callout--info { border-left-color: var(--swp-teal); background: #eef5f6; color: #274a52; }
.swp-callout--info strong { color: #173238; }

/* ---------- article / prose ---------- */
.swp-prose { font-size: 1rem; }
.swp-prose h2 { margin-top: 2.2rem; }
.swp-prose h3 { margin-top: 1.8rem; }
.swp-prose > h2:first-child, .swp-prose > h3:first-child { margin-top: 0; }
.swp-prose ul li { margin-bottom: 0.45em; }
.swp-prose blockquote {
  margin: 1.8rem 0;
  padding: 0.4rem 0 0.4rem 1.3rem;
  border-left: 3px solid var(--swp-coral);
  color: var(--swp-ink-soft);
  font-style: normal;
}
.swp-prose code {
  font-family: var(--bulma-family-code);
  font-size: 0.86em;
  background: var(--swp-paper-2);
  padding: 0.12em 0.4em;
  border-radius: 2px;
  color: #8a3a32;
}
.swp-code {
  background: var(--swp-void);
  color: #d9e4ea;
  border-radius: var(--swp-radius);
  padding: 1.1rem 1.25rem;
  overflow-x: auto;
  font-family: var(--bulma-family-code);
  font-size: 0.82rem;
  line-height: 1.6;
  margin: 1.4rem 0;
}
.swp-code code { background: none; padding: 0; color: inherit; font-size: inherit; }

/* ---------- doc layout ---------- */
.swp-doc {
  display: grid;
  grid-template-columns: minmax(0, 236px) minmax(0, 1fr);
  gap: clamp(2rem, 4vw, 3.6rem);
  align-items: start;
}
.swp-aside {
  position: sticky;
  top: 96px;
  background: var(--swp-panel);
  border: 1px solid var(--swp-line);
  border-radius: var(--swp-radius);
  padding: 1.15rem 1.1rem;
}
.swp-aside h2 { font-size: 0.68rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--swp-muted); font-family: var(--swp-text); font-weight: 600; margin-bottom: 0.7rem; }
.swp-aside ul { list-style: none; margin: 0; padding: 0; }
.swp-aside li { margin-bottom: 0.1rem; }
.swp-aside a {
  display: block;
  padding: 0.42em 0.55em;
  font-size: 0.83rem;
  line-height: 1.35;
  color: var(--swp-ink) !important;
  text-decoration: none !important;
  border-left: 2px solid transparent;
  border-radius: 0 2px 2px 0;
}
.swp-aside a:hover { background: var(--swp-paper); border-left-color: var(--swp-coral); color: var(--swp-coral-dark) !important; }
.swp-aside a[aria-current="page"] { background: var(--swp-paper); border-left-color: var(--swp-coral); color: var(--swp-coral-dark) !important; font-weight: 500; }
.swp-aside__meta { margin-top: 1rem; padding-top: 0.9rem; border-top: 1px solid var(--swp-line); font-size: 0.72rem; color: var(--swp-muted); line-height: 1.5; }

.swp-article__head { border-bottom: 1px solid var(--swp-line); padding-bottom: 1.4rem; margin-bottom: 1.8rem; }
.swp-article__meta { display: flex; flex-wrap: wrap; gap: 0.4rem 1.1rem; font-size: 0.76rem; color: var(--swp-muted); margin-top: 1rem; }
.swp-article__meta span { display: inline-flex; align-items: center; gap: 0.4em; }
.swp-article__meta svg { width: 13px; height: 13px; }

.swp-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 1.6rem; }
.swp-tag {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.03em;
  padding: 0.32em 0.7em;
  border: 1px solid var(--swp-line);
  border-radius: 2px;
  color: var(--swp-ink) !important;
  text-decoration: none !important;
  background: var(--swp-paper);
}
.swp-tag:hover { border-color: var(--swp-coral); color: var(--swp-coral-dark) !important; }

.swp-figure {
  margin: 1.7rem 0;
  border: 1px solid var(--swp-line);
  border-radius: var(--swp-radius);
  background: #fff;
  padding: 1rem;
}
.swp-figure svg, .swp-figure img { display: block; width: 100%; height: auto; }
.swp-figure figcaption { font-size: 0.76rem; color: var(--swp-muted); margin-top: 0.75rem; padding-top: 0.65rem; border-top: 1px solid var(--swp-line); }

.swp-related { margin-top: 2.6rem; padding-top: 1.6rem; border-top: 1px solid var(--swp-line); }
.swp-related h2 { font-size: 1.05rem; margin-bottom: 0.9rem; }
.swp-related__grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.75rem; }
.swp-related a {
  display: block;
  padding: 0.85rem 1rem;
  border: 1px solid var(--swp-line);
  border-radius: var(--swp-radius);
  background: #fff;
  text-decoration: none !important;
  font-size: 0.88rem;
  color: var(--swp-ink) !important;
  transition: border-color 0.16s ease, transform 0.16s ease;
}
.swp-related a:hover { border-color: var(--swp-coral); transform: translateY(-1px); }
.swp-related small { display: block; font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--swp-muted); margin-bottom: 0.25rem; }

/* ---------- pager ---------- */
.swp-pager { display: flex; justify-content: space-between; gap: 0.75rem; margin-top: 2.4rem; flex-wrap: wrap; }
.swp-pager a {
  flex: 1 1 220px;
  border: 1px solid var(--swp-line);
  border-radius: var(--swp-radius);
  background: #fff;
  padding: 0.9rem 1rem;
  text-decoration: none !important;
  transition: border-color 0.16s ease;
}
.swp-pager a:hover { border-color: var(--swp-coral); }
.swp-pager small { display: block; font-size: 0.66rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--swp-muted); margin-bottom: 0.2rem; }
.swp-pager b { color: var(--swp-ink); font-weight: 500; font-size: 0.9rem; }

/* ---------- blog ---------- */
.swp-postcard { display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 1.6rem; align-items: center; background: var(--swp-panel); border: 1px solid var(--swp-line); border-radius: var(--swp-radius); overflow: hidden; box-shadow: var(--swp-shadow); text-decoration: none !important; color: inherit; }
a.swp-postcard:hover { border-color: var(--swp-line-strong); box-shadow: 7px 7px 0 rgba(18,35,46,0.1); }
.swp-postcard__art { height: 100%; min-height: 190px; background: var(--swp-ink); display: flex; align-items: center; justify-content: center; padding: 1rem; }
.swp-postcard__art svg { width: 100%; height: auto; }
.swp-postcard__body { padding: 1.5rem 1.6rem 1.5rem 0; }
.swp-postcard h2 { font-size: 1.3rem; margin-bottom: 0.5rem; }
.swp-postcard h2 a { text-decoration: none !important; }
.swp-postcard h2 a:hover { color: var(--swp-coral-dark); }
.swp-postcard p { font-size: 0.92rem; margin-bottom: 0.9rem; }
.swp-postmeta { display: flex; flex-wrap: wrap; gap: 0.35rem 1rem; font-size: 0.72rem; color: var(--swp-muted); margin-bottom: 0.7rem; }
.swp-postmeta span { display: inline-flex; align-items: center; gap: 0.35em; }
.swp-postmeta svg { width: 12px; height: 12px; }

.swp-feature-post { background: var(--swp-ink); color: #b9c6cd; border-radius: var(--swp-radius); padding: clamp(1.7rem, 4vw, 3rem); display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr); gap: 2rem; align-items: center; overflow: hidden; }
.swp-feature-post h2 { color: #fff; }
.swp-feature-post a { color: #fff; }
.swp-feature-post__art { border: 1px solid rgba(255,255,255,0.14); border-radius: var(--swp-radius); padding: 0.75rem; background: rgba(255,255,255,0.04); }
.swp-feature-post__art svg { display: block; width: 100%; height: auto; }

/* ---------- sidebar widgets ---------- */
.swp-widget { background: var(--swp-panel); border: 1px solid var(--swp-line); border-radius: var(--swp-radius); padding: 1.25rem; margin-bottom: 1.2rem; }
.swp-widget h2 { font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--swp-muted); font-family: var(--swp-text); font-weight: 600; margin-bottom: 0.8rem; }
.swp-widget ul { list-style: none; margin: 0; padding: 0; }
.swp-widget li { margin-bottom: 0.35rem; }
.swp-widget a { font-size: 0.86rem; text-decoration: none !important; }
.swp-widget a:hover { color: var(--swp-coral-dark); }

.swp-search { display: flex; gap: 0.4rem; }
.swp-search input { flex: 1; min-width: 0; }

/* ---------- forms ---------- */
.swp-field { margin-bottom: 1.1rem; }
.swp-label { display: block; font-family: var(--swp-text); font-size: 0.74rem; font-variant-caps: all-small-caps; letter-spacing: 0.1em; color: var(--swp-ink); font-weight: 600; margin-bottom: 0.4rem; }
.swp-input, .swp-textarea, .swp-select {
  width: 100%;
  font-family: var(--swp-text);
  font-size: 0.94rem;
  color: var(--swp-ink);
  background: #fff;
  border: 1px solid var(--swp-line-strong);
  border-radius: var(--swp-radius);
  padding: 0.72em 0.85em;
  transition: border-color 0.16s ease, box-shadow 0.16s ease;
}
.swp-input:focus, .swp-textarea:focus, .swp-select:focus {
  outline: none;
  border-color: var(--swp-teal);
  box-shadow: 0 0 0 3px rgba(42,127,143,0.16);
}
.swp-textarea { min-height: 150px; resize: vertical; }
.swp-help { font-size: 0.74rem; color: var(--swp-muted); margin-top: 0.35rem; }
.swp-error { font-size: 0.76rem; color: var(--swp-coral-dark); margin-top: 0.3rem; display: none; }
.swp-field.has-error .swp-input, .swp-field.has-error .swp-textarea { border-color: var(--swp-coral-dark); }
.swp-field.has-error .swp-error { display: block; }
.swp-formnote { font-size: 0.76rem; color: var(--swp-muted); margin-top: 0.9rem; }
.swp-success {
  display: none;
  border: 1px solid #bcd8c9;
  background: #eef7f1;
  color: #235c40;
  border-radius: var(--swp-radius);
  padding: 1rem 1.2rem;
  font-size: 0.9rem;
  margin-top: 1rem;
}
.swp-success.is-visible { display: block; }

/* ---------- footer ---------- */
.swp-footer { background: var(--swp-void); color: #93a5b0; padding: clamp(3rem, 5vw, 4.6rem) 0 1.6rem; }
.swp-footer a { color: #c2cfd7; text-decoration: none; }
.swp-footer a:hover { color: #fff; }
.swp-footer__grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1fr); gap: 2rem; padding-bottom: 2.6rem; border-bottom: 1px solid rgba(255,255,255,0.1); }
.swp-footer__brand { display: inline-flex; align-items: center; gap: 0.7rem; margin-bottom: 1rem; text-decoration: none; }
.swp-footer__brand b { font-family: var(--swp-head); font-size: 1.05rem; color: #fff; font-weight: 700; }
.swp-footer__brand span { display: block; font-size: 0.6rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--swp-amber); }
.swp-footer p { font-size: 0.86rem; line-height: 1.65; }
.swp-footer h2 { font-size: 0.68rem; letter-spacing: 0.18em; text-transform: uppercase; color: #fff; font-family: var(--swp-text); font-weight: 600; margin-bottom: 0.9rem; }
.swp-footer ul { list-style: none; margin: 0; padding: 0; }
.swp-footer li { margin-bottom: 0.42rem; }
.swp-footer li a { font-size: 0.86rem; }
.swp-footer__contact { font-size: 0.86rem; line-height: 1.7; }
.swp-footer__contact a { display: inline-flex; gap: 0.45em; align-items: center; }
.swp-footer__contact svg { width: 13px; height: 13px; opacity: 0.8; }
.swp-footer__bottom { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; padding-top: 1.4rem; font-size: 0.76rem; color: #7f929d; }
.swp-footer__stamp { font-family: var(--swp-text); font-size: 0.66rem; letter-spacing: 0.13em; text-transform: uppercase; color: #8ea1ac; }

.swp-totop {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--swp-line-strong);
  background: #fff;
  color: var(--swp-ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(18,35,46,0.16);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 70;
}
.swp-totop.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.swp-totop svg { width: 16px; height: 16px; }

/* ---------- reveal ---------- */
.swp-anim .swp-reveal {
  clip-path: inset(0 0 14% 0);
  opacity: 0;
  transform: translateY(12px);
  transition: clip-path 0.7s cubic-bezier(0.22, 0.61, 0.36, 1), opacity 0.55s ease, transform 0.55s ease;
}
.swp-anim .swp-reveal.is-shown { clip-path: inset(0 0 0 0); opacity: 1; transform: none; }

/* ---------- utility ---------- */
.swp-mt-0 { margin-top: 0 !important; }
.swp-mt-2 { margin-top: 2rem !important; }
.swp-mt-3 { margin-top: 3rem !important; }
.swp-mb-0 { margin-bottom: 0 !important; }
.swp-mb-2 { margin-bottom: 2rem !important; }
.swp-center { text-align: center; }
.swp-center .swp-lede { margin-left: auto; margin-right: auto; }
.swp-muted { color: var(--swp-muted); }
.swp-small { font-size: 0.84rem; }
.swp-divider { height: 1px; background: var(--swp-line); border: 0; margin: 0; }
.swp-sr {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.swp-stack { display: grid; gap: 1rem; }
.swp-inline { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; }

.swp-list-clean { list-style: none; margin: 0; padding: 0; }
.swp-list-clean li { margin: 0; }

.swp-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; table-layout: fixed; }
.swp-table th, .swp-table td { text-align: left; padding: 0.75rem 0.85rem; border-bottom: 1px solid var(--swp-line); overflow-wrap: anywhere; word-break: break-word; }
.swp-table th { width: 34%; }
.swp-table th { font-family: var(--swp-text); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--swp-muted); font-weight: 600; }
.swp-table tr:last-child td { border-bottom: 0; }

.swp-quote { border: 1px solid var(--swp-line); border-radius: var(--swp-radius); padding: 1.4rem 1.5rem; background: #fff; box-shadow: var(--swp-shadow); }
.swp-quote p { font-size: 1.02rem; color: var(--swp-ink-soft); }
.swp-quote cite { font-style: normal; font-size: 0.78rem; color: var(--swp-muted); }

.swp-statrow { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--swp-line); border: 1px solid var(--swp-line); border-radius: var(--swp-radius); overflow: hidden; }
.swp-statrow > div { background: #fff; padding: 1.4rem 1.5rem; }
.swp-statrow b { display: block; font-family: var(--swp-head); font-size: 1.55rem; color: var(--swp-ink); line-height: 1.1; }
.swp-statrow span { font-size: 0.78rem; color: var(--swp-muted); }

.swp-prose ul { list-style: disc; }
.swp-prose ol { list-style: decimal; }
.swp-card ul { list-style: disc; }
.swp-body .swp-checks,
.swp-body ul.swp-list-clean,
.swp-prose ul.swp-checks,
.swp-prose ul.swp-list-clean,
.swp-card ul.swp-list-clean,
.swp-card ul.swp-checks { list-style: none; margin-left: 0; }

/* ---------- responsive ---------- */
@media (max-width: 1023px) {
  :root { --swp-rhythm: 68px; }
  .swp-hero__grid { grid-template-columns: minmax(0, 1fr); gap: 2.4rem; }
  .swp-hero h1 { max-width: 20ch; }
  .swp-hero__diagram { max-width: 540px; margin-left: auto; margin-right: auto; }
  .swp-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .swp-footer__grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .swp-doc { grid-template-columns: minmax(0, 1fr); }
  .swp-aside { position: static; }
  .swp-feature-post { grid-template-columns: minmax(0, 1fr); }
  .swp-grid[style], .swp-doc[style], .swp-feature-post[style] { grid-template-columns: minmax(0, 1fr) !important; }
  .swp-grid--sidebar { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 1023px) {
  .swp-header__inner { min-height: 66px; }
  .swp-burger { display: inline-flex; }
  .swp-header__cta { display: none; }
  .swp-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    background: var(--swp-paper);
    border-bottom: 1px solid var(--swp-line);
    box-shadow: 0 18px 30px rgba(18,35,46,0.14);
    padding: 0.6rem var(--swp-gutter) 1.1rem;
    max-height: calc(100vh - 104px);
    overflow-y: auto;
  }
  .swp-nav.is-open { display: block; }
  .swp-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .swp-nav__item { border-bottom: 1px solid var(--swp-line); }
  .swp-nav__item:last-child { border-bottom: 0; }
  .swp-nav__link, .swp-nav__trigger { width: 100%; justify-content: space-between; padding: 0.9em 0.3em; font-size: 1rem; }
  .swp-nav__link[aria-current="page"] { box-shadow: inset 3px 0 0 var(--swp-coral); }
  .swp-nav__menu {
    position: static;
    display: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: 0;
    border-left: 2px solid var(--swp-line);
    border-radius: 0;
    margin: 0 0 0.6rem 0.6rem;
    padding: 0.2rem 0 0.2rem 0.5rem;
    min-width: 0;
    column-count: 1;
  }
  .swp-nav__item.is-open > .swp-nav__menu { display: block; }
  .swp-nav__item:hover > .swp-nav__menu { display: none; }
  .swp-nav__item.is-open:hover > .swp-nav__menu { display: block; }
  .swp-nav__menu--wide { column-count: 1; }
  .swp-footer__grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
}

@media (max-width: 640px) {
  :root { --swp-rhythm: 56px; --swp-gutter: 18px; }
  .swp-grid--2, .swp-grid--3, .swp-grid--4 { grid-template-columns: minmax(0, 1fr); }
  .swp-split { grid-template-columns: minmax(0, 1fr); }
  .swp-related__grid { grid-template-columns: minmax(0, 1fr); }
  .swp-statrow { grid-template-columns: minmax(0, 1fr); }
  .swp-postcard { grid-template-columns: minmax(0, 1fr); }
  .swp-table, .swp-table tbody, .swp-table tr, .swp-table th, .swp-table td { display: block; width: 100%; }
  .swp-table tr { padding: 0.55rem 0; border-bottom: 1px solid var(--swp-line); }
  .swp-table th, .swp-table td { padding: 0.12rem 0.85rem; border: 0; }
  .swp-table tr:last-child { border-bottom: 0; }
  .swp-postcard__art { min-height: 150px; }
  .swp-postcard__body { padding: 0 1.3rem 1.4rem; }
  .swp-feature-post { padding: 1.5rem; }
  .swp-footer__grid { grid-template-columns: minmax(0, 1fr); gap: 1.8rem; }
  .swp-topbar__inner { justify-content: center; }
  .swp-topbar__note { display: none; }
  .swp-brand__name b { font-size: 0.95rem; }
  .swp-pager a { flex-basis: 100%; }
  .swp-masthead::after { width: 200px; height: 200px; right: -90px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
  .swp-anim .swp-reveal { clip-path: none; opacity: 1; transform: none; }
}

@media print {
  .swp-topbar, .swp-header, .swp-footer, .swp-totop, .swp-aside { display: none !important; }
  body.swp-body { background: #fff; }
}