/* ============================================================================
   RING — presentation site COMPONENT LIBRARY
   Light corporate: white surfaces, navy text, brand-blue accents, generous
   whitespace. Built on assets/css/theme.css tokens (RingTheme palette).
   ============================================================================ */

/* ---- Reset / base ------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--text);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 { color: var(--text); line-height: 1.2; margin: 0 0 var(--space-m); font-weight: 700; }
p { margin: 0 0 var(--space-m); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; display: block; }
ul { margin: 0 0 var(--space-m); padding-left: 1.2em; }
li { margin: 0 0 var(--space-xs); }
strong { font-weight: 650; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 3px; }

/* ---- Layout ------------------------------------------------------------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--space-xl); }
.prose { max-width: var(--maxw-prose); }
.section { padding: var(--space-3xl) 0; }
.section--tight { padding: var(--space-2xl) 0; }
.section--alt { background: #fff; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.stack > * + * { margin-top: var(--space-l); }
.grid { display: grid; gap: var(--space-l); }
.center { text-align: center; }
.muted { color: var(--text-muted); }
.faint { color: var(--text-faint); }
.nowrap { white-space: nowrap; }
.hidden { display: none !important; }

.overline {
  text-transform: uppercase; letter-spacing: 0.08em; font-size: var(--fs-overline);
  font-weight: 700; color: var(--accent); margin-bottom: var(--space-s);
}

.section-head { max-width: 720px; margin-bottom: var(--space-2xl); }
.section-head h2 { font-size: var(--fs-h2); }
.section-head p { font-size: 1.05rem; color: var(--text-muted); margin-bottom: 0; }

/* ---- Top navigation ----------------------------------------------------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  height: var(--nav-h);
  background: rgba(255,255,255,0.88);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav__inner { height: 100%; display: flex; align-items: center; gap: var(--space-xl); }
.brand { display: flex; align-items: baseline; gap: 8px; font-weight: 800; letter-spacing: 0.02em; }
.brand__mark { font-size: 1.25rem; color: var(--accent-deep); }
.brand__by { font-size: var(--fs-caption); color: var(--text-faint); font-weight: 600; letter-spacing: 0.04em; }
.nav__links { display: flex; gap: var(--space-l); margin-left: auto; align-items: center; }
.nav__links a { color: var(--text-muted); font-weight: 600; font-size: var(--fs-small); }
.nav__links a:hover, .nav__links a.is-active { color: var(--accent); text-decoration: none; }
.nav__cta { margin-left: var(--space-m); }
.nav__links a.nav__present { color: var(--accent); font-weight: 700; }
.nav__links a.nav__present:hover { color: var(--accent-deep); }

/* ---- Buttons ------------------------------------------------------------ */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font: inherit; font-weight: 650; font-size: var(--fs-small);
  padding: 10px 18px; border-radius: var(--radius-control);
  border: 1px solid transparent; cursor: pointer; transition: all var(--dur) var(--ease);
  text-decoration: none; line-height: 1;
}
.btn:hover { text-decoration: none; }
.btn--primary { background: var(--accent); color: var(--text-on-accent); }
.btn--primary:hover { background: var(--accent-deep); color: #fff; }
.btn--ghost { background: #fff; color: var(--text); border-color: var(--border-strong); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn--onhero { background: rgba(255,255,255,0.16); color: #fff; border-color: rgba(255,255,255,0.4); }
.btn--onhero:hover { background: rgba(255,255,255,0.28); color: #fff; }
.btn--sm { padding: 6px 12px; font-size: var(--fs-caption); }

/* ---- Hero --------------------------------------------------------------- */
.hero { background: var(--hero-gradient); color: #fff; padding: var(--space-3xl) 0 0; overflow: hidden; }
.hero__eyebrow { color: var(--text-on-accent-muted); text-transform: uppercase; letter-spacing: 0.1em; font-size: var(--fs-caption); font-weight: 700; }
.hero h1 { color: #fff; font-size: var(--fs-display); max-width: 16ch; margin-top: var(--space-m); }
.hero__sub { color: var(--text-on-accent-muted); font-size: 1.15rem; max-width: 56ch; margin-top: var(--space-l); }
.hero__cta { display: flex; gap: var(--space-m); margin-top: var(--space-xl); flex-wrap: wrap; }
.hero__foot { margin-top: var(--space-3xl); padding-bottom: var(--space-2xl); }

/* KPI strip (sits on hero foot) */
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: var(--space-l); }
.kpi {
  background: rgba(255,255,255,0.10); border: 1px solid rgba(255,255,255,0.18);
  border-radius: var(--radius-card); padding: var(--space-l);
}
.kpi__value { font-size: var(--fs-kpi); font-weight: 800; color: #fff; line-height: 1; }
.kpi__label { color: var(--text-on-accent-muted); font-size: var(--fs-small); margin-top: 6px; }

/* ---- Status badges ------------------------------------------------------ */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: var(--fs-overline); font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em;
  padding: 3px 9px; border-radius: var(--radius-pill); white-space: nowrap;
}
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge--shipped  { background: var(--badge-shipped-bg);  color: var(--badge-shipped-fg); }
.badge--progress { background: var(--badge-progress-bg); color: var(--badge-progress-fg); }
.badge--roadmap  { background: var(--badge-roadmap-bg);  color: var(--badge-roadmap-fg); }

/* ---- Value-tier chips + legend ------------------------------------------ */
.tierbar { display: flex; flex-wrap: wrap; gap: var(--space-s); align-items: center; margin-bottom: var(--space-xl); }
.tierbar__label { font-size: var(--fs-caption); color: var(--text-muted); font-weight: 600; margin-right: var(--space-xs); }
.chip {
  font-size: var(--fs-caption); font-weight: 650; padding: 5px 12px; border-radius: var(--radius-pill);
  border: 1px solid var(--border-strong); background: #fff; color: var(--text-muted); cursor: pointer;
  transition: all var(--dur) var(--ease);
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.is-active { background: var(--accent); border-color: var(--accent); color: #fff; }
.tier-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; vertical-align: middle; }
.tier-dot--hero { background: var(--tier-hero); }
.tier-dot--core { background: var(--tier-core); }
.tier-dot--supporting { background: var(--tier-supporting); }
.tier-dot--engine { background: var(--tier-engine); }

/* ---- Feature cards ------------------------------------------------------ */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: var(--space-l); }
.card {
  position: relative; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-card); box-shadow: var(--shadow-card);
  padding: var(--space-l); padding-left: calc(var(--space-l) + 4px);
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
  display: flex; flex-direction: column;
}
.card::before { /* tier accent stripe */
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  border-radius: var(--radius-card) 0 0 var(--radius-card); background: var(--border-strong);
}
.card[data-tier="hero"]::before { background: var(--tier-hero); }
.card[data-tier="core"]::before { background: var(--tier-core); }
.card[data-tier="supporting"]::before { background: var(--tier-supporting); }
.card[data-tier="engine"]::before { background: var(--tier-engine); }
.card:hover { box-shadow: var(--shadow-card-hover); border-color: var(--border-strong); }

.card__head { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-s); margin-bottom: var(--space-s); }
.card__title { font-size: var(--fs-h3); font-weight: 700; margin: 0; }
.card__plain { color: var(--text-muted); margin: 0; }
.card__meta { display: flex; align-items: center; gap: var(--space-s); flex-wrap: wrap; margin-top: var(--space-m); }

/* expand affordance */
.card__toggle {
  margin-top: var(--space-m); align-self: flex-start; background: none; border: none; padding: 0;
  color: var(--accent); font: inherit; font-weight: 650; font-size: var(--fs-small); cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px;
}
.card__toggle .chev { transition: transform var(--dur) var(--ease); }
.card.is-open .card__toggle .chev { transform: rotate(90deg); }

/* expanded layer (operator benefit + vs-legacy, inline) */
.card__more {
  display: grid; grid-template-rows: 0fr; transition: grid-template-rows var(--dur) var(--ease);
}
.card.is-open .card__more { grid-template-rows: 1fr; }
.card__more-inner { overflow: hidden; }
.card.is-open .card__more-inner { padding-top: var(--space-m); margin-top: var(--space-m); border-top: 1px solid var(--border); }

.layer { margin-bottom: var(--space-m); }
.layer__label {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: var(--fs-overline); font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-faint); margin-bottom: 4px;
}
.layer--benefit .layer__label { color: var(--success); }
.layer--legacy .layer__label { color: var(--danger); }
.layer p { margin: 0; font-size: var(--fs-small); }

/* vs-legacy mini comparison inside a card */
.vsmini { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-s); margin-top: var(--space-xs); }
.vsmini > div { border-radius: var(--radius-control); padding: 8px 10px; font-size: var(--fs-caption); }
.vsmini__legacy { background: var(--danger-soft); }
.vsmini__legacy b { color: var(--danger-deep); }
.vsmini__ring { background: var(--success-soft); }
.vsmini__ring b { color: var(--success); }

/* ---- Slide-out detail panel (deepest technical layer) ------------------- */
.scrim {
  position: fixed; inset: 0; background: rgba(17,24,39,0.45); opacity: 0; visibility: hidden;
  transition: opacity var(--dur) var(--ease), visibility var(--dur) var(--ease); z-index: 90;
}
.scrim.is-open { opacity: 1; visibility: visible; }
.panel {
  position: fixed; top: 0; right: 0; height: 100vh; width: min(560px, 92vw);
  background: #fff; box-shadow: var(--shadow-panel); z-index: 100;
  transform: translateX(100%); transition: transform var(--dur) var(--ease);
  display: flex; flex-direction: column;
}
.panel.is-open { transform: translateX(0); }
.panel__head {
  padding: var(--space-l) var(--space-xl); border-bottom: 1px solid var(--border);
  display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-m);
}
.panel__title { font-size: var(--fs-h3); margin: 0; }
.panel__close {
  background: var(--card-inset); border: none; border-radius: var(--radius-control);
  width: 36px; height: 36px; font-size: 1.2rem; cursor: pointer; color: var(--text-muted); flex: none;
}
.panel__close:hover { background: var(--border); color: var(--text); }
.panel__body { padding: var(--space-xl); overflow-y: auto; }
.panel__body h4 { font-size: var(--fs-small); text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-faint); margin: var(--space-l) 0 var(--space-xs); }
.panel__body h4:first-child { margin-top: 0; }
.evidence {
  font-family: var(--font-mono); font-size: var(--fs-caption); color: var(--text-muted);
  background: var(--card-inset); border-radius: var(--radius-control); padding: 10px 12px;
  word-break: break-word;
}

/* ---- Comparison table --------------------------------------------------- */
.cmp { width: 100%; border-collapse: separate; border-spacing: 0; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-card); overflow: hidden; }
.cmp th, .cmp td { padding: 14px 18px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--border); font-size: var(--fs-small); }
.cmp thead th { background: var(--card-inset); font-size: var(--fs-overline); text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); }
.cmp tbody tr:last-child td { border-bottom: none; }
.cmp .col-dim { font-weight: 650; color: var(--text-muted); width: 20%; font-size: var(--fs-small); }
.cmp .col-legacy { color: var(--text-faint); background: transparent; font-size: var(--fs-caption); width: 33%; }
.cmp .col-ring { color: var(--text); background: var(--accent-soft); width: 47%; }
.cmp .col-ring b { color: var(--accent-deep); }
.cmp thead th.cmp__head-ring { background: var(--accent); color: #fff !important; }
.cmp thead th.t-cmp-legacy { color: var(--text-faint); font-weight: 600; }

/* ---- Roadmap groups ----------------------------------------------------- */
.roadmap-cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--space-l); align-items: start; }
.rmcol { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-card); box-shadow: var(--shadow-card); overflow: hidden; }
.rmcol__head { padding: var(--space-m) var(--space-l); border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 8px; font-weight: 700; }
.rmcol--shipped .rmcol__head { background: var(--badge-shipped-bg); color: var(--badge-shipped-fg); }
.rmcol--progress .rmcol__head { background: var(--badge-progress-bg); color: var(--badge-progress-fg); }
.rmcol--roadmap .rmcol__head { background: var(--badge-roadmap-bg); color: var(--badge-roadmap-fg); }
.rmcol ul { list-style: none; margin: 0; padding: var(--space-m) var(--space-l); }
.rmcol li { padding: 8px 0; border-bottom: 1px dashed var(--border); font-size: var(--fs-small); }
.rmcol li:last-child { border-bottom: none; }

/* ---- Screen mockups (CSS chrome) ---------------------------------------- */
.mock {
  background: #fff; border: 1px solid var(--border-strong); border-radius: var(--radius-card);
  box-shadow: var(--shadow-card-hover); overflow: hidden;
}
.mock__bar { display: flex; align-items: center; gap: 6px; padding: 8px 12px; background: var(--surface-dark); }
.mock__dot { width: 10px; height: 10px; border-radius: 50%; background: #555; }
.mock__dot:nth-child(1){ background:#ff5f57; } .mock__dot:nth-child(2){ background:#febc2e; } .mock__dot:nth-child(3){ background:#28c840; }
.mock__title { color: #cbd5e1; font-size: var(--fs-caption); margin-left: 8px; }
.mock__body { padding: var(--space-l); background: var(--surface); }

/* ---- Deployment / support cards ----------------------------------------- */
.infocards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px,1fr)); gap: var(--space-l); }
.infocard { background:#fff; border:1px solid var(--border); border-radius: var(--radius-card); padding: var(--space-l); box-shadow: var(--shadow-card); }
.infocard h3 { font-size: var(--fs-h3); }
.infocard .ic { font-size: 1.6rem; margin-bottom: var(--space-s); }

/* ---- Language switcher -------------------------------------------------- */
.lang { position: relative; }
.lang__btn {
  display: inline-flex; align-items: center; gap: 6px; background: #fff; border: 1px solid var(--border-strong);
  border-radius: var(--radius-control); padding: 6px 10px; font: inherit; font-size: var(--fs-caption);
  font-weight: 650; color: var(--text-muted); cursor: pointer;
}
.lang__btn:hover { border-color: var(--accent); color: var(--accent); }
.lang__menu {
  position: absolute; right: 0; top: calc(100% + 6px); background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius-card); box-shadow: var(--shadow-card-hover); padding: 6px; min-width: 200px;
  display: none; max-height: 60vh; overflow-y: auto; z-index: 60;
}
.lang.is-open .lang__menu { display: block; }
.lang__opt {
  display: flex; align-items: center; justify-content: space-between; gap: 8px; width: 100%;
  background: none; border: none; text-align: left; padding: 8px 10px; border-radius: var(--radius-control);
  font: inherit; font-size: var(--fs-small); color: var(--text); cursor: pointer;
}
.lang__opt:hover { background: var(--accent-soft); }
.lang__opt.is-active { color: var(--accent); font-weight: 700; }
.lang__opt .nativename { color: var(--text-faint); font-size: var(--fs-caption); }

/* ---- Footer ------------------------------------------------------------- */
.footer { background: var(--surface-dark); color: #cbd5e1; padding: var(--space-2xl) 0; font-size: var(--fs-small); }
.footer a { color: #cbd5e1; text-decoration: underline; }
.footer__grid { display: flex; flex-wrap: wrap; gap: var(--space-2xl); justify-content: space-between; }
.footer__note { color: #94a3b8; font-size: var(--fs-caption); margin-top: var(--space-l); }

/* ---- Machine-translation disclosure ribbon ------------------------------ */
.mt-note { background: var(--info-soft); color: var(--info); border-bottom: 1px solid var(--info);
  font-size: var(--fs-caption); font-weight: 600; text-align: center; padding: 6px var(--space-l); }

/* ---- Responsive --------------------------------------------------------- */
@media (max-width: 860px) {
  .nav__links { display: none; }
  .nav__links.is-open { display: flex; position: absolute; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; background: #fff; border-bottom: 1px solid var(--border); padding: var(--space-l); }
  .vsmini { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .container { padding: 0 var(--space-l); }
  .section { padding: var(--space-2xl) 0; }
}

/* ---- Owner outcomes band ------------------------------------------------ */
.outcomes { background: linear-gradient(180deg, #ffffff 0%, var(--accent-soft) 100%); }
.outcomes-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: var(--space-l); }
.outcome {
  background: #fff; border: 1px solid var(--border); border-left: 4px solid var(--accent);
  border-radius: var(--radius-card); padding: var(--space-l); box-shadow: var(--shadow-card);
  transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.outcome:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.outcome__ic { font-size: 1.9rem; line-height: 1; margin-bottom: var(--space-s); }
.outcome h3 { font-size: 1.08rem; margin: 0 0 6px; }
.outcome p { margin: 0; color: var(--text-muted); font-size: var(--fs-small); }

/* ---- Hero polish -------------------------------------------------------- */
.hero { position: relative; }
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(1100px 420px at 82% -12%, rgba(255,255,255,0.22), rgba(255,255,255,0) 60%);
}
.hero .container { position: relative; z-index: 1; }
.hero h1 { letter-spacing: -0.01em; }
.kpi { transition: transform var(--dur) var(--ease), background var(--dur) var(--ease); }
.kpi:hover { transform: translateY(-2px); background: rgba(255,255,255,0.16); }
.kpi__value { letter-spacing: -0.01em; }

/* ---- Print (PDF handout) ------------------------------------------------ */
@media print {
  .nav, .lang, .scrim, .panel, .card__toggle, .nav__cta, .mt-note { display: none !important; }
  .hero { background: #fff; color: var(--text); }
  .hero h1, .hero__sub, .kpi__value, .kpi__label { color: var(--text) !important; }
  .card__more { grid-template-rows: 1fr !important; }
  .card__more-inner { overflow: visible !important; }
  body { background: #fff; }
  .card, .cmp, .rmcol { box-shadow: none; }
  a { color: var(--text); text-decoration: none; }
}