/* Altalus Design System — components. Uses semantic tokens only. */

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(var(--space-7), 9vw, var(--space-9)); }
.section--alt { background: var(--bg-alt); }
.section--inverse { background: var(--bg-inverse); color: var(--fg-inverse); --fg-muted: #9fb0c0; --border: #1b3349; }
.section__head { max-width: 46rem; margin-bottom: var(--space-7); }
.section__head p { color: var(--fg-muted); font-size: var(--step-1); }
.eyebrow { display: inline-flex; align-items: center; gap: var(--space-2); font-size: var(--step--1); font-weight: 650; letter-spacing: 0.12em; text-transform: uppercase; color: var(--brand); margin-bottom: var(--space-3); }
.eyebrow::before { content: ""; width: 1.6rem; height: 2px; background: var(--accent); border-radius: 2px; }
.grid { display: grid; gap: var(--space-5); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr)); }
.stack > * + * { margin-top: var(--space-4); }
.lead { font-size: var(--step-1); color: var(--fg-muted); max-width: 40rem; }

/* ---------- Buttons ---------- */
.btn { --_bg: var(--surface); --_fg: var(--fg); --_bd: var(--border-strong);
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  padding: 0.8rem 1.4rem; min-height: 2.9rem; border-radius: var(--radius-pill);
  background: var(--_bg); color: var(--_fg); border: 1px solid var(--_bd);
  font: inherit; font-weight: 650; font-size: var(--step-0); text-decoration: none; cursor: pointer;
  transition: transform var(--dur-press) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out), background-color var(--dur-fast) ease; }
.btn:active { transform: scale(0.97); }
.btn--primary { --_bg: var(--brand); --_fg: var(--brand-contrast); --_bd: var(--brand); }
@media (hover: hover) and (pointer: fine) {
  .btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); color: var(--_fg); }
  .btn:active { transform: scale(0.97); }
  .btn--primary:hover { --_bg: var(--brand-strong); }
}
.btn--ghost { --_bg: transparent; }
.btn--lg { padding: 1rem 1.8rem; min-height: 3.3rem; }
.section--inverse .btn--ghost { --_fg: var(--fg-inverse); --_bd: #2d4a63; }

/* ---------- Header / nav ---------- */
.site-header { position: sticky; top: 0; z-index: 50; height: var(--header-h);
  background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--border); }
.site-header .container { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: var(--space-5); }
.brand-mark { display: inline-flex; align-items: center; gap: var(--space-3); color: var(--fg); text-decoration: none; font-weight: 780; font-size: 1.2rem; letter-spacing: -0.02em; }
.brand-mark svg { width: 2rem; height: 2rem; color: var(--brand); }
.brand-mark:hover { color: var(--fg); }
.nav { display: flex; align-items: center; gap: var(--space-2); }
.nav a:not(.btn) { color: var(--fg); text-decoration: none; padding: var(--space-2) var(--space-3); border-radius: var(--radius-pill); font-weight: 560; font-size: 0.97rem; }
.nav a:not(.btn):hover { background: var(--brand-soft); color: var(--brand-strong); }
.nav-toggle { display: none; }
@media (max-width: 52rem) {
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; width: 2.9rem; height: 2.9rem; border-radius: var(--radius-md); border: 1px solid var(--border-strong); background: var(--surface); color: var(--fg); cursor: pointer; }
  .nav { position: absolute; inset: var(--header-h) 0 auto 0; flex-direction: column; align-items: stretch; padding: var(--space-4) var(--gutter) var(--space-5); background: var(--bg); border-bottom: 1px solid var(--border); box-shadow: var(--shadow-md); display: none; }
  .nav[data-open="true"] { display: flex; }
  .nav a:not(.btn) { padding: var(--space-3) var(--space-4); }
}

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding-block: clamp(var(--space-8), 12vw, 8.5rem) clamp(var(--space-7), 8vw, var(--space-9)); isolation: isolate; }
.hero::before { content: ""; position: absolute; inset: -20% -10% auto -10%; height: 140%; z-index: -2;
  background: radial-gradient(60% 50% at 80% 10%, color-mix(in srgb, var(--brand) 22%, transparent), transparent 70%),
              radial-gradient(40% 40% at 10% 0%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%); }
.hero__art { position: absolute; inset: 0; z-index: -1; color: var(--brand); opacity: 0.16; pointer-events: none; mask-image: linear-gradient(to bottom, #000 40%, transparent); }
.hero__art svg { width: 100%; height: 100%; }
.hero h1 { max-width: 16ch; }
.hero .lead { margin-bottom: var(--space-6); }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.hero--split .container { display: grid; gap: var(--space-7); align-items: center; }
@media (min-width: 62rem) { .hero--split .container { grid-template-columns: 1.15fr 0.85fr; } }

/* ---------- Cards ---------- */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: var(--space-6); box-shadow: var(--shadow-sm);
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out), border-color var(--dur-fast) ease; }
@media (hover: hover) and (pointer: fine) {
  .card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--border-strong); }
}
.card p { color: var(--fg-muted); margin-bottom: 0; }
.card__icon { width: 3rem; height: 3rem; display: grid; place-items: center; border-radius: var(--radius-md); background: var(--brand-soft); color: var(--brand); margin-bottom: var(--space-5); }
.card__icon svg { width: 1.5rem; height: 1.5rem; }
.card--link { text-decoration: none; color: inherit; display: block; }
.card--link:hover { color: inherit; }
.card__more { display: inline-flex; gap: var(--space-2); margin-top: var(--space-4); font-weight: 650; color: var(--brand); }

/* ---------- Badges / stats / lists ---------- */
.badge { display: inline-flex; align-items: center; gap: var(--space-2); padding: 0.25rem 0.75rem; border-radius: var(--radius-pill); background: var(--brand-soft); color: var(--brand-strong); font-size: var(--step--1); font-weight: 650; border: 1px solid color-mix(in srgb, var(--brand) 25%, transparent); }
.badge--soon { background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--fg); border-color: color-mix(in srgb, var(--accent) 40%, transparent); }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr)); gap: var(--space-5); }
.stat strong { display: block; font-size: var(--step-3); font-weight: 760; letter-spacing: -0.03em; color: var(--brand); line-height: 1.05; }
.stat span { color: var(--fg-muted); font-size: var(--step--1); }
.checklist li { position: relative; padding-left: 1.9rem; margin-bottom: var(--space-3); }
.checklist li::before { content: ""; position: absolute; left: 0; top: 0.35em; width: 1.15rem; height: 1.15rem; border-radius: 50%; background: var(--brand-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23139aa6' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m5 12 5 5 9-10'/%3E%3C/svg%3E") center/70% no-repeat; }

/* ---------- Steps ---------- */
.steps { counter-reset: step; display: grid; gap: var(--space-5); grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); }
.steps li { counter-increment: step; position: relative; padding-top: var(--space-6); border-top: 2px solid var(--border-strong); }
.steps li::before { content: "0" counter(step); position: absolute; top: -0.9rem; left: 0; background: var(--bg); padding-right: var(--space-3); font-weight: 760; color: var(--brand); font-variant-numeric: tabular-nums; }
.section--alt .steps li::before { background: var(--bg-alt); }
.steps p { color: var(--fg-muted); margin: 0; }

/* ---------- Visual panel (device / dashboard mock) ---------- */
.panel { background: var(--surface-raised); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); overflow: hidden; }
.panel__bar { display: flex; gap: 6px; padding: var(--space-3) var(--space-4); border-bottom: 1px solid var(--border); }
.panel__bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--border-strong); }
.panel__body { padding: var(--space-5); display: grid; gap: var(--space-4); }
.metric { display: flex; justify-content: space-between; align-items: baseline; gap: var(--space-4); padding: var(--space-3) var(--space-4); border-radius: var(--radius-md); background: var(--bg-alt); }
.metric span { color: var(--fg-muted); font-size: var(--step--1); }
.metric b { font-size: var(--step-1); font-variant-numeric: tabular-nums; }
.metric b small { color: var(--fg-muted); font-weight: 500; }
.bar { height: 8px; border-radius: 99px; background: var(--border); overflow: hidden; }
.bar > i { display: block; height: 100%; width: var(--v, 50%); background: linear-gradient(90deg, var(--brand), var(--accent)); border-radius: inherit; }

/* ---------- CTA band ---------- */
.cta { border-radius: var(--radius-lg); padding: clamp(var(--space-6), 6vw, var(--space-8)); background: linear-gradient(135deg, var(--brand-700), var(--brand-600) 55%, color-mix(in srgb, var(--brand-500) 80%, var(--accent))); color: #fff; display: grid; gap: var(--space-5); position: relative; overflow: hidden; }
.cta h2 { color: #fff; max-width: 20ch; margin: 0; }
.cta p { color: #e3f4f6; margin: 0; max-width: 38rem; }
.cta .btn { --_bg: #fff; --_fg: var(--ink-900); --_bd: #fff; justify-self: start; }

/* ---------- Footer ---------- */
.site-footer { background: var(--bg-inverse); color: var(--fg-inverse); padding-block: var(--space-8) var(--space-6); font-size: 0.95rem; }
.site-footer a { color: #cfe3ef; text-decoration: none; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.footer-grid { display: grid; gap: var(--space-6); grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr)); margin-bottom: var(--space-7); }
.footer-grid h4 { font-size: var(--step--1); letter-spacing: 0.1em; text-transform: uppercase; color: #8aa3b8; margin-bottom: var(--space-3); }
.footer-grid li { margin-bottom: var(--space-2); }
.footer-note { border-top: 1px solid #16304a; padding-top: var(--space-5); color: #8aa3b8; display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-3); font-size: var(--step--1); }
.site-footer .brand-mark { color: #fff; }

/* ---------- Reveal on scroll (progressive enhancement) ---------- */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity var(--dur-reveal) var(--ease-out), transform var(--dur-reveal) var(--ease-out); }
.js .reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .js .reveal { opacity: 1; transform: none; transition: none; } }