/* =====================================================================
   DS SYSTEM — main stylesheet
   ===================================================================== */

/* ---- Reset / base ---- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh);
  color: var(--c-body);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--c-primary-600); text-decoration: none; }
a:hover { color: var(--c-primary-700); }
h1, h2, h3, h4 { color: var(--c-ink); line-height: var(--lh-tight); font-weight: var(--fw-bold); }
ul { list-style: none; padding: 0; }
.ds-ico { flex: none; }

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

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: var(--c-primary); color: #fff; padding: .6rem 1rem; border-radius: 0 0 var(--r-sm) 0;
}
.skip-link:focus { left: 0; color: #fff; }

/* ---- Buttons ---- */
.btn {
  --btn-bg: var(--c-primary); --btn-fg: #fff; --btn-bd: transparent;
  display: inline-flex; align-items: center; gap: .5rem; justify-content: center;
  font: inherit; font-weight: var(--fw-semibold); font-size: var(--fs-sm);
  padding: .72rem 1.25rem; border-radius: var(--r-pill);
  background: var(--btn-bg); color: var(--btn-fg); border: 1.5px solid var(--btn-bd);
  cursor: pointer; transition: transform .12s ease, box-shadow .15s ease, background .15s ease, color .15s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--sh); }
.btn .ds-ico { transition: transform .15s ease; }
.btn:hover .ds-ico { transform: translateX(2px); }
.btn-primary { --btn-bg: var(--c-primary); --btn-fg:#fff; box-shadow: 0 6px 18px rgba(30,95,208,.28); }
.btn-primary:hover { --btn-bg: var(--c-primary-600); color:#fff; }
.btn-outline { --btn-bg: transparent; --btn-fg: var(--c-primary-700); --btn-bd: var(--c-primary-300); }
.btn-outline:hover { --btn-bg: var(--c-primary-50); color: var(--c-primary-700); }
.btn-ghost { --btn-bg: transparent; --btn-fg: var(--c-body); --btn-bd: var(--c-line); }
.btn-ghost:hover { --btn-bg: var(--c-bg-soft); }
.btn-sm { padding: .5rem .95rem; font-size: var(--fs-sm); }
.btn-lg { padding: .9rem 1.6rem; font-size: var(--fs-md); }
.btn-on-dark { --btn-bg:#fff; --btn-fg: var(--c-primary-800); }
.btn-on-dark:hover { --btn-bg:#fff; color: var(--c-primary-900); }
.btn-outline-on-dark { --btn-bg: transparent; --btn-fg:#fff; --btn-bd: rgba(255,255,255,.45); }
.btn-outline-on-dark:hover { --btn-bg: rgba(255,255,255,.12); color:#fff; }

/* ---- Header ---- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.9); backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--c-line);
}
.header-inner { display: flex; align-items: center; gap: 1rem; height: var(--header-h); }
.brand { display: inline-flex; align-items: center; gap: .55rem; color: var(--c-ink); font-weight: var(--fw-x); letter-spacing: .02em; }
.brand:hover { color: var(--c-ink); }
.brand-name { font-size: 1.12rem; }
.primary-nav { display: flex; align-items: center; gap: 1.5rem; margin-left: auto; }
.nav-list { display: flex; align-items: center; gap: 1.4rem; }
.nav-list a { color: var(--c-body); font-weight: var(--fw-medium); font-size: var(--fs-sm); padding: .4rem 0; }
.nav-list a:hover { color: var(--c-primary-600); }
.header-actions { display: flex; align-items: center; gap: .8rem; }

/* language switcher (details/summary, no JS) */
.lang-switch { position: relative; }
.lang-switch summary {
  list-style: none; cursor: pointer; display: inline-flex; align-items: center; gap: .35rem;
  font-size: var(--fs-sm); color: var(--c-body); padding: .4rem .6rem; border: 1px solid var(--c-line);
  border-radius: var(--r-pill); background: var(--c-bg);
}
.lang-switch summary::-webkit-details-marker { display: none; }
.lang-switch summary:hover { border-color: var(--c-primary-300); color: var(--c-primary-700); }
.lang-globe { color: var(--c-muted); }
.lang-menu {
  position: absolute; right: 0; top: calc(100% + 8px); min-width: 150px;
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--r); box-shadow: var(--sh-lg);
  padding: .35rem; z-index: 50;
}
.lang-menu li a { display: block; padding: .55rem .7rem; border-radius: var(--r-sm); color: var(--c-body); font-size: var(--fs-sm); }
.lang-menu li a:hover { background: var(--c-bg-soft); color: var(--c-primary-700); }
.lang-menu li a.is-current { color: var(--c-primary-700); font-weight: var(--fw-semibold); background: var(--c-primary-50); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; width: 42px; height: 42px; align-items: center; justify-content: center; background: none; border: 1px solid var(--c-line); border-radius: var(--r-sm); cursor: pointer; margin-left: auto; }
.nav-toggle span { width: 20px; height: 2px; background: var(--c-ink); border-radius: 2px; transition: .2s; }

/* ---- Sections ---- */
.section { padding-block: clamp(3rem, 7vw, 6rem); }
.section-soft { background: var(--c-bg-soft); }
.section-head { max-width: 720px; margin: 0 auto clamp(2rem,4vw,3rem); }
.section-head.left { margin-inline: 0; }
.center { text-align: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: .4rem; font-size: var(--fs-xs); font-weight: var(--fw-bold);
  letter-spacing: .14em; text-transform: uppercase; color: var(--c-primary-600);
  background: var(--c-primary-50); padding: .35rem .7rem; border-radius: var(--r-pill);
}
.section-title { font-size: clamp(1.6rem, 3.4vw, var(--fs-2xl)); margin-top: .9rem; letter-spacing: .01em; }
.section-lead { color: var(--c-muted); font-size: var(--fs-md); margin-top: .9rem; }

/* ---- Hero ---- */
.hero { position: relative; overflow: hidden; background: radial-gradient(1100px 520px at 80% -10%, var(--c-dark-2), transparent 60%), linear-gradient(160deg, #0B1A3A 0%, #0E2350 55%, #123069 100%); color: var(--c-on-dark); }
.hero::after { content: ""; position: absolute; inset: 0; background: radial-gradient(600px 300px at 12% 110%, rgba(14,165,164,.18), transparent 60%); pointer-events: none; }
.hero-inner { position: relative; z-index: 1; padding-block: clamp(3.5rem, 9vw, 7rem); max-width: 820px; }
.hero .eyebrow { color: #fff; background: rgba(255,255,255,.12); }
.hero h1 { color: #fff; font-size: clamp(2rem, 5.2vw, var(--fs-3xl)); font-weight: var(--fw-x); letter-spacing: .01em; margin-top: 1.1rem; }
.hero-sub { color: var(--c-on-dark-muted); font-size: clamp(1rem, 2vw, var(--fs-md)); margin-top: 1.2rem; max-width: 660px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }
.hero-trust { display: flex; align-items: center; gap: .5rem; color: var(--c-on-dark-muted); font-size: var(--fs-sm); margin-top: 2rem; }
.hero-trust .ds-ico { color: var(--c-accent-400); }

/* ---- Card grid (ecosystem) ---- */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.25rem; }
.product-card {
  position: relative; background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--r-lg);
  padding: 1.5rem; box-shadow: var(--sh-sm); transition: transform .15s ease, box-shadow .2s ease, border-color .2s ease;
  display: flex; flex-direction: column; overflow: hidden;
}
.product-card::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; background: var(--accent, var(--c-primary)); }
.product-card:hover { transform: translateY(-4px); box-shadow: var(--sh-lg); border-color: transparent; }
.pc-icon { width: 50px; height: 50px; border-radius: var(--r); display: grid; place-items: center; color: var(--accent, var(--c-primary)); background: color-mix(in srgb, var(--accent, var(--c-primary)) 12%, #fff); margin-bottom: 1rem; }
.pc-name { font-size: var(--fs-lg); display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }
.pc-cat { color: var(--c-muted); font-size: var(--fs-xs); font-weight: var(--fw-semibold); letter-spacing: .06em; text-transform: uppercase; margin-top: .35rem; }
.pc-desc { color: var(--c-body); font-size: var(--fs-sm); margin-top: .8rem; flex: 1; }
.pc-link { display: inline-flex; align-items: center; gap: .35rem; margin-top: 1.1rem; font-weight: var(--fw-semibold); font-size: var(--fs-sm); color: var(--accent, var(--c-primary)); }
.pc-badge { font-size: var(--fs-xs); font-weight: var(--fw-bold); color: var(--c-accent-600); background: color-mix(in srgb, var(--c-accent) 14%, #fff); padding: .15rem .5rem; border-radius: var(--r-pill); }
.ico-xs { vertical-align: -2px; }

/* ---- What is (pillars) ---- */
.pillars { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px,1fr)); gap: 1.5rem; margin-top: 1rem; }
.pillar { padding: 1.25rem; }
.pillar-ico { width: 46px; height: 46px; border-radius: var(--r); display: grid; place-items: center; color: var(--c-primary-600); background: var(--c-primary-50); margin-bottom: .9rem; }
.pillar h3 { font-size: var(--fs-md); }
.pillar p { color: var(--c-muted); font-size: var(--fs-sm); margin-top: .5rem; }

/* ---- Problems ---- */
.problem-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px,1fr)); gap: 1rem; }
.problem-item { background: var(--c-surface); border: 1px solid var(--c-line); border-left: 4px solid var(--c-primary-400); border-radius: var(--r); padding: 1.1rem 1.25rem; }
.problem-q { color: var(--c-ink); font-weight: var(--fw-semibold); }
.problem-a { display: flex; align-items: flex-start; gap: .5rem; color: var(--c-body); font-size: var(--fs-sm); margin-top: .55rem; }
.problem-a .ds-ico { color: var(--c-success); margin-top: 2px; }

/* ---- Industries ---- */
.industry-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px,1fr)); gap: 1rem; }
.industry-item { display: flex; flex-direction: column; align-items: center; text-align: center; gap: .7rem; background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--r); padding: 1.5rem 1rem; transition: border-color .2s, transform .15s; }
.industry-item:hover { border-color: var(--c-primary-300); transform: translateY(-3px); }
.industry-ico { width: 48px; height: 48px; border-radius: var(--r-pill); display: grid; place-items: center; color: var(--c-primary-600); background: var(--c-primary-50); }
.industry-item span { font-weight: var(--fw-medium); color: var(--c-ink); font-size: var(--fs-sm); }

/* ---- Why (features) ---- */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px,1fr)); gap: 1.5rem; }
.feature-item { display: flex; gap: 1rem; }
.feature-ico { width: 44px; height: 44px; flex: none; border-radius: var(--r); display: grid; place-items: center; color: #fff; background: linear-gradient(135deg, var(--c-primary-500), var(--c-primary-700)); }
.feature-item h3 { font-size: var(--fs-md); }
.feature-item p { color: var(--c-muted); font-size: var(--fs-sm); margin-top: .35rem; }

/* ---- Future roadmap ---- */
.roadmap { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px,1fr)); gap: 1.25rem; counter-reset: step; }
.road-step { position: relative; background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--r-lg); padding: 1.5rem; }
.road-tag { display: inline-block; font-size: var(--fs-xs); font-weight: var(--fw-bold); letter-spacing: .08em; text-transform: uppercase; color: var(--c-accent-600); background: color-mix(in srgb, var(--c-accent) 12%, #fff); padding: .25rem .6rem; border-radius: var(--r-pill); }
.road-step h3 { font-size: var(--fs-md); margin-top: .8rem; }
.road-step p { color: var(--c-muted); font-size: var(--fs-sm); margin-top: .5rem; }

/* ---- Contact CTA ---- */
.cta-band { background: linear-gradient(135deg, var(--c-primary-700), var(--c-primary-900)); color: #fff; border-radius: var(--r-lg); padding: clamp(2rem, 5vw, 3.5rem); text-align: center; position: relative; overflow: hidden; }
.cta-band::after { content:""; position:absolute; right:-60px; bottom:-60px; width:260px; height:260px; background: radial-gradient(circle, rgba(14,165,164,.35), transparent 70%); }
.cta-band h2 { color: #fff; font-size: clamp(1.5rem, 3.5vw, var(--fs-2xl)); position: relative; }
.cta-band p { color: var(--c-on-dark-muted); margin-top: .9rem; position: relative; }
.cta-actions { display: flex; flex-wrap: wrap; gap: .8rem; justify-content: center; margin-top: 1.8rem; position: relative; }

/* ---- Footer ---- */
.site-footer { background: var(--c-dark); color: var(--c-on-dark-muted); padding-top: clamp(2.5rem,5vw,3.5rem); margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 2rem; }
.brand--footer { color: #fff; }
.brand--footer .brand-name { color: #fff; }
.footer-tagline { margin-top: .9rem; font-size: var(--fs-sm); max-width: 320px; color: var(--c-on-dark-muted); }
.footer-h { color: #fff; font-size: var(--fs-sm); letter-spacing: .04em; text-transform: uppercase; margin-bottom: .9rem; }
.footer-col ul { display: grid; gap: .55rem; }
.footer-col a { color: var(--c-on-dark-muted); font-size: var(--fs-sm); display: inline-flex; align-items: center; gap: .3rem; }
.footer-col a:hover { color: #fff; }
.footer-col a.is-current { color: #fff; font-weight: var(--fw-semibold); }
.footer-bottom { margin-top: 2.5rem; padding-block: 1.25rem; border-top: 1px solid rgba(255,255,255,.1); font-size: var(--fs-xs); }

/* ---- Responsive ---- */
@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .primary-nav {
    position: fixed; inset: var(--header-h) 0 auto 0; margin: 0; flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; border-bottom: 1px solid var(--c-line); box-shadow: var(--sh-lg);
    padding: .5rem var(--gutter) 1.25rem; transform: translateY(-12px); opacity: 0; visibility: hidden;
    transition: .2s ease;
  }
  .site-header.nav-open .primary-nav { transform: none; opacity: 1; visibility: visible; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-list a { padding: .85rem 0; border-bottom: 1px solid var(--c-line-2); }
  .header-actions { margin-top: 1rem; justify-content: space-between; }
  .site-header.nav-open .nav-toggle span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
  .site-header.nav-open .nav-toggle span:nth-child(2){ opacity: 0; }
  .site-header.nav-open .nav-toggle span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero-cta .btn, .cta-actions .btn { flex: 1 1 auto; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .btn:hover { transform: none; } }

/* ===================================================================
   Phase 2 — inner pages (products / about / contact)
   =================================================================== */
.page-hero { background: var(--c-bg-soft); border-bottom: 1px solid var(--c-line); padding-block: clamp(2.5rem,6vw,4rem); }
.page-hero .section-title { font-size: clamp(1.8rem,4vw,var(--fs-2xl)); margin-top: .8rem; }
.page-hero .section-lead { max-width: 640px; }

/* product detail */
.product-hero { padding-block: clamp(2.5rem,6vw,4rem); background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 9%, #fff), #fff); border-bottom: 1px solid var(--c-line); }
.breadcrumb { display: inline-flex; align-items: center; gap: .35rem; font-size: var(--fs-sm); color: var(--c-muted); margin-bottom: 1.2rem; }
.breadcrumb .flip { transform: rotate(180deg); }
.ph-top { display: flex; align-items: center; gap: 1rem; }
.ph-icon { width: 64px; height: 64px; border-radius: var(--r-lg); display: grid; place-items: center; color: #fff; background: var(--accent, var(--c-primary)); flex: none; }
.ph-cat { color: var(--c-muted); font-size: var(--fs-xs); font-weight: var(--fw-semibold); letter-spacing: .06em; text-transform: uppercase; }
.ph-name { font-size: clamp(1.6rem,4vw,var(--fs-2xl)); display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; }
.ph-overview { color: var(--c-body); font-size: var(--fs-md); max-width: 720px; margin-top: 1.1rem; }
.product-hero .hero-cta { margin-top: 1.6rem; }

.feature-check-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px,1fr)); gap: .6rem 1.5rem; }
.check-item { display: flex; align-items: flex-start; gap: .6rem; font-size: var(--fs-base); color: var(--c-ink); padding: .5rem 0; }
.check-item .ds-ico { color: var(--c-success); margin-top: 3px; }

.screens-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px,1fr)); gap: 1.25rem; }
.screen-ph { aspect-ratio: 16/10; border-radius: var(--r-lg); border: 1px dashed var(--c-line); background: repeating-linear-gradient(135deg,#fff,#fff 12px,var(--c-bg-soft) 12px,var(--c-bg-soft) 24px); display: grid; place-items: center; }
.screen-ph .ds-ico { color: color-mix(in srgb, var(--c-muted) 35%, #fff); }

/* about */
.about-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px,1fr)); gap: 1.75rem; }
.about-block h2 { font-size: var(--fs-lg); margin: .8rem 0 .5rem; }
.about-block p { color: var(--c-body); }

/* contact */
.contact-layout { display: grid; grid-template-columns: 1.7fr 1fr; gap: 2.5rem; align-items: start; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; }
.field { display: flex; flex-direction: column; gap: .4rem; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: var(--fs-sm); font-weight: var(--fw-medium); color: var(--c-ink); }
.field .req { color: var(--c-error); }
.field input, .field select, .field textarea { font: inherit; font-size: var(--fs-base); padding: .7rem .85rem; border: 1px solid var(--c-line); border-radius: var(--r-sm); background: #fff; color: var(--c-ink); width: 100%; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--c-primary-400); box-shadow: 0 0 0 3px var(--c-primary-50); }
.field.has-error input, .field.has-error textarea, .field.has-error select { border-color: var(--c-error); }
.err-msg { font-size: var(--fs-xs); color: var(--c-error); }
.checkbox { display: flex; gap: .6rem; align-items: flex-start; font-size: var(--fs-sm); color: var(--c-body); cursor: pointer; }
.checkbox input { width: auto; margin-top: 3px; }
.contact-form-wrap form button[type="submit"] { margin-top: 1.5rem; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.alert { display: flex; align-items: center; gap: .6rem; padding: 1rem 1.1rem; border-radius: var(--r); margin-bottom: 1.25rem; font-size: var(--fs-sm); }
.alert-success { background: color-mix(in srgb, var(--c-success) 10%, #fff); color: #14532d; border: 1px solid color-mix(in srgb, var(--c-success) 30%, #fff); }
.alert-success .ds-ico { color: var(--c-success); }
.alert-error { background: color-mix(in srgb, var(--c-error) 8%, #fff); color: #7f1d1d; border: 1px solid color-mix(in srgb, var(--c-error) 28%, #fff); }
.contact-aside { background: var(--c-bg-soft); border: 1px solid var(--c-line); border-radius: var(--r-lg); padding: 1.5rem; }
.contact-aside h2 { font-size: var(--fs-md); }
.contact-info-item { display: flex; align-items: center; gap: .5rem; margin-top: .9rem; }
.contact-info-item .ds-ico { color: var(--c-primary); }
.contact-note { color: var(--c-muted); font-size: var(--fs-sm); margin-top: .8rem; }

@media (max-width: 820px) { .contact-layout { grid-template-columns: 1fr; } }
@media (max-width: 520px) { .form-grid { grid-template-columns: 1fr; } }

/* legal pages */
.legal-prose { max-width: 820px; }
.legal-prose .legal-intro { color: var(--c-body); font-size: var(--fs-md); }
.legal-prose h2 { font-size: var(--fs-lg); margin: 2rem 0 .6rem; }
.legal-prose p { color: var(--c-body); }
.legal-prose .legal-note { margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid var(--c-line); color: var(--c-muted); font-size: var(--fs-sm); }