/* ============================================================
   LINKCLIC LTD — design system
   Paper base · ink navy · single electric-cobalt accent
   Signature: node-and-line "click into place" motif
   ============================================================ */

:root {
  --paper:      #F5F4EF;
  --paper-2:    #EEEBE2;
  --paper-3:    #E7E3D8;
  --ink:        #15181F;
  --ink-soft:   #4B515D;
  --ink-faint:  #8A8E97;
  --line:       #D9D6CB;
  --line-soft:  #E4E1D7;
  --accent:     #2A4CF4;
  --accent-deep:#1B34C0;
  --accent-tint:#E7EAFE;
  --white:      #FFFFFF;

  --radius:     14px;
  --radius-sm:  9px;
  --maxw:       1140px;

  --ff-display: "Bricolage Grotesque", "Segoe UI", sans-serif;
  --ff-body:    "IBM Plex Sans", system-ui, sans-serif;
  --ff-mono:    "IBM Plex Mono", ui-monospace, monospace;

  --shadow-sm:  0 1px 2px rgba(21,24,31,.05), 0 1px 1px rgba(21,24,31,.04);
  --shadow-md:  0 18px 40px -22px rgba(21,24,31,.30);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--ff-body);
  font-size: 17px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--ff-display);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0;
}

p { margin: 0; }
a { color: inherit; text-decoration: none; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

.eyebrow {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 9px;
}
.eyebrow::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-tint);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--ff-body);
  font-weight: 600;
  font-size: 15px;
  padding: 13px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .16s ease, background .16s ease, border-color .16s ease, color .16s ease;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-deep); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); transform: translateY(-1px); }
.btn .arw { transition: transform .18s ease; }
.btn:hover .arw { transform: translateX(3px); }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(245,244,239,.82);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line-soft);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-family: var(--ff-display); font-weight: 800; font-size: 20px; letter-spacing: -0.03em; }
.brand .mark { width: 26px; height: 26px; flex: 0 0 auto; }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { font-size: 15px; color: var(--ink-soft); transition: color .15s ease; }
.nav-links a:hover { color: var(--ink); }
.nav-cta { display: inline-flex; align-items: center; gap: 22px; }
.menu-btn { display: none; background: none; border: 0; cursor: pointer; padding: 6px; }

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; padding: 92px 0 84px; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 56px; align-items: center; }
.hero h1 { font-size: clamp(2.6rem, 5.4vw, 4.15rem); margin: 22px 0 0; }
.hero h1 .hl { color: var(--accent); }
.hero .lede { margin-top: 24px; font-size: 1.18rem; color: var(--ink-soft); max-width: 33ch; }
.hero-actions { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero-meta { margin-top: 34px; display: flex; gap: 26px; font-family: var(--ff-mono); font-size: 12.5px; color: var(--ink-faint); letter-spacing: .04em; flex-wrap: wrap; }
.hero-meta b { color: var(--ink); font-weight: 600; }

/* node diagram (signature) */
.diagram { position: relative; aspect-ratio: 1 / 1; width: 100%; }
.diagram svg { width: 100%; height: 100%; overflow: visible; }
.node-label { font-family: var(--ff-mono); font-size: 11px; fill: var(--ink-soft); letter-spacing: .04em; }
.flow-dot { animation: flow 4.5s linear infinite; }
@keyframes flow { to { offset-distance: 100%; } }
.pulse-ring { transform-origin: center; animation: pulse 3s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity:.9; r:6; } 50% { opacity:.35; r:9; } }

/* ---------- sections ---------- */
section { padding: 78px 0; }
.section-head { max-width: 620px; margin-bottom: 46px; }
.section-head h2 { font-size: clamp(1.9rem, 3.6vw, 2.7rem); margin-top: 16px; }
.section-head p { margin-top: 16px; color: var(--ink-soft); font-size: 1.08rem; }

/* about / value */
.value { background: var(--paper-2); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.vcard { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 26px; }
.vcard .vn { font-family: var(--ff-mono); font-size: 12px; color: var(--accent); letter-spacing: .12em; }
.vcard h3 { font-size: 1.28rem; margin: 14px 0 10px; letter-spacing: -0.01em; }
.vcard p { color: var(--ink-soft); font-size: .99rem; }

/* ---------- products ---------- */
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.pcard {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px 28px;
  display: flex; flex-direction: column;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.pcard:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #c7c3b6; }
.pcard.flagship { grid-column: 1 / -1; flex-direction: row; align-items: stretch; gap: 40px; background: var(--ink); color: #EDEEF2; border-color: var(--ink); }
.pcard.flagship:hover { border-color: var(--accent); }
.pcard.flagship .flag-main { flex: 1.4; display: flex; flex-direction: column; }
.pcard.flagship .flag-side { flex: 1; border-left: 1px solid rgba(255,255,255,.14); padding-left: 40px; display: flex; flex-direction: column; justify-content: center; }
.pcard.flagship h3, .pcard.flagship .price { color: #fff; }
.pcard.flagship .pdesc, .pcard.flagship .feat li { color: #B9BDC9; }
.pcard.flagship .feat li::before { color: var(--accent); }

.ptag { font-family: var(--ff-mono); font-size: 11.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }
.pcard h3 { font-size: 1.5rem; margin: 12px 0 6px; }
.pcard .pdesc { color: var(--ink-soft); font-size: .98rem; min-height: 48px; }
.price-row { display: flex; align-items: baseline; gap: 8px; margin: 20px 0 4px; }
.price { font-family: var(--ff-mono); font-size: 2rem; font-weight: 600; letter-spacing: -0.02em; }
.price .cur { font-size: 1.05rem; color: var(--ink-faint); vertical-align: super; margin-right: 1px; }
.once { font-family: var(--ff-mono); font-size: 11.5px; color: var(--ink-faint); letter-spacing: .08em; text-transform: uppercase; }
.feat { list-style: none; margin: 18px 0 24px; padding: 0; display: grid; gap: 10px; }
.feat li { position: relative; padding-left: 26px; font-size: .95rem; color: var(--ink-soft); }
.feat li::before { content: "→"; position: absolute; left: 0; color: var(--accent); font-family: var(--ff-mono); }
.pcard .btn { margin-top: auto; justify-content: center; }
.delivery-note { font-family: var(--ff-mono); font-size: 11.5px; color: var(--ink-faint); margin-top: 14px; letter-spacing: .02em; }

/* ---------- how it works ---------- */
.how { background: var(--paper-2); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--paper); }
.step { padding: 32px 30px; border-right: 1px solid var(--line); }
.step:last-child { border-right: 0; }
.step .sn { font-family: var(--ff-mono); font-size: 13px; color: var(--accent); letter-spacing: .1em; }
.step h3 { font-size: 1.24rem; margin: 14px 0 9px; }
.step p { color: var(--ink-soft); font-size: .97rem; }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-list { display: grid; gap: 4px; }
.crow { display: flex; gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.crow:first-child { border-top: 1px solid var(--line); }
.crow .clabel { font-family: var(--ff-mono); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-faint); width: 96px; flex: 0 0 auto; padding-top: 3px; }
.crow .cval { font-size: 1.04rem; }
.crow .cval a:hover { color: var(--accent); }
.contact-card { background: var(--ink); color: #E9EBF0; border-radius: var(--radius); padding: 40px 36px; }
.contact-card h3 { color: #fff; font-size: 1.6rem; }
.contact-card p { color: #B9BDC9; margin-top: 14px; }
.contact-card .btn { margin-top: 26px; }

/* ---------- footer ---------- */
.site-footer { background: var(--ink); color: #AEB2BD; padding: 60px 0 34px; }
.foot-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.12); }
.site-footer .brand { color: #fff; }
.foot-about { margin-top: 18px; max-width: 34ch; font-size: .96rem; color: #9297A3; }
.foot-col h4 { font-family: var(--ff-mono); font-size: 12px; font-weight: 500; letter-spacing: .12em; text-transform: uppercase; color: #7E828D; }
.foot-col ul { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 11px; }
.foot-col a { color: #C3C6CE; font-size: .96rem; }
.foot-col a:hover { color: #fff; }
.foot-legal { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; padding-top: 26px; font-family: var(--ff-mono); font-size: 12px; color: #7E828D; letter-spacing: .03em; }
.foot-legal .reg { color: #9297A3; }

/* ---------- policy pages ---------- */
.policy { padding: 70px 0 90px; }
.policy-wrap { max-width: 760px; margin: 0 auto; }
.policy h1 { font-size: clamp(2.1rem, 4vw, 3rem); }
.policy .updated { font-family: var(--ff-mono); font-size: 12.5px; color: var(--ink-faint); margin-top: 14px; letter-spacing: .04em; }
.policy h2 { font-size: 1.4rem; margin: 44px 0 12px; letter-spacing: -0.01em; }
.policy h3 { font-size: 1.12rem; margin: 26px 0 8px; }
.policy p, .policy li { color: var(--ink-soft); }
.policy p { margin: 12px 0; }
.policy ul { margin: 12px 0; padding-left: 22px; display: grid; gap: 8px; }
.policy a { color: var(--accent); }
.policy a:hover { text-decoration: underline; }
.back-link { font-family: var(--ff-mono); font-size: 13px; color: var(--accent); display: inline-flex; gap: 8px; margin-bottom: 30px; }
.note-box { background: var(--accent-tint); border: 1px solid #C9D2FD; border-radius: var(--radius-sm); padding: 18px 20px; margin: 22px 0; font-size: .95rem; color: #24306e; }

/* ---------- responsive ---------- */
@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .diagram { max-width: 420px; }
  .value-grid, .prod-grid, .steps { grid-template-columns: 1fr; }
  .step { border-right: 0; border-bottom: 1px solid var(--line); }
  .step:last-child { border-bottom: 0; }
  .pcard.flagship { flex-direction: column; gap: 26px; }
  .pcard.flagship .flag-side { border-left: 0; border-top: 1px solid rgba(255,255,255,.14); padding-left: 0; padding-top: 26px; }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .foot-top { grid-template-columns: 1fr; gap: 30px; }
  .nav-links { display: none; }
  .menu-btn { display: inline-flex; }
  .nav-links.open { display: flex; position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--paper); border-bottom: 1px solid var(--line); padding: 8px 28px 18px; }
  .nav-links.open a { padding: 12px 0; border-bottom: 1px solid var(--line-soft); }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto !important; transition: none !important; }
}

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }