/* ============================================================
   Andronik — first version
   Premium, calm, technically credible. CI-aligned.
   ============================================================ */

:root {
  --navy: #071827;
  --deep-blue: #071E55;
  --signal-blue: #0A8FBF;
  --cyan: #20C8F8;
  --cyan-glow: #50D9FF;
  --ice: #F4FBFE;
  --slate: #5B6B76;
  --white: #FFFFFF;

  --bg: var(--ice);
  --bg-soft: #EAF5FA;
  --surface: var(--white);
  --ink: var(--navy);
  --ink-soft: var(--slate);
  --border: #D8E5EE;

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --shadow-1: 0 1px 0 rgba(7, 24, 39, .04), 0 8px 20px -12px rgba(7, 24, 39, .12);
  --shadow-2: 0 24px 60px -32px rgba(7, 24, 39, .25);

  --container: 1180px;
  --section-y: clamp(72px, 9vw, 128px);

  --font: 'Inter', 'Manrope', 'Sora', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: var(--navy);
    --bg-soft: #0B2233;
    --surface: #0E2738;
    --ink: var(--ice);
    --ink-soft: #9AB1BD;
    --border: #15324A;
    --shadow-1: 0 1px 0 rgba(0,0,0,.2), 0 8px 24px -12px rgba(0,0,0,.5);
    --shadow-2: 0 24px 60px -28px rgba(0,0,0,.6);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--signal-blue); }

img, svg { display: block; max-width: 100%; height: auto; }

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 36px);
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  margin: 0 0 .4em;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.15;
  color: var(--ink);
}
h1 { font-size: clamp(40px, 5.6vw, 64px); letter-spacing: -0.025em; }
h2 { font-size: clamp(28px, 3.2vw, 40px); }
h3 { font-size: 20px; }
.eyebrow {
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: 12px;
  font-weight: 600;
  color: var(--signal-blue);
  margin: 0 0 18px;
}
.lead {
  font-size: clamp(17px, 1.6vw, 20px);
  color: var(--ink-soft);
  max-width: 64ch;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, background .2s ease, border-color .2s ease, color .2s ease;
}
.btn:hover { transform: translateY(-1px); color: inherit; }
.btn-primary {
  background: var(--cyan);
  color: var(--navy);
  box-shadow: 0 8px 24px -10px rgba(32, 200, 248, .55);
}
.btn-primary:hover { background: var(--cyan-glow); }
.btn-secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--border);
}
.btn-secondary:hover { border-color: var(--signal-blue); color: var(--signal-blue); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  padding: 10px 14px;
}
.btn-ghost:hover { color: var(--signal-blue); }
.btn .arrow { transition: transform .2s ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo {
  height: 34px;
  width: auto;
  display: block;
}
.brand-logo.dark-only { display: none; }
@media (prefers-color-scheme: dark) {
  .brand-logo.light-only { display: none; }
  .brand-logo.dark-only { display: block; }
}

/* Language toggle */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-left: 6px;
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
}
.lang-toggle button {
  appearance: none;
  background: transparent;
  border: 0;
  padding: 4px 6px;
  border-radius: 999px;
  font: inherit;
  color: var(--ink-soft);
  cursor: pointer;
  transition: color .15s ease, background .15s ease;
}
.lang-toggle button:hover { color: var(--ink); }
.lang-toggle button.active { color: var(--navy); background: var(--cyan); }
@media (prefers-color-scheme: dark) {
  .lang-toggle button.active { color: var(--navy); background: var(--cyan); }
}
@media (max-width: 820px) {
  .lang-toggle { margin-left: 0; }
}
.nav { display: flex; align-items: center; gap: 4px; }
.nav a { padding: 8px 12px; font-size: 14.5px; color: var(--ink-soft); font-weight: 500; border-radius: 8px; }
.nav a:hover { color: var(--ink); background: var(--bg-soft); }
.nav .btn { margin-left: 8px; padding: 10px 16px; font-size: 14px; }
.nav-toggle { display: none; }

@media (max-width: 820px) {
  .nav a:not(.btn) { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  padding: clamp(56px, 8vw, 104px) 0 var(--section-y);
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: clamp(36px, 6vw, 72px);
  align-items: center;
}
@media (max-width: 940px) { .hero-grid { grid-template-columns: 1fr; } }

.hero h1 .accent { color: var(--signal-blue); }
.hero .lead { margin-top: 18px; }
.hero-ctas { display: flex; gap: 12px; margin-top: 32px; flex-wrap: wrap; }
.hero-meta { margin-top: 28px; color: var(--ink-soft); font-size: 14px; display: flex; gap: 18px; flex-wrap: wrap; }
.hero-meta span { display: inline-flex; align-items: center; gap: 8px; }
.hero-meta .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 4px color-mix(in srgb, var(--cyan) 18%, transparent); }

/* Hero visual: official A-mark on a soft cyan halo */
.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 460px;
  margin-inline: auto;
  width: 100%;
  display: grid;
  place-items: center;
}
.hero-visual::before {
  content: "";
  position: absolute;
  inset: 6%;
  border-radius: 50%;
  background:
    radial-gradient(58% 58% at 50% 50%, color-mix(in srgb, var(--cyan) 30%, transparent), transparent 72%);
  filter: blur(30px);
  z-index: 0;
}
.hero-mark {
  position: relative;
  z-index: 1;
  width: 76%;
  height: auto;
  display: block;
  filter: drop-shadow(0 10px 30px rgba(7, 24, 39, .15));
}

/* ---------- Sections ---------- */
section { padding: var(--section-y) 0; }
.section-head { max-width: 720px; margin-bottom: 56px; }

/* ---------- Trust strip ---------- */
.trust {
  padding: clamp(28px, 4vw, 40px) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}
.trust .container { display: flex; align-items: center; gap: clamp(20px, 4vw, 48px); flex-wrap: wrap; }
.trust-label { font-size: 13px; text-transform: uppercase; letter-spacing: .14em; color: var(--ink-soft); font-weight: 600; }
.trust ul { display: flex; gap: clamp(16px, 3vw, 32px); list-style: none; padding: 0; margin: 0; flex-wrap: wrap; }
.trust li { font-weight: 600; font-size: 15px; color: var(--ink); }
.trust li::before { content: "▲ "; color: var(--signal-blue); margin-right: 6px; font-size: 11px; vertical-align: middle; }

/* ---------- Services ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 980px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px)  { .services-grid { grid-template-columns: 1fr; } }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 28px;
  box-shadow: var(--shadow-1);
  display: flex; flex-direction: column; gap: 14px;
  transition: transform .15s ease, border-color .2s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--signal-blue) 35%, var(--border)); box-shadow: var(--shadow-2); }
.card .icon {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: color-mix(in srgb, var(--cyan) 14%, transparent);
  color: var(--signal-blue);
}
.card h3 { margin: 0; }
.card p { margin: 0; color: var(--ink-soft); font-size: 15px; }
.card ul { margin: 4px 0 0; padding-left: 18px; color: var(--ink-soft); font-size: 14.5px; }
.card ul li + li { margin-top: 6px; }
.card ul li::marker { color: var(--signal-blue); }

/* ---------- Approach ---------- */
.approach { background: var(--bg-soft); }
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  counter-reset: step;
}
@media (max-width: 980px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }
.step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 26px;
  position: relative;
}
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  font-feature-settings: "tnum";
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--signal-blue);
  display: block;
  margin-bottom: 14px;
}
.step h3 { font-size: 18px; }
.step p { margin: 6px 0 12px; color: var(--ink-soft); font-size: 15px; }
.step .deliverable {
  font-size: 13px;
  color: var(--ink);
  font-weight: 600;
  border-top: 1px dashed var(--border);
  padding-top: 12px;
}
.step .deliverable span { color: var(--ink-soft); font-weight: 500; }

.approach-pillars {
  margin-top: 36px;
  display: flex; flex-wrap: wrap; gap: 12px;
}
.pill {
  font-size: 13px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--ink-soft);
}
.pill strong { color: var(--ink); }

/* ---------- Use cases ---------- */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
@media (max-width: 800px) { .usecase-grid { grid-template-columns: 1fr; } }
.usecase {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 28px;
  display: grid;
  gap: 14px;
}
.usecase h3 { font-size: 18px; }
.usecase .row { display: grid; grid-template-columns: 100px 1fr; gap: 10px; align-items: baseline; font-size: 15px; }
.usecase .row dt { font-size: 12px; text-transform: uppercase; letter-spacing: .14em; color: var(--signal-blue); font-weight: 700; }
.usecase .row dd { margin: 0; color: var(--ink-soft); }
.usecase .row dd.outcome { color: var(--ink); font-weight: 600; }
@media (max-width: 480px) { .usecase .row { grid-template-columns: 1fr; gap: 2px; } }

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
}
@media (max-width: 880px) { .about-grid { grid-template-columns: 1fr; } }
.about-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: clamp(28px, 4vw, 44px);
  box-shadow: var(--shadow-1);
}
.about-card p + p { margin-top: 12px; color: var(--ink-soft); }
.values {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-top: 22px;
}
.values .pill { background: color-mix(in srgb, var(--cyan) 8%, var(--bg)); }

/* ---------- Contact ---------- */
.contact {
  background:
    radial-gradient(80% 100% at 50% 0%, color-mix(in srgb, var(--cyan) 16%, transparent), transparent 60%),
    var(--bg-soft);
  border-top: 1px solid var(--border);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
}
@media (max-width: 880px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-info p { color: var(--ink-soft); }
.contact-info a { color: var(--signal-blue); font-weight: 600; }
.contact-meta {
  margin-top: 20px;
  display: grid; gap: 10px;
  font-size: 14.5px;
  color: var(--ink-soft);
}
.contact-meta strong { color: var(--ink); }

form.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: clamp(24px, 3vw, 32px);
  box-shadow: var(--shadow-1);
  display: grid;
  gap: 14px;
}
.field { display: grid; gap: 6px; }
.field label { font-size: 13px; font-weight: 600; color: var(--ink); }
.field input, .field textarea, .field select {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--signal-blue);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--signal-blue) 18%, transparent);
}
.field textarea { min-height: 110px; resize: vertical; }
.field .hint { font-size: 12px; color: var(--ink-soft); }
.field .error { font-size: 12.5px; color: #B0314A; display: none; }
.field.invalid .error { display: block; }
.field.invalid input, .field.invalid textarea { border-color: #B0314A; }
.consent { display: flex; gap: 10px; align-items: flex-start; font-size: 13px; color: var(--ink-soft); }
.consent input { margin-top: 3px; }
.form-actions { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.form-note { font-size: 12.5px; color: var(--ink-soft); }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg);
  color: var(--ink-soft);
  font-size: 14px;
}
.site-footer .container {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap;
  padding-block: 28px;
  gap: 16px;
}
.site-footer a { color: var(--ink-soft); }
.site-footer a:hover { color: var(--signal-blue); }
.foot-links { display: flex; gap: 18px; }

/* ---------- Misc ---------- */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
::selection { background: color-mix(in srgb, var(--cyan) 45%, transparent); color: var(--navy); }