/* ========================================================================
   Nextekk - base.css
   Full design tokens from BRANDING.md baked into :root.
   This file owns: tokens, reset, typography, container, header, nav,
   footer, button, card, form, utility classes. Page-specific styles
   layer on top via per-page <style> blocks or future page CSS files.
   ======================================================================== */

/* --- Self-hosted Inter (latin subset, woff2) --------------------------- */
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url('/assets/fonts/inter/inter-latin-400.woff2') format('woff2');
}
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 500;
    font-display: swap;
    src: url('/assets/fonts/inter/inter-latin-500.woff2') format('woff2');
}
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 600;
    font-display: swap;
    src: url('/assets/fonts/inter/inter-latin-600.woff2') format('woff2');
}
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url('/assets/fonts/inter/inter-latin-700.woff2') format('woff2');
}
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 800;
    font-display: swap;
    src: url('/assets/fonts/inter/inter-latin-800.woff2') format('woff2');
}

/* --- Self-hosted JetBrains Mono (variable font, latin subset) ---------- */
@font-face {
    font-family: 'JetBrains Mono';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url('/assets/fonts/jetbrains-mono/jetbrains-mono-latin.woff2') format('woff2');
}
@font-face {
    font-family: 'JetBrains Mono';
    font-style: normal;
    font-weight: 500;
    font-display: swap;
    src: url('/assets/fonts/jetbrains-mono/jetbrains-mono-latin.woff2') format('woff2');
}

:root {
  /* Brand - sampled from delivered logo */
  --color-brand:        #0E1A3D;
  --color-brand-2:      #16234E;
  --color-brand-soft:   #E8ECF6;

  /* Accents */
  --color-accent:       #2553EB;
  --color-accent-2:     #1B40C4;
  --color-accent-soft:  #E5EBFE;
  --color-spark:        #06B6D4;
  --color-spark-soft:   #CFFAFE;

  /* Neutrals */
  --color-ink:          #0F172A;
  --color-ink-soft:     #334155;
  --color-muted:        #64748B;
  --color-line:         #E2E8F0;
  --color-surface:      #FFFFFF;
  --color-surface-alt:  #F8FAFC;
  --color-surface-2:    #F1F5F9;

  /* Dark sections */
  --color-dark:         #0E1A3D;
  --color-dark-2:       #16234E;
  --color-dark-3:       #1F2E66;
  --color-on-dark:      #FFFFFF;
  --color-on-dark-mut:  rgba(255, 255, 255, 0.65);

  /* Status */
  --color-success:      #10B981;
  --color-warning:      #F59E0B;
  --color-danger:       #DC2626;

  /* Type */
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Shadow */
  --shadow-1: 0 1px 2px rgba(15, 23, 42, 0.04), 0 4px 12px rgba(15, 23, 42, 0.04);
  --shadow-2: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-3: 0 16px 40px rgba(15, 23, 42, 0.12);

  /* Layout */
  --container-max: 1200px;
  --container-pad: 24px;
  --header-h: 80px;
  --header-h-mobile: 60px;
  --topbar-h: 36px;
}

/* --- Reset & base ------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

button { font: inherit; cursor: pointer; }

a { color: var(--color-accent); text-decoration: none; }
a:hover, a:focus-visible { color: var(--color-accent-2); text-decoration: underline; text-underline-offset: 3px; }

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

/* --- Typography --------------------------------------------------------- */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  color: var(--color-ink);
  margin: 0 0 0.6em;
  letter-spacing: -0.01em;
}
h1 { font-size: 44px; font-weight: 700; line-height: 1.15; letter-spacing: -0.02em; }
h2 { font-size: 32px; font-weight: 700; line-height: 1.2;  letter-spacing: -0.015em; }
h3 { font-size: 22px; font-weight: 700; line-height: 1.3; }
h4 { font-size: 18px; font-weight: 600; line-height: 1.35; }

p { margin: 0 0 1em; max-width: 68ch; }

.lead { font-size: 20px; line-height: 1.5; color: var(--color-ink-soft); max-width: none; text-wrap: balance; }
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 12px;
}
.eyebrow--on-dark { color: var(--color-spark); }
.muted { color: var(--color-muted); }
small, .small { font-size: 14px; }

code, pre, .mono { font-family: var(--font-mono); font-size: 0.95em; }
code { background: var(--color-surface-2); padding: 2px 6px; border-radius: var(--radius-sm); }

/* --- Layout primitives -------------------------------------------------- */

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

.section { padding-block: 80px; }
.section--alt { background: var(--color-surface-alt); }
.section--dark { background: var(--color-dark); color: var(--color-on-dark); }
.section--dark h1, .section--dark h2, .section--dark h3, .section--dark h4 { color: var(--color-on-dark); }
.section--dark .lead, .section--dark .muted { color: var(--color-on-dark-mut); }

.skip-link {
  position: absolute;
  inset-inline-start: -9999px;
  top: 0;
  background: var(--color-brand);
  color: var(--color-on-dark);
  padding: 12px 16px;
  border-radius: 0 0 var(--radius-md) 0;
  z-index: 1000;
}
.skip-link:focus { inset-inline-start: 0; }

/* --- Buttons ------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color .15s ease, color .15s ease, border-color .15s ease, transform .05s ease;
  text-decoration: none;
}
.btn:active { transform: translateY(1px); }
.btn:hover, .btn:focus-visible { text-decoration: none; }

.btn-primary {
  background: var(--color-brand);
  color: var(--color-on-dark);
  border-color: var(--color-brand);
}
.btn-primary:hover, .btn-primary:focus-visible { background: var(--color-brand-2); border-color: var(--color-brand-2); color: var(--color-on-dark); }

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn-secondary:hover, .btn-secondary:focus-visible { background: var(--color-accent); color: var(--color-on-dark); }

.btn-ghost {
  background: transparent;
  color: var(--color-accent);
}
.btn-ghost:hover, .btn-ghost:focus-visible { color: var(--color-accent-2); text-decoration: underline; text-underline-offset: 3px; }

.btn--on-dark.btn-primary { background: var(--color-on-dark); color: var(--color-brand); border-color: var(--color-on-dark); }
.btn--on-dark.btn-primary:hover { background: var(--color-brand-soft); color: var(--color-brand); }
.btn--on-dark.btn-ghost { background: transparent; color: var(--color-on-dark); border-color: var(--color-on-dark); }
.btn--on-dark.btn-ghost:hover { background: rgba(255,255,255,0.10); color: var(--color-on-dark); }

.cta-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 32px; justify-content: center; }

.footer-logo { height: 38px; width: auto; display: block; filter: brightness(0) invert(1); }
.center p { margin-inline: auto; }

/* --- Topbar (slim contact band above the main header) ----------------- */

.topbar {
  background: var(--color-dark);
  color: var(--color-on-dark-mut);
  font-size: 13px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.topbar-inner {
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.topbar-tagline {
  color: var(--color-spark);
  font-weight: 600;
  letter-spacing: 0.02em;
}
.topbar-contact { display: flex; align-items: center; gap: 12px; }
.topbar-link {
  color: var(--color-on-dark-mut);
  text-decoration: none;
  transition: color .12s ease;
}
.topbar-link:hover, .topbar-link:focus-visible {
  color: var(--color-on-dark);
  text-decoration: none;
}
.topbar-link-label {
  color: var(--color-spark);
  font-weight: 600;
  margin-right: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 11px;
}
.topbar-divider { opacity: 0.3; }

@media (max-width: 768px) {
  .topbar { display: none; }  /* save vertical space on phones; phone + email live in the footer */
}

/* --- Header / Nav ------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--color-line); box-shadow: var(--shadow-1); }

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: var(--header-h);
}

.logo-link { display: inline-flex; align-items: center; flex-shrink: 0; }
.logo-img { height: 38px; width: auto; }

.nav-desktop { display: flex; flex: 1; justify-content: center; }
.nav-list {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: color .15s ease;
}
.nav-link:hover, .nav-link:focus-visible { color: var(--color-ink); text-decoration: none; }
.nav-link.is-active { color: var(--color-ink); }
.nav-link.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}
.nav-cta { flex-shrink: 0; }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  display: none;
  border-top: 1px solid var(--color-line);
  background: var(--color-surface);
}
.nav-mobile-list { list-style: none; margin: 0; padding: 8px 0; }
.nav-mobile-link {
  display: block;
  padding: 14px var(--container-pad);
  font-size: 17px;
  font-weight: 500;
  color: var(--color-ink);
  text-decoration: none;
  border-left: 3px solid transparent;
}
.nav-mobile-link:hover, .nav-mobile-link.is-active { background: var(--color-surface-alt); border-left-color: var(--color-accent); text-decoration: none; }
.nav-mobile-cta { color: var(--color-accent); font-weight: 600; }

@media (max-width: 960px) {
  .header-inner { height: var(--header-h-mobile); }
  .logo-img { height: 30px; }
  .nav-desktop, .nav-cta { display: none; }
  .nav-toggle { display: inline-flex; margin-left: auto; }
  .nav-mobile[aria-hidden="false"], .nav-mobile:not([hidden]) { display: block; }
}

/* --- Cards -------------------------------------------------------------- */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-1);
  transition: box-shadow .2s ease, border-color .2s ease, transform .15s ease;
}
.card:hover { box-shadow: var(--shadow-2); }

/* --- Pills / chips ------------------------------------------------------ */

.chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.2;
  border-radius: 12px;
  letter-spacing: 0.01em;
}
.chip--industry { background: var(--color-brand-soft); color: var(--color-brand); }
.chip--service  { background: var(--color-accent-soft); color: var(--color-accent-2); }
.chip--tech     { background: var(--color-surface-2); color: var(--color-ink-soft); font-family: var(--font-mono); font-weight: 500; }
.chip--ai       { background: var(--color-spark-soft); color: var(--color-spark); }

/* --- Forms -------------------------------------------------------------- */

label { display: block; margin-bottom: 6px; font-size: 14px; font-weight: 500; color: var(--color-ink-soft); }
input[type="text"], input[type="email"], input[type="tel"], input[type="url"], input[type="search"], textarea, select {
  display: block;
  width: 100%;
  padding: 12px;
  font: inherit;
  color: var(--color-ink);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  transition: border-color .15s ease, box-shadow .15s ease;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37, 83, 235, 0.2);
}
.form-error { color: var(--color-danger); font-size: 14px; margin-top: 4px; }

/* --- Hero --------------------------------------------------------------- */

.hero {
  position: relative;
  background: var(--color-dark);
  background-size: cover;
  background-position: center 40%;
  background-repeat: no-repeat;
  color: var(--color-on-dark);
  padding-block: 96px 80px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(14,26,61,0.78);
  z-index: 0;
}
.hero .container { position: relative; z-index: 1; }
.hero h1 { color: var(--color-on-dark); font-size: clamp(36px, 5vw + 1rem, 64px); font-weight: 800; line-height: 1.05; max-width: 18ch; }
.hero .lead { color: var(--color-on-dark-mut); max-width: 56ch; font-size: clamp(17px, 1vw + 1rem, 22px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }

/* --- Footer ------------------------------------------------------------- */

.site-footer {
  background: var(--color-dark);
  color: var(--color-on-dark);
  padding-block: 56px 32px;
  margin-top: 96px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 48px;
  align-items: start;
}
.footer-brand { display: flex; flex-direction: column; gap: 16px; }
.footer-tagline { color: var(--color-spark); font-weight: 600; max-width: 32ch; margin: 0; }

.footer-nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.footer-col-title { color: var(--color-on-dark); font-size: 14px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; margin: 0 0 16px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.footer-col a { color: var(--color-on-dark-mut); text-decoration: none; font-size: 17px; }
.footer-col a:hover, .footer-col a:focus-visible { color: var(--color-on-dark); text-decoration: underline; text-underline-offset: 3px; }

.footer-bottom {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  color: var(--color-on-dark-mut);
  font-size: 14px;
}
.footer-bottom p { margin: 0; }
.footer-meta a { color: var(--color-on-dark-mut); }
.footer-meta a:hover { color: var(--color-on-dark); }

@media (max-width: 768px) {
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .footer-nav { grid-template-columns: 1fr 1fr; }
  .section { padding-block: 56px; }
  .hero { padding-block: 72px 56px; }
  h1 { font-size: 32px; }
  h2 { font-size: 24px; }
}

/* --- Utility ------------------------------------------------------------ */

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}
.center { text-align: center; }
.flex { display: flex; }
.grid { display: grid; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }
.gap-4 { gap: 32px; }
.mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; } .mt-4 { margin-top: 32px; } .mt-5 { margin-top: 48px; } .mt-6 { margin-top: 64px; }