/* ==========================================================================
   SumbarTekno — styles.css
   Design tokens, layout primitives, and section styles.
   ========================================================================== */

:root {
  --bg: #fafbfc;
  --surface: #ffffff;
  --surface-alt: #f1f4f8;
  --ink: #101828;
  --ink-soft: #475467;
  --ink-faint: #98a2b3;
  --accent: #0b5fd0;
  --accent-dark: #084a9f;
  --accent-soft: #e8f0fc;
  --border: #e4e9f0;
  --radius: 14px;
  --shadow-sm: 0 1px 3px rgba(16, 24, 40, 0.07);
  --shadow-md: 0 10px 30px rgba(16, 24, 40, 0.08);
  --font-display: "Sora", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: min(1120px, 100% - 3rem);
  margin-inline: auto;
}

/* --------------------------------------------------------------------------
   Typography & shared primitives
   -------------------------------------------------------------------------- */

h1, h2, h3 { font-family: var(--font-display); line-height: 1.2; }

.section { padding: 5.5rem 0; }
.section--alt { background: var(--surface-alt); }

.section__head { max-width: 640px; margin-bottom: 3rem; }

.section__title {
  font-size: clamp(1.6rem, 3.2vw, 2.25rem);
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}

.section__sub { color: var(--ink-soft); margin: 0; font-size: 1.05rem; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.6rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background-color 0.2s ease, color 0.2s ease,
    border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn--primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
}

.btn--ghost {
  border-color: var(--border);
  color: var(--ink);
  background: var(--surface);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

.btn--sm { padding: 0.55rem 1.1rem; font-size: 0.875rem; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 6px;
}

/* --------------------------------------------------------------------------
   Header / nav
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 4.25rem;
}

.nav__brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.nav__brand span { color: var(--accent); }

.nav__menu {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav__menu a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}
.nav__menu a:hover { color: var(--accent); }
.nav__menu li:last-child a { color: #fff; }
.nav__menu li:last-child a:hover { color: #fff; }
.nav__menu li:last-child { margin-left: 0.5rem; }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 0.5rem;
  cursor: pointer;
}
.nav__toggle span {
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.2s ease;
}
.nav__toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

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

.hero {
  padding: 7rem 0 6.5rem;
  text-align: center;
  background:
    radial-gradient(60% 90% at 50% -10%, var(--accent-soft) 0%, transparent 70%),
    var(--bg);
}

.hero__eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1.25rem;
}

.hero__title {
  font-size: clamp(2.2rem, 5.5vw, 3.75rem);
  margin: 0 0 1.25rem;
  letter-spacing: -0.03em;
}

.hero__accent { color: var(--accent); }

.hero__lead {
  max-width: 620px;
  margin: 0 auto 2.25rem;
  font-size: 1.15rem;
  color: var(--ink-soft);
}

.hero__actions {
  display: flex;
  gap: 0.9rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   About
   -------------------------------------------------------------------------- */

.about {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about__text p { color: var(--ink-soft); margin: 0 0 1.1rem; }

.about__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.about__stats li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-sm);
}

.about__stats strong {
  display: block;
  font-family: var(--font-display);
  color: var(--accent);
  margin-bottom: 0.2rem;
}
.about__stats span { color: var(--ink-soft); font-size: 0.95rem; }

/* --------------------------------------------------------------------------
   Cards (news + services)
   -------------------------------------------------------------------------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

#services .card-grid { grid-template-columns: repeat(4, 1fr); }

/* News cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

.card__media {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #0b2c5f, #0b5fd0);
}
.card__media--2 { background: linear-gradient(135deg, #101828, #34456d); }
.card__media--3 { background: linear-gradient(135deg, #084a9f, #4d9bff); }

.card__body { padding: 1.5rem; display: flex; flex-direction: column; flex: 1; }

.card__date {
  font-size: 0.8rem;
  color: var(--ink-faint);
  margin-bottom: 0.5rem;
}

.card__title {
  font-size: 1.1rem;
  margin: 0 0 0.6rem;
}

.card__excerpt {
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin: 0 0 1.25rem;
  flex: 1;
}

.card__link {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
}
.card__link:hover { text-decoration: underline; }

/* Service cards */
.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.feature:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--accent-soft); }

.feature h3 { font-size: 1.05rem; margin: 0 0 0.6rem; }
.feature p { color: var(--ink-soft); font-size: 0.93rem; margin: 0; }

/* --------------------------------------------------------------------------
   Why us
   -------------------------------------------------------------------------- */

.value-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.value-list li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  box-shadow: var(--shadow-sm);
  color: var(--ink-soft);
  font-size: 0.97rem;
}

.value-list strong {
  display: block;
  font-family: var(--font-display);
  color: var(--ink);
  margin-bottom: 0.3rem;
}

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */

.contact { text-align: center; }

.contact__inner { max-width: 680px; }

.contact__lead { color: var(--ink-soft); margin: 0 0 2rem; font-size: 1.05rem; }

.contact__actions {
  display: flex;
  gap: 0.9rem;
  justify-content: center;
  flex-wrap: wrap;
}

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

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 3rem 0;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.nav__brand--footer { font-size: 1.1rem; }

.footer__nav { display: flex; gap: 1.5rem; flex-wrap: wrap; }

.footer__nav a,
.footer__social a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}
.footer__nav a:hover,
.footer__social a:hover { color: var(--accent); }

.footer__social { display: flex; gap: 0.75rem; }

.footer__social a {
  width: 2.25rem;
  height: 2.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  font-weight: 600;
  font-size: 0.75rem;
}

.footer__copy {
  width: 100%;
  text-align: center;
  color: var(--ink-faint);
  font-size: 0.85rem;
  margin: 0.5rem 0 0;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

/* Reveal-on-scroll animation (toggled by js/main.js; skipped under reduced motion) */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal--visible { opacity: 1; transform: none; }

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 960px) {
  .card-grid,
  #services .card-grid { grid-template-columns: repeat(2, 1fr); }
  .about { grid-template-columns: 1fr; gap: 2.5rem; }
}

@media (max-width: 720px) {
  .nav__toggle { display: flex; }

  .nav__menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    padding: 0.75rem;
  }
  .nav__menu.open { display: flex; }
  .nav__menu li { padding: 0.5rem; }
  .nav__menu a { display: block; padding: 0.5rem; }
  .nav__menu li:last-child { margin: 0; }
  .nav__menu li:last-child a { text-align: center; }

  .value-list { grid-template-columns: 1fr; }
  .hero { padding: 5rem 0 4.5rem; }
  .section { padding: 4rem 0; }
}

@media (max-width: 560px) {
  .card-grid,
  #services .card-grid { grid-template-columns: 1fr; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}