/* ==========================================================================
   Nawa Technology — Global styles
   Design tokens, reset, typography, layout utilities, buttons.
   Loaded on every page, before the page-specific stylesheet.
   ========================================================================== */

:root {
  /* Colour */
  --color-navy: #0B1F3A;
  --color-ink: #0B1220;
  --color-blue: #2451D6;
  --color-blue-deep: #143C99;
  --color-blue-bright: #4FA8FF;
  --color-bg: #F6F7FA;
  --color-surface: #FFFFFF;
  --color-border: #E3E7EF;
  --color-border-strong: #D3D9E4;
  --color-grey-600: #5B6472;
  --color-grey-400: #8992A3;
  --color-on-navy: #C9D5EC;
  --color-success: #1E8E5A;

  /* Type */
  --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  /* Spacing scale */
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4.5rem;
  --space-8: 6.5rem;

  /* Layout */
  --container-width: 1200px;
  --container-pad: clamp(1.25rem, 4vw, 2.5rem);

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 160ms;
  --dur: 320ms;

  /* Shadow — kept very subtle, corporate not glossy */
  --shadow-sm: 0 1px 2px rgba(11, 31, 58, 0.06);
  --shadow-md: 0 8px 24px rgba(11, 31, 58, 0.08);
  --shadow-lg: 0 20px 48px rgba(11, 31, 58, 0.12);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body, h1, h2, h3, h4, p, figure, blockquote, dl, dd, ul, ol {
  margin: 0;
}
ul, ol { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }

body {
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---------- Focus states ---------- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-blue-bright);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-navy);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.12;
}

h1 { font-size: clamp(2.4rem, 4.4vw, 3.75rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.8rem, 2.8vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 1.6vw, 1.5rem); }
h4 { font-size: 1.05rem; }

p { color: var(--color-grey-600); }
.lede { font-size: clamp(1.05rem, 1.4vw, 1.2rem); color: var(--color-grey-600); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-blue);
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: var(--space-3);
}
.eyebrow::before {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--color-blue);
  display: inline-block;
}

.mono { font-family: var(--font-mono); }

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

.section {
  padding-block: var(--space-8);
}
.section--tight { padding-block: var(--space-7); }
.section--dark {
  background: var(--color-navy);
  color: var(--color-on-navy);
}
.section--dark h2, .section--dark h3, .section--dark h4 { color: #fff; }
.section--dark p { color: var(--color-on-navy); }
.section--surface { background: var(--color-surface); }

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-6);
}
.section-head--center { margin-inline: auto; text-align: center; }

.grid {
  display: grid;
  gap: var(--space-4);
}
@media (min-width: 720px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 980px) {
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease),
    background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
  white-space: nowrap;
}
.btn--sm { padding: 0.6rem 1.25rem; font-size: 0.88rem; }
.btn--block { width: 100%; }

.btn--primary {
  background: var(--color-blue);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn--primary:hover { background: var(--color-blue-deep); transform: translateY(-1px); box-shadow: var(--shadow-md); }

.btn--ghost {
  background: transparent;
  color: var(--color-navy);
  border-color: var(--color-border-strong);
}
.btn--ghost:hover { border-color: var(--color-blue); color: var(--color-blue); }

.btn--ghost-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.35);
}
.btn--ghost-light:hover { border-color: #fff; background: rgba(255,255,255,0.08); }

.btn--arrow::after {
  content: "→";
  transition: transform var(--dur-fast) var(--ease);
}
.btn--arrow:hover::after { transform: translateX(3px); }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  color: var(--color-blue);
}
.link-arrow::after { content: "→"; transition: transform var(--dur-fast) var(--ease); }
.link-arrow:hover::after { transform: translateX(3px); }

/* ---------- Cards ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}

/* ---------- Media placeholder (used until real photography is supplied) ---------- */
.media-placeholder {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background:
    radial-gradient(circle at 20% 20%, rgba(36,81,214,0.16), transparent 45%),
    repeating-linear-gradient(45deg, rgba(11,31,58,0.05) 0 1px, transparent 1px 14px),
    linear-gradient(160deg, #0F2649 0%, #143C99 100%);
  aspect-ratio: var(--ph-ratio, 4 / 3);
  display: flex;
  align-items: flex-end;
  color: #fff;
}
.media-placeholder__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.9rem 1.1rem;
  background: rgba(11, 18, 32, 0.45);
  backdrop-filter: blur(2px);
  width: 100%;
}

/* ---------- Connector signature (nodes + line linking sections) ---------- */
.connector {
  position: relative;
  width: 1px;
  background: var(--color-border-strong);
  margin-inline: auto;
  height: var(--space-6);
}
.connector::before, .connector::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-blue);
  transform: translateX(-50%);
}
.connector::before { top: -3px; }
.connector::after { bottom: -3px; }

/* ---------- Reveal-on-scroll ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 620ms var(--ease), transform 620ms var(--ease);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-navy);
  color: #fff;
  padding: 0.75rem 1.25rem;
  z-index: 200;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus {
  left: 0;
}

/* ---------- Shared page hero (About / Services / Contact) ---------- */
.page-hero {
  padding-block: var(--space-7) var(--space-6);
  background:
    radial-gradient(900px 420px at 85% -20%, rgba(36,81,214,0.10), transparent 60%),
    var(--color-bg);
}
.page-hero .lede { max-width: 640px; margin-top: var(--space-3); }

/* ---------- Shared bottom CTA band ---------- */
.cta {
  background: linear-gradient(160deg, var(--color-navy), var(--color-blue-deep));
  padding-block: var(--space-7);
}
.cta__inner {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
}
.cta h2 { color: #fff; }
.cta .lede { color: var(--color-on-navy); margin-block: var(--space-3) var(--space-5); }
.cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}
.cta .btn--ghost { color: #fff; border-color: rgba(255,255,255,0.35); }
.cta .btn--ghost:hover { border-color: #fff; background: rgba(255,255,255,0.08); }

/* ---------- Visually hidden ---------- */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}