/* ==========================================================
   KB SafeEdge website — styles
   All colours are tokens in :root. Light theme first, then the
   same tokens redefined for visitors whose system is set to dark.
   ========================================================== */

/* ---------- Self-hosted fonts (SIL OFL, see assets/fonts/) ---------- */
@font-face {
  font-family: "Archivo";
  font-style: normal;
  font-weight: 500 800;
  font-display: swap;
  src: url("fonts/archivo-latin-var.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-latin-var.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-latin-500.woff2") format("woff2");
}

:root {
  color-scheme: light dark;

  /* Brand */
  --accent: #F2B33D;          /* safety amber: buttons, highlights on dark */
  --accent-strong: #C98A12;   /* amber that holds up on light backgrounds */

  /* Page (changes with the theme) */
  --bg: #F4F3EF;
  --bg-tint: #E9E7E0;
  --surface: #FFFFFF;
  --surface-2: #F9F8F5;
  --text: #12161C;
  --text-soft: #3A4250;
  --text-muted: #4A5260;
  --text-code: #2A303A;
  --accent-text: #8A5A00;     /* amber text on the page background (AA) */
  --tag-text: #6A5000;
  --line: #DCDAD3;
  --line-strong: #8C897F;
  --btn-solid-bg: #12161C;
  --btn-solid-text: #F4F3EF;
  --btn-solid-hover: #2A303A;

  /* Dark bands: header, hero, About, footer, dark card */
  --ink: #12161C;
  --ink-2: #1C222B;
  --ink-3: #2E3541;
  --on-ink: #F4F3EF;
  --on-ink-muted: #C3C8CF;
  --on-ink-soft: #AEB4BD;
  --on-ink-faint: #9AA1AB;
  --on-ink-line: #5A6270;

  /* Type */
  --font-display: "Archivo", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --radius: 6px;
  --max: 1240px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15191F;
    --bg-tint: #1A1F27;
    --surface: #1F252E;
    --surface-2: #232A34;
    --text: #ECEBE6;
    --text-soft: #D0D4DA;
    --text-muted: #B4BAC3;
    --text-code: #D5D8DD;
    --accent-text: #F2B33D;
    --tag-text: #EDBB55;
    --line: #2E3541;
    --line-strong: #6A7280;
    --btn-solid-bg: #ECEBE6;
    --btn-solid-text: #12161C;
    --btn-solid-hover: #FFFFFF;

    /* Dark bands go a step darker so they still read as bands */
    --ink: #0B0E12;
  }
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}
img { max-width: 100%; display: block; }
a { color: var(--text); }
a:hover { color: var(--text-soft); }
h1, h2, h3 { font-family: var(--font-display); margin: 0; letter-spacing: -0.02em; }
p { margin: 0; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.muted { color: var(--text-muted); }

.skip-link {
  position: absolute; left: -9999px; top: 8px;
  background: var(--accent); color: #12161C; padding: 8px 14px; z-index: 10;
  font-weight: 600;
}
.skip-link:focus { left: 8px; }

/* Visible keyboard focus: amber ring with a dark halo so it shows on any background */
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  box-shadow: 0 0 0 6px #12161C;
  border-radius: 2px;
}

/* ---------- Dark bands ---------- */
.dark { background: var(--ink); color: var(--on-ink); }
.dark .muted { color: var(--on-ink-muted); }
.dark a { color: var(--on-ink); }

/* ---------- Eyebrow labels ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-text);
}
.eyebrow-accent { color: var(--accent); }
.eyebrow-muted { color: var(--on-ink-faint); font-size: 12px; margin-bottom: 12px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 52px; padding: 0 28px;
  border-radius: 4px; border: 0;
  font: inherit; font-weight: 600; text-decoration: none; cursor: pointer;
  text-align: center;
}
@media (prefers-reduced-motion: no-preference) {
  .btn { transition: filter .15s ease, background .15s ease; }
}
.btn-sm { min-height: 44px; padding: 0 20px; }
.btn-accent, .dark .btn-accent { background: var(--accent); color: #12161C; }
.btn-accent:hover, .dark .btn-accent:hover { color: #12161C; filter: brightness(1.06); }
.btn-outline, .dark .btn-outline { border: 1.5px solid var(--on-ink-line); color: var(--on-ink); font-weight: 500; }
.btn-outline:hover, .dark .btn-outline:hover { color: var(--on-ink); background: var(--ink-2); }
.btn-solid { background: var(--btn-solid-bg); color: var(--btn-solid-text); padding: 0 32px; }
.btn-solid:hover { background: var(--btn-solid-hover); color: var(--btn-solid-text); }
.btn-ghost { background: transparent; color: var(--text); border: 1.5px solid var(--line-strong); }
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }

/* ---------- Header ---------- */
.site-header { background: var(--ink); color: var(--on-ink); }
.header-inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 16px; padding-top: 20px; padding-bottom: 20px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  color: var(--on-ink); text-decoration: none;
  font-family: var(--font-display); font-weight: 800; font-size: 21px; letter-spacing: -0.01em;
}
.brand:hover { color: var(--on-ink); }
.main-nav { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 28px; font-size: 15px; }
.main-nav a:not(.btn) { color: #D5D8DD; text-decoration: none; }
.main-nav a:not(.btn):hover { color: #FFFFFF; }

.nav-toggle {
  display: none;
  align-items: center; gap: 10px;
  min-height: 44px; padding: 0 14px;
  background: transparent; color: var(--on-ink);
  border: 1.5px solid var(--on-ink-line); border-radius: 4px;
  font: inherit; font-size: 15px; font-weight: 600; cursor: pointer;
}
.nav-toggle-bars, .nav-toggle-bars::before, .nav-toggle-bars::after {
  display: block; width: 18px; height: 2px; background: currentColor; position: relative;
}
.nav-toggle-bars::before, .nav-toggle-bars::after { content: ""; position: absolute; left: 0; }
.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { top: 0; transform: rotate(-45deg); }

@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; }
  .main-nav {
    display: none;
    flex-basis: 100%;
    flex-direction: column; align-items: stretch; gap: 0;
    border-top: 1px solid var(--ink-3);
    padding-top: 8px;
    font-size: 17px;
  }
  .main-nav.is-open { display: flex; }
  .main-nav a:not(.btn) { padding: 12px 0; border-bottom: 1px solid var(--ink-3); }
  .main-nav .btn { margin-top: 16px; }
}

/* ---------- Hero ---------- */
.hero { padding: 72px 0 96px; }
.hero-inner { display: flex; flex-wrap: wrap; gap: 56px; align-items: center; }
.hero-copy { flex: 999 1 560px; min-width: 0; display: flex; flex-direction: column; gap: 28px; }
.hero h1 { font-weight: 800; font-size: clamp(36px, 5.6vw, 76px); line-height: 1.04; letter-spacing: -0.025em; }
.lead { max-width: 620px; font-size: 19px; color: var(--on-ink-muted); }

.steps-card {
  flex: 1 1 320px; min-width: 0;
  background: var(--ink-2); border: 1px solid var(--ink-3); border-radius: var(--radius);
  padding: 28px;
}
.steps { list-style: none; margin: 0; padding: 0; }
.steps li { display: flex; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--ink-3); }
.steps li:last-child { border-bottom: 0; }
.step-no { font-family: var(--font-mono); color: var(--accent); font-size: 15px; }
.steps p { font-size: 15px; color: var(--on-ink-soft); }

/* ---------- Standards strip ---------- */
.standards { border-bottom: 1px solid var(--line); padding: 28px 0; }
.standards-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 36px; }
.standards-inner > p { font-size: 14px; color: var(--text-muted); }
.standards ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: 10px 28px;
  font-family: var(--font-mono); font-size: 15px; font-weight: 500; color: var(--text-code);
}

/* ---------- Sections ---------- */
.section { padding: 104px 0; }
.section-tint { background: var(--bg-tint); }
.section h2 { font-weight: 800; font-size: clamp(30px, 3.6vw, 48px); line-height: 1.08; }
.section-head { display: flex; flex-direction: column; gap: 14px; margin-bottom: 48px; }
.section-head.narrow { max-width: 720px; }
.section-head.split { flex-direction: row; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 24px; }
.section-head.split > div { max-width: 640px; display: flex; flex-direction: column; gap: 14px; }
.section-head.split > p { max-width: 440px; }

/* ---------- Service cards ---------- */
.cards-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr)); gap: 24px; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 36px; display: flex; flex-direction: column; gap: 18px;
}
.card h3 { font-weight: 700; font-size: 24px; line-height: 1.2; letter-spacing: -0.01em; }
.card ul { margin: 0; padding-left: 20px; display: flex; flex-direction: column; gap: 6px; font-size: 16px; }
.card-dark { background: var(--ink); color: var(--on-ink); border-color: var(--ink-3); }
.card-dark .muted { color: var(--on-ink-muted); }

.cert-note {
  margin-top: 32px; padding: 18px 22px;
  border-left: 3px solid var(--accent-strong);
  background: var(--surface-2);
  font-size: 16px; color: var(--text-soft); max-width: 860px;
}

/* ---------- Platform ---------- */
.platform-inner { display: flex; flex-wrap: wrap; gap: 64px; align-items: flex-start; }
.platform-copy { flex: 1 1 340px; min-width: 0; display: flex; flex-direction: column; gap: 18px; }
.platform-copy > p:not(.eyebrow) { color: var(--text-soft); }
.modules { flex: 999 1 560px; min-width: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr)); gap: 16px; }
.module { background: var(--surface-2); border-radius: var(--radius); padding: 24px; display: flex; flex-direction: column; gap: 6px; }
.module .tag { font-family: var(--font-mono); font-size: 13px; text-transform: uppercase; color: var(--tag-text); }
.module h3 { font-family: var(--font-body); font-weight: 600; font-size: 18px; letter-spacing: 0; }
.module p:last-child { font-size: 15px; color: var(--text-muted); }

/* ---------- Approach ---------- */
.principles { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr)); border-top: 2px solid var(--text); }
.principles > div { padding: 28px 28px 0 0; display: flex; flex-direction: column; gap: 10px; }
.principles h3 { font-weight: 700; font-size: 20px; letter-spacing: -0.01em; }
.principles p { font-size: 16px; }

/* ---------- About ---------- */
.about-inner { display: flex; flex-wrap: wrap; gap: 56px; align-items: center; }
.about-copy { flex: 999 1 520px; min-width: 0; display: flex; flex-direction: column; gap: 20px; }
.about-copy h2 { font-size: clamp(28px, 3.2vw, 42px); line-height: 1.1; }
.about-copy > p:not(.eyebrow) { color: var(--on-ink-muted); }
.chips { list-style: none; margin: 0; padding: 8px 0 0; display: flex; flex-wrap: wrap; gap: 10px; }
.chips li { padding: 8px 14px; border: 1px solid #3A4250; border-radius: 4px; font-size: 14px; }

/* ---------- Contact ---------- */
.contact-inner { display: flex; flex-wrap: wrap; gap: 64px; }
.contact-copy { flex: 1 1 340px; min-width: 0; display: flex; flex-direction: column; gap: 18px; }
.contact-list { list-style: none; margin: 0; padding: 8px 0 0; display: flex; flex-direction: column; gap: 10px; font-size: 16px; color: var(--text-soft); }

.email-card {
  flex: 999 1 520px; min-width: 0;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 36px;
  display: flex; flex-direction: column; gap: 20px;
}
.email-label { font-size: 14px; font-weight: 600; color: var(--text-muted); }
.email-address {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(22px, 3vw, 32px); letter-spacing: -0.01em; line-height: 1.2;
  user-select: all; -webkit-user-select: all;
  overflow-wrap: anywhere;
}
.copy-status { min-height: 1.6em; font-size: 15px; color: var(--text-muted); }
.include h3 { font-family: var(--font-body); font-size: 16px; font-weight: 600; letter-spacing: 0; margin-bottom: 8px; }
.include ul { margin: 0; padding-left: 20px; display: flex; flex-direction: column; gap: 4px; font-size: 16px; color: var(--text-soft); }
.small-print { font-size: 14px; color: var(--text-muted); }

/* ---------- Simple pages (privacy, 404) ---------- */
.page { padding: 72px 0 104px; }
.page .container { max-width: 760px; }
.page h1 { font-weight: 800; font-size: clamp(32px, 4.4vw, 52px); line-height: 1.08; margin: 12px 0 24px; }
.page h2 { font-size: 22px; font-weight: 700; margin: 40px 0 12px; letter-spacing: -0.01em; }
.page p + p, .page p + ul, .page ul + p { margin-top: 14px; }
.page ul { padding-left: 22px; display: flex; flex-direction: column; gap: 6px; margin: 0; }
.page .muted { font-size: 15px; }
.page-actions { margin-top: 28px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: var(--on-ink-soft); padding: 40px 0; font-size: 14px; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; }
.footer-inner p { margin: 0; }
.site-footer a { color: var(--on-ink); }
.site-footer a:hover { color: #FFFFFF; }

/* ---------- Small screens ---------- */
@media (max-width: 640px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .hero { padding: 48px 0 64px; }
  .section { padding: 72px 0; }
  .card, .email-card { padding: 24px; }
  .steps-card { padding: 20px; }
  .principles > div { padding-right: 0; }
  .btn-row .btn { flex: 1 1 auto; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}