/* ============================================================
   Wiretap — doc.wiretap.ch
   assets/css/style.css
   ------------------------------------------------------------
   Single stylesheet for the whole site.
   No framework, no external fonts, no JavaScript required.
   Layout language inspired by classic open-source project
   sites; identity: Wiretap blue/grey on a warm off-white.
   ============================================================ */

/* ------------------------------------------------------------
   1. Design tokens
   ------------------------------------------------------------ */
:root {
  /* Backgrounds */
  --bg:            #f4f4f0;   /* page: warm off-white */
  --bg-panel:      #fbfbf8;   /* alternate sections, header */
  --bg-card:       #ffffff;   /* cards / panels */
  --bg-code:       #eeeee8;   /* address blocks */

  /* Text */
  --text:          #202020;
  --text-soft:     #5c5c5c;
  --heading:       #262626;

  /* Borders */
  --border:        #e2e2da;
  --border-strong: #d4d4ca;

  /* Wiretap blues */
  --blue:          #315f86;
  --blue-dark:     #244963;
  --blue-pale:     #8ec9f4;   /* light accent on dark backgrounds */
  --link:          #2c6396;
  --link-hover:    #244963;

  /* Footer */
  --footer-bg:     #1f1f1f;
  --footer-line:   #333333;
  --footer-text:   #b5b5b0;
  --footer-link:   #d8d8d3;
  --footer-dim:    #8f8f8a;

  /* Type */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas,
               "Liberation Mono", "DejaVu Sans Mono", monospace;
}

/* ------------------------------------------------------------
   2. Base / reset
   ------------------------------------------------------------ */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

main { display: block; }

img {
  max-width: 100%;
  height: auto;
}

p { margin: 0 0 1rem; }

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

::selection {
  background: var(--blue);
  color: #ffffff;
}

a { color: var(--link); }
a:hover { color: var(--link-hover); }

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

section[id] { scroll-margin-top: 1rem; }

/* ------------------------------------------------------------
   3. Layout
   ------------------------------------------------------------ */
.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section { padding: 3.5rem 0; }

.section-alt {
  background: var(--bg-panel);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* Keep prose lines readable */
.section p { max-width: 70ch; }

/* ------------------------------------------------------------
   4. Headings
   ------------------------------------------------------------ */
h2 {
  margin: 0 0 1.5rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border-strong);
  font-size: 1.7rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--heading);
}

h3 {
  margin: 0 0 0.6rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--heading);
}

/* ------------------------------------------------------------
   5. Skip link (keyboard users)
   ------------------------------------------------------------ */
.skip-link {
  position: absolute;
  left: -9999px;
  background: var(--blue-dark);
  color: #ffffff;
  padding: 0.5rem 1rem;
  border-radius: 3px;
  text-decoration: none;
}

.skip-link:hover { color: #ffffff; }

.skip-link:focus {
  left: 0.75rem;
  top: 0.75rem;
  z-index: 100;
}

/* ------------------------------------------------------------
   6. Header / navigation
   ------------------------------------------------------------ */
.site-header {
  background: var(--bg-panel);
  border-top: 3px solid var(--blue);
  border-bottom: 1px solid var(--border-strong);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
  padding-top: 0.7rem;
  padding-bottom: 0.7rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
}

.brand-name {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.brand:hover .brand-name { color: var(--blue); }

/* Used if the text wordmark is replaced by an image logo */
.brand-logo {
  display: block;
  height: 30px;
  width: auto;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  display: inline-block;
  padding: 0.4rem 0.7rem;
  border-radius: 2px;
  font-size: 0.95rem;
  font-weight: 500;
  color: #3a3a3a;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--blue-dark);
  background: #eeeee8;
}

/* "Forum" — the accent tab of the navigation */
.site-nav a.nav-forum {
  margin-left: 0.35rem;
  padding: 0.4rem 0.95rem;
  border-radius: 3px;
  background: var(--blue);
  color: #ffffff;
  font-weight: 600;
}

.site-nav a.nav-forum:hover { background: var(--blue-dark); }

/* ------------------------------------------------------------
   7. Hero
   ------------------------------------------------------------ */
.hero {
  padding: 3.75rem 0 4.25rem;
  color: #ffffff;
  background-color: var(--blue);
  background-image:
    repeating-linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.03) 0px,
      rgba(255, 255, 255, 0.03) 2px,
      transparent 2px,
      transparent 14px
    ),
    linear-gradient(180deg, var(--blue) 0%, var(--blue-dark) 100%);
}

.hero h1 {
  margin: 0 0 0.4rem;
  font-family: var(--font-mono);
  font-size: clamp(2.3rem, 5vw, 3.1rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.hero-tagline {
  margin: 0 0 1.1rem;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--blue-pale);
}

.hero-text {
  margin: 0 0 1.9rem;
  max-width: 640px;
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.92);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.hero :focus-visible { outline-color: #ffffff; }

/* ------------------------------------------------------------
   8. Buttons
   ------------------------------------------------------------ */
.btn {
  display: inline-block;
  padding: 0.6rem 1.3rem;
  border: 1px solid transparent;
  border-radius: 3px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease,
              border-color 0.15s ease;
}

/* On the blue hero */
.btn-light {
  background: #ffffff;
  color: var(--blue-dark);
}
.btn-light:hover {
  background: #e6eef5;
  color: var(--blue-dark);
}

.btn-ghost {
  border-color: rgba(255, 255, 255, 0.65);
  color: #ffffff;
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

/* On light backgrounds */
.btn-primary {
  background: var(--blue);
  color: #ffffff;
}
.btn-primary:hover {
  background: var(--blue-dark);
  color: #ffffff;
}

.btn-outline {
  border-color: var(--blue);
  color: var(--blue);
}
.btn-outline:hover {
  background: var(--blue);
  color: #ffffff;
}

/* ------------------------------------------------------------
   9. "Why Wiretap?" — feature grid
   ------------------------------------------------------------ */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature {
  border-top: 3px solid var(--blue);
  padding-top: 1rem;
}

.feature h3 { color: var(--blue-dark); }

.feature p { margin: 0; }

/* ------------------------------------------------------------
   10. "Who is it for?" — two columns + lists
   ------------------------------------------------------------ */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.tick-list,
.privacy-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.tick-list li,
.privacy-list li {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: 0.45rem;
}

.tick-list li::before,
.privacy-list li::before {
  content: "»";
  position: absolute;
  left: 0;
  color: var(--blue);
  font-weight: 700;
}

.privacy-list li {
  margin-bottom: 0.8rem;
  max-width: 70ch;
}

/* ------------------------------------------------------------
   11. Access Wiretap
   ------------------------------------------------------------ */
.access-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

.access-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-top: 3px solid var(--blue);
  border-radius: 3px;
}

.access-card p { margin-bottom: 0.75rem; }

.access-card .address {
  width: 100%;
  margin: 0.25rem 0 1.1rem;
}

.address code {
  display: block;
  padding: 0.55rem 0.75rem;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 3px;
  font-size: 0.85rem;
  color: #303030;
  overflow-wrap: anywhere;
  word-break: break-all;
}

.access-card .btn { margin-top: auto; }

/* Mini Tor guide */
.tor-guide {
  margin-top: 2rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-left: 3px solid var(--blue);
  border-radius: 3px;
  max-width: 560px;
}

.tor-guide h3 { margin-bottom: 0.5rem; }

.tor-guide ol {
  margin: 0;
  padding-left: 1.3rem;
}

.tor-guide li { margin-bottom: 0.3rem; }
.tor-guide li:last-child { margin-bottom: 0; }

/* ------------------------------------------------------------
   12. Privacy by design
   ------------------------------------------------------------ */
.note {
  margin-top: 1.75rem;
  padding-left: 1rem;
  border-left: 3px solid var(--border-strong);
  color: var(--text-soft);
  font-size: 0.95rem;
}

/* ------------------------------------------------------------
   13. Project updates — changelog
   ------------------------------------------------------------ */
.changelog {
  margin: 0;
  padding: 0;
  list-style: none;
  max-width: 760px;
}

.changelog li {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  padding: 0.6rem 0.25rem;
  border-bottom: 1px solid var(--border);
}

.changelog li:first-child { border-top: 1px solid var(--border); }

.log-date {
  flex: 0 0 5.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--blue-dark);
}

.log-text { flex: 1; }

/* ------------------------------------------------------------
   14. Behind Wiretap
   ------------------------------------------------------------ */
.creator {
  max-width: 420px;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-top: 3px solid var(--blue);
  border-radius: 3px;
}

.creator-name {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
}

.creator-role {
  margin: 0 0 1.2rem;
  color: var(--text-soft);
  line-height: 1.5;
}

/* ------------------------------------------------------------
   15. Sponsors — static band, no animation
   ------------------------------------------------------------ */
.sponsors {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2rem 3rem;
}

.sponsor {
  display: inline-flex;
  align-items: center;
}

.sponsor img {
  display: block;
  max-height: 44px;
  width: auto;
  opacity: 0.8;
  transition: opacity 0.15s ease;
}

.sponsor:hover img,
.sponsor:focus-visible img { opacity: 1; }

/* ------------------------------------------------------------
   16. Footer
   ------------------------------------------------------------ */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem 2rem;
  padding-top: 2.5rem;
  padding-bottom: 2rem;
}

.footer-title {
  margin: 0 0 0.3rem;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
}

.footer-tagline {
  margin: 0;
  font-size: 0.9rem;
}

.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 1.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-nav a {
  color: var(--footer-link);
  font-size: 0.95rem;
  text-decoration: none;
}

.footer-nav a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.site-footer :focus-visible { outline-color: #ffffff; }

.footer-bottom { border-top: 1px solid var(--footer-line); }

.footer-bottom p {
  margin: 0;
  padding: 1rem 0;
  font-size: 0.8rem;
  color: var(--footer-dim);
}

/* ------------------------------------------------------------
   17. Responsive
   ------------------------------------------------------------ */
@media (max-width: 860px) {
  .section { padding: 2.75rem 0; }

  .hero { padding: 3rem 0 3.25rem; }

  .grid-3 {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
}

@media (max-width: 760px) {
  .grid-2,
  .access-grid { grid-template-columns: 1fr; }

  .changelog li { gap: 1rem; }
}

@media (max-width: 560px) {
  .header-inner { justify-content: flex-start; }

  .site-nav a {
    padding: 0.35rem 0.55rem;
    font-size: 0.9rem;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }
}

/* ------------------------------------------------------------
   18. Reduced motion
   ------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}