/* ==========================================================================
   CloudHub Networks — landing page
   Static HTML + CSS. No JavaScript, no web fonts, no third-party assets.

   Design system
   - Type: platform system font (SF Pro on Apple, Segoe/Roboto elsewhere)
   - Scale: 17px body (mobile default), 13px minimum caption
   - Colour: semantic tokens with light + dark variants; all text ≥ 4.5:1
   - Controls: ≥ 44px tall, pill radius, visible keyboard focus
   - Motion: short fade/rise on load; disabled under prefers-reduced-motion
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Tokens
   -------------------------------------------------------------------------- */
:root {
  color-scheme: light dark;

  /* Neutrals (light) */
  --bg:                 #ffffff;
  --bg-secondary:       #f5f5f7;
  --surface:            #f5f5f7;   /* cards */
  --separator:          rgba(0, 0, 0, 0.10);
  --label:              #1d1d1f;   /* 16.1:1 on #fff */
  --label-secondary:    #6e6e73;   /* 5.5:1 on #fff  */
  --label-tertiary:     #86868b;   /* 3.5:1 — large/bold text only */

  /* Sysdojo brand — matches www.sysdojo.com (teal · mint · cyan) */
  --sd-teal:            #2d8aa7;
  --sd-mint:            #40c7b6;
  --sd-cyan:            #0fa6da;
  --sd-action:          #2d8aa7;
  --sd-action-hover:    #267890;
  --sd-link:            #2d8aa7;
  --sd-gradient:        linear-gradient(135deg, var(--sd-teal) 0%, var(--sd-mint) 55%, var(--sd-cyan) 100%);

  /* Audix brand */
  --ax-primary:         #482ac4;
  --ax-accent:          #8930fa;
  --ax-deep:            #030fa6;
  --ax-action:          #482ac4;   /* white on this: 8.75:1 */
  --ax-action-hover:    #3a22a0;
  --ax-link:            #482ac4;   /* 8.75:1 on #fff */
  --ax-gradient:        linear-gradient(135deg, var(--ax-deep) 0%, var(--ax-primary) 50%, var(--ax-accent) 100%);

  /* Neutral action (secondary button) */
  --action-neutral-bg:        rgba(0, 0, 0, 0.06);
  --action-neutral-bg-hover:  rgba(0, 0, 0, 0.10);

  --focus-ring:         #0071e3;

  /* Type */
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display",
               "Inter", "Segoe UI", Roboto, "Helvetica Neue", Helvetica, Arial, sans-serif;

  --fs-caption:   0.8125rem;                                  /* 13px */
  --fs-footnote:  0.875rem;                                   /* 14px */
  --fs-body:      1.0625rem;                                  /* 17px */
  --fs-callout:   clamp(1.125rem, 1.02rem + 0.5vw, 1.3125rem);/* 18–21px */
  --fs-title3:    clamp(1.375rem, 1.2rem + 0.8vw, 1.75rem);   /* 22–28px */
  --fs-large:     clamp(2.125rem, 1.2rem + 4.4vw, 4.5rem);    /* 34–72px */

  /* Spacing (8pt grid) */
  --s-1: 0.25rem;
  --s-2: 0.5rem;
  --s-3: 0.75rem;
  --s-4: 1rem;
  --s-5: 1.5rem;
  --s-6: 2rem;
  --s-7: 3rem;
  --s-8: 4rem;
  --s-9: 6rem;

  --gutter: clamp(1.375rem, 4vw, 2.5rem);
  --container: 61.25rem;   /* 980px */

  --radius-card: 1.75rem;  /* 28px */
  --radius-pill: 980px;

  --shadow-card: 0 2px 6px rgba(0, 0, 0, 0.04), 0 12px 32px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 4px 10px rgba(0, 0, 0, 0.05), 0 20px 48px rgba(0, 0, 0, 0.10);

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 220ms;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:                 #000000;
    --bg-secondary:       #000000;
    --surface:            #1d1d1f;
    --separator:          rgba(255, 255, 255, 0.14);
    --label:              #f5f5f7;   /* 18.6:1 on #000, 14.3:1 on #1d1d1f */
    --label-secondary:    #a1a1a6;   /* 8.4:1 on #000,  6.5:1 on #1d1d1f */
    --label-tertiary:     #86868b;

    --sd-action:          #2d8aa7;
    --sd-action-hover:    #40c7b6;
    --sd-link:            #40c7b6;   /* mint on dark — matches sysdojo.com */

    --ax-action:          #482ac4;
    --ax-action-hover:    #5b3fd8;
    --ax-link:            #a58cff;   /* 7.9:1 on #000, 6.1:1 on #1d1d1f */

    --action-neutral-bg:        rgba(255, 255, 255, 0.10);
    --action-neutral-bg-hover:  rgba(255, 255, 255, 0.16);

    --focus-ring:         #2997ff;

    --shadow-card: 0 0 0 1px rgba(255, 255, 255, 0.06);
    --shadow-card-hover: 0 0 0 1px rgba(255, 255, 255, 0.12);
  }
}

@media (prefers-contrast: more) {
  :root {
    --label-secondary: #3a3a3c;
    --separator: rgba(0, 0, 0, 0.30);
  }
}

@media (prefers-contrast: more) and (prefers-color-scheme: dark) {
  :root {
    --label-secondary: #d1d1d6;
    --separator: rgba(255, 255, 255, 0.35);
  }
}

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

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

body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--label);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.47;
  letter-spacing: -0.012em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern" 1;
}

main {
  flex: 1 0 auto;
}

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

a {
  color: inherit;
  text-decoration: none;
}

p,
h1,
h2,
h3,
ul {
  margin: 0;
}

ul {
  padding: 0;
  list-style: none;
}

strong {
  font-weight: 600;
  color: var(--label);
}

:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  width: min(100% - 2 * var(--gutter), var(--container));
  margin-inline: auto;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--gutter);
  z-index: 100;
  padding: var(--s-3) var(--s-4);
  background: var(--label);
  color: var(--bg);
  font-weight: 600;
  border-radius: var(--radius-pill);
}

.skip-link:focus {
  top: var(--s-3);
}

/* --------------------------------------------------------------------------
   3. Header
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--separator);
  padding-top: env(safe-area-inset-top);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
  min-height: 3.25rem; /* 52px */
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  min-height: 2.75rem; /* 44pt tap target */
  font-weight: 600;
  font-size: var(--fs-body);
  letter-spacing: -0.02em;
}

.brand__mark {
  flex: none;
  width: 28px;
  height: 28px;
  border-radius: 7px;
}

.brand__name {
  white-space: nowrap;
}

.site-nav {
  display: flex;
  gap: var(--s-2);
}

/* Compact header on phones; below 360px the hero CTAs carry the links. */
@media (max-width: 30rem) {
  .brand__name {
    font-size: 0.9375rem; /* 15px */
  }
  .site-nav__link {
    padding: 0 var(--s-3);
  }
}

@media (max-width: 22.5rem) {
  .site-nav {
    display: none;
  }
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  padding: 0 var(--s-4);
  border-radius: var(--radius-pill);
  font-size: var(--fs-footnote);
  font-weight: 500;
  color: var(--label-secondary);
  transition: color var(--dur) var(--ease-out), background-color var(--dur) var(--ease-out);
}

.site-nav__link:hover {
  color: var(--label);
  background: var(--action-neutral-bg);
}

/* --------------------------------------------------------------------------
   4. Hero
   -------------------------------------------------------------------------- */
.hero {
  padding-block: clamp(var(--s-8), 10vw, 8.5rem) clamp(var(--s-7), 6vw, var(--s-9));
  text-align: center;
}

.hero__inner {
  max-width: 50rem;
}

.hero__title {
  font-size: var(--fs-large);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.028em;
  text-wrap: balance;
}

.hero__title-muted {
  color: var(--label-secondary);
}

.hero__lede {
  margin: var(--s-5) auto 0;
  max-width: 38rem;
  font-size: var(--fs-callout);
  line-height: 1.42;
  color: var(--label-secondary);
  text-wrap: pretty;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--s-3);
  margin-top: var(--s-6);
}

.hero__meta {
  margin-top: var(--s-6);
  font-size: var(--fs-footnote);
  color: var(--label-secondary);
}

.text-link {
  color: var(--label);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

/* --------------------------------------------------------------------------
   5. Buttons
   -------------------------------------------------------------------------- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;            /* 48px */
  min-width: 13.5rem;          /* equal pills in the hero pair */
  padding: 0 1.5rem;
  border-radius: var(--radius-pill);
  background: var(--action-neutral-bg);
  color: var(--label);
  font-size: var(--fs-body);
  font-weight: 600;
  letter-spacing: -0.01em;
  white-space: nowrap;
  transition:
    background-color var(--dur) var(--ease-out),
    color var(--dur) var(--ease-out),
    transform var(--dur) var(--ease-out);
}

.button:hover {
  background: var(--action-neutral-bg-hover);
}

.button:active {
  transform: scale(0.98);
}

/* Kept for any legacy markup; both hero CTAs use the equal neutral .button */
.button--primary,
.button--secondary {
  background: var(--action-neutral-bg);
  color: var(--label);
  filter: none;
}

.button--primary:hover,
.button--secondary:hover {
  background: var(--action-neutral-bg-hover);
  filter: none;
}

/* --------------------------------------------------------------------------
   6. Destination cards
   -------------------------------------------------------------------------- */
.destinations {
  padding-block: 0 clamp(var(--s-8), 8vw, var(--s-9));
}

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
}

@media (min-width: 46rem) {  /* 736px */
  .cards {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--s-5);
  }
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  padding: clamp(var(--s-5), 4vw, var(--s-7));
  background: var(--surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow var(--dur) var(--ease-out), transform var(--dur) var(--ease-out);
}

/* Thin brand accent along the top edge — colour is supplementary; each card
   is also identified by its logo and name. */
.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
}

.card--sysdojo::before { background: var(--sd-gradient); }
.card--audix::before   { background: var(--ax-gradient); }

@media (hover: hover) {
  .card:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-2px);
  }
}

.card__logo {
  display: flex;
  align-items: center;
  min-height: 2rem;
  margin-bottom: var(--s-2);
}

.card__logo img {
  height: 28px;
  width: auto;
}

.card--sysdojo .card__logo img {
  height: 36px;
  width: auto;
  max-width: 200px;
}

@media (prefers-color-scheme: dark) {
  /* Brand mark is tuned for dark surfaces (same asset as sysdojo.com). */
  .card--sysdojo .card__logo img {
    filter: brightness(1.12) saturate(1.05);
  }
}

.card__title {
  font-size: var(--fs-title3);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.card__body {
  color: var(--label-secondary);
  text-wrap: pretty;
}

.card__list {
  display: grid;
  gap: var(--s-2);
  color: var(--label);
  font-size: var(--fs-body);
}

.card__list li {
  position: relative;
  padding-left: 1.5rem;
}

.card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--label-tertiary);
}

.card--sysdojo .card__list li::before { background: var(--sd-link); }
.card--audix   .card__list li::before { background: var(--ax-link); }

.card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  margin-top: var(--s-1);
  font-size: var(--fs-footnote);
}

.card__links a {
  color: var(--label-secondary);
  font-weight: 500;
  text-decoration: none;
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
}

.card__links a:hover {
  color: var(--label);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.card--sysdojo .card__links a:hover { color: var(--sd-link); }
.card--audix   .card__links a:hover { color: var(--ax-link); }

.card__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  align-self: flex-start;
  min-height: 2.75rem;         /* 44pt */
  margin-top: auto;
  font-weight: 600;
  transition: gap var(--dur) var(--ease-out);
}

.card--sysdojo .card__cta { color: var(--sd-link); }
.card--audix   .card__cta { color: var(--ax-link); }

.card__cta:hover {
  text-decoration: underline;
  text-underline-offset: 0.2em;
  gap: 0.55em;
}

.card__chevron {
  font-size: 1.25em;
  line-height: 1;
  transform: translateY(-0.04em);
}

/* --------------------------------------------------------------------------
   7. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--separator);
  background: var(--bg-secondary);
  padding-block: var(--s-6) calc(var(--s-6) + env(safe-area-inset-bottom));
  font-size: var(--fs-caption);
  color: var(--label-secondary);
}

.site-footer__inner {
  display: grid;
  gap: var(--s-2);
}

@media (min-width: 46rem) {
  .site-footer__inner {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "copy links"
      "note links";
    align-items: center;
    column-gap: var(--s-6);
  }
  .site-footer__copy  { grid-area: copy; }
  .site-footer__note  { grid-area: note; }
  .site-footer__links { grid-area: links; justify-content: flex-end; }
}

.site-footer__links {
  display: flex;
  gap: var(--s-5);
}

.site-footer__links a {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;         /* 44pt */
  font-weight: 500;
  color: var(--label);
}

.site-footer__links a:hover {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

/* --------------------------------------------------------------------------
   8. Motion
   -------------------------------------------------------------------------- */
.reveal {
  animation: reveal 640ms var(--ease-out) both;
  animation-delay: calc(var(--i, 0) * 70ms);
}

.reveal--0 { --i: 0; }
.reveal--1 { --i: 1; }
.reveal--2 { --i: 2; }
.reveal--3 { --i: 3; }
.reveal--4 { --i: 4; }
.reveal--5 { --i: 5; }

@keyframes reveal {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    animation: none;
  }
  .button,
  .card,
  .card__cta,
  .site-nav__link {
    transition: none;
  }
  .card:hover {
    transform: none;
  }
}

/* --------------------------------------------------------------------------
   9. Print
   -------------------------------------------------------------------------- */
@media print {
  .site-header,
  .site-footer__note {
    display: none;
  }
  .card {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }
  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #555;
  }
}