/* ==========================================================================
   Education Host Cloud — gateway page styles
   Plain CSS, no build step. Colours and scale live in :root variables.
   ========================================================================== */

:root {
  /* Brand colours */
  --navy-900: #0a1524;
  --navy-800: #0d1b2e;
  --navy-700: #14263f;
  --navy-600: #1d3454;

  --blue: #2e7cf6;
  --blue-dark: #1f5fd0;
  --blue-soft: #e8f0fe;

  --orange: #f7941e;
  --orange-dark: #d97a0a;
  --orange-soft: #fef1e0;

  --green: #23b273;
  --green-dark: #178a57;
  --green-soft: #e5f6ee;

  /* Neutrals */
  --ink: #16202e;
  --ink-soft: #45536a;
  --line: #e2e8f2;
  --surface: #ffffff;
  --surface-alt: #f4f7fb;

  /* On-dark text */
  --on-dark: #f4f8ff;
  --on-dark-soft: #b7c5da;

  /* Shape & type */
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --shadow-card: 0 4px 18px rgba(13, 27, 46, 0.08);
  --shadow-card-hover: 0 12px 30px rgba(13, 27, 46, 0.14);
  --font-stack: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --header-height: 68px;
}

/* Base ------------------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-stack);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--surface);
  -webkit-text-size-adjust: 100%;
}

h1, h2, h3 {
  line-height: 1.2;
  margin: 0 0 0.6em;
  font-weight: 700;
  letter-spacing: -0.015em;
}

p {
  margin: 0 0 1em;
}

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

a {
  color: var(--blue-dark);
}

.container {
  width: min(1120px, 100% - 2.5rem);
  margin-inline: auto;
}

.container.narrow {
  max-width: 760px;
}

/* Accessible focus states -------------------------------------------------- */

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

.site-header :focus-visible,
.hero :focus-visible,
.section-contact :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--orange);
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  padding: 0.6rem 1.1rem;
  background: var(--blue-dark);
  color: #fff;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--navy-800);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-block: 0.6rem;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.brand-name {
  color: var(--on-dark);
}

.brand-cloud {
  color: var(--navy-900);
  background: linear-gradient(120deg, var(--blue) 0%, var(--green) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--blue); /* fallback if background-clip unsupported */
}

.primary-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.primary-nav a {
  display: inline-block;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-pill);
  color: var(--on-dark-soft);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.primary-nav a:hover {
  color: var(--on-dark);
  background: rgba(255, 255, 255, 0.08);
}

.primary-nav a.nav-cta {
  color: var(--navy-900);
  background: var(--orange);
}

.primary-nav a.nav-cta:hover {
  background: #ffa63c;
}

/* Mobile nav toggle */

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0.9rem;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-pill);
  color: var(--on-dark);
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
}

.nav-toggle-bars {
  position: relative;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.2s ease, top 0.2s ease;
}

.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);
}

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

.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(720px 340px at 12% -10%, rgba(46, 124, 246, 0.35), transparent 65%),
    radial-gradient(560px 300px at 92% 8%, rgba(247, 148, 30, 0.22), transparent 62%),
    radial-gradient(640px 380px at 55% 118%, rgba(35, 178, 115, 0.20), transparent 60%),
    linear-gradient(165deg, var(--navy-900) 0%, var(--navy-800) 55%, var(--navy-700) 100%);
  color: var(--on-dark);
}

.hero-inner {
  max-width: 820px;
  padding-block: clamp(4rem, 10vw, 7rem);
  text-align: center;
}

.hero-eyebrow {
  display: inline-block;
  margin-bottom: 1.4rem;
  padding: 0.4rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.06);
  color: var(--on-dark-soft);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 3.9rem);
  font-weight: 800;
  margin-bottom: 0.4em;
}

.hero .accent-cloud {
  background: linear-gradient(120deg, var(--blue) 0%, var(--green) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--blue); /* fallback */
}

.hero-sub {
  font-size: clamp(1.15rem, 2.5vw, 1.4rem);
  font-weight: 600;
  color: var(--on-dark);
  margin-bottom: 0.8em;
}

.hero-copy {
  color: var(--on-dark-soft);
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: 2.2rem;
}

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

/* Buttons ------------------------------------------------------------------ */

.btn {
  display: inline-block;
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  text-align: center;
  transition: background-color 0.15s ease, border-color 0.15s ease,
              color 0.15s ease, transform 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--blue);
  color: #fff;
}

.btn-primary:hover {
  background: var(--blue-dark);
}

.btn-orange {
  background: var(--orange);
  color: var(--navy-900);
}

.btn-orange:hover {
  background: #ffa63c;
}

.btn-ghost {
  border: 2px solid rgba(255, 255, 255, 0.35);
  color: var(--on-dark);
  background: transparent;
}

.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.7);
  background: rgba(255, 255, 255, 0.08);
}

.btn-light {
  background: #fff;
  color: var(--navy-800);
}

.btn-light:hover {
  background: var(--blue-soft);
}

.btn-outline-light {
  border: 2px solid rgba(255, 255, 255, 0.55);
  color: #fff;
  background: transparent;
}

.btn-outline-light:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

/* Sections ----------------------------------------------------------------- */

.section {
  padding-block: clamp(3.2rem, 8vw, 5.5rem);
}

.section-eyebrow {
  color: var(--blue-dark);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  margin-bottom: 0.7rem;
}

.section h2 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  color: var(--ink);
}

.section-copy {
  color: var(--ink-soft);
  font-size: 1.1rem;
  margin-bottom: 0;
}

.section-domain {
  background: var(--surface);
}

/* Cards -------------------------------------------------------------------- */

.section-cards {
  background: var(--surface-alt);
}

.card-grid {
  margin-top: 2.4rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(245px, 1fr));
  gap: 1.4rem;
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 4px solid var(--card-accent, var(--blue));
  border-radius: var(--radius-lg);
  padding: 1.7rem 1.5rem;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.card-blue   { --card-accent: var(--blue);   --card-accent-dark: var(--blue-dark);   --card-soft: var(--blue-soft); }
.card-green  { --card-accent: var(--green);  --card-accent-dark: var(--green-dark);  --card-soft: var(--green-soft); }
.card-orange { --card-accent: var(--orange); --card-accent-dark: var(--orange-dark); --card-soft: var(--orange-soft); }
.card-navy   { --card-accent: var(--navy-600); --card-accent-dark: var(--navy-800); --card-soft: #e9eef6; }

.card-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  margin-bottom: 1.1rem;
  border-radius: 14px;
  background: var(--card-soft);
  color: var(--card-accent-dark);
}

.card-icon svg {
  width: 28px;
  height: 28px;
}

.card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.4em;
}

.card p {
  color: var(--ink-soft);
  flex-grow: 1;
  margin-bottom: 1.4rem;
}

.btn-card {
  align-self: flex-start;
  padding: 0.6rem 1.25rem;
  font-size: 0.95rem;
  background: var(--card-accent-dark);
  color: #fff;
}

.btn-card:hover {
  filter: brightness(1.12);
}

/* Trust list ----------------------------------------------------------------- */

.section-trust {
  background: var(--surface);
}

.trust-list {
  list-style: none;
  margin: 1.8rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.trust-list li {
  position: relative;
  padding: 0.9rem 1.2rem 0.9rem 3.4rem;
  background: var(--surface-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  font-weight: 600;
}

.trust-list li::before {
  content: "";
  position: absolute;
  left: 1.1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--green)
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m5.5 12.5 4 4 9-9'/%3E%3C/svg%3E")
    center / 60% no-repeat;
}

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

.section-contact {
  background:
    radial-gradient(620px 300px at 85% -20%, rgba(247, 148, 30, 0.25), transparent 60%),
    linear-gradient(120deg, var(--navy-800) 0%, var(--blue-dark) 100%);
  color: var(--on-dark);
}

.contact-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.6rem;
  flex-wrap: wrap;
}

.section-contact h2 {
  color: var(--on-dark);
  font-size: clamp(1.4rem, 3.5vw, 1.9rem);
  margin: 0;
  max-width: 26ch;
}

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

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

.site-footer {
  background: var(--navy-900);
  color: var(--on-dark-soft);
  padding-block: 3rem 1.6rem;
  font-size: 0.95rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-lockup {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.footer-brand p {
  margin-bottom: 0.3rem;
  max-width: 40ch;
}

.footer-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.6rem;
}

.footer-nav a {
  color: var(--on-dark-soft);
  text-decoration: none;
  padding-block: 0.3rem;
  display: inline-block;
}

.footer-nav a:hover {
  color: var(--on-dark);
  text-decoration: underline;
}

.footer-legal {
  padding-top: 1.4rem;
}

.footer-legal p {
  margin: 0;
  font-size: 0.85rem;
}

/* Responsive: mobile navigation ------------------------------------------------- */

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .primary-nav {
    display: none;
    flex-basis: 100%;
  }

  .primary-nav.is-open {
    display: block;
  }

  .primary-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0.3rem;
    padding-block: 0.4rem 1rem;
  }

  .primary-nav a {
    display: block;
    padding: 0.8rem 1rem;
    border-radius: var(--radius-md);
    font-size: 1.05rem;
  }

  .primary-nav a.nav-cta {
    text-align: center;
    margin-top: 0.3rem;
  }

  .contact-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .hero-actions .btn {
    flex-basis: 100%;
  }

  .contact-actions {
    width: 100%;
  }

  .contact-actions .btn {
    flex-grow: 1;
  }
}

/* Motion preferences -------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

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