/* FallGuard — shared styles
   Plain CSS, no build tools, no external dependencies. */

/* ---------- Design tokens ---------- */
:root {
  --color-bg: #070c18;
  --color-surface: #141d2e;
  --color-surface-alt: #0b1220;
  --color-surface-tint: #1b2742;
  --color-text: #e7edf5;
  --color-heading: #f5f8fc;
  --color-text-muted: #94a3b8;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #7eb6ff;
  --color-accent: #0ea5a4;
  --color-accent-bright: #14b8a6;
  --color-danger: #f87171;
  --color-success: #4ade80;
  --color-warning: #fbbf24;
  --color-border: #28344a;

  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4.5rem;

  --radius: 0.85rem;
  --radius-lg: 1.25rem;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.30), 0 1px 3px rgba(0, 0, 0, 0.35);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.35), 0 10px 28px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.55);
  --max-width: 1100px;

  --gradient-brand: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-bright) 100%);

  --font: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-display: var(--font);

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--color-text);
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(20, 184, 166, 0.16), transparent 60%),
    radial-gradient(900px 500px at -10% 0%, rgba(37, 99, 235, 0.18), transparent 55%),
    var(--color-surface-alt);
  background-attachment: fixed;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--color-primary-light);
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--color-heading);
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.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;
}

.skip-link {
  position: absolute;
  left: var(--space-md);
  top: -3rem;
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius);
  z-index: 100;
  transition: top 0.2s var(--ease);
}

.skip-link:focus {
  top: var(--space-md);
}

/* ---------- Header / nav ---------- */
.site-header {
  background: rgba(13, 20, 35, 0.82);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding-block: var(--space-sm);
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: -0.01em;
  color: var(--color-heading);
}

.nav__brand:hover,
.nav__brand:focus {
  text-decoration: none;
}

.nav__logo {
  width: 1.85rem;
  height: 1.85rem;
  display: grid;
  place-items: center;
  border-radius: 0.55rem;
  background: var(--gradient-brand);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
  color: #fff;
  font-family: var(--font);
  font-weight: 800;
  font-size: 1rem;
}

.nav__toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  padding: var(--space-xs) var(--space-sm);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  color: var(--color-text);
}

.nav__list {
  list-style: none;
  display: flex;
  gap: var(--space-xs);
  margin: 0;
  padding: 0;
}

.nav__link {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  border-radius: 0.55rem;
  color: var(--color-text-muted);
  font-weight: 600;
  transition: color 0.18s var(--ease), background 0.18s var(--ease);
}

.nav__link:hover,
.nav__link:focus {
  color: var(--color-primary-light);
  background: var(--color-surface-tint);
  text-decoration: none;
}

.nav__link[aria-current="page"] {
  color: var(--color-primary-light);
  background: var(--color-surface-tint);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.01em;
  border: 2px solid transparent;
  cursor: pointer;
  font-size: 1rem;
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease),
    background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.btn--primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.28);
}

.btn--primary:hover,
.btn--primary:focus {
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(37, 99, 235, 0.36);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary-light);
  border-color: var(--color-primary-light);
}

.btn--ghost:hover,
.btn--ghost:focus {
  background: var(--color-primary);
  color: #fff;
  text-decoration: none;
  transform: translateY(-2px);
}

/* ---------- Layout sections ---------- */
main {
  display: block;
}

.section {
  padding-block: var(--space-xl);
}

.section--tight {
  padding-block: var(--space-lg);
}

.section__title {
  font-size: clamp(1.7rem, 4vw, 2.35rem);
  margin-top: 0;
  margin-bottom: var(--space-xs);
}

.section__lead {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  max-width: 62ch;
  margin-top: 0;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background:
    radial-gradient(800px 400px at 78% 12%, rgba(20, 184, 166, 0.45), transparent 60%),
    radial-gradient(700px 420px at 10% 90%, rgba(56, 189, 248, 0.30), transparent 55%),
    linear-gradient(155deg, #0b1220 0%, #16306b 55%, #0f766e 135%);
  color: #fff;
  padding-block: calc(var(--space-xl) + 1rem);
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(70% 70% at 50% 30%, #000 0%, transparent 75%);
  mask-image: radial-gradient(70% 70% at 50% 30%, #000 0%, transparent 75%);
  opacity: 0.6;
}

.hero h1 {
  color: #fff;
  font-size: clamp(2.4rem, 6.5vw, 3.75rem);
  margin: 0 0 var(--space-md);
}

.hero__tag {
  display: inline-block;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #e0f2fe;
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-md);
}

.hero__lead {
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  color: #dbe7f5;
  max-width: 58ch;
  margin: 0 0 var(--space-lg);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.hero .btn--ghost {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.7);
}

.hero .btn--ghost:hover,
.hero .btn--ghost:focus {
  background: #fff;
  color: var(--color-primary);
}

/* ---------- Generic grids ---------- */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

/* ---------- Cards ---------- */
.card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow);
  transition: translate 0.22s var(--ease), box-shadow 0.22s var(--ease),
    border-color 0.22s var(--ease);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  background: var(--gradient-brand);
  opacity: 0;
  transition: opacity 0.22s var(--ease);
}

.card:hover {
  translate: 0 -4px;
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.card:hover::before {
  opacity: 1;
}

.card__icon {
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  border-radius: 0.85rem;
  background: var(--color-surface-tint);
  color: var(--color-primary-light);
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
  box-shadow: inset 0 0 0 1px rgba(126, 182, 255, 0.18);
}

.card h3 {
  margin: 0 0 var(--space-xs);
  font-size: 1.2rem;
}

.card p {
  margin: 0;
  color: var(--color-text-muted);
}

/* ---------- Numbered steps ---------- */
.steps {
  list-style: none;
  counter-reset: step;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-lg);
}

.steps__item {
  counter-increment: step;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-md);
  align-items: start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow);
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

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

.steps__item::before {
  content: counter(step);
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: #fff;
  font-weight: 800;
  font-size: 1.15rem;
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
}

.steps__item h3 {
  margin: 0 0 var(--space-xs);
}

.steps__item p {
  margin: 0;
  color: var(--color-text-muted);
}

/* ---------- Creator ---------- */
.creator {
  display: grid;
  grid-template-columns: minmax(260px, 320px) 1fr;
  gap: var(--space-xl);
  align-items: center;
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.06), rgba(20, 184, 166, 0.06)),
    var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow);
}

/* Portrait (left): styled placeholder behind a swappable <img>. */
.creator__portrait {
  position: relative;
  isolation: isolate;
  margin: 0;
  width: 100%;
  aspect-ratio: 4 / 5;
  min-height: 320px;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--gradient-brand);
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.32);
}

/* Fallback shown while images/founder.jpg is missing or fails to load. */
.creator__portrait-fallback {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: grid;
  place-items: center;
  background: var(--gradient-brand);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(3rem, 8vw, 4.5rem);
  letter-spacing: 0.04em;
}

.creator__portrait-img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  /* Keeps the box looking intentional if the file isn't there yet. */
  color: transparent;
}

.creator__eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.creator__name {
  margin: 0;
  font-size: clamp(1.4rem, 3vw, 1.8rem);
}

.creator__role {
  margin: 0.15rem 0 var(--space-sm);
  font-weight: 600;
  color: var(--color-text-muted);
}

.creator__bio {
  margin: 0 0 var(--space-md);
  color: var(--color-text);
  max-width: 60ch;
}

.creator__contact {
  margin: 0;
}

/* ---------- Forms ---------- */
.form {
  display: grid;
  gap: var(--space-md);
  max-width: 520px;
}

.form__group {
  display: grid;
  gap: var(--space-xs);
}

.form__group label {
  font-weight: 600;
}

.form__group input,
.form__group textarea {
  font: inherit;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: 0.6rem;
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.form__group input::placeholder,
.form__group textarea::placeholder {
  color: var(--color-text-muted);
  opacity: 1;
}

.form__group input:focus,
.form__group textarea:focus {
  border-color: var(--color-primary-light);
  outline: none;
  box-shadow: 0 0 0 3px rgba(126, 182, 255, 0.25);
}

.form__note {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* ---------- Support info ---------- */
.support-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-md);
}

.support-list li {
  display: grid;
  gap: 0.15rem;
}

.support-list .support-label {
  font-weight: 700;
}

/* ---------- Footer ---------- */
.site-footer {
  background:
    radial-gradient(700px 300px at 100% 0%, rgba(20, 184, 166, 0.12), transparent 60%),
    var(--color-bg);
  color: #cbd5e1;
  margin-top: var(--space-xl);
}

.site-footer a {
  color: #cbd5e1;
  transition: color 0.18s var(--ease);
}

.site-footer a:hover,
.site-footer a:focus {
  color: #fff;
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  justify-content: space-between;
  padding-block: var(--space-lg);
}

.site-footer__brand {
  font-family: var(--font-display);
  font-weight: 800;
  color: #fff;
  font-size: 1.2rem;
}

.site-footer__nav {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin: 0;
  padding: 0;
}

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-block: var(--space-md);
  font-size: 0.9rem;
  color: #94a3b8;
}

/* ---------- Utilities ---------- */
.mt-lg {
  margin-top: var(--space-lg);
}

.text-center {
  text-align: center;
}

/* ---------- Entrance polish (CSS-only) ---------- */
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero > .container > * {
  animation: fade-up 0.7s var(--ease) both;
}

.hero__tag { animation-delay: 0.02s; }
.hero h1 { animation-delay: 0.08s; }
.hero__lead { animation-delay: 0.16s; }
.hero__actions { animation-delay: 0.24s; }

.card,
.steps__item,
.creator {
  animation: fade-up 0.6s var(--ease) both;
}

.grid .card:nth-child(2) { animation-delay: 0.08s; }
.grid .card:nth-child(3) { animation-delay: 0.16s; }
.grid .card:nth-child(4) { animation-delay: 0.24s; }
.grid .card:nth-child(5) { animation-delay: 0.32s; }
.grid .card:nth-child(6) { animation-delay: 0.40s; }

.steps__item:nth-child(2) { animation-delay: 0.08s; }
.steps__item:nth-child(3) { animation-delay: 0.16s; }
.steps__item:nth-child(4) { animation-delay: 0.24s; }

/* ---------- Responsive ---------- */
@media (max-width: 800px) {
  .grid--3,
  .grid--2 {
    grid-template-columns: 1fr;
  }

  .creator {
    grid-template-columns: 1fr;
    text-align: center;
    justify-items: center;
  }

  .creator__portrait {
    width: 100%;
    max-width: 320px;
  }

  .nav__toggle {
    display: inline-block;
  }

  .nav__list {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    flex-direction: column;
    gap: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-sm) var(--space-md) var(--space-md);
    box-shadow: var(--shadow);
  }

  .nav {
    position: relative;
  }

  .nav__list.is-open {
    display: flex;
  }

  .nav__link {
    display: block;
    padding: var(--space-sm);
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}