/* =============================================================================
   Mass Open — one-page site styles
   Dark, retro sci-fi theme carried over from the original landing page.
   ========================================================================== */

:root {
  --accent: #5aa9ff;
  --accent-dark: #2f6df0;
  --ink: #eaf2ff;
  --ink-dim: #b9cdf0;
  --ink-faint: #6f86b8;
  --bg: #050816;
  --bg-panel: rgba(7, 12, 35, 0.72);
  --border: rgba(90, 169, 255, 0.25);
  --border-strong: rgba(90, 169, 255, 0.4);
  --header-h: 64px;
  --maxw: 1040px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  /* Offset anchored sections so the sticky header never overlaps them. */
  scroll-padding-top: var(--header-h);
}

body {
  margin: 0;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background-color: var(--bg);
  background-image: url("../mass-open-bg.svg");
  background-repeat: repeat;
  background-size: 240px 240px;
  background-attachment: fixed;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--accent); }
.accent { color: var(--accent); }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* Accessibility: keyboard skip link -------------------------------------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 10px 16px;
  background: var(--accent);
  color: var(--bg);
  border-radius: 0 0 8px 0;
  font-weight: 700;
}
.skip-link:focus { left: 0; }

/* =============================================================================
   Header / nav
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(5, 8, 22, 0.82);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav {
  max-width: var(--maxw);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__brand {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  color: #fff;
  text-decoration: none;
}

.nav__menu {
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav__link {
  color: var(--ink-dim);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.nav__link:hover,
.nav__link:focus,
.nav__link.is-active {
  color: #fff;
  border-color: var(--accent);
}

.nav__toggle {
  display: none;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  cursor: pointer;
  position: relative;
}
.nav__bars,
.nav__bars::before,
.nav__bars::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 18px;
  height: 2px;
  background: var(--ink);
  transform: translateX(-50%);
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav__bars { top: 50%; transform: translate(-50%, -50%); }
.nav__bars::before { top: -6px; }
.nav__bars::after { top: 6px; }
.nav__toggle[aria-expanded="true"] .nav__bars { background: transparent; }
.nav__toggle[aria-expanded="true"] .nav__bars::before { top: 0; transform: translateX(-50%) rotate(45deg); }
.nav__toggle[aria-expanded="true"] .nav__bars::after { top: 0; transform: translateX(-50%) rotate(-45deg); }

/* =============================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  text-align: center;
  padding: 80px 0;
}

.hero__inner { width: 100%; }

.hero__eyebrow {
  margin: 0 0 18px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.8rem;
  color: var(--accent);
}

.hero__title {
  margin: 0 0 24px;
  font-size: clamp(2.6rem, 10vw, 5.5rem);
  font-weight: 800;
  letter-spacing: 0.03em;
  line-height: 1.02;
  color: #fff;
  text-shadow: 0 0 24px rgba(90, 169, 255, 0.5);
}

.hero__lede {
  margin: 0 auto 36px;
  max-width: 560px;
  font-size: 1.15rem;
  color: var(--ink-dim);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

.hero__scroll {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  font-size: 1.5rem;
  color: var(--ink-faint);
  text-decoration: none;
  animation: bob 2s ease-in-out infinite;
}
@keyframes bob {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 6px); }
}
@media (prefers-reduced-motion: reduce) {
  .hero__scroll { animation: none; }
}

/* =============================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-block;
  padding: 13px 26px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.08s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.btn:active { transform: translateY(1px); }

.btn--primary {
  color: #050816;
  background: linear-gradient(180deg, var(--accent), var(--accent-dark));
}
.btn--primary:hover { box-shadow: 0 0 24px rgba(90, 169, 255, 0.6); }

.btn--ghost {
  color: var(--ink);
  background: transparent;
  border-color: var(--border-strong);
}
.btn--ghost:hover { border-color: var(--accent); color: #fff; }

/* =============================================================================
   Generic sections
   ========================================================================== */
.section {
  padding: 96px 0;
  border-top: 1px solid var(--border);
}
.section--alt { background: rgba(5, 8, 22, 0.55); }

.section__eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.8rem;
  color: var(--accent);
}

.section__title {
  margin: 0 0 28px;
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.01em;
}

.section__lead {
  max-width: 680px;
  font-size: 1.1rem;
  color: var(--ink-dim);
}
.section__lead p { margin: 0 0 1em; }
.section__lead strong { color: var(--ink); }

/* Cards (Community) ------------------------------------------------------- */
.cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px 26px;
  box-shadow: 0 0 40px rgba(47, 109, 240, 0.12);
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.card:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.card__icon { display: block; font-size: 2rem; margin-bottom: 14px; }
.card__title { margin: 0 0 10px; font-size: 1.25rem; color: #fff; }
.card__body { margin: 0; color: var(--ink-dim); }

/* Steps (Get Involved) ---------------------------------------------------- */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}
.step {
  display: flex;
  gap: 22px;
  align-items: flex-start;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px 26px;
}
.step__num { font-size: 1.6rem; font-weight: 800; line-height: 1; min-width: 2ch; }
.step__title { margin: 0 0 6px; font-size: 1.2rem; color: #fff; }
.step__body p { margin: 0; color: var(--ink-dim); }


/* dates (Upcoming Events) ------------------------------------------------- */
.dates {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}
.date {
  display: flex;
  gap: 22px;
  align-items: flex-start;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px 26px;
}
.date__num { font-size: 1.6rem; font-weight: 800; line-height: 1; min-width: 2ch; }
.date__title { margin: 0 0 6px; font-size: 1.2rem; color: #fff; }
.date__body p { margin: 0; color: var(--ink-dim); }


/* Essay link (Read) ------------------------------------------------------- */
.essay-link {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 24px;
  padding: 24px 28px;
  text-decoration: none;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.essay-link:hover { border-color: var(--accent); transform: translateY(-2px); }
.essay-link__label {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  color: var(--accent);
  flex: 0 0 auto;
}
.essay-link__title { flex: 1; color: var(--ink); font-size: 1.1rem; font-weight: 600; }
.essay-link__arrow { font-size: 1.4rem; flex: 0 0 auto; }

/* Join / signup ----------------------------------------------------------- */
.section--join { text-align: center; }
.section--join .section__eyebrow,
.section--join .section__lead { margin-left: auto; margin-right: auto; }

.signup {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin: 32px auto 0;
  max-width: 560px;
}
.signup__input {
  flex: 1 1 260px;
  min-width: 0;
  padding: 14px 16px;
  font-size: 1rem;
  color: var(--ink);
  background: rgba(5, 8, 22, 0.8);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
}
.signup__input::placeholder { color: var(--ink-faint); }
.signup__input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(90, 169, 255, 0.25);
}
.signup__button { flex: 0 0 auto; }
.signup__note {
  margin-top: 18px;
  min-height: 1.2em;
  font-size: 0.95rem;
  color: var(--accent);
}

/* =============================================================================
   Footer
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--border);
  background: rgba(5, 8, 22, 0.85);
  padding: 48px 0;
  text-align: center;
}
.site-footer__brand { margin: 0 0 8px; font-size: 1.3rem; font-weight: 800; color: #fff; }
.site-footer__note { margin: 0 0 18px; color: var(--ink-dim); }
.site-footer__meta { margin: 0; font-size: 0.9rem; color: var(--ink-faint); }
.site-footer__meta a { color: var(--accent); }

/* =============================================================================
   Responsive — mobile nav
   ========================================================================== */
@media (max-width: 720px) {
  .nav__toggle { display: block; }
  .nav__menu {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(5, 8, 22, 0.97);
    border-bottom: 1px solid var(--border);
    padding: 8px 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }
  .nav__menu.is-open { max-height: 380px; }
  .nav__item { width: 100%; }
  .nav__link {
    display: block;
    padding: 14px 24px;
    border-bottom: none;
  }
  .nav__link:hover,
  .nav__link.is-active { border-color: transparent; background: rgba(90, 169, 255, 0.08); }

  .essay-link { flex-direction: column; align-items: flex-start; }
  .section { padding: 72px 0; }
}