@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700;800&display=swap');

:root {
  --radius: 12px;

  /* TYPOGRAPHY SCALE */
  --font-size-xs:   0.75rem
  --font-size-sm:   0.875rem
  --font-size-base: 1rem
  --font-size-md:   1.125rem
  --font-size-lg:   1.25rem
  --font-size-xl:   1.5rem
  --font-size-2xl:  2rem
  --font-size-3xl:  2.75rem
  --font-size-hero: 3.5rem
  --line-height-tight: 1.2
  --line-height-base:  1.6
  --font-weight-normal: 400
  --font-weight-medium: 500
  --font-weight-bold:   700

  /* COLOR PALETTE (DARK BIOLUMINESCENT THEME) */
  --color-bg: #040810
  --color-bg-alt: #0b1117
  --color-bg-card: #0b1117

  --color-text: #E8E8E8
  --color-text-muted: #A0A0A0
  --color-text-on-primary: #FFFFFF

  --color-primary: #00E5C8        /* emerald-green */
  --color-secondary: #00CBA2
  --color-accent: #E040FB         /* soft magenta */

  --color-border: #1e2a2a
  --color-shadow: 0 6px 20px rgba(0,0,0,0.5)
}

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

html, body { height: 100%; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, Arial;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: var(--line-height-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, video, iframe { max-width: 100%; height: auto; display: block; }

h1, h2, h3, h4, p, ul, ol, a, strong, em { color: inherit; }

.container {
  width: 100%;
  padding: 0 1rem;
  margin: 0 auto;
  max-width: 1320px;
  /* MANDATORY: margin centered at all breakpoints via media queries as well */
}

.section { padding: 4.5rem 0; position: relative; }

.section-title { font-size: var(--font-size-2xl); margin-bottom: 0.75rem; color: var(--color-text); }

.hero {
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 1rem;
  background: linear-gradient(135deg, rgba(0,0,0,0.75), rgba(0,0,0,0.6)), var(--color-bg);
  color: var(--color-text);
}
.hero-content { text-align: center; }
.hero-countdown { display: flex; align-items: center; justify-content: center; gap: 0.5rem; margin: 1.5rem auto; }
.hero-cd-block { display: flex; flex-direction: column; align-items: center; background: rgba(0,0,0,0.35); border: 1px solid var(--color-primary); border-radius: 6px; padding: 0.6rem 1.1rem; min-width: 64px; }
.hero-cd-block strong { font-size: 2.2rem; font-weight: 800; color: var(--color-primary); line-height: 1; }
.hero-cd-block span { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-text-muted); margin-top: 0.3rem; }
.hero-cd-sep { font-size: 2rem; font-weight: 700; color: var(--color-primary); padding-bottom: 1rem; }
.hero-cta { justify-content: center; display: flex; margin: 1.5rem 0; }
.hero-media { max-width: 700px; margin: 0 auto; }
.hero-img { width: 100%; border-radius: var(--radius); object-fit: cover; display: block; }

/* FABRICATE LAYOUT FOR HERO CONTENT INSIDE A FLEX BOX */
.hero h1 { font-size: var(--font-size-2xl); margin-bottom: 0.75rem; }

/* NAV BAR / HEADER */
.site-header {
  position: sticky;
  top: 0;
  min-height: 64px;
  overflow: visible;
  background: rgba(4,8,16,0.95);
  z-index: 1000;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}
.site-header .container {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 1rem;
  width: 100%;
}

.site-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  overflow: hidden;
  max-height: 52px;
  text-decoration: none;
}
.site-logo img {
  height: 44px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
  display: block;
}

.nav-toggle-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}

.nav-toggle-label {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  margin-left: auto;
  padding: 0.4rem 0.6rem;
  z-index: 200;
  border-radius: 6px;
  background: rgba(0,0,0,0.45);
  border: 1.5px solid rgba(255,255,255,0.7);
}
.nav-toggle-label span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #ffffff;
  border-radius: 2px;
  transition: 0.2s ease;
}

.site-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  z-index: 500;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 4px 16px rgba(0,0,0,0.18);
}
.nav-toggle-input:checked ~ .site-nav { display: block; }

/* NAV LIST */
.nav-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0.5rem 0;
  margin: 0;
  list-style: none;
}
.nav-link {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  text-decoration: none;
  padding: 0.75rem 1rem;
  display: inline-block;
  transition: color 0.2s ease, transform 0.2s ease;
}
.nav-link:hover { color: var(--color-accent); transform: translateY(-1px); }

/* DROPDOWN NAV */
.nav-dropdown { position: relative; }
.nav-dropdown-toggle { cursor: pointer; white-space: nowrap; }
.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  z-index: 9999;
  list-style: none;
  margin: 0;
  padding: 0.5rem 0;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius, 6px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.18);
  white-space: nowrap;
}
.nav-dropdown:hover > .nav-dropdown-menu,
.nav-dropdown:focus-within > .nav-dropdown-menu {
  display: block;
}
.nav-dropdown-menu .nav-link {
  display: block;
  padding: 0.5rem 1.25rem;
  width: 100%;
  border-bottom: none;
}
.nav-dropdown-menu .nav-link:hover { background: var(--color-bg-alt); }

/* MOBILE ADJUSTMENTS FOR DROPDOWN */
@media (max-width: 767px) {
  .site-nav { display: none; }
  .nav-list { flex-direction: column; }
  .nav-dropdown-menu {
    position: static;
    box-shadow: none;
    border: none;
    padding-left: 1rem;
    display: none;
  }
  .nav-dropdown:focus-within > .nav-dropdown-menu { display: none; }
}

/* RESPONSIVE LAYOUTS */
@media (min-width: 768px) {
  /* NAV LAYOUT: all-centered */
  .site-header .container { justify-content: center; gap: 2rem; }
  .site-nav { display: flex; align-items: center; justify-content: center; }
  .nav-list { justify-content: center; flex-direction: row !important; align-items: center; gap: 1.5rem; padding: 0; margin: 0; list-style: none; }
  .nav-link { font-size: var(--font-size-sm); padding: 0.4rem 0.75rem; }
  .nav-toggle-label { display: none !important; }

  /* CONTAINER CENTRING */
  .container { margin: 0 auto; }

  /* HERO HEIGHT AND TEXT SCALE ON TABLET/DESKTOP */
  .hero { min-height: 60vh; }
  .hero h1 { font-size: var(--font-size-3xl); }

  /* CARD GRID ON TABLET/DESKTOP */
  .card-grid { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 2rem; }

  /* SECTION BACKGROUND BEHAVIOR ON EVEN SECTIONS (FULL BLEED) */
  .section { padding: 4.5rem 0; }
  .section:nth-child(even) {
    background: var(--color-bg-alt);
    margin-left: calc(50% - 50vw);
    margin-right: calc(50% - 50vw);
    width: 100vw;
  }

  /* FOOTER LAYOUT ON DESKTOP */
  .footer-inner { flex-direction: row; text-align: left; }
}

@media (min-width: 1024px) {
  .container { max-width: 1320px; padding: 0 2rem; }
  .hero { min-height: 70vh; }
  .hero h1 { font-size: var(--font-size-hero); }
  .section { padding: 4rem 0; }
  /* NAV links on tablet/desktop already covered above with 768px breakpoint rules */
}

/* FORMS (inputs, selects, textareas, labels) */
label { display: block; font-size: var(--font-size-xs); color: var(--color-text-muted); margin-bottom: 0.25rem; }
input, textarea, select {
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 0.6rem 0.75rem;
  width: 100%;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.2);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(0,229,200,0.15);
}
button[type="submit"] {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  border: none;
  padding: 0.75rem 1.25rem;
  border-radius: 6px;
  cursor: pointer;
  transition: transform 0.2s ease, filter 0.2s ease;
}
button[type="submit"]:hover { filter: brightness(0.95); transform: translateY(-1px); }

/* BUTTON UTILS */
.btn { display: inline-block; padding: 0.5rem 0.75rem; border-radius: 6px; font-size: var(--font-size-sm); font-weight: var(--font-weight-medium); text-decoration: none; color: var(--color-text); border: 1px solid transparent; transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease; }
.btn-primary { background: var(--color-primary); color: var(--color-text-on-primary); border: 0; }
.btn-secondary { background: transparent; color: var(--color-text); border: 1px solid var(--color-border); }

/* FOOTER */
.site-footer { background: var(--color-bg-alt); color: var(--color-text); padding: 2rem 0; }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem; padding: 0 1rem; }

/* CARDS (MANDATORY STRUCTURE) */
.card { display: flex; flex-direction: column; border-radius: var(--radius); overflow: hidden; background: var(--color-bg-card); box-shadow: var(--color-shadow); transition: transform 0.2s ease, box-shadow 0.2s ease; }
.card:hover { transform: translateY(-4px); box-shadow: 0 6px 18px rgba(0,0,0,0.6); }
.card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block; border-top-left-radius: var(--radius); border-top-right-radius: var(--radius); }
.card > *:not(img) { padding: 1rem 1.25rem; }
.card h3, .card h4 { margin-top: 0; margin-bottom: 0.5rem; }
.card p { margin: 0; line-height: var(--line-height-base); color: var(--color-text-muted); }

/* FAQ ACCORDION (CSS-ONLY) */
.faq-section { padding: 4.5rem 0; }
.faq-item { border: 1px solid var(--color-border); border-radius: var(--radius, 8px); margin-bottom: 0.75rem; background: var(--color-bg-card); overflow: hidden; transition: 0.2s ease; }
.faq-item[open] { border-color: var(--color-primary); box-shadow: 0 2px 12px var(--color-shadow); }
.faq-question { display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.25rem; cursor: pointer; font-weight: var(--font-weight-bold); font-size: var(--font-size-md); list-style: none; user-select: none; }
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after { content: "+"; font-size: 1.5rem; font-weight: 300; color: var(--color-primary); flex-shrink: 0; transition: transform 0.2s ease; }
.faq-item[open] > .faq-question::after { content: "−"; }
.faq-answer { padding: 0 1.25rem 1.25rem; border-top: 1px solid var(--color-border); }
.faq-answer p { margin: 0.75rem 0 0; color: var(--color-text-muted); line-height: var(--line-height-base); }

/* NAV LINK RESPONSIVENESS (override font size per breakpoint) */
@media (max-width: 767px) {
  .nav-link { font-size: var(--font-size-xs); }
}
@media (min-width: 768px) {
  .nav-link { font-size: var(--font-size-sm); }
}