/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { min-height: 100vh; line-height: 1.6; -webkit-font-smoothing: antialiased; }
img, svg { display: block; max-width: 100%; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; border: none; background: none; cursor: pointer; }

/* ===== CSS VARIABLES ===== */
:root {
  --color-primary: #0B3D91;
  --color-secondary: #1A5BBF;
  --color-accent: #FF6B35;
  --color-neon: #39FF14;
  --color-white: #FFFFFF;
  --color-muted: #E0E6ED;
  --color-dark: #0A1F3D;
  --color-gold: #FFD700;

  --font-heading: 'Poppins', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-data: 'Playfair Display', Georgia, serif;

  --header-height: 80px;
  --header-upper-height: 48px;
  --content-max: 1200px;
  --gap-xs: 8px;
  --gap-sm: 16px;
  --gap-md: 24px;
  --gap-lg: 48px;
  --gap-xl: 80px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --border-light: 1px solid rgba(224, 230, 237, 0.2);
  --shadow-header: 0 2px 24px rgba(10, 31, 61, 0.3);
  --transition: 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ===== TYPOGRAPHY ===== */
body {
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--color-white);
  background-color: var(--color-primary);
}
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2.2rem, 5.5vw, 3.5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.3rem, 3vw, 1.8rem); }
p { margin-bottom: var(--gap-sm); max-width: 72ch; }
small { font-size: 0.875em; color: var(--color-muted); }

/* ===== SKIP LINK ===== */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--gap-sm);
  z-index: 9999;
  padding: var(--gap-xs) var(--gap-sm);
  background: var(--color-accent);
  color: var(--color-white);
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: top 0.2s;
}
.skip-link:focus {
  top: var(--gap-xs);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}
.btn--accent {
  background: var(--color-accent);
  color: var(--color-white);
}
.btn--accent:hover {
  background: #e55a2b;
  box-shadow: 0 0 20px rgba(255, 107, 53, 0.35);
}
.btn--accent:focus-visible {
  outline: 2px solid var(--color-neon);
  outline-offset: 2px;
}
.btn--outline {
  background: transparent;
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.4);
}
.btn--outline:hover {
  border-color: var(--color-neon);
  color: var(--color-neon);
}

/* ===== SITE HEADER ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 61, 145, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: var(--border-light);
  transition: background var(--transition), box-shadow var(--transition);
}
.site-header.scrolled {
  background: rgba(10, 31, 61, 0.95);
  box-shadow: var(--shadow-header);
}
.header-upper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 8px var(--gap-md);
  min-height: var(--header-upper-height);
}
.header-brand {
  display: flex;
  align-items: baseline;
  gap: var(--gap-sm);
}
.brand-logo {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: 0.04em;
  color: var(--color-white);
  position: relative;
}
.brand-logo::after {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-left: 6px;
  background: var(--color-neon);
  border-radius: 1px;
  vertical-align: middle;
  opacity: 0.8;
}
.brand-sub {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--color-muted);
  letter-spacing: 0.03em;
  display: none;
}
@media (min-width: 640px) {
  .brand-sub { display: inline; }
}
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
}
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  gap: 5px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition);
}
.nav-toggle:hover { border-color: var(--color-accent); }
.nav-toggle:focus-visible {
  outline: 2px solid var(--color-neon);
  outline-offset: 2px;
}
.nav-toggle__line {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-white);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
@media (min-width: 768px) {
  .nav-toggle { display: none; }
}

/* ===== HEADER LOWER & NAV ===== */
.header-lower {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--gap-md);
  overflow: hidden;
  transition: max-height var(--transition);
}
.header-nav {
  padding: 4px 0 12px 0;
}
.nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nav-link {
  display: block;
  padding: 10px 16px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  color: var(--color-white);
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
  position: relative;
}
.nav-link:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-neon);
}
.nav-link:focus-visible {
  outline: 2px solid var(--color-neon);
  outline-offset: -2px;
}
.nav-link[aria-current="page"] {
  background: rgba(10, 31, 61, 0.5);
  color: var(--color-neon);
  border-left: 3px solid var(--color-neon);
}
@media (min-width: 768px) {
  .header-lower {
    max-height: none !important;
    padding: 0 var(--gap-md);
  }
  .header-nav {
    padding: 0 0 10px 0;
  }
  .nav-list {
    flex-direction: row;
    gap: 4px;
  }
  .nav-link {
    padding: 8px 18px;
    font-size: 0.85rem;
  }
  .nav-link[aria-current="page"] {
    border-left: none;
    border-bottom: 3px solid var(--color-neon);
  }
}
@media (max-width: 767px) {
  .header-lower:not([data-open]) {
    max-height: 0 !important;
  }
  .header-lower[data-open] {
    max-height: 420px;
  }
}

/* ===== SITE FOOTER ===== */
.site-footer {
  background: var(--color-dark);
  border-top: 1px solid rgba(57, 255, 20, 0.08);
  padding: var(--gap-lg) var(--gap-md) var(--gap-sm);
}
.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-md);
}
@media (min-width: 640px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
  .footer-brand { grid-column: 1 / 2; }
  .footer-links { grid-column: 2 / 3; text-align: right; }
  .footer-contact { grid-column: 1 / 3; }
  .footer-trust { grid-column: 1 / 3; }
  .footer-extra { grid-column: 1 / 3; display: flex; justify-content: space-between; }
}
@media (min-width: 960px) {
  .footer-inner {
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: var(--gap-lg);
  }
  .footer-brand { grid-column: 1 / 2; }
  .footer-links { grid-column: 2 / 3; text-align: left; }
  .footer-contact { grid-column: 3 / 4; text-align: right; }
  .footer-trust { grid-column: 1 / 4; }
  .footer-extra { grid-column: 1 / 4; display: flex; justify-content: space-between; }
}
.footer-logo {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.6rem;
  color: var(--color-white);
  letter-spacing: 0.04em;
  display: block;
  margin-bottom: 4px;
}
.footer-logo::after {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-left: 8px;
  background: var(--color-accent);
  border-radius: 1px;
  vertical-align: middle;
}
.footer-tagline {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 0;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--gap-xs);
}
.footer-link {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-muted);
  padding: 4px 0;
  transition: color var(--transition);
  border-bottom: 1px solid transparent;
}
.footer-link:hover {
  color: var(--color-neon);
  border-bottom-color: var(--color-neon);
}
.footer-link:focus-visible {
  outline: 2px solid var(--color-neon);
  outline-offset: 4px;
}
.footer-contact p {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 4px;
  line-height: 1.5;
}
.footer-contact a {
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.footer-contact a:hover {
  color: var(--color-neon);
  border-color: var(--color-neon);
}
.footer-trust {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: var(--gap-sm);
}
.trust-statement {
  font-size: 0.8rem;
  color: var(--color-muted);
  opacity: 0.7;
  margin-bottom: 0;
  text-align: center;
}
.footer-extra {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: var(--gap-sm);
  font-size: 0.75rem;
  color: rgba(224, 230, 237, 0.5);
}
.footer-icp {
  letter-spacing: 0.02em;
}

/* ===== PROGRESS BAR ===== */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-neon), var(--color-accent));
  z-index: 1001;
  pointer-events: none;
  transition: width 0.1s linear;
}
@media (prefers-reduced-motion: reduce) {
  .progress-bar { display: none; }
}

/* ===== BACK TO TOP ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 999;
  width: 48px;
  height: 48px;
  background: var(--color-dark);
  border: 1px solid rgba(57, 255, 20, 0.3);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-neon);
  font-size: 1.3rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition), border-color var(--transition);
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  border-color: var(--color-neon);
  background: var(--color-primary);
}
.back-to-top:focus-visible {
  outline: 2px solid var(--color-neon);
  outline-offset: 4px;
}
.back-to-top::after {
  content: '↑';
  font-weight: 700;
  line-height: 1;
}
@media (prefers-reduced-motion: reduce) {
  .back-to-top { display: none; }
}

/* ===== MEDIA CONTAINER (placeholder) ===== */
.media-container {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: rgba(10, 31, 61, 0.4);
  border: 1px solid rgba(57, 255, 20, 0.08);
  border-radius: var(--radius-sm);
}
.media-container::before {
  content: '';
  display: block;
  padding-top: 56.25%;
}
.media-container--portrait::before { padding-top: 125%; }
.media-container--square::before { padding-top: 100%; }
.media-container--wide::before { padding-top: 42%; }

/* ===== UTILITY ===== */
.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--gap-md);
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ===== FOCUS VISIBLE ===== */
:focus-visible {
  outline: 2px solid var(--color-neon);
  outline-offset: 2px;
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}