/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; -moz-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body { min-height: 100vh; line-height: 1.6; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
img, svg, video { display: block; max-width: 100%; height: auto; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { font-weight: 400; line-height: 1.2; }
table { border-collapse: collapse; width: 100%; }
:focus-visible { outline: 2px solid #F4A261; outline-offset: 2px; }

/* ===== CSS VARIABLES ===== */
:root {
  --color-primary-red: #E63946;
  --color-primary-blue: #1D3557;
  --color-accent-yellow: #F4A261;
  --color-bg-dark: #0D1117;
  --color-surface-dark: #161B22;
  --color-text-primary: #E6EDF3;
  --color-text-secondary: #8B949E;
  --color-border: #30363D;
  --color-hover-highlight: #F4A261;
  --color-grid-line: #1D3557;
  --color-error: #E63946;
  --color-success: #2EA043;
  --color-overlay: rgba(0, 0, 0, 0.65);

  --font-headings: 'Bebas Neue', 'Impact', 'Arial Black', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-size-base: 16px;
  --font-scale: 1.25;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.563rem;
  --font-size-2xl: 1.953rem;
  --font-size-3xl: 2.441rem;
  --font-size-4xl: 3.052rem;

  --header-width-desktop: 280px;
  --header-height-mobile: 64px;
  --footer-logo-size: 1.75rem;
  --transition-speed: 0.25s;
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.3);
  --shadow-elevated: 0 8px 30px rgba(0, 0, 0, 0.5);
  --max-width-content: 1280px;
  --z-header: 1000;
  --z-nav-overlay: 900;
  --z-nav-drawer: 950;
  --z-progress: 1100;
  --z-skip: 9999;
}

/* ===== BASE TYPOGRAPHY ===== */
body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  background-color: var(--color-bg-dark);
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}

h1, h2, h3, h4, h5, h6 { font-family: var(--font-headings); color: var(--color-text-primary); letter-spacing: 0.04em; }
h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
p { margin-bottom: 1rem; color: var(--color-text-secondary); }
a { transition: color var(--transition-speed) ease; }
::selection { background: var(--color-primary-red); color: #fff; }

/* ===== SKIP LINK ===== */
.skip-link {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: var(--z-skip);
  padding: 0.75rem 1.5rem;
  background: var(--color-primary-red);
  color: #fff;
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--border-radius-sm);
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 1rem;
}

/* ===== HEADER (SIDE NAV) ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--header-width-desktop);
  height: 100vh;
  z-index: var(--z-header);
  background: var(--color-primary-blue);
  background-image:
    linear-gradient(135deg, rgba(230,57,70,0.08) 0%, transparent 50%),
    repeating-linear-gradient(0deg, transparent, transparent 40px, rgba(244,162,97,0.04) 40px, rgba(244,162,97,0.04) 41px);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
  transition: transform var(--transition-speed) ease;
}
.header-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 2rem 1.5rem;
  position: relative;
  z-index: 1;
}
.header-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--color-primary-red);
}
.header-logo {
  font-family: var(--font-headings);
  font-size: 2rem;
  color: var(--color-text-primary);
  letter-spacing: 0.08em;
  transition: color var(--transition-speed) ease;
  white-space: nowrap;
}
.header-logo:hover,
.header-logo:focus-visible {
  color: var(--color-accent-yellow);
}
.header-brand-divider {
  display: none;
}
.header-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.nav-item {
  position: relative;
}
.nav-link {
  display: block;
  padding: 0.75rem 1rem 0.75rem 1.5rem;
  font-family: var(--font-headings);
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  letter-spacing: 0.06em;
  border-left: 3px solid transparent;
  transition: all var(--transition-speed) ease;
  position: relative;
}
.nav-link::before {
  content: '';
  position: absolute;
  left: -3px;
  top: 50%;
  width: 3px;
  height: 0;
  background: var(--color-accent-yellow);
  transition: height var(--transition-speed) ease, top var(--transition-speed) ease;
}
.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-text-primary);
  border-left-color: var(--color-accent-yellow);
  padding-left: 2rem;
}
.nav-link:hover::before,
.nav-link:focus-visible::before {
  height: 100%;
  top: 0;
}
.nav-link[aria-current="page"] {
  color: var(--color-text-primary);
  border-left-color: var(--color-primary-red);
  background: linear-gradient(90deg, rgba(230,57,70,0.12) 0%, transparent 100%);
}
.nav-link[aria-current="page"]::after {
  content: '';
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--color-primary-red);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--color-primary-red);
}
.header-cta {
  margin-top: 1.5rem;
  text-align: center;
}
.header-cta.btn {
  display: block;
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: var(--font-headings);
  font-size: var(--font-size-lg);
  letter-spacing: 0.06em;
}
.nav-toggle {
  display: none;
  position: absolute;
  top: 50%;
  right: 1rem;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  z-index: 10;
  border-radius: var(--border-radius-sm);
  transition: background var(--transition-speed) ease;
}
.nav-toggle:hover,
.nav-toggle:focus-visible {
  background: rgba(244,162,97,0.15);
}
.nav-toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--transition-speed) ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.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: rotate(-45deg) translate(5px, -5px);
}

/* ===== MOBILE NAV OVERLAY ===== */
.nav-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-overlay);
  z-index: var(--z-nav-overlay);
}

/* ===== MAIN CONTENT ===== */
#main-content {
  grid-row: 2;
  grid-column: 1 / -1;
  min-height: calc(100vh - 200px);
  padding: 2rem 1.5rem;
  max-width: var(--max-width-content);
  margin: 0 auto;
  width: 100%;
  transition: margin-left var(--transition-speed) ease;
}

/* ===== FOOTER ===== */
.site-footer {
  grid-row: 3;
  grid-column: 1 / -1;
  position: relative;
  background: var(--color-surface-dark);
  border-top: 2px solid var(--color-border);
  overflow: hidden;
  margin-top: 3rem;
}
.footer-layer {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(160deg, rgba(230,57,70,0.06) 0%, transparent 40%),
    repeating-linear-gradient(45deg, transparent, transparent 20px, rgba(244,162,97,0.02) 20px, rgba(244,162,97,0.02) 21px);
  pointer-events: none;
}
.footer-inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
}
.footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
}
.footer-logo {
  font-family: var(--font-headings);
  font-size: var(--footer-logo-size);
  color: var(--color-text-primary);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 0.75rem;
}
.footer-tagline {
  font-size: var(--font-size-sm);
  color: var(--color-accent-yellow);
  margin-bottom: 0.75rem;
  letter-spacing: 0.04em;
}
.footer-trust {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.5;
  max-width: 360px;
}
.footer-group-title {
  font-family: var(--font-headings);
  font-size: var(--font-size-md);
  color: var(--color-text-primary);
  margin-bottom: 1rem;
  letter-spacing: 0.06em;
  position: relative;
  padding-left: 0.75rem;
  border-left: 3px solid var(--color-primary-red);
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.footer-link {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: all var(--transition-speed) ease;
  position: relative;
  display: inline-block;
  padding: 0.15rem 0;
}
.footer-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent-yellow);
  transition: width var(--transition-speed) ease;
}
.footer-link:hover,
.footer-link:focus-visible {
  color: var(--color-accent-yellow);
}
.footer-link:hover::after,
.footer-link:focus-visible::after {
  width: 100%;
}
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.footer-contact-item {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  padding-left: 1.25rem;
  position: relative;
}
.footer-contact-item::before {
  position: absolute;
  left: 0;
  top: 0.1rem;
  font-size: 0.75rem;
  color: var(--color-primary-red);
}
.footer-contact-email::before { content: '✉'; }
.footer-contact-phone::before { content: '📞'; }
.footer-contact-address::before { content: '📍'; }
.footer-contact-link {
  color: var(--color-text-secondary);
  transition: color var(--transition-speed) ease;
}
.footer-contact-link:hover,
.footer-contact-link:focus-visible {
  color: var(--color-accent-yellow);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1.5rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.footer-icp {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.footer-copyright {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* ===== GENERIC COMPONENTS ===== */
.container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 2rem;
  font-family: var(--font-headings);
  font-size: var(--font-size-md);
  letter-spacing: 0.06em;
  color: #fff;
  background: var(--color-primary-red);
  border: 2px solid var(--color-primary-red);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-speed) ease;
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.08);
  opacity: 0;
  transition: opacity var(--transition-speed) ease;
}
.btn:hover,
.btn:focus-visible {
  background: transparent;
  color: var(--color-accent-yellow);
  border-color: var(--color-accent-yellow);
  box-shadow: 0 0 20px rgba(244,162,97,0.25);
}
.btn:hover::after,
.btn:focus-visible::after {
  opacity: 1;
}

.btn-outline {
  background: transparent;
  border-color: var(--color-text-secondary);
  color: var(--color-text-primary);
}
.btn-outline:hover,
.btn-outline:focus-visible {
  border-color: var(--color-accent-yellow);
  color: var(--color-accent-yellow);
  background: rgba(244,162,97,0.08);
  box-shadow: 0 0 20px rgba(244,162,97,0.12);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.breadcrumb a {
  color: var(--color-text-secondary);
  transition: color var(--transition-speed) ease;
}
.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--color-accent-yellow);
}
.breadcrumb span[aria-current="page"] {
  color: var(--color-accent-yellow);
  font-weight: 600;
}
.breadcrumb-sep {
  color: var(--color-border);
  user-select: none;
}

.section {
  padding: 3rem 0;
}
.section-title {
  font-family: var(--font-headings);
  font-size: var(--font-size-3xl);
  color: var(--color-text-primary);
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.75rem;
  display: inline-block;
}
.section-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 60px;
  height: 3px;
  background: var(--color-primary-red);
}
.section-title::before {
  content: '//';
  color: var(--color-accent-yellow);
  margin-right: 0.5rem;
  font-size: 0.7em;
  opacity: 0.6;
}

.card {
  background: var(--color-surface-dark);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  transition: all var(--transition-speed) ease;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: transparent;
  transition: background var(--transition-speed) ease;
}
.card:hover,
.card:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--shadow-elevated);
  border-color: var(--color-accent-yellow);
}
.card:hover::before,
.card:focus-within::before {
  background: var(--color-accent-yellow);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.grid-col {
  min-width: 0;
}
.col-span-2 { grid-column: span 2; }
.col-span-3 { grid-column: span 3; }

.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--border-radius-sm);
  background: var(--color-primary-blue);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  transition: all var(--transition-speed) ease;
}
.tag:hover,
.tag:focus-visible {
  border-color: var(--color-accent-yellow);
  color: var(--color-accent-yellow);
  background: rgba(244,162,97,0.08);
}
.tag-red {
  background: rgba(230,57,70,0.15);
  color: var(--color-primary-red);
  border-color: rgba(230,57,70,0.3);
}
.tag-red:hover,
.tag-red:focus-visible {
  background: rgba(230,57,70,0.25);
  border-color: var(--color-primary-red);
  color: var(--color-primary-red);
}

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

/* ===== BACK TO TOP ===== */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary-blue);
  border: 2px solid var(--color-border);
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  z-index: 500;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-speed) ease;
  transform: translateY(20px);
  box-shadow: var(--shadow-card);
}
.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.back-to-top:hover,
.back-to-top:focus-visible {
  border-color: var(--color-accent-yellow);
  background: var(--color-surface-dark);
  color: var(--color-accent-yellow);
  box-shadow: 0 0 20px rgba(244,162,97,0.2);
}

/* ===== RESPONSIVE TABLET & BELOW ===== */
@media (max-width: 1023px) {
  body {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
  }
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height-mobile);
    flex-direction: row;
    background: var(--color-primary-blue);
    background-image: linear-gradient(135deg, rgba(230,57,70,0.06) 0%, transparent 60%);
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    transform: none;
  }
  .header-inner {
    flex-direction: row;
    align-items: center;
    padding: 0 1rem;
    height: 100%;
    width: 100%;
  }
  .header-brand {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
    flex-shrink: 0;
  }
  .header-logo {
    font-size: 1.5rem;
  }
  .header-nav {
    position: fixed;
    top: var(--header-height-mobile);
    left: 0;
    width: 100%;
    max-height: 0;
    overflow: hidden;
    background: var(--color-primary-blue);
    border-bottom: 1px solid var(--color-border);
    transition: max-height 0.35s ease, padding 0.35s ease;
    padding: 0 1rem;
    box-shadow: var(--shadow-elevated);
    z-index: var(--z-nav-drawer);
  }
  .header-nav[data-open] {
    max-height: 500px;
    padding: 1rem;
  }
  .nav-list {
    flex-direction: column;
    gap: 0.15rem;
  }
  .nav-link {
    padding: 0.7rem 1rem;
    border-left: 3px solid transparent;
    font-size: var(--font-size-md);
  }
  .nav-link:hover,
  .nav-link:focus-visible {
    padding-left: 1.5rem;
  }
  .nav-link[aria-current="page"] {
    border-left-color: var(--color-primary-red);
  }
  .nav-link[aria-current="page"]::after {
    right: 1rem;
  }
  .header-cta {
    display: none;
  }
  .header-cta.btn {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  #main-content {
    padding-top: calc(var(--header-height-mobile) + 1rem);
    margin-left: 0;
    padding-left: 1rem;
    padding-right: 1rem;
  }
  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
  .footer-brand { grid-column: 1 / -1; }
  .grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .col-span-2, .col-span-3 { grid-column: span 2; }
  .section-title { font-size: var(--font-size-2xl); }
  h1 { font-size: var(--font-size-3xl); }
  h2 { font-size: var(--font-size-2xl); }
}

/* ===== RESPONSIVE MOBILE ===== */
@media (max-width: 599px) {
  :root { --font-size-4xl: 2.2rem; --font-size-3xl: 1.8rem; --font-size-2xl: 1.5rem; }
  .footer-main {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .grid {
    grid-template-columns: 1fr;
  }
  .col-span-2, .col-span-3 { grid-column: 1; }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  .breadcrumb { font-size: var(--font-size-sm); }
  .section { padding: 2rem 0; }
  .card { padding: 1.25rem; }
  .back-to-top { bottom: 1rem; right: 1rem; width: 42px; height: 42px; }
}

/* ===== DESKTOP SIDENAV LAYOUT CORRECTION ===== */
@media (min-width: 1024px) {
  body {
    display: grid;
    grid-template-columns: var(--header-width-desktop) 1fr;
    grid-template-rows: 1fr auto;
  }
  .site-header {
    grid-column: 1;
    grid-row: 1 / -1;
    position: fixed;
    width: var(--header-width-desktop);
    height: 100vh;
  }
  #main-content {
    grid-column: 2;
    grid-row: 1;
    margin-left: 0;
    padding: 2rem 2.5rem;
    max-width: none;
    width: 100%;
  }
  .site-footer {
    grid-column: 2;
    grid-row: 2;
    margin-top: 0;
  }
  .footer-inner {
    padding: 2.5rem 2.5rem 1.5rem;
  }
  .nav-toggle { display: none; }
  .header-cta.btn { display: block; }
}