/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.6;
  color: #FFFFFF;
  background: #051220;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; border: none; background: none; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }

:focus-visible { outline: 2px solid #39FF14; outline-offset: 3px; border-radius: 2px; }

/* ===== CSS VARIABLES ===== */
:root {
  --color-primary: #0A1F3F;
  --color-primary-dark: #051220;
  --color-primary-light: #1A2F4F;
  --color-accent: #39FF14;
  --color-secondary: #C0C0C0;
  --color-text-primary: #FFFFFF;
  --color-text-secondary: #AABBCC;
  --color-surface-dark: #0D1B2A;
  --color-surface-light: #1E3A5F;
  --color-bg-gradient-start: #051220;
  --color-bg-gradient-end: #0A1F3F;

  --font-heading: 'Montserrat', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --container-max: 1200px;
  --container-padding: 1.5rem;

  --transition-fast: 0.2s ease;
  --transition-base: 0.35s ease;
  --transition-slow: 0.55s ease;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --shadow-soft: 0 8px 24px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 20px rgba(57,255,20,0.15);

  --z-header: 1000;
  --z-progress: 1001;
  --z-nav-toggle: 1002;
  --z-nav: 999;
  --z-skip: 9999;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}

h1 { font-size: clamp(2.2rem, 6vw, 3.5rem); }
h2 { font-size: clamp(1.8rem, 4.5vw, 2.5rem); }
h3 { font-size: clamp(1.3rem, 3vw, 1.75rem); }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p, li, blockquote, figcaption {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

/* ===== CONTAINER ===== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* ===== SKIP LINK ===== */
.skip-link {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: var(--z-skip);
  background: var(--color-accent);
  color: var(--color-primary-dark);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  transition: top var(--transition-fast);
  text-decoration: none;
}
.skip-link:focus {
  top: 1rem;
}

/* ===== HEADER ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header);
  background: linear-gradient(180deg, rgba(5,18,32,0.92) 0%, rgba(10,31,63,0.88) 100%);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background var(--transition-base), box-shadow var(--transition-base);
  border-bottom: 1px solid rgba(57,255,20,0.06);
}

.site-header[data-scrolled="true"] {
  background: linear-gradient(180deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  box-shadow: 0 4px 30px rgba(0,0,0,0.5), var(--shadow-glow);
  border-bottom-color: rgba(57,255,20,0.12);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
  min-height: 68px;
}

.header-logo {
  display: flex;
  align-items: baseline;
  gap: 0.15rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.6rem;
  letter-spacing: -0.03em;
  transition: opacity var(--transition-fast);
  position: relative;
  z-index: var(--z-nav-toggle);
}
.header-logo:hover { opacity: 0.85; }

.logo-mark {
  color: var(--color-accent);
  text-shadow: 0 0 12px rgba(57,255,20,0.25);
}

.logo-text {
  color: var(--color-text-primary);
}

/* ===== NAVIGATION ===== */
.header-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  display: inline-block;
  padding: 0.5rem 1rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 1rem;
  right: 1rem;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-base);
  box-shadow: 0 0 8px rgba(57,255,20,0.3);
}
.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-accent);
  background: rgba(57,255,20,0.06);
}
.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
}
.nav-link[aria-current="page"] {
  color: var(--color-accent);
  background: rgba(57,255,20,0.08);
}
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  box-shadow: 0 0 12px rgba(57,255,20,0.4);
}

/* ===== NAV TOGGLE (mobile) ===== */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 5px;
  position: relative;
  z-index: var(--z-nav-toggle);
  background: rgba(57,255,20,0.08);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(57,255,20,0.15);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}
.nav-toggle:hover {
  background: rgba(57,255,20,0.15);
  border-color: var(--color-accent);
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}
.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);
}

/* ===== HEADER PROGRESS BAR ===== */
.header-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), #7AFF5A, var(--color-accent));
  box-shadow: 0 0 12px rgba(57,255,20,0.4);
  transition: width 0.1s linear;
  z-index: var(--z-progress);
}

/* ===== MOBILE NAV ===== */
@media (max-width: 767px) {
  .nav-toggle {
    display: flex;
  }

  .header-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 360px;
    height: 100vh;
    height: 100dvh;
    background: linear-gradient(180deg, var(--color-primary-dark) 0%, var(--color-primary-light) 100%);
    border-left: 1px solid rgba(57,255,20,0.12);
    box-shadow: -8px 0 40px rgba(0,0,0,0.6);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 5rem 2rem 2rem;
    transition: right var(--transition-base);
    z-index: var(--z-nav);
    overflow-y: auto;
  }
  .header-nav[data-open="true"] {
    right: 0;
  }

  .nav-list {
    flex-direction: column;
    gap: 0.15rem;
    width: 100%;
  }

  .nav-link {
    display: block;
    padding: 0.9rem 1rem;
    font-size: 1rem;
    width: 100%;
    border-bottom: 1px solid rgba(192,192,192,0.06);
  }
  .nav-link::after { display: none; }
  .nav-link:hover,
  .nav-link[aria-current="page"] {
    background: rgba(57,255,20,0.08);
    border-bottom-color: rgba(57,255,20,0.2);
  }
}

/* ===== HEADER OVERLAY (mobile) ===== */
@media (max-width: 767px) {
  body.nav-open::after {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(5,18,32,0.6);
    z-index: 998;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    animation: fadeInOverlay 0.3s ease;
  }
}
@keyframes fadeInOverlay {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ===== FOOTER ===== */
.site-footer {
  background: linear-gradient(180deg, var(--color-primary-dark) 0%, #030C18 100%);
  border-top: 1px solid rgba(57,255,20,0.08);
  padding: 3.5rem 0 2rem;
  margin-top: 4rem;
  position: relative;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(57,255,20,0.2), var(--color-accent), rgba(57,255,20,0.2), transparent);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.2fr;
  gap: 2.5rem;
}

.footer-logo {
  display: inline-flex;
  align-items: baseline;
  gap: 0.15rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  transition: opacity var(--transition-fast);
}
.footer-logo:hover { opacity: 0.85; }

.footer-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.75rem;
  max-width: 36em;
  line-height: 1.7;
}

.footer-trust {
  font-size: 0.8rem;
  color: rgba(170,187,204,0.6);
  line-height: 1.6;
  padding: 0.75rem 1rem;
  background: rgba(5,18,32,0.5);
  border-radius: var(--radius-sm);
  border-left: 2px solid rgba(57,255,20,0.15);
}

.footer-heading {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(57,255,20,0.1);
}

.footer-contact-list li,
.footer-legal-list li {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.65rem;
  line-height: 1.5;
}

.footer-contact-list a,
.footer-legal-list a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}
.footer-contact-list a:hover,
.footer-legal-list a:hover {
  color: var(--color-accent);
}

.footer-legal-list a {
  display: inline-block;
  padding: 0.15rem 0;
  position: relative;
}
.footer-legal-list a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}
.footer-legal-list a:hover::after {
  width: 100%;
}

.footer-icp {
  margin-top: 1.25rem;
  font-size: 0.8rem;
  color: rgba(170,187,204,0.5);
}
.footer-icp a {
  color: rgba(170,187,204,0.6);
  transition: color var(--transition-fast);
}
.footer-icp a:hover {
  color: var(--color-accent);
}

.footer-copy {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: rgba(170,187,204,0.35);
  letter-spacing: 0.02em;
}

/* ===== FOOTER RESPONSIVE ===== */
@media (max-width: 767px) {
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .site-footer {
    padding: 2.5rem 0 1.5rem;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
  .footer-brand { grid-column: 1 / -1; }
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-primary-dark);
  border-color: var(--color-accent);
  box-shadow: 0 0 20px rgba(57,255,20,0.15);
}
.btn--primary:hover {
  background: transparent;
  color: var(--color-accent);
  box-shadow: 0 0 30px rgba(57,255,20,0.25), inset 0 0 20px rgba(57,255,20,0.05);
}

.btn--outline {
  background: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-secondary);
}
.btn--outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  box-shadow: 0 0 20px rgba(57,255,20,0.1);
}

.btn--small {
  font-size: 0.75rem;
  padding: 0.5rem 1.25rem;
}

/* ===== SECTION NUMBER ===== */
.section-number {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(3rem, 8vw, 5.5rem);
  line-height: 1;
  letter-spacing: -0.05em;
  color: var(--color-accent);
  opacity: 0.15;
  user-select: none;
  display: block;
}

/* ===== GRID ===== */
.grid {
  display: grid;
  gap: 1.5rem;
}
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 767px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
}
@media (min-width: 768px) and (max-width: 1023px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

/* ===== CARD ===== */
.card {
  background: linear-gradient(145deg, var(--color-surface-dark), var(--color-primary-light));
  border-radius: var(--radius-md);
  padding: 1.5rem;
  border: 1px solid rgba(57,255,20,0.06);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-accent));
  opacity: 0;
  transition: opacity var(--transition-base);
}
.card:hover {
  border-color: rgba(57,255,20,0.2);
  box-shadow: var(--shadow-soft), 0 0 30px rgba(57,255,20,0.03);
  transform: translateY(-2px);
}
.card:hover::before {
  opacity: 1;
}

.card-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
  color: var(--color-text-primary);
}

.card-text {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* ===== TAG ===== */
.tag {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.25rem 0.65rem;
  background: rgba(192,192,192,0.08);
  color: var(--color-accent);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(57,255,20,0.1);
}

/* ===== FADE IN (scroll reveal) ===== */
[data-observe] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-observe].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== BREADCRUMB ===== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  padding: 0.75rem 0;
}
.breadcrumb a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}
.breadcrumb a:hover {
  color: var(--color-accent);
}
.breadcrumb-sep {
  color: rgba(170,187,204,0.3);
  user-select: none;
}
.breadcrumb-current {
  color: var(--color-accent);
  font-weight: 600;
}

/* ===== UTILITY ===== */
.text-accent { color: var(--color-accent); }
.text-secondary { color: var(--color-text-secondary); }
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.p-1 { padding: 1rem; }
.p-2 { padding: 2rem; }

/* ===== RESPONSIVE ===== */
@media (max-width: 767px) {
  :root { --container-padding: 1rem; }
  .header-inner { min-height: 60px; padding-top: 0.5rem; padding-bottom: 0.5rem; }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .nav-link { font-size: 0.78rem; padding: 0.4rem 0.7rem; }
}

/* ===== 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;
  }
  html { scroll-behavior: auto; }
  .site-header { transition: none; }
  .header-nav { transition: none; }
  [data-observe] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .card { transition: none; }
  .card:hover { transform: none; }
  .nav-link::after { transition: none; }
  .header-progress { transition: none; }
}

/* ===== PRINT ===== */
@media print {
  .site-header { position: relative; background: #fff; color: #000; }
  .site-header[data-scrolled="true"] { background: #fff; }
  .header-progress { display: none; }
  .nav-toggle { display: none; }
  .nav-link { color: #000; }
  .nav-link[aria-current="page"] { color: #000; background: none; }
  .site-footer { background: #f5f5f5; color: #000; }
  .btn { display: none; }
  .footer-icp a { color: #000; }
}

/* ===== IMAGE CONTAINER (responsive placeholder) ===== */
.img-container {
  position: relative;
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--color-surface-dark);
}
.img-container::before {
  content: '';
  display: block;
  padding-bottom: 56.25%; /* 16:9 */
}
.img-container img,
.img-container .img-placeholder {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-container--portrait::before { padding-bottom: 125%; }
.img-container--square::before { padding-bottom: 100%; }
.img-container--wide::before { padding-bottom: 40%; }