/* =========================================================
   FILE: css/navbar.css
   PURPOSE: Responsive header and navigation
========================================================= */

:root {
  --navbar-height: 72px;
  --navbar-bg: #050b10;
  --navbar-border: rgba(255, 255, 255, 0.08);
  --accent: #22d3c5;
  --text-primary: #f5f7f8;
  --text-muted: #b7c0c6;
  --container-width: 1440px;
  --transition: 180ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  padding-top: var(--navbar-height);
  font-family: "Inter", Arial, sans-serif;
  background: #071018;
  color: var(--text-primary);
}

img {
  max-width: 100%;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 2000;
  width: 100%;
  min-height: var(--navbar-height);
  background: rgba(5, 11, 16, 0.96);
  border-bottom: 1px solid var(--navbar-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.navbar-container {
  width: min(calc(100% - 48px), var(--container-width));
  min-height: var(--navbar-height);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  color: inherit;
  text-decoration: none;
}

.brand-logo {
  display: block;
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  object-fit: contain;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  line-height: 1;
}

.brand-name {
  color: var(--text-primary);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand-title {
  color: var(--accent);
  font-size: 0.56rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: var(--navbar-height);
}

.nav-link {
  position: relative;
  min-height: var(--navbar-height);
  display: inline-flex;
  align-items: center;
  color: var(--text-primary);
  font-size: 0.78rem;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 14px;
  height: 2px;
  background: var(--accent);
  border-radius: 999px;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition);
}

.nav-link:hover,
.nav-link:focus-visible,
.nav-link.active {
  color: #ffffff;
}

.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.nav-link:focus-visible,
.menu-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 9px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 4px auto;
  background: var(--text-primary);
  border-radius: 999px;
  transition: transform 200ms ease, opacity 200ms ease;
}

@media (max-width: 900px) {
  .navbar-container {
    width: min(calc(100% - 32px), var(--container-width));
  }

  .primary-nav {
    gap: 20px;
  }

  .nav-link {
    font-size: 0.74rem;
  }
}

@media (max-width: 720px) {
  :root {
    --navbar-height: 68px;
  }

  .navbar-container {
    width: min(calc(100% - 28px), var(--container-width));
  }

  .brand {
    gap: 9px;
  }

  .brand-logo {
    width: 38px;
    height: 38px;
  }

  .brand-name {
    font-size: 0.68rem;
  }

  .brand-title {
    font-size: 0.48rem;
    letter-spacing: 0.04em;
  }

  .menu-toggle {
    display: block;
    position: relative;
    z-index: 1002;
  }

  .primary-nav {
    position: fixed;
    z-index: 1999;
    top: var(--navbar-height);
    right: -100%;
    width: min(86%, 360px);
    height: calc(100vh - var(--navbar-height));
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    background: #071018;
    border-left: 1px solid var(--navbar-border);
    box-shadow: -14px 0 32px rgba(0, 0, 0, 0.28);
    transition: right 220ms ease;
  }

  .primary-nav.open {
    right: 0;
  }

  .nav-link {
    min-height: 52px;
    width: 100%;
    color: var(--text-muted);
    font-size: 0.95rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .nav-link::after {
    right: auto;
    bottom: 8px;
    width: 34px;
  }

  .menu-toggle.open span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .menu-toggle.open span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.open span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
}

@media (max-width: 480px) {
  .navbar-container {
    width: min(calc(100% - 22px), var(--container-width));
  }

  .brand-logo {
    width: 34px;
    height: 34px;
  }

  .brand-name {
    font-size: 0.62rem;
  }

  .brand-title {
    font-size: 0.43rem;
  }

  .primary-nav {
    width: 100%;
    border-left: 0;
  }
}

@media (min-width: 1600px) {
  :root {
    --navbar-height: 82px;
    --container-width: 1540px;
  }

  .brand-logo {
    width: 48px;
    height: 48px;
  }

  .brand-name {
    font-size: 0.88rem;
  }

  .brand-title {
    font-size: 0.62rem;
  }

  .primary-nav {
    gap: 34px;
  }

  .nav-link {
    font-size: 0.88rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}
html,body{width:100%;max-width:100%;overflow-x:hidden}
body.menu-open{overflow:hidden}
a,button{-webkit-tap-highlight-color:transparent}
@media(hover:none) and (pointer:coarse){a,button{min-height:44px}}
@media(max-width:720px){
body{padding-top:calc(var(--navbar-height) + env(safe-area-inset-top))}
.site-header{padding-top:env(safe-area-inset-top)}
.brand{min-width:0;max-width:calc(100% - 58px)}
.brand-copy{min-width:0}.brand-name,.brand-title{overflow:hidden;text-overflow:ellipsis}
.menu-toggle{min-width:44px;min-height:44px;touch-action:manipulation}
.primary-nav{top:calc(var(--navbar-height) + env(safe-area-inset-top));height:calc(100dvh - var(--navbar-height) - env(safe-area-inset-top));overflow-y:auto;overscroll-behavior:contain}
.nav-link{min-height:56px}}
@media(max-width:380px){.brand-title{display:none}}
@media(min-width:1920px){:root{--container-width:1680px}}