/* 010Academy shared theme — variables & header components */
:root {
  --primary: #1f6feb;
  --primary-dark: #0969da;
  --primary-light: #58a6ff;
  --secondary: #238636;
  --secondary-light: #2ea043;
  --accent: #8957e5;
  --accent-light: #a5a5ff;
  --danger: #da3633;
  --success: #238636;
  --warning: #d29922;
  --pixel-bg: #0d1117;
  --pixel-bg-secondary: #161b22;
  --pixel-dark: #161b22;
  --pixel-border: #30363d;
  --pixel-text: #c9d1d9;
  --pixel-text-bright: #f0f6fc;
  --pixel-light: #8b949e;
  --pixel-shadow: 4px 4px 0px rgba(0, 0, 0, 0.4);
  --pixel-radius-sm: 2px;
}

/* Shared scrollbar — wider hit area for easy click/drag */
html {
  scrollbar-width: auto;
  scrollbar-color: #1f6feb #0d1117;
  scroll-behavior: smooth;
}
html::-webkit-scrollbar,
body::-webkit-scrollbar {
  width: 18px;
  height: 18px;
}
html::-webkit-scrollbar-track,
body::-webkit-scrollbar-track {
  background: linear-gradient(90deg, #0d1117 0%, #161b22 100%);
  border-left: 1px solid #30363d;
}
html::-webkit-scrollbar-thumb,
body::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #58a6ff 0%, #1f6feb 45%, #8957e5 100%);
  border-radius: 10px;
  border: 3px solid #0d1117;
  box-shadow: 0 0 10px rgba(31, 111, 235, 0.35);
  min-height: 56px;
}
html::-webkit-scrollbar-thumb:hover,
body::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #79b8ff 0%, #388bfd 40%, #a371f7 100%);
  box-shadow: 0 0 14px rgba(88, 166, 255, 0.55);
}
html::-webkit-scrollbar-corner,
body::-webkit-scrollbar-corner {
  background: #0d1117;
}

.app-header {
  background: rgba(13, 17, 23, 0.95);
  border-bottom: 3px solid var(--primary);
  position: relative;
  z-index: 100;
  box-shadow: var(--pixel-shadow);
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

/* Base logo layout only — pages may override colors/gradient */
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: 'Press Start 2P', cursive;
  font-size: 0.85rem;
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border: 2px solid var(--pixel-text-bright);
  border-radius: var(--pixel-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  color: var(--pixel-text-bright);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.nav-links .lang-form {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-links .lang-label {
  color: var(--accent);
  font-family: 'Exo 2', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
}

.nav-links .lang-select {
  padding: 0.5rem 1rem;
  border: 2px solid var(--pixel-border);
  border-radius: var(--pixel-radius-sm);
  background: var(--pixel-dark);
  color: var(--pixel-text);
  font-family: 'Exo 2', sans-serif;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.2s;
}

.nav-links .lang-select:hover,
.nav-links .lang-select:focus {
  border-color: var(--primary);
  outline: none;
}

.nav-user {
  color: var(--accent);
  font-family: 'Exo 2', sans-serif;
  font-size: 0.9rem;
}

.nav-toggle {
  display: none;
  background: var(--pixel-dark);
  border: 2px solid var(--pixel-border);
  color: var(--pixel-text);
  padding: 0.5rem 1rem;
  font-family: 'Press Start 2P', cursive;
  font-size: 0.55rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(13, 17, 23, 0.98);
    border-bottom: 2px solid var(--primary);
    padding: 1rem 2rem;
    flex-direction: column;
    align-items: stretch;
  }

  .nav-links.open {
    display: flex;
  }

  .header-content {
    flex-wrap: wrap;
    padding: 0.75rem 1rem;
  }
}