/**
 * ============================================================================
 * NAVBAR STYLES — FIKI ARDIANSYAH PERSONAL BRAND
 * ============================================================================
 * Desain: Fixed Glassmorphism Gelap Metalik (Charcoal/Obsidian)
 * Aksen: Precision Metallic Red & Hairline Borders
 * Aksesibilitas: Skip-to-content, keyboard focus ring, WCAG 2.1 AA compliant
 */

/* 1. Aksesibilitas: Skip Link ke Konten Utama */
.skip-link {
  position: fixed;
  top: -100px;
  left: var(--space-4, 1rem);
  z-index: calc(var(--z-navbar, 100) + 50);
  padding: var(--space-3, 0.75rem) var(--space-5, 1.25rem);
  background: var(--surface-elevated, #222733);
  color: var(--text-primary, #f5f6f8);
  font-family: var(--font-mono, monospace);
  font-size: var(--text-sm, 0.875rem);
  font-weight: var(--font-weight-medium, 500);
  border: 1px solid var(--red-hover, #ff3b4b);
  border-radius: var(--radius-md, 8px);
  box-shadow: var(--shadow-red-glow, 0 0 24px -2px rgba(230, 46, 61, 0.42));
  transition: top var(--transition-fast, 150ms);
  text-decoration: none;
}

.skip-link:focus {
  top: var(--space-4, 1rem);
  outline: none;
}

/* 2. Header Kontainer Melayang Glassmorphism */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  height: var(--navbar-height, 72px);
  z-index: var(--z-navbar, 100);
  background: var(--surface-backdrop, rgba(10, 11, 14, 0.85));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
  transition: background var(--transition-base, 250ms),
              border-color var(--transition-base, 250ms),
              box-shadow var(--transition-base, 250ms);
}

.site-header.is-scrolled {
  background: rgba(10, 11, 14, 0.94);
  border-bottom-color: var(--border-medium, rgba(255, 255, 255, 0.16));
  box-shadow: 0 8px 24px -4px rgba(0, 0, 0, 0.7);
}

/* 3. Bar Navigasi Inti */
.navbar {
  max-width: var(--max-width-wide, 1360px);
  margin: 0 auto;
  height: 100%;
  padding: 0 var(--space-6, 1.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6, 1.5rem);
}

/* 4. Brand Identitas: Wordmark & Monogram Vektor SVG */
.navbar-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3, 0.75rem);
  text-decoration: none;
  color: var(--text-primary, #f5f6f8);
  outline: none;
  user-select: none;
  transition: transform var(--transition-fast, 150ms);
}

.navbar-brand:hover {
  transform: translateY(-1px);
}

.navbar-brand:focus-visible {
  outline: 2px solid var(--red-hover, #ff3b4b);
  outline-offset: 4px;
  border-radius: var(--radius-sm, 4px);
}

.brand-monogram-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--surface-card, #151820);
  border: 1px solid var(--border-medium, rgba(255, 255, 255, 0.16));
  border-radius: var(--radius-md, 8px);
  color: var(--red-primary, #e62e3d);
  transition: border-color var(--transition-fast, 150ms),
              box-shadow var(--transition-fast, 150ms),
              color var(--transition-fast, 150ms);
}

.navbar-brand:hover .brand-monogram-wrapper {
  color: var(--red-hover, #ff3b4b);
  border-color: var(--red-badge-border, rgba(230, 46, 61, 0.32));
  box-shadow: 0 0 16px -2px var(--red-glow, rgba(230, 46, 61, 0.28));
}

.brand-monogram-svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
}

.brand-wordmark {
  font-family: var(--font-sans, sans-serif);
  font-size: var(--text-base, 1rem);
  font-weight: var(--font-weight-bold, 700);
  letter-spacing: 0.08em;
  color: var(--text-primary, #f5f6f8);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  text-transform: uppercase;
}

/* 5. Menu Navigasi Desktop */
.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1, 0.25rem);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: var(--space-2, 0.5rem) var(--space-4, 1rem);
  font-family: var(--font-sans, sans-serif);
  font-size: var(--text-sm, 0.875rem);
  font-weight: var(--font-weight-medium, 500);
  color: var(--text-secondary, #9da3b0);
  text-decoration: none;
  border-radius: var(--radius-md, 8px);
  letter-spacing: 0.02em;
  transition: color var(--transition-fast, 150ms),
              background var(--transition-fast, 150ms);
}

.nav-link:hover {
  color: var(--text-primary, #f5f6f8);
  background: rgba(255, 255, 255, 0.04);
}

/* Indikator Status Link Aktif */
.nav-link.active {
  color: var(--text-primary, #f5f6f8);
  font-weight: var(--font-weight-semibold, 600);
  background: rgba(255, 255, 255, 0.03);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-4, 1rem);
  right: var(--space-4, 1rem);
  height: 2px;
  background: var(--gradient-red-metallic, linear-gradient(135deg, #ff3a4a 0%, #d81e2d 50%, #94101b 100%));
  border-radius: var(--radius-pill, 9999px);
  box-shadow: 0 0 10px var(--red-glow, rgba(230, 46, 61, 0.28));
  opacity: 0;
  transform: scaleX(0.4);
  transition: opacity var(--transition-base, 250ms),
              transform var(--transition-base, 250ms);
}

.nav-link:hover::after {
  opacity: 0.5;
  transform: scaleX(0.7);
}

.nav-link.active::after {
  opacity: 1;
  transform: scaleX(1);
}

/* 6. Tombol Toggle Drawer Mobile (Hamburger) */
.nav-toggle-btn {
  display: none; /* Default tersembunyi pada layar lebar */
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: var(--surface-card, #151820);
  border: 1px solid var(--border-medium, rgba(255, 255, 255, 0.16));
  border-radius: var(--radius-md, 8px);
  color: var(--text-primary, #f5f6f8);
  cursor: pointer;
  transition: all var(--transition-fast, 150ms);
  outline: none;
}

.nav-toggle-btn:hover {
  border-color: var(--red-badge-border, rgba(230, 46, 61, 0.32));
  color: var(--red-hover, #ff3b4b);
  box-shadow: 0 0 14px -2px var(--red-glow, rgba(230, 46, 61, 0.28));
  background: var(--surface-card-hover, #1c202a);
}

.nav-toggle-btn:focus-visible {
  outline: 2px solid var(--red-hover, #ff3b4b);
  outline-offset: 3px;
}

.nav-toggle-icon {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  stroke-width: 2;
  transition: transform var(--transition-fast, 150ms);
}

/* 7. Responsivitas: Tampilan Mobile (< 768px) */
@media (max-width: 767.98px) {
  .navbar-nav {
    display: none; /* Sembunyikan navigasi desktop pada resolusi mobile */
  }

  .nav-toggle-btn {
    display: inline-flex; /* Tampilkan tombol toggle hamburger */
  }

  .navbar {
    padding: 0 var(--space-4, 1rem);
  }

  .brand-wordmark {
    font-size: var(--text-sm, 0.875rem);
    letter-spacing: 0.06em;
  }
}