/* ==========================================================================
   FAJAR NUGRAHA — LAYOUT ENGINE
   Lokasi: css/layout.css
   Fungsi: Struktur Navigasi, Header, Footer, & Tata Letak Dasar SPA
   ========================================================================== */

/* --- 1. GLOBAL WRAPPERS --- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 2rem;
  width: 100%;
}

/* Area Injeksi Konten SPA */
#render-konten {
  flex: 1;
  padding-top: calc(
    var(--header-height) + 20px
  ); /* Tambah ruang agar tidak tertutup navbar mengambang */
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  animation: fadeInSPA 0.4s ease-in-out;
}

@keyframes fadeInSPA {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- 2. HEADER ARCHITECTURE (GLASSMORPHISM & FLOATING) --- */
.header {
  position: fixed;
  top: 20px; /* Jarak dari atas untuk efek mengambang */
  left: 50%;
  transform: translateX(-50%); /* Sentralisasi header */
  width: 90%; /* Lebar tidak penuh agar mengambang */
  max-width: var(--container);
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-radius: 50px; /* Bentuk Kapsul/Radial */
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08); /* Bayangan lembut mengambang */
  border: 1px solid rgba(255, 255, 255, 0.1);
  z-index: var(--z-header);
  display: flex;
  align-items: center;
  transition: var(--transition);
  padding: 0 1rem;
}

.header.shrink {
  height: 70px;
  background: var(--bg-light);
  box-shadow: var(--shadow-md);
  top: 10px; /* Lebih mepet saat shrink */
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* --- 3. DESKTOP NAVIGATION --- */
.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  font-weight: 600; /* Sedikit lebih tipis */
  font-size: 0.95rem;
  color: var(--text-main);
  text-decoration: none !important;
  position: relative;
  padding: 0.5rem 0;
  transition: color 0.3s ease;
  white-space: nowrap;
  display: inline-block;
  text-align: center;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent) !important;
}

/* Garis bawah animasi dot (Bulat/Radial kecil) */
.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 4px;
  background: var(--accent);
  border-radius: 50%; /* Bulat */
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  transform: translateX(-50%);
}

.nav-links a.active::after {
  width: 4px; /* Titik kecil aktif */
}

/* --- 4. CONTROLS (RADIAL/PILL SHAPE ENGINE) --- */
.nav-controls {
  display: flex;
  align-items: center;
  gap: 0.8rem; /* Jarak rapat agar menyatu */
  padding-left: 1rem;
  border-left: none; /* Hilangkan garis batas */
}

/* Tombol Tema */
.theme-btn {
  background: var(--bg-main);
  border: 1px solid var(--border);
  color: var(--text-main);
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%; /* Bulat Sempurna */
  transition: all 0.3s ease;
}

.theme-btn:hover {
  background: var(--accent-soft);
  color: var(--accent);
  transform: rotate(15deg);
  border-color: var(--accent);
}

/* Tombol CTA (Pill Shape) */
.nav-cta {
  background-color: var(--primary) !important;
  color: white !important;
  padding: 0.6rem 1.6rem;
  border-radius: 50px; /* BENTUK KAPSUL */
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.3px;
  transition: all 0.3s ease;
  white-space: nowrap;
  box-shadow: 0 4px 10px rgba(30, 58, 138, 0.2);
}

.nav-cta:hover {
  background-color: var(--primary-light) !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(59, 130, 246, 0.3);
}

/* Search Box (Pill Shape) */
#search-form {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input {
  padding: 9px 38px 9px 18px;
  border: 1px solid var(--border);
  border-radius: 50px; /* BENTUK KAPSUL */
  background: var(--bg-main);
  font-size: 0.85rem;
  color: var(--text-main);
  width: 170px;
  transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

.search-input:focus {
  width: 230px;
  outline: none;
  background: var(--bg-light);
  border-color: var(--accent);
  box-shadow: 0 4px 15px var(--accent-soft);
}

.search-submit {
  position: absolute;
  right: 13px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  transition: color 0.3s;
}

.search-input:focus + .search-submit {
  color: var(--accent);
}

/* --- 5. MOBILE NAVIGATION ENGINE --- */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: var(--z-mobile-nav);
}

.nav-toggle span {
  width: 26px;
  height: 2px;
  background: var(--text-main);
  transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 2px;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: translateX(-15px);
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.7);
  backdrop-filter: blur(5px);
  opacity: 0;
  visibility: hidden;
  z-index: var(--z-overlay);
  transition: all 0.4s ease;
}

.nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

@media (max-width: 1024px) {
  .nav-toggle {
    display: flex;
  }
  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: var(--bg-light);
    flex-direction: column;
    padding: 90px 2rem;
    gap: 2rem;
    box-shadow: -15px 0 40px rgba(0, 0, 0, 0.1);
    transition: right 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 30px 0 0 30px;
  }
  .nav.active {
    right: 0;
  }

  .nav-links,
  .nav-controls {
    flex-direction: column;
    width: 100%;
    border: none;
    padding: 0;
    align-items: center;
  }
  .nav-links {
    gap: 1.2rem;
  }
  .nav-links a {
    font-size: 1.2rem;
  }
  .nav-controls {
    gap: 1.2rem;
  }
}

/* --- 6. FOOTER ENGINE --- */
.footer {
  background-color: var(--bg-light);
  border-top: 1px solid var(--border);
  padding: 4rem 0 2rem;
  margin-top: auto;
}