:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --card-bg: #ffffff;
  --border-color: #e5e7eb;
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --card-bg: #1e293b;
  --border-color: #334155;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%; /* Lebar awal 0 */
  height: 4px; /* Ketebalan garis */
  background: var(--accent); /* Mengikuti warna utama Anda */
  z-index: 9999;
  border-radius: 0 2px 2px 0;
}

/* 2. Efek Navigasi saat di-scroll */
nav {
  transition:
    padding 0.3s ease,
    box-shadow 0.3s ease; /* Transisi halus */
}

nav.scrolled {
  padding: 0.8rem 5%; /* Mengecil sedikit dari ukuran awal 1.2rem */
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1); /* Tambahan bayangan */
}

[data-theme="dark"] nav.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5); /* Bayangan lebih gelap untuk mode malam */
}

/* =========================================
   RESPONSIF UNTUK HP (MOBILE VIEW)
   ========================================= */

.hamburger {
  display: none; /* Sembunyikan ikon di layar laptop */
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-primary);
}

@media (max-width: 768px) {
  /* Mencegah teks logo turun ke bawah */
  .logo {
    font-size: 1.2rem;
    white-space: nowrap;
  }

  /* Tampilkan ikon hamburger */
  .hamburger {
    display: block;
  }

  /* Sembunyikan menu dan ubah susunannya menjadi vertikal */
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    flex-direction: column;
    text-align: center;
    padding: 1rem 0;
    gap: 1.5rem;
    display: none; /* Sembunyikan default di HP */
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 10px 10px rgba(0, 0, 0, 0.1);
  }

  /* Class ini akan ditambahkan oleh JavaScript saat hamburger diklik */
  .nav-links.active {
    display: flex;
  }

  /* Penyesuaian tombol tema di HP */
  #theme-toggle {
    margin-left: auto;
    margin-right: 15px;
  }
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Inter", sans-serif;
}
html {
  scroll-behavior: smooth;
}
body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition:
    background-color 0.3s,
    color 0.3s;
  line-height: 1.6;
}

/* Navigasi */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 5%;
  background-color: rgba(var(--bg-primary), 0.9);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
}
.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  font-family: monospace;
}
nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}
nav a {
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: 0.3s;
}
nav a:hover {
  color: var(--accent);
}
#theme-toggle {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.5rem 0.8rem;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.3s;
}
#theme-toggle:hover {
  background: var(--bg-secondary);
}

/* Header */
header {
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 20px;
}
.header-content {
  max-width: 800px;
}
.subtitle {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
header h1 {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}
.description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}
.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}
.btn {
  padding: 0.8rem 1.8rem;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  transition: 0.3s;
}
.btn-primary {
  background: var(--accent);
  color: white;
  border: 2px solid var(--accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}
.btn-outline:hover {
  border-color: var(--text-primary);
  transform: translateY(-2px);
}

/* Sections Global */
section {
  padding: 6rem 5%;
  max-width: 1200px;
  margin: 0 auto;
}
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}
.section-header h2 {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
}
.line {
  height: 4px;
  width: 60px;
  background: var(--accent);
  margin: 0 auto;
  border-radius: 2px;
}

/* About & Skills */
.about-text {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.1rem;
  color: var(--text-secondary);
}
.skills-container {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  max-width: 800px;
  margin: 0 auto;
}
.skill-badge {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 0.6rem 1.2rem;
  border-radius: 30px;
  font-size: 0.95rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: 0.3s;
}
.skill-badge:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-3px);
}

/* Portfolio Grid */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}
.card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 2.5rem;
  border-radius: 12px;
  transition: 0.3s;
  display: flex;
  flex-direction: column;
}
.card:hover {
  transform: translateY(-10px);
  border-color: var(--accent);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.1);
}
.card-icon {
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
}
.card h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
}
.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  flex-grow: 1;
  margin-bottom: 1.5rem;
}
.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.tech-stack span {
  font-size: 0.8rem;
  font-family: monospace;
  background: var(--bg-secondary);
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  color: var(--accent);
}

/* Footer */
footer {
  text-align: center;
  padding: 4rem 5%;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}
footer h2 {
  margin-bottom: 1rem;
}
footer p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
}
.email-text {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2rem;
}
.social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
}
.social-links a {
  font-size: 1.5rem;
  color: var(--text-secondary);
  transition: 0.3s;
}
.social-links a:hover {
  color: var(--accent);
  transform: scale(1.2);
}
.copyright {
  font-size: 0.9rem;
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
}

/* Animasi Scroll */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.8s ease-out,
    transform 0.8s ease-out;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}