:root {
  /* Dark Theme Variables (Default) */
  --bg: #050508;
  --surface: #0f0f1a;
  --surface-hover: #16162a;
  --primary: #00d4ff;
  --secondary: #0055ff;
  --text-main: #ffffff;
  --text-dim: #94a3b8;
  --border: rgba(255, 255, 255, 0.06);
  --danger: #ff4757;
  --success: #00d4a0;

  --nav-bg: rgba(5, 5, 8, 0.85);
  --card-bg: #0a0a12;
  --card-img-bg: #161625;
  --input-bg: #050508;
  --btn-text: #000;
  --box-shadow: rgba(0, 0, 0, 0.5);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-hover: #f1f5f9;
  --primary: #0284c7; /* Warna biru yang lebih pas untuk light mode */
  --secondary: #2563eb;
  --text-main: #0f172a;
  --text-dim: #475569;
  --border: rgba(0, 0, 0, 0.1);

  --nav-bg: rgba(248, 250, 252, 0.85);
  --card-bg: #ffffff;
  --card-img-bg: #e2e8f0;
  --input-bg: #ffffff;
  --btn-text: #ffffff;
  --box-shadow: rgba(0, 0, 0, 0.08);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  /* Memastikan saat klik menu navbar, tampilannya pas di tengah/tidak tertutup navbar */
  scroll-padding-top: 120px;
}

body {
  background-color: var(--bg);
  color: var(--text-main);
  font-family: "Plus Jakarta Sans", sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
  transition:
    background-color 0.3s,
    color 0.3s;
  padding-top: 80px; /* Menambahkan padding supaya konten tidak tertutup fixed navbar */
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 5%;
  width: 100%;
}

/* Navigation - Floating & Sticky */
.sticky-nav {
  position: fixed; /* Mengubah jadi fixed supaya bisa 100% full width */
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 5%; /* Padding fleksibel mengikuti layar */
  transition: all 0.3s ease;
}

.logo {
  font-weight: 800;
  font-size: 1.6rem;
  letter-spacing: -1px;
}
.logo span {
  color: var(--primary);
}

/* Wrapper untuk bagian kanan navbar */
.nav-right {
  display: flex;
  align-items: center;
  gap: 30px; /* Jarak antara menu dan icon tema */
}

.nav-links {
  display: flex;
  gap: 25px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-dim);
  font-weight: 500;
  font-size: 0.9rem;
  transition: 0.3s;
}
.nav-links a:hover {
  color: var(--primary);
}

/* Controls Wrapper (Theme & Hamburger) */
.nav-controls {
  display: flex;
  align-items: center;
  gap: 15px;
}

/* Theme Toggle Button */
.theme-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 1.1rem;
  cursor: pointer;
  transition: 0.3s;
  padding: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.theme-btn:hover {
  color: var(--primary);
  transform: scale(1.1);
}

/* Hamburger Menu Button */
.hamburger-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 1.4rem;
  cursor: pointer;
  transition: 0.3s;
}
.hamburger-btn:hover {
  color: var(--primary);
}

/* Hero Section */
.hero {
  padding: 40px 0 100px;
  text-align: center;
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-content {
  width: 100%;
}
.hero-tagline {
  color: var(--primary);
  font-weight: 700;
  letter-spacing: 3px;
  font-size: 0.8rem;
  margin-bottom: 20px;
  text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(2rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 25px;
}
.hero h1 span {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-desc {
  color: var(--text-dim);
  max-width: 700px;
  margin: 0 auto 40px;
  font-size: 1.1rem;
}
.hero-btns {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--primary);
  color: var(--btn-text);
  border: none;
  padding: 16px 32px;
  border-radius: 50px;
  font-weight: 800;
  text-decoration: none;
  transition: 0.3s;
  display: inline-block;
  text-align: center;
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 212, 255, 0.3);
}
.btn-secondary {
  color: var(--text-main);
  text-decoration: underline;
  font-weight: 600;
  padding: 16px 32px;
  text-align: center;
  display: inline-block;
}

/* Section Headline */
.section-headline {
  margin-bottom: 40px;
  margin-top: 80px;
}
.meta-info {
  font-family: "Space Mono", monospace;
  font-size: 0.8rem;
  color: var(--text-dim);
  display: block;
  margin-bottom: 10px;
}
.section-headline h2 {
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: minmax(280px, 350px) 1fr;
  gap: 50px;
  align-items: center;
}
.photo-wrapper {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 32px;
  aspect-ratio: 1;
  overflow: hidden;
  width: 100%;
  max-width: 350px;
  margin: 0 auto;
}
.photo-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.about-content p {
  color: var(--text-dim);
  font-size: 1.05rem;
  margin-bottom: 20px;
}

/* Stats Mini */
.stats-mini {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: 15px;
  margin-top: 30px;
  border-top: none;
  padding-top: 0;
}
.stat-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 25px 10px;
  text-align: center;
  transition: 0.3s;
}
.stat-item:hover {
  border-color: var(--primary);
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(0, 212, 255, 0.05);
}
.stat-item h3 {
  font-size: 2.2rem;
  color: var(--primary);
  margin-bottom: 8px;
  font-weight: 800;
}
.stat-item p {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  margin: 0;
  letter-spacing: 1px;
}

/* Skills & Services */
.skills-grid,
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.skill-category,
.service-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 30px;
  border-radius: 24px;
  transition: 0.3s;
}
.skill-category:hover,
.service-card:hover {
  border-color: var(--primary);
  background: var(--surface-hover);
  transform: translateY(-5px);
}
.skill-category h3 {
  margin-bottom: 20px;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.2rem;
}
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.skill-tags span {
  background: rgba(128, 128, 128, 0.05);
  padding: 8px 14px;
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
}
.service-icon {
  font-size: 1.8rem;
  color: var(--primary);
  margin-bottom: 15px;
}
.service-card h3 {
  margin-bottom: 10px;
  font-size: 1.2rem;
}
.service-card p {
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* Experience Timeline */
.experience-section {
  position: relative;
  padding-left: 10px;
}
.timeline {
  border-left: 2px solid var(--border);
  padding-left: 25px;
  display: grid;
  gap: 30px;
}
.timeline-item {
  position: relative;
}
.timeline-dot {
  width: 12px;
  height: 12px;
  background: var(--primary);
  border-radius: 50%;
  position: absolute;
  left: -32px;
  top: 6px;
  box-shadow: 0 0 10px var(--primary);
}
.time {
  font-family: "Space Mono", monospace;
  color: var(--primary);
  font-size: 0.85rem;
  margin-bottom: 5px;
  display: block;
}
.timeline-content h3 {
  font-size: 1.2rem;
}
.company {
  color: var(--text-main);
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 0.95rem;
}
.timeline-content p {
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* Portfolio Filter & Grid */
.filter-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 30px;
  flex-wrap: wrap; /* Di desktop tetep wrap ya */
}

.tab-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 10px 24px;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  transition: 0.3s;
}
.tab-btn.active {
  background: var(--primary);
  color: var(--btn-text);
  border-color: var(--primary);
  box-shadow: 0 5px 15px rgba(0, 212, 255, 0.2);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.item-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  display: flex;
  flex-direction: column;
  min-height: 420px;
}
.item-card:hover {
  transform: translateY(-10px);
  border-color: var(--primary);
  box-shadow: 0 15px 35px rgba(0, 212, 255, 0.15);
}
.item-card.hidden {
  display: none;
}

.card-img {
  height: 220px;
  background: var(--card-img-bg);
  width: 100%;
  border-bottom: 1px solid var(--border);
}

.card-content {
  padding: 25px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.tag-badge {
  background: rgba(128, 128, 128, 0.08);
  color: var(--text-dim);
  padding: 5px 14px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.card-content h3 {
  font-size: 1.4rem;
  margin-bottom: 10px;
  color: var(--primary);
}
.card-content p {
  color: var(--text-dim);
  font-size: 0.95rem;
  margin-bottom: auto;
  line-height: 1.5;
}

.card-btns {
  margin-top: 25px;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  align-items: center;
}
.link-live {
  color: var(--primary) !important;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: 0.3s;
}
.link-source {
  color: var(--text-dim) !important;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: 0.3s;
}
.link-live:hover,
.link-source:hover {
  opacity: 0.7;
  transform: translateY(-2px);
}

/* Contact Section */
.contact-box {
  background: var(--surface);
  margin: 80px 0;
  padding: 40px;
  border-radius: 32px;
  border: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
}
.contact-info h2 {
  font-size: clamp(2rem, 5vw, 2.5rem);
  margin-bottom: 15px;
}
.contact-info span {
  color: var(--primary);
}
.contact-info p {
  color: var(--text-dim);
  font-size: 0.95rem;
}
.social-links {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-top: 30px;
}
.social-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 1rem;
  transition: 0.3s;
  display: flex;
  align-items: center;
  gap: 12px;
}
.social-links a:hover {
  color: var(--primary);
  transform: translateX(5px);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: 100%;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: left;
}
.form-group label {
  color: var(--text-dim);
  font-size: 0.9rem;
  font-weight: 500;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  resize: none;
  transition: 0.3s;
}
.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.2);
}
.btn-send {
  background: var(--primary);
  color: var(--btn-text);
  border: none;
  padding: 14px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: 0.3s;
  width: 100%;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 10px;
}
.btn-send:hover {
  transform: translateY(-2px);
  opacity: 0.9;
}

footer {
  text-align: center;
  padding: 40px 0;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* Loading state */
.loading-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 40px;
  color: var(--text-dim);
}
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Tombol Ke Atas (Back to Top) - Digeser ke Kanan Bawah */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--primary);
  color: var(--btn-text);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
}
.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 212, 255, 0.4);
}

/* Mobile Optimization Breakpoints */
@media (max-width: 992px) {
  .about-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .photo-wrapper {
    margin: 0 auto;
    width: 100%;
    max-width: 280px;
  }
  .stats-mini {
    justify-content: center;
    text-align: center;
  }
  .contact-box {
    grid-template-columns: 1fr;
    padding: 40px 30px;
    gap: 30px;
  }

  /* Membuat teks About Me rata tengah di mobile */
  #about.section-headline {
    text-align: center;
  }
}

@media (max-width: 768px) {
  .nav-right {
    gap: 15px;
  } /* Jarak dikecilkan saat di mobile */

  /* Hamburger Menu untuk Mobile */
  .hamburger-btn {
    display: block;
  }
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 10px;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--nav-bg);
    padding: 20px 5%;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 10px 30px var(--box-shadow);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }
  .nav-links.active {
    display: flex;
  }
  .nav-links a {
    font-size: 1rem;
    padding: 10px 0;
    width: 100%;
    text-align: center; /* Diubah jadi center sesuai request sayang */
  }
  .nav-links a:last-child {
    border-bottom: none;
  }
  .hero {
    padding: 20px 0 80px;
  }
  .hero-btns {
    flex-direction: column;
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
  }
  .btn-primary,
  .btn-secondary {
    width: 100%;
    padding: 14px 20px;
  }
  .contact-box {
    padding: 30px 20px;
  }
  .portfolio-grid {
    grid-template-columns: 1fr;
  }
  .back-to-top {
    right: 20px;
    bottom: 20px;
    width: 45px;
    height: 45px;
  }

  /* Settingan spesifik GRID tab filter buat mobile aja */
  .filter-tabs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px; /* Dikasih jarak dikit biar muat */
    width: 100%;
  }
  .tab-btn {
    width: 100%;
    padding: 10px 5px;
    font-size: 0.8rem; /* Font dikecilin dikit biar Certificates muat rapi */
    text-align: center;
    white-space: nowrap;
  }
}

@media (max-width: 600px) {
  .skills-grid,
  .services-grid {
    grid-template-columns: 1fr;
  }
  .container {
    padding: 0 6%;
  }
  .section-headline h2 {
    font-size: 1.8rem;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
}