/* VARIABEL WARNA (Mudah diubah sesuai selera) */
:root {
  --bg: #0b0f19;
  --surface: #131a2a;
  --surface-hover: #1b243b;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --accent: #38bdf8;
  --accent-hover: #0ea5e9;
  --border: rgba(255, 255, 255, 0.08);
  --glow: rgba(56, 189, 248, 0.12);
}

/* Tema Terang (Light Mode) */
[data-theme="light"] {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-hover: #f1f5f9;
  --text: #0f172a;
  --text-muted: #475569;
  --accent: #0284c7;
  --accent-hover: #0369a1;
  --border: rgba(15, 23, 42, 0.1);
  --glow: rgba(2, 132, 199, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

/* EFEK CAHAYA KURSOR */
.cursor-glow {
  position: fixed;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--glow) 0%, transparent 70%);
  pointer-events: none;
  transform: translate(-50%, -50%);
  z-index: 0;
  transition: opacity 0.3s ease;
}

/* NAVBAR */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 15, 25, 0.75);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

[data-theme="light"] .navbar {
  background: rgba(248, 250, 252, 0.8);
}

.nav-content {
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.logo span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--accent);
}

.theme-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  width: 40px;
  height: 40px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 1.1rem;
  transition: transform 0.2s, background 0.2s;
}

.theme-btn:hover {
  transform: scale(1.08);
  background: var(--surface-hover);
}

/* HERO SECTION */
.hero {
  padding: 100px 24px 80px;
  position: relative;
  z-index: 1;
}

.badge {
  display: inline-block;
  padding: 6px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 99px;
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: 20px;
}

.highlight {
  color: var(--accent);
}

.hero-desc {
  max-width: 620px;
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* TOMBOL */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--accent);
  color: #0b0f19;
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 8px 20px rgba(56, 189, 248, 0.25);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--surface-hover);
}

/* SECTION UMUM */
.section {
  padding: 70px 24px;
  position: relative;
  z-index: 1;
}

.section-title {
  font-size: 1.75rem;
  margin-bottom: 28px;
}

/* TENTANG & SKILLS */
.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 32px;
  align-items: start;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 16px;
}

.skills-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 24px;
  border-radius: 16px;
}

.skills-card h3 {
  font-size: 1.05rem;
  margin-bottom: 16px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* FILTER & KARTU PROYEK */
.section-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.section-header .section-title {
  margin-bottom: 0;
}

.filter-buttons {
  display: flex;
  gap: 8px;
}

.filter-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s;
}

.filter-btn.active,
.filter-btn:hover {
  background: var(--accent);
  color: #0b0f19;
  border-color: var(--accent);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
}

.project-card.hide {
  display: none;
}

.card-thumb {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.thumb-1 { background: linear-gradient(135deg, #0ea5e9, #3b82f6); }
.thumb-2 { background: linear-gradient(135deg, #8b5cf6, #ec4899); }
.thumb-3 { background: linear-gradient(135deg, #10b981, #06b6d4); }

.card-body {
  padding: 22px;
}

.card-category {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  font-weight: 700;
}

.card-body h3 {
  margin: 8px 0 10px;
  font-size: 1.2rem;
}

.card-body p {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 16px;
}

.card-cta {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent);
}

/* KONTAK */
.contact-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 48px 32px;
  text-align: center;
}

.contact-box h2 {
  font-size: 1.6rem;
  margin-bottom: 12px;
}

.contact-box p {
  color: var(--text-muted);
  max-width: 540px;
  margin: 0 auto 28px;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.toast {
  display: inline-block;
  margin-top: 16px;
  font-size: 0.9rem;
  color: #10b981;
  font-weight: 600;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.toast.show {
  opacity: 1;
}

/* FOOTER */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* MODAL POP-UP */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  max-width: 500px;
  width: 100%;
  padding: 32px;
  position: relative;
  transform: scale(0.95);
  transition: transform 0.25s ease;
}

.modal-overlay.open .modal-box {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 18px;
  right: 20px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.8rem;
  cursor: pointer;
}

.modal-box h3 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.modal-box p {
  color: var(--text-muted);
  margin-bottom: 24px;
}

/* ANIMASI REVEAL SAAT SCROLL */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* RESPONSIF HP */
@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
}