/* =========================================
   1. Variabel CSS & Tema
   ========================================= */
:root {
    /* Light Mode */
    --primary-color: #ccff00;
    --primary-glow: rgba(204, 255, 0, 0.4);
    --bg-color: #f8f9fa;
    --surface-color: #ffffff; /* Menggantikan --card-bg agar lebih universal */
    --text-main: #212529;
    --text-muted: #6c757d;
    --text-on-primary: #000000;
    --border-color: rgba(0, 0, 0, 0.08);
    
    /* Placeholder Gradient */
    --placeholder-dark-1: #222222;
    --placeholder-dark-2: #444444;
}

[data-theme="dark"] {
    /* Dark Mode */
    --primary-color: #dfff00;
    --primary-glow: rgba(223, 255, 0, 0.3);
    --bg-color: #121212;
    --surface-color: #1e1e1e;
    --text-main: #f8f9fa;
    --text-muted: #adb5bd;
    --border-color: rgba(255, 255, 255, 0.08);
}

/* =========================================
   2. Reset & Konfigurasi Dasar
   ========================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth; /* Efek scroll halus untuk navigasi */
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    transition: background-color 0.4s ease, color 0.4s ease;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* =========================================
   3. Tipografi & Utilitas
   ========================================= */
h1, h2, h3 {
    line-height: 1.2;
    font-weight: 700;
    color: var(--text-main);
}

/* .highlight {
    color: var(--text-main);
    background: linear-gradient(120deg, var(--primary-color) 0%, var(--primary-color) 100%);
    background-repeat: no-repeat;
    background-size: 100% 30%;
    background-position: 0 88%;
} */

.subtitle {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

/* =========================================
   4. Komponen (Tombol, Badge, Header)
   ========================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--text-on-primary);
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px var(--primary-glow); /* Efek Profesional: Neon Glow */
}

.btn-outline {
    background-color: transparent;
    color: var(--text-main);
    border: 2px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--text-main);
    transform: translateY(-3px);
}

.section-header {
    margin-bottom: 48px;
    text-align: center;
}

.section-header h2 {
    font-size: 2.2rem;
    margin-bottom: 16px;
}

.divider {
    height: 4px;
    width: 60px;
    background-color: var(--primary-color);
    margin: 0 auto;
    border-radius: 2px;
}

/* =========================================
   5. Layout (Navbar, Hero, dll)
   ========================================= */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(var(--bg-color), 0.8);
    backdrop-filter: blur(10px); /* Efek profesional: Glassmorphism */
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--text-main);
}

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

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.btn-icon {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

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

/* Hero Section */
.hero {
    padding: 120px 24px;
    text-align: center;
    max-width: 800px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero .description {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* Skills Section */
.skills-section {
    padding: 80px 24px;
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
}

.skill-badge {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 12px 24px;
    border-radius: 50px;
    font-weight: 500;
    color: var(--text-main);
    transition: all 0.3s ease;
}

.skill-badge:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px var(--primary-glow);
    transform: translateY(-2px);
}

/* Projects Section */
.projects-section {
    padding: 80px 24px 120px;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.project-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.card-img {
    height: 240px;
    width: 100%;
    background: linear-gradient(135deg, var(--placeholder-dark-1), var(--placeholder-dark-2));
}

.card-body {
    padding: 32px;
}

.project-category {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
    display: inline-block;
}

.project-card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

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

.project-link {
    text-decoration: none;
    font-weight: 600;
    color: var(--text-main);
    display: inline-flex;
    align-items: center;
    transition: color 0.3s ease;
}

.project-link:hover {
    color: var(--primary-color);
}

/* Footer */
footer {
    text-align: center;
    padding: 32px 24px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* =========================================
   6. Animasi JavaScript (Reveal)
   ========================================= */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

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

/* =========================================
   7. Responsivitas (Media Queries)
   ========================================= */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .hero-actions { flex-direction: column; }
    .nav-links { display: none; /* Sembunyikan menu di mobile, bisa ditambah hamburger menu nanti */ }
}