/* General Styling */
:root {
    --primary-color: #0056b3;
    --secondary-color: #f4f4f4;
    --dark-color: #333;
    --light-color: #fff;
    --text-color: #555;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    background-color: var(--secondary-color);
    color: var(--text-color);
}

.container {
    max-width: 1100px;
    margin: auto;
    padding: 0 20px;
}

h1, h2, h3 {
    color: var(--dark-color);
}

h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2rem;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
    display: inline-block;
}

section {
    padding: 60px 0;
    text-align: center;
}

/* Header & Navbar */
header {
    background: var(--light-color);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    width: 100%;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    padding-bottom: 15px;
}

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

header ul {
    list-style: none;
    display: flex;
}

header ul li a {
    text-decoration: none;
    color: var(--dark-color);
    padding: 5px 15px;
    font-weight: 600;
    transition: color 0.3s ease;
}

header ul li a:hover {
    color: var(--primary-color);
}

/* Hero Section */
#hero {
    background: var(--light-color);
    padding: 80px 0;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.profile-picture {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid var(--primary-color);
    margin-bottom: 20px;
}

#hero h1 {
    font-size: 3rem;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.2rem;
    margin-bottom: 20px;
}

.btn {
    display: inline-block;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s ease;
    margin: 5px;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--light-color);
}

.btn-primary:hover {
    background: #004494;
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--light-color);
}

/* About Section */
#about p {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

/* Card Styling for Experience & Education */
.card {
    background: var(--light-color);
    padding: 30px;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    text-align: left;
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.card-subtitle {
    font-weight: 600;
    color: #777;
    margin-bottom: 15px;
}

.card ul {
    list-style-position: inside;
}

.card ul li {
    margin-bottom: 10px;
}

.experience-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

/* Styling Portofolio */
#portfolio {
    background: var(--secondary-color);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.project-card {
    background: var(--light-color);
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: left;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.project-card img {
    width: 100%;
    height: 200px;
    object-fit: contain;
    background-color: #2b303b;
}

.project-content {
    padding: 25px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-content h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.project-content p {
    font-size: 0.95rem;
    margin-bottom: 20px;
    flex-grow: 1;
}

.project-tags {
    margin-bottom: 20px;
}

.project-tags span {
    display: inline-block;
    background: var(--secondary-color);
    color: var(--text-color);
    padding: 5px 12px;
    margin: 2px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
}

.btn-link {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 600;
    align-self: flex-start;
}

.btn-link:hover {
    text-decoration: underline;
}

/* Skills Section */
.skills-category {
    margin-bottom: 30px;
    text-align: center;
}

.skills-category h4 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.skills-tags span {
    display: inline-block;
    background: var(--primary-color);
    color: var(--light-color);
    padding: 8px 15px;
    margin: 5px;
    border-radius: 20px;
    font-size: 0.9rem;
}

/* Footer */
footer {
    background: var(--dark-color);
    color: var(--light-color);
    text-align: center;
    padding: 30px 0;
}

footer a {
    color: var(--light-color);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* --- RESPONSIVE DESIGN --- */
/* Untuk Tablet dan layar yang lebih kecil */
@media(max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 1.8rem; }
    section { padding: 40px 0; }
    
    header .container {
        flex-direction: column;
    }
    header ul {
        margin-top: 15px;
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }

    .experience-grid, .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .card {
        padding: 20px;
    }

    .project-card img {
        height: 160px; /* Perkecil tinggi gambar di tablet/HP */
    }
}

/* Untuk Ponsel */
@media(max-width: 480px) {
    #hero h1 {
        font-size: 2rem;
    }
    .subtitle {
        font-size: 1rem;
    }
    .btn {
        width: 90%;
        padding: 12px 0;
    }
    .container {
        padding: 0 15px;
    }
}