/* --- CUSTOM PROPERTIES (THEMING) --- */
:root[data-theme="dark"] {
    --bg-primary: #0a0f1d;
    --bg-secondary: #121829;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #00d4ff; /* Cyan */
    --accent-rgb: 0, 212, 255;
    --card-border: #1e293b;
    --header-bg: rgba(10, 15, 29, 0.85);
}

:root[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent: #0066ff; /* Electric Blue */
    --accent-rgb: 0, 102, 255;
    --card-border: #e2e8f0;
    --header-bg: rgba(248, 250, 252, 0.85);
}

/* --- RESET & BASE STYLES --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* --- LAYOUT UTILITIES --- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

.text-center {
    text-align: center;
}

.section {
    padding: 7rem 0;
}

.section-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.75rem;
    color: var(--accent);
    margin-bottom: 3rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: var(--accent);
}

/* --- HEADER & NAV --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--header-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--card-border);
    transition: background-color 0.3s, border-color 0.3s;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 2rem;
}

/* --- LOGO <U>>< SYSTEM --- */
.logo-container {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    transition: transform 0.2s ease;
}

.logo-container:hover {
    transform: scale(1.05);
}

.code-u-fish {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    color: var(--accent);
    display: flex;
    align-items: center;
    line-height: 1;
    letter-spacing: -2px; /* Merapatkan karakter menjadi satu kesatuan */
}

.code-u-fish .head {
    font-size: 1.6rem; /* Diperbesar sedikit agar membungkus U */
}

.code-u-fish .body {
    font-size: 1.6rem;
    font-weight: 800;
    transform: translateY(1px);
    padding: 0 2px;
}

.code-u-fish .tail {
    font-size: 1.6rem;
    letter-spacing: -3px;
}

.logo-label {
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.nav {
    display: flex;
    gap: 2.5rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

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

/* --- THEME TOGGLE BUTTON --- */
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: background-color 0.2s;
}

.theme-toggle:hover {
    background-color: var(--card-border);
}

[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }
[data-theme="light"] .sun-icon { display: none; }
[data-theme="light"] .moon-icon { display: block; }

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

/* --- HERO SECTION --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 2rem;
    text-align: center;
}

.location-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--card-border);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background-color: #10b981;
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 3rem auto;
}

.btn-cta {
    display: inline-block;
    text-decoration: none;
    background-color: var(--accent);
    color: #0a0f1d;
    font-weight: 600;
    padding: 0.9rem 2rem;
    border-radius: 6px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 20px rgba(var(--accent-rgb), 0.25);
}

.btn-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(var(--accent-rgb), 0.4);
}

/* --- ABOUT SECTION --- */
.about-grid {
    display: flex;
    gap: 4rem;
    align-items: center;
}

.about-icon-wrapper {
    flex-shrink: 0;
}

.terminal-icon {
    width: 100px;
    height: 100px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 2rem;
    color: var(--accent);
}

.philosophy-text {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.25rem;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 1rem;
}

.about-text p:not(.philosophy-text) {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 700px;
}

/* --- WORK SECTION (PROJECTS) --- */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s cubic-bezier(0.25, 1, 0.5, 1), box-shadow 0.3s ease, border-color 0.3s ease;
}

.project-card:hover {
    transform: scale(1.03);
    border-color: var(--accent);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.project-content {
    padding: 2.2rem;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-name {
    font-size: 1.35rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 2rem;
    flex-grow: 1;
}

.tech-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.badge-tech {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
}

.project-links {
    display: flex;
    gap: 1.5rem;
}

.proj-link {
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: color 0.2s;
}

.proj-link.live {
    color: var(--accent);
}

.proj-link.github {
    color: var(--text-secondary);
}

.proj-link.github:hover {
    color: var(--text-primary);
}

/* --- TECH STACK SECTION --- */
.tech-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    max-width: 900px;
}

.tech-item {
    font-family: 'JetBrains Mono', monospace;
    background-color: var(--bg-secondary);
    border: 1px solid var(--card-border);
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-size: 0.95rem;
    transition: border-color 0.2s, color 0.2s;
}

.tech-item:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* --- CONTACT SECTION --- */
.contact-header {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.contact-subtitle {
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    border: 1px solid var(--card-border);
    padding: 0.8rem 1.8rem;
    border-radius: 6px;
    font-weight: 600;
    transition: border-color 0.2s, transform 0.2s;
}

.contact-btn:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.contact-btn .icon {
    width: 18px;
    height: 18px;
}

/* --- FOOTER --- */
.footer {
    text-align: center;
    padding: 3rem 0;
    border-top: 1px solid var(--card-border);
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
}

/* --- ANIMATION (SCROLL FADE-IN) --- */
.data-animate {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.data-animate.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- RESPONSIVE DESIGN (MOBILE) --- */
@media (max-width: 768px) {
    .header-container {
        padding: 1rem 1.5rem;
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .nav {
        gap: 1.2rem;
        order: 3; /* Memindahkan navigasi ke bawah pada layar kecil jika diperlukan */
        width: 100%;
        justify-content: center;
    }
    
    .nav-link {
        font-size: 0.85rem;
    }

    .section {
        padding: 5rem 0;
    }

    .about-grid {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
    }

    .contact-links {
        flex-direction: column;
        gap: 1rem;
    }
    
    .contact-btn {
        width: 100%;
        justify-content: center;
    }
}