/* CSS VARIABLES & DESIGN SYSTEM */
:root {
    --primary-color: #6366f1;       /* Indigo Accent */
    --secondary-color: #14b8a6;     /* Teal Accent */
    --dark-neutral: #0f172a;        /* Slate 900 */
    --body-text: #334155;           /* Slate 700 */
    --light-neutral: #f8fafc;       /* Slate 50 */
    --white: #ffffff;
    --border-color: #e2e8f0;        /* Slate 200 */
    --card-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.05);
    --hover-shadow: 0 20px 25px -5px rgba(99, 102, 241, 0.15);
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
}

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

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

body {
    font-family: var(--font-body);
    color: var(--body-text);
    background-color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--dark-neutral);
    font-weight: 600;
}

a {
    text-transform: none;
    text-decoration: none;
    color: inherit;
    transition: var(--transition-smooth);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* LAYOUT CONTAINER */
.section-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 24px;
}

.text-center {
    text-align: center;
    margin-bottom: 50px;
}

/* TYPOGRAPHY ELEMENTS */
.section-subtitle {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--dark-neutral);
}

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-smooth);
    cursor: pointer;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: #4f46e5;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.2);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--white);
    color: var(--white);
}

.btn-outline:hover {
    background-color: var(--white);
    color: var(--dark-neutral);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.85rem;
}

.btn-block {
    width: 100%;
}

/* 1. HEADER & NAVBAR */
.navbar-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition-smooth);
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark-neutral);
}

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

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

.nav-link {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--body-text);
    position: relative;
}

.nav-link:hover, .nav-link:focus {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition-smooth);
}

.nav-link:hover::after {
    width: 100%;
}

.menu-toggle-checkbox, .menu-toggle-btn {
    display: none;
}

/* 2. HERO SECTION */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
    color: var(--white);
    padding-top: 80px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent 20%, rgba(15, 23, 42, 0.8) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 40px 24px;
}

.hero-image-container {
    width: 150px;
    height: 150px;
    margin: 0 auto 24px auto;
    border-radius: 50%;
    padding: 6px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.hero-profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--secondary-color);
    margin-bottom: 16px;
}

.hero-tagline {
    font-size: 1.1rem;
    color: #94a3b8;
    margin-bottom: 40px;
    font-style: italic;
}

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

/* 3. TENTANG SAYA */
.about-section {
    background-color: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
}

.about-image-box {
    position: relative;
}

.about-img {
    width: 100%;
    border-radius: var(--radius-md);
    box-shadow: var(--card-shadow);
}

.about-image-box::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    width: 100px;
    height: 100px;
    border-top: 4px solid var(--primary-color);
    border-left: 4px solid var(--primary-color);
    border-top-left-radius: var(--radius-sm);
}

.about-description {
    font-size: 1.05rem;
    color: var(--body-text);
    margin-top: 20px;
    margin-bottom: 35px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.stat-card {
    background-color: var(--light-neutral);
    padding: 20px;
    border-radius: var(--radius-sm);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition-smooth);
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.stat-number {
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--body-text);
}

/* 4. KEAHLIAN */
.skills-section {
    background-color: var(--light-neutral);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.skill-card {
    background-color: var(--white);
    padding: 24px;
    border-radius: var(--radius-sm);
    box-shadow: var(--card-shadow);
    border: 1px solid transparent;
    transition: var(--transition-smooth);
}

.skill-card:hover {
    border-color: rgba(99, 102, 241, 0.2);
    box-shadow: var(--hover-shadow);
}

.skill-header {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
}

.skill-icon {
    font-size: 1.75rem;
    margin-right: 16px;
    width: 30px;
    text-align: center;
}

.html-color { color: #e34c26; }
.js-color { color: #f7df1e; }
.react-color { color: #61dafb; }
.figma-color { color: #f24e1e; }
.node-color { color: #339933; }
.ui-color { color: #00b4d8; }

.skill-name {
    font-size: 1.1rem;
    font-weight: 600;
    flex-grow: 1;
}

.skill-percentage {
    font-weight: 600;
    color: var(--dark-neutral);
}

.progress-bar-bg {
    width: 100%;
    height: 8px;
    background-color: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 4px;
    transition: width 1.5s ease-in-out;
}

/* 5. PORTOFOLIO */
.portfolio-section {
    background-color: var(--white);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.portfolio-card {
    background-color: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    transition: var(--transition-smooth);
}

.portfolio-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--hover-shadow);
}

.portfolio-img-box {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4 / 3;
    background-color: var(--light-neutral);
}

.portfolio-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.portfolio-card:hover .portfolio-img {
    transform: scale(1.08);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-smooth);
}

.portfolio-card:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-info {
    padding: 20px;
}

.portfolio-category {
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--secondary-color);
    letter-spacing: 1px;
    display: block;
    margin-bottom: 6px;
}

.portfolio-item-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--dark-neutral);
}

/* 6. VIDEO PERKENALAN */
.video-section {
    background-color: var(--light-neutral);
}

.video-wrapper {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* 7. TESTIMONI */
.testimonial-section {
    background-color: var(--white);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.testimonial-card {
    background-color: var(--light-neutral);
    padding: 32px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition-smooth);
}

.testimonial-card:hover {
    background-color: var(--white);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: var(--card-shadow);
}

.testimonial-rating {
    color: #ffb703;
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.testimonial-quote {
    font-size: 0.95rem;
    color: var(--body-text);
    font-style: italic;
    margin-bottom: 24px;
    line-height: 1.7;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 14px;
}

.author-img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

.author-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--dark-neutral);
}

.author-role {
    font-size: 0.8rem;
    color: #64748b;
    display: block;
}

/* 8. KONTAK */
.contact-section {
    background-color: var(--light-neutral);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 50px;
    background-color: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

.contact-info-box {
    background: linear-gradient(135deg, var(--primary-color) 0%, #4f46e5 100%);
    color: var(--white);
    padding: 48px;
    display: flex;
    flex-direction: column;
}

.contact-info-title {
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.contact-info-desc {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    font-size: 0.95rem;
}

.info-details {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.info-icon-box {
    width: 44px;
    height: 44px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.info-text span {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: rgba(255, 255, 255, 0.6);
    display: block;
}

.info-text p {
    font-size: 1rem;
    font-weight: 500;
}

.contact-form-box {
    padding: 48px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--dark-neutral);
    font-family: var(--font-heading);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--dark-neutral);
    outline: none;
    transition: var(--transition-smooth);
}

.form-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

textarea.form-input {
    resize: vertical;
}

/* 9. FOOTER */
.main-footer {
    background-color: var(--dark-neutral);
    color: rgba(255, 255, 255, 0.6);
}

.footer-container {
    padding: 60px 24px 30px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 30px;
}

.footer-brand .logo {
    color: var(--white);
    margin-bottom: 8px;
}

.footer-tagline {
    font-size: 0.95rem;
    max-width: 400px;
}

.footer-socials {
    display: flex;
    gap: 16px;
}

.social-link {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.1rem;
}

.social-link:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.footer-copyright {
    width: 100%;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    font-size: 0.85rem;
}

/* RESPONSIVE DESIGN & MEDIA QUERIES */

@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .about-image-box {
        max-width: 500px;
        margin: 0 auto;
    }
    .portfolio-grid, .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    html {
        font-size: 15px;
    }
    
    .section-container {
        padding: 60px 20px;
    }

    /* Navbar Responsive Checkbox Hack */
    .menu-toggle-btn {
        display: block;
        font-size: 1.5rem;
        color: var(--dark-neutral);
        cursor: pointer;
        z-index: 1001;
        transition: var(--transition-smooth);
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background-color: var(--white);
        box-shadow: -10px 0 30px rgba(0,0,0,0.1);
        flex-direction: column;
        padding: 100px 40px;
        gap: 24px;
        transition: cubic-bezier(0.4, 0, 0.2, 1) 0.4s;
    }

    .menu-toggle-checkbox:checked ~ .nav-menu {
        right: 0;
    }

    .menu-toggle-checkbox:checked ~ .menu-toggle-btn .icon-open {
        display: none;
    }

    .menu-toggle-checkbox:checked ~ .menu-toggle-btn .icon-close {
        display: block;
    }

    .menu-toggle-btn .icon-close {
        display: none;
    }

    .skills-grid, .contact-grid {
        grid-template-columns: 1fr;
    }

    .contact-info-box, .contact-form-box {
        padding: 32px;
    }

    .hero-title {
        font-size: 2.75rem;
    }
}

@media (max-width: 576px) {
    .portfolio-grid, .testimonial-grid {
        grid-template-columns: 1fr;
    }

    .hero-cta {
        flex-direction: column;
        gap: 12px;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
        gap: 12px;
    }
}