:root {
    --bg-dark: #121212;
    --bg-card: #1E1E1E;
    --bg-accent: #171717;
    
    --primary: #10B981;
    --primary-glow: rgba(16, 185, 129, 0.4);
    --secondary: #2DD4BF;
    
    --text-main: #F3F4F6; 
    --text-muted: #9CA3AF; 
    --border-color: rgba(255, 255, 255, 0.1);
    
    --font-main: 'Inter', sans-serif;
    --transition: all 0.3s ease;
}



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

html {
    scroll-behavior: smooth;
}

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

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

.section-padding {
    padding: 80px 0;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 40px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}


.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(18, 18, 18, 0.85); 
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

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

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

.btn-nav {
    padding: 8px 20px;
    border: 1px solid var(--primary);
    border-radius: 50px;
    color: var(--primary) !important;
}

.btn-nav:hover {
    background: var(--primary);
    color: var(--bg-dark) !important;
}


.hero-section {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: radial-gradient(circle at top right, #0f2e2e 0%, var(--bg-dark) 60%);
}

.hero-content {
    max-width: 700px;
    z-index: 2;
    position: relative;
}

.greeting {
    color: var(--secondary);
    font-weight: 600;
    letter-spacing: 1px;
}

.gradient-text {
    font-size: 4rem;
    font-weight: 800;
    background: linear-gradient(135deg, #e0e0e0 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin: 10px 0;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 30px;
    font-weight: 400;
}

.hero-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 20px;
    border-left: 4px solid var(--primary);
    border-radius: 8px;
    margin-bottom: 40px;
    backdrop-filter: blur(5px);
}


.cta-group {
    display: flex;
    gap: 20px;
}

.btn {
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
}

.btn-primary {
    background: var(--primary);
    color: var(--bg-dark);
    box-shadow: 0 0 15px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 25px var(--primary-glow);
}

.btn-outline {
    border: 1px solid var(--text-muted);
    color: var(--text-main);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}


.about-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 50px;
    align-items: center;
}

.photo-frame {
    width: 100%;
    aspect-ratio: 1/1;
    border: 2px solid var(--border-color);
    padding: 15px;
    border-radius: 20px;
    position: relative;
}

.photo{
    width: 100%;
    height: 100%;
    border-radius: 15px;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

.photo img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* biar foto nggak ketarik aneh */
    border-radius: 15px; /* ikut bentuk rounded */
}
    


.info-cards {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.info-item {
    background: var(--bg-card);
    padding: 10px 20px;
    border-radius: 50px;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.bg-accent {
    background-color: var(--bg-accent);
}

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

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 30px;
    border-radius: 16px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 15px;
}

.card-header h3 {
    font-size: 1.2rem;
}

.badge {
    font-size: 0.75rem;
    padding: 4px 10px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--primary);
    border-radius: 4px;
}

.project-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.tech-stack {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.tech-stack span {
    font-size: 0.8rem;
    color: var(--text-muted);
    background: #2a2a2a;
    padding: 4px 8px;
    border-radius: 4px;
}

.btn-sm {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    align-self: flex-start;
}

.btn-sm:hover {
    background: var(--primary);
    color: var(--bg-dark);
    border-color: var(--primary);
}

/* --- SKILLS SECTION --- */
.skills-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.skill-category h3 {
    margin-bottom: 20px;
    color: var(--secondary);
}

.skill-item {
    background: var(--bg-card);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 15px;
    border-left: 3px solid var(--primary);
}

.skill-item h4 {
    font-size: 1rem;
    margin-bottom: 5px;
}

.skill-item p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

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

.tag {
    background: rgba(255, 255, 255, 0.05);
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.tag:hover {
    border-color: var(--secondary);
    color: var(--secondary);
}

.contact-section {
    background: linear-gradient(to top, #0f2e2e 0%, var(--bg-dark) 100%);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.social-links {
    margin-top: 20px;
    display: flex;
    gap: 20px;
}

.social-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--primary);
}

.contact-form {
    background: rgba(255, 255, 255, 0.03);
    padding: 30px;
    border-radius: 16px;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.form-group input, 
.form-group textarea {
    width: 100%;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    padding: 12px;
    border-radius: 8px;
    color: var(--text-main);
    font-family: var(--font-main);
    outline: none;
    transition: var(--transition);
}

.form-group input:focus, 
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

.full-width {
    width: 100%;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

footer {
    text-align: center;
    padding: 30px;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-dark);
}

@media (max-width: 768px) {
    .gradient-text { font-size: 2.5rem; }
    .about-grid, .contact-wrapper, .skills-layout { grid-template-columns: 1fr; }
    .nav-links { display: none; } /* Simplified for demo */
    .hero-content { text-align: center; }
    .cta-group { justify-content: center; }
}

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

.skills-section {
    background-color: var(--bg-dark);
    background-image: radial-gradient(circle at 10% 20%, rgba(20, 184, 166, 0.05) 0%, transparent 40%);
    padding: 80px 20px;
    color: var(--text-primary);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

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

.section-header {
    margin-bottom: 60px;
    max-width: 700px;
}

.sub-heading {
    display: block;
    font-size: 0.85rem;
    letter-spacing: 2px;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 12px;
    text-transform: uppercase;
}

.main-heading {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.section-desc .highlight {
    color: var(--text-highlight);
    font-weight: 500;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); /* Responsive Grid */
    gap: 24px;
    margin-bottom: 60px;
}

.skill-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid rgba(255,255,255,0.05);
    border-left: 3px solid transparent; /* Hidden border untuk efek hover */
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.skill-card:hover {
    transform: translateY(-5px);
    border-left-color: var(--accent);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5), 
                0 0 20px -10px var(--accent-glow);
    background: var(--bg-card-hover);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.card-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.badge {
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: 20px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge.advanced { background: rgba(20, 184, 166, 0.15); color: #2dd4bf; }
.badge.intermediate { background: rgba(99, 102, 241, 0.15); color: #818cf8; }
.badge.fundamental { background: rgba(244, 63, 94, 0.15); color: #fb7185; }

.card-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.5;
}

.divider {
    height: 1px;
    background: rgba(255,255,255,0.05);
    margin-bottom: 20px;
}


.sub-skills {
    list-style: none;
    margin-bottom: 24px;
}

.sub-skills li {
    font-size: 0.9rem;
    color: #cbd5e1;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
}

.sub-skills li::before {
    content: "▹"; 
    color: var(--accent);
    margin-right: 10px;
    font-size: 1rem;
}

.card-footer {
    font-size: 0.85rem;
}

.tool-label {
    color: var(--text-secondary);
    margin-right: 5px;
}

.tool-list {
    color: var(--accent);
    font-family: monospace; 
}


.process-section {
    margin-bottom: 60px;
}

.section-subtitle {
    font-size: 1.5rem;
    margin-bottom: 24px;
    color: var(--text-primary);
    border-left: 4px solid var(--accent);
    padding-left: 16px;
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.process-card {
    background: rgba(255,255,255,0.02);
    padding: 24px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255,255,255,0.05);
    transition: var(--transition);
}

.process-card:hover {
    background: rgba(255,255,255,0.05);
}

.step-number {
    font-size: 2rem;
    font-weight: 800;
    color: rgba(255,255,255,0.05); 
    margin-bottom: 8px;
}

.process-card h4 {
    color: var(--accent);
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.process-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.4;
}


.bottom-grid {
    display: grid;
    grid-template-columns: 2fr 1fr; 
    gap: 40px;
    align-items: start;
}


.tools-category {
    display: flex;
    align-items: center;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.cat-name {
    width: 80px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

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

.tag {
    background: rgba(255,255,255,0.03);
    color: var(--text-primary);
    padding: 6px 14px;
    border-radius: 4px;
    font-size: 0.85rem;
    border: 1px solid rgba(255,255,255,0.05);
    transition: var(--transition);
}

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

/* Stats */
.stats-wrapper {
    display: flex;
    flex-direction: column;
    gap: 20px;
    background: rgba(20, 184, 166, 0.03); 
    padding: 24px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(20, 184, 166, 0.1);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.stat-number {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

@media (max-width: 900px) {
    .process-grid {
        grid-template-columns: repeat(2, 1fr); 
    }
    .bottom-grid {
        grid-template-columns: 1fr; 
    }
    .stats-wrapper {
        flex-direction: row;
        justify-content: space-around;
        text-align: center;
    }
    .stat-item {
        flex-direction: column;
        gap: 5px;
    }
}

@media (max-width: 600px) {
    .section-header h2 { font-size: 2rem; }
    .process-grid { grid-template-columns: 1fr; } 
    .cat-name { width: 100%; margin-bottom: 8px; }
    .stats-wrapper { flex-direction: column; text-align: left; }
    .stat-item { flex-direction: row; }
}

/* --- PROCESS SECTION (How I Work) --- */
.section-title-wrapper {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
}

.section-line {
    height: 1px;
    background: linear-gradient(90deg, var(--accent) 0%, transparent 100%);
    flex-grow: 1;
    opacity: 0.3;
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.process-card {
    background: rgba(30, 41, 59, 0.4); /* Slate 800 with opacity */
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: 24px 20px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    min-height: 200px;
}

/* Hover Interaction: Lift & Glow */
.process-card:hover {
    transform: translateY(-5px);
    border-color: rgba(20, 184, 166, 0.4);
    box-shadow: 0 10px 40px -10px rgba(0,0,0,0.5);
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.7) 0%, rgba(20, 184, 166, 0.05) 100%);
}

/* Big Number styling */
.card-bg-number {
    position: absolute;
    top: -10px;
    right: -10px;
    font-size: 5rem;
    font-weight: 800;
    color: rgba(5, 51, 8, 0.325);
    z-index: 0;
    transition: all 0.4s ease;
    font-family: 'Inter', sans-serif;
}

.process-card:hover .card-bg-number {
    color: rgba(20, 184, 166, 0.1);
    transform: scale(1.1) translate(-10px, 10px);
}

/* Icons */
.card-icon {
    margin-bottom: 15px;
    z-index: 1;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.03);
    border-radius: 8px;
    color: var(--accent);
    transition: 0.3s;
}

.card-icon svg {
    width: 20px;
    height: 20px;
}

.process-card:hover .card-icon {
    background: var(--accent);
    color: #fff;
    transform: rotate(-10deg);
}

.card-content {
    z-index: 1;
}

.process-card h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 6px;
    font-weight: 600;
}

.process-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* --- TECH STACK (Premium Chips) --- */
.bottom-grid {
    margin-top: 60px;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
}

.cat-header {
    font-size: 0.75rem;
    letter-spacing: 1.5px;
    color: var(--text-secondary);
    margin-bottom: 15px;
    font-weight: 700;
    opacity: 0.7;
}

.tool-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.tool-chip {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 10px 16px;
    border-radius: 12px;
    font-size: 0.9rem;
    color: var(--text-primary);
    cursor: default;
    transition: all 0.3s ease;
}

.tool-chip:hover {
    background: rgba(20, 184, 166, 0.08);
    border-color: rgba(20, 184, 166, 0.4);
    transform: translateY(-3px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.tool-icon {
    width: 18px;
    height: 18px;
    opacity: 0.8;
    filter: grayscale(100%); /* Monochrome awal */
    transition: 0.3s;
}

.tool-chip:hover .tool-icon {
    filter: grayscale(0%); /* Warna asli saat hover */
    opacity: 1;
}

/* --- METRICS (SaaS Stats) --- */
.stats-column {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 15px;
    background: linear-gradient(90deg, rgba(255,255,255,0.03) 0%, transparent 100%);
    border-left: 2px solid rgba(255,255,255,0.1);
    padding: 15px 20px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    transition: 0.3s;
}

.stat-card:hover {
    border-left-color: var(--accent);
    background: linear-gradient(90deg, rgba(20, 184, 166, 0.05) 0%, transparent 100%);
    transform: translateX(5px);
}

.stat-icon-bg {
    color: var(--accent);
    opacity: 0.8;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 2px;
}

.stat-number::after {
    content: "+";
    color: var(--accent);
    font-size: 1rem;
    vertical-align: top;
    margin-left: 2px;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* RESPONSIVE */
@media (max-width: 900px) {
    .process-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .bottom-grid {
        grid-template-columns: 1fr;
    }
    .stats-column {
        flex-direction: row;
        justify-content: space-between;
    }
    .stat-card {
        flex: 1;
    }
}

@media (max-width: 600px) {
    .process-grid {
        grid-template-columns: 1fr;
    }
    .stats-column {
        flex-direction: column;
    }
}

/* 2. SECTION LAYOUT */
.contact-section {
    position: relative;
    background-color: var(--bg-dark-contact);
    padding: 100px 20px 40px;
    overflow: hidden;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

/* Ambient Glow (Background Light) */
.ambient-glow-left {
    position: absolute;
    top: 20%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(20, 184, 166, 0.1) 0%, transparent 70%);
    filter: blur(100px);
    z-index: 0;
    pointer-events: none;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr; /* Kiri info, Kanan form */
    gap: 80px;
    align-items: center;
    margin-bottom: 80px;
}

/* 3. LEFT COLUMN (INFO & SOCIALS) */
.contact-info {
    padding-right: 20px;
}

.sub-heading {
    display: block;
    color: var(--accent-teal);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 12px;
    text-transform: uppercase;
}

.main-heading {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    line-height: 1.2;
}

.contact-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 40px;
}

/* --- SOCIAL LINKS (FIXED ICON VISIBILITY) --- */
.social-links-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 25px; /* Jarak antar item */
}

.social-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    
    /* Warna Text & Icon Default (Abu Terang) */
    color: var(--text-muted); 
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 5px 0;
}

/* Style SVG Icon */
.social-link svg {
    width: 22px;
    height: 22px;
    min-width: 22px; /* Mencegah gepeng */
    
    /* PENTING: Agar garis terlihat */
    stroke: currentColor; /* Ikut warna text */
    stroke-width: 2;
    fill: none; /* Tengah bolong */
    
    transition: transform 0.3s ease;
}

/* Hover State */
.social-link:hover {
    color: var(--accent-teal); /* Berubah jadi Teal */
    transform: translateY(-3px);
}

.social-link:hover svg {
    filter: drop-shadow(0 0 8px var(--accent-glow)); /* Glow Effect */
}

/* 4. RIGHT COLUMN (GLASS FORM) */
.contact-form-wrapper {
    background: var(--glass-bg);
    border: 1px solid var(--border-light);
    border-radius: 20px;
    padding: 40px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Input Fields */
.input-group {
    position: relative;
    width: 100%;
}

.input-group input,
.input-group textarea {
    width: 100%;
    background: rgba(15, 23, 42, 0.6); /* Lebih gelap */
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 16px 20px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

.input-group textarea {
    min-height: 140px;
    resize: vertical;
}

.input-group input::placeholder,
.input-group textarea::placeholder {
    color: rgba(148, 163, 184, 0.5);
}

/* Input Focus Effect */
.input-group input:focus,
.input-group textarea:focus {
    border-color: var(--accent-teal);
    background: rgba(15, 23, 42, 0.9);
    box-shadow: 0 0 0 4px rgba(20, 184, 166, 0.15);
}

/* 5. SUBMIT BUTTON (MODERN SAAS STYLE) */
.btn-submit {
    width: 100%;
    height: 54px;
    background: linear-gradient(135deg, var(--accent-teal) 0%, #0d9488 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(20, 184, 166, 0.3);
    margin-top: 10px;
}

.btn-submit svg {
    transition: transform 0.3s ease;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(20, 184, 166, 0.5);
    filter: brightness(1.1);
}

.btn-submit:active {
    transform: translateY(0);
}

.btn-submit:hover svg {
    transform: translate(3px, -3px); /* Icon pesawat terbang naik */
}

/* 6. FOOTER COPYRIGHT */
.footer-copyright {
    text-align: center;
    margin-top: 40px;
    border-top: 1px solid var(--border-light);
    padding-top: 30px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* 7. RESPONSIVE DESIGN */
@media (max-width: 900px) {
    .contact-grid {
        grid-template-columns: 1fr; /* Stack jadi 1 kolom */
        gap: 50px;
    }

    .contact-info {
        padding-right: 0;
        text-align: center;
    }
    
    .social-links-wrapper {
        justify-content: center;
    }

    .contact-desc {
        margin: 0 auto 30px;
    }

    .ambient-glow-left {
        width: 300px;
        height: 300px;
        left: 50%;
        transform: translateX(-50%);
        top: 0;
    }
}

@media (max-width: 600px) {
    .contact-section {
        padding: 60px 20px 30px;
    }

    .main-heading {
        font-size: 2rem;
    }

    .contact-form-wrapper {
        padding: 25px;
    }
    
    .btn-submit {
        height: 50px;
    }
}