/* Custom Properties / Variabel CSS */
:root {
    --primary: #1e3a8a; /* Biru Royal / Biru Tua */
    --primary-hover: #1e40af;
    --secondary: #eff6ff; /* Biru Muda / Latar Belakang */
    --accent: #06b6d4; /* Cyan */
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --white: #ffffff;
    --border: #e5e7eb;
    
    --radius-md: 8px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --transition: all 0.3s ease;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; /* Offset untuk sticky navbar */
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    line-height: 1.2;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: var(--primary);
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2rem;
}

.text-accent {
    color: var(--accent);
}

section {
    padding: 5rem 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0.6rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.btn-large {
    padding: 0.8rem 2rem;
    font-size: 1.05rem;
}

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

.btn-primary:hover, .btn-primary:focus-visible {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
}

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

.btn-outline:hover, .btn-outline:focus-visible {
    background-color: var(--secondary);
}

/* Accessibility Focus */
:focus-visible {
    outline: 2px dashed var(--accent);
    outline-offset: 4px;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    height: 70px;
    display: flex;
    align-items: center;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary);
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.95rem;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--primary);
    border-radius: 3px;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    padding: 8rem 0 5rem;
    overflow: hidden;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
}

.badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background-color: var(--secondary);
    color: var(--primary);
    font-weight: 600;
    font-size: 0.875rem;
    border-radius: 50px;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1.2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.hero-image-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    background-color: var(--secondary); /* Fallback offline */
}

.hero-image {
    border-radius: var(--radius-lg);
    position: relative;
    z-index: 2;
    box-shadow: var(--shadow-md);
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
}

.hero-shape {
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: var(--primary);
    border-radius: var(--radius-lg);
    top: 20px;
    left: 20px;
    z-index: 1;
}

/* Grid Layouts */
.features-grid, .steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.ac-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
}

/* Cards */
.feature-card, .service-card, .step-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.feature-card:hover, .service-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-5px);
    border-color: var(--secondary);
}

.feature-icon, .service-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: var(--secondary);
    color: var(--primary);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
}

.step-card {
    text-align: center;
    position: relative;
}

.step-number {
    width: 40px;
    height: 40px;
    background-color: var(--primary);
    color: var(--white);
    font-weight: bold;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin: 0 auto 1rem;
}

/* Pricing Section */
.pricing-container {
    max-width: 600px;
    margin: 0 auto 1.5rem;
    background: var(--white);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    overflow: hidden;
}

.price-item {
    display: flex;
    justify-content: space-between;
    padding: 1.2rem 1.5rem;
    border-bottom: 1px solid var(--border);
}

.price-item:last-child {
    border-bottom: none;
}

.price-name {
    font-weight: 600;
    color: var(--text-dark);
}

.price-value {
    color: var(--primary);
    font-weight: 700;
}

.pricing-note {
    text-align: center;
    font-size: 0.85rem;
    font-style: italic;
}

/* About & Contact */
.info-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.info-item svg {
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 4px;
}

.about-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    width: 100%;
    aspect-ratio: 1/1;
    object-fit: cover;
    background-color: var(--border); /* Offline fallback */
}

/* FAQ Accordion */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.accordion {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    overflow: hidden;
}

.accordion-header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 1.5rem;
    background: var(--white);
    border: none;
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary);
    cursor: pointer;
    text-align: left;
    font-family: inherit;
    transition: var(--transition);
}

.accordion-header:hover {
    background-color: var(--secondary);
}

.accordion-icon {
    transition: transform 0.3s ease;
}

.accordion-header[aria-expanded="true"] .accordion-icon {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background: var(--white);
}

.accordion-content p {
    padding: 0 1.5rem 1.2rem;
    margin: 0;
}

/* Footer */
.footer {
    background-color: var(--primary);
    color: var(--white);
    padding: 4rem 0 2rem;
}

.footer-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer h3, .footer h4 {
    color: var(--white);
}

.footer p {
    color: var(--secondary);
    opacity: 0.8;
}

.footer-links ul li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--secondary);
    opacity: 0.8;
}

.footer-links a:hover {
    opacity: 1;
    color: var(--accent);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.9rem;
}

.footer-bottom .credit {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    opacity: 0.7;
}

@media screen and (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: var(--white);
        flex-direction: column;
        justify-content: flex-start;
        padding: 3rem 2rem;
        transition: 0.4s ease-in-out;
    }

    .nav-menu.active {
        right: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
}

@media screen and (min-width: 768px) {
    .features-grid, .steps-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-container {
        grid-template-columns: 2fr 1fr;
    }

    .hero h1 {
        font-size: 3rem;
    }
}

@media screen and (min-width: 1024px) {
    .hero-container, .ac-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .hero-buttons {
        flex-wrap: nowrap;
    }

    .services-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (prefers-reduced-motion: reduce) {
    *, ::before, ::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}