/* --- CSS Variables & Reset --- */
:root {
    --color-primary: #00f2ff;
    --color-primary-dark: #00c8d4;
    --color-secondary: #0a192f;
    --color-bg: #050b14;
    --color-bg-alt: #0d1b2a;
    --color-text: #e6f1ff;
    --color-text-muted: #8892b0;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(0, 242, 255, 0.15);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    --neon-glow: 0 0 10px rgba(0, 242, 255, 0.5), 0 0 20px rgba(0, 242, 255, 0.3);
    --font-heading: 'Orbitron', sans-serif;
    --font-body: 'Inter', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(0, 242, 255, 0.05) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(0, 242, 255, 0.05) 0%, transparent 20%);
}

/* --- Typography & Chrome Effect --- */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

.chrome-text {
    background: linear-gradient(to bottom, #ffffff 0%, #a0c4ff 40%, #00f2ff 50%, #a0c4ff 60%, #ffffff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(0, 242, 255, 0.2);
    letter-spacing: 0.05em;
}

/* --- Layout Utilities --- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    border-radius: 8px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    letter-spacing: 0.05em;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-secondary);
    box-shadow: var(--neon-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(0, 242, 255, 0.7);
}

.btn-secondary {
    background: rgba(0, 242, 255, 0.1);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-secondary:hover {
    background: rgba(0, 242, 255, 0.2);
}

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

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

/* --- Navbar --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(5, 11, 20, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 0;
}

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

.logo {
    height: 40px;
    width: auto;
    display: block;
}

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

.nav-menu ul {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

.nav-menu a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    transition: var(--transition);
}

.nav-menu a:hover {
    color: var(--color-primary);
    text-shadow: 0 0 8px rgba(0, 242, 255, 0.5);
}

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

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition);
}

/* --- Hero Section --- */
.hero {
    position: relative;
    padding: 10rem 0 6rem;
    text-align: center;
    overflow: hidden;
}

.hero-bg-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 242, 255, 0.15) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
}

.hero-headline {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 1.5rem;
    font-weight: 900;
}

.hero-subheadline {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-muted);
    max-width: 700px;
    margin: 0 auto 2.5rem;
}

.hero-cta-group {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

/* --- Slider --- */
.slider-section {
    padding: 2rem 0 4rem;
}

.slider-container {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    aspect-ratio: 16 / 7; /* Mencegah layout shifting */
    background: var(--color-bg-alt);
}

.slider-track {
    display: flex;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    height: 100%;
}

.slide {
    min-width: 100%;
    height: 100%;
}

.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.slider-dots {
    position: absolute;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.5rem;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.dot.active {
    background: var(--color-primary);
    box-shadow: 0 0 8px var(--color-primary);
}

/* --- Features Grid --- */
.features-section {
    padding: 4rem 0;
}

.section-title {
    text-align: center;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    transition: var(--transition);
}

.feature-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 242, 255, 0.4);
    box-shadow: 0 10px 40px -10px rgba(0, 242, 255, 0.15);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--color-primary);
}

.feature-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.card-link {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.card-link:hover {
    color: var(--color-primary);
    gap: 0.75rem;
}

/* --- AI Info Section --- */
.ai-info-section {
    padding: 4rem 0;
}

.ai-info-card {
    text-align: center;
    padding: 3rem 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.ai-info-card h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.ai-info-card p {
    color: var(--color-text-muted);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* --- Footer --- */
.footer {
    background: var(--color-secondary);
    border-top: 1px solid var(--glass-border);
    padding: 4rem 0 2rem;
    margin-top: 4rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    margin-bottom: 1rem;
    height: 40px;
    width: auto;
}

.footer-brand p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    max-width: 300px;
}

.footer-links h4, .footer-legal h4 {
    color: var(--color-text);
    margin-bottom: 1.25rem;
    font-size: 1rem;
}

.footer-links ul, .footer-legal ul {
    list-style: none;
}

.footer-links li, .footer-legal li {
    margin-bottom: 0.75rem;
}

.footer-links a, .footer-legal a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover, .footer-legal a:hover {
    color: var(--color-primary);
}

.disclaimer {
    margin-top: 1.5rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.03);
    border-left: 3px solid var(--color-primary);
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

/* --- AI Chat Widget --- */
.ai-chat-widget {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 9999;
}

.ai-chat-toggle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border: none;
    color: var(--color-secondary);
    cursor: pointer;
    box-shadow: var(--neon-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.ai-chat-toggle:hover {
    transform: scale(1.1);
}

.ai-chat-window {
    position: absolute;
    bottom: 80px;
    right: 0;
    width: 380px;
    height: 550px;
    background: var(--color-secondary);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.95);
    transition: var(--transition);
}

.ai-chat-window.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.ai-chat-header {
    padding: 1rem;
    background: rgba(0, 242, 255, 0.05);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.ai-header-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.ai-avatar {
    width: 36px;
    height: 36px;
    background: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.ai-header-info h4 {
    font-size: 0.95rem;
    color: var(--color-text);
    margin: 0;
}

.ai-status {
    font-size: 0.75rem;
    color: #00ff88;
    display: flex;
    align-items: center;
    gap: 4px;
}

.ai-status::before {
    content: '';
    width: 6px;
    height: 6px;
    background: #00ff88;
    border-radius: 50%;
    display: inline-block;
}

.ai-close-btn {
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
}

.ai-chat-messages {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background: var(--color-bg);
}

.message {
    max-width: 85%;
    padding: 0.875rem 1rem;
    border-radius: 12px;
    font-size: 0.9rem;
    line-height: 1.5;
}

.ai-message {
    background: rgba(0, 242, 255, 0.1);
    border: 1px solid rgba(0, 242, 255, 0.2);
    color: var(--color-text);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.user-message {
    background: var(--color-primary);
    color: var(--color-secondary);
    align-self: flex-end;
    border-bottom-right-radius: 4px;
    font-weight: 500;
}

.ai-quick-questions {
    padding: 0.75rem 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    border-top: 1px solid var(--glass-border);
    background: var(--color-bg-alt);
}

.quick-q {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--color-primary);
    padding: 0.4rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

.quick-q:hover {
    background: rgba(0, 242, 255, 0.15);
    border-color: var(--color-primary);
}

.ai-chat-input-area {
    padding: 1rem;
    display: flex;
    gap: 0.5rem;
    background: var(--color-secondary);
    border-top: 1px solid var(--glass-border);
}

.ai-chat-input-area input {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 0.9rem;
    outline: none;
}

.ai-chat-input-area input:focus {
    border-color: var(--color-primary);
}

.ai-chat-input-area button {
    background: var(--color-primary);
    border: none;
    border-radius: 8px;
    width: 40px;
    color: var(--color-secondary);
    cursor: pointer;
    font-size: 1.1rem;
    transition: var(--transition);
}

.ai-chat-input-area button:hover {
    background: var(--color-primary-dark);
}

/* --- Responsive Design --- */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(5, 11, 20, 0.98);
        backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--glass-border);
        transform: translateY(-150%);
        transition: var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
    }
    
    .nav-menu ul {
        flex-direction: column;
        align-items: center;
        gap: 1.25rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .ai-chat-widget {
        bottom: 1rem;
        right: 1rem;
    }
    
    .ai-chat-window {
        width: calc(100vw - 2rem);
        right: -1rem;
        height: 70vh;
        max-height: 600px;
    }
    
    .hero {
        padding: 8rem 0 4rem;
    }
    
    .slider-container {
        aspect-ratio: 16 / 9;
    }
}

@media (max-width: 480px) {
    .hero-cta-group {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-cta-group .btn {
        width: 100%;
    }
}