/* 
   Thật Chất - Premium Landing Page CSS 
   Design System: Earthy, Minimalist, Glassmorphism
*/

:root {
    --color-bg: #fdfbf7;      /* Warm off-white */
    --color-text: #2c2c2c;    /* Soft black */
    --color-primary: #3c4a3e; /* Forest green dark */
    --color-accent: #c4a052;  /* Muted gold */
    --color-white: #ffffff;
    
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

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

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

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

ul {
    list-style: none;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Typography */
h1, h2, h3, .brand-logo {
    font-family: var(--font-heading);
    font-weight: 500;
    line-height: 1.2;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3.5rem);
    margin-bottom: 1.5rem;
    color: var(--color-primary);
}

.highlight {
    color: var(--color-accent);
    font-style: italic;
}

.lead {
    font-size: 1.25rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: 1.5rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-family: var(--font-body);
    font-weight: 500;
    letter-spacing: 0.5px;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    border: 1px solid var(--color-primary);
}

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

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

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

/* Glassmorphism utility */
.glass-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.05);
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 0;
    z-index: 1000;
    transition: var(--transition-smooth);
}

.navbar.scrolled {
    background: rgba(253, 251, 247, 0.9);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    box-shadow: 0 2px 20px rgba(0,0,0,0.05);
}

.nav-container {
    width: 90%;
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    gap: 3rem;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-accent);
    transition: var(--transition-smooth);
}

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

.hamburger {
    display: none;
    cursor: pointer;
    z-index: 1001;
}

.hamburger .bar {
    display: block;
    width: 25px;
    height: 2px;
    margin: 5px auto;
    background-color: var(--color-primary);
    transition: var(--transition-smooth);
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: 0 5%;
    gap: 4rem;
}

.hero-content {
    padding-top: 5rem;
}

.hero-content h1 {
    font-size: clamp(3rem, 6vw, 5rem);
    margin-bottom: 1.5rem;
}

.hero-content p {
    font-size: 1.1rem;
    color: #555;
    margin-bottom: 2.5rem;
    max-width: 500px;
}

.hero-image-wrapper {
    position: relative;
    height: 80vh;
    border-radius: 20px;
    overflow: hidden;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
}

.overlay-card {
    position: absolute;
    bottom: 2rem;
    left: -2rem; /* Asymmetric pop-out */
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.overlay-card .icon {
    font-size: 2rem;
}

.overlay-card p {
    font-weight: 500;
    font-size: 0.9rem;
    line-height: 1.4;
}

/* --- About Section --- */
.about {
    padding: 10rem 0;
    background-color: var(--color-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: center;
}

.about-image img {
    border-radius: 12px;
    box-shadow: -20px 20px 0px rgba(196, 160, 82, 0.1); /* Accent drop shadow */
}

.features-list {
    margin-top: 3rem;
}

.features-list li {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.feature-icon {
    font-size: 2rem;
    background: var(--color-bg);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.features-list h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.features-list p {
    color: #666;
    font-size: 0.95rem;
}

/* --- Products Section --- */
.products {
    padding: 8rem 0;
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 5rem;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.product-card {
    group: product;
}

.product-image {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 4/5;
    margin-bottom: 1.5rem;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-overlay {
    position: absolute;
    top: 1rem;
    left: 1rem;
}

.tag {
    background: var(--color-white);
    color: var(--color-primary);
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.product-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.product-info p {
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

/* --- Footer --- */
.contact {
    padding: 8rem 0 4rem;
    background-color: var(--color-primary);
    color: var(--color-white);
}

.contact .section-title {
    color: var(--color-white);
}

.footer-desc {
    color: rgba(255,255,255,0.7);
    margin-bottom: 3rem;
}

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

.contact-box {
    max-width: 500px;
    margin: 0 auto 4rem;
    padding: 3rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-box a {
    color: var(--color-accent);
}

.social-links {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.social-links a {
    color: var(--color-white);
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

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

.copyright {
    color: rgba(255,255,255,0.4);
    font-size: 0.85rem;
}

/* --- Animations & Utilities --- */
.fade-in-up {
    animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.fade-in {
    animation: fadeIn 1.5s ease-out forwards;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Scroll Reveal Classes (Handled by JS) */
.scroll-reveal {
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.scroll-reveal.active {
    opacity: 1;
    transform: translate(0, 0);
}

.scroll-reveal.up { transform: translateY(50px); }
.scroll-reveal.left { transform: translateX(-50px); }
.scroll-reveal.right { transform: translateX(50px); }

/* Apply variable delay if needed */
.scroll-reveal[style*="--delay"] {
    transition-delay: var(--delay);
}

/* --- Responsive --- */
@media (max-width: 992px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: 8rem;
    }
    
    .hero-content {
        padding-top: 0;
    }
    
    .hero-content p {
        margin: 0 auto 2.5rem;
    }
    
    .hero-image-wrapper {
        height: 60vh;
        width: 100%;
    }
    
    .overlay-card {
        left: 2rem;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
    
    .about-image {
        order: -1;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        left: -100%;
        top: 0;
        flex-direction: column;
        background-color: var(--color-bg);
        width: 100%;
        height: 100vh;
        justify-content: center;
        align-items: center;
        transition: 0.3s;
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .hamburger {
        display: block;
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }
    
    .section-title {
        font-size: 2.5rem;
    }
}