/* 
 * Greenie Vietnam - Premium Organic B2B Design System
 * Standard: EU Export Standard 
 */

/* ==========================================================================
   1. VARIABLES & TOKENS
   ========================================================================== */
   :root {
    /* Color Palette: Premium Organic */
    --color-ivory-silk: #FDFBF7;
    --color-ivory-warm: #F5F0E8;
    --color-deep-forest: #1E3A2F;
    --color-muted-gold: #C5A880;
    --color-charcoal: #333333;
    --color-white: #FFFFFF;
    --color-error: #D32F2F;
    --color-success: #388E3C;

    /* Typography */
    --font-headline: 'Cormorant Garamond', serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;
    --space-2xl: 12rem;

    /* Borders & Shadows */
    --border-radius: 0; /* Premium sharp edges */
    --shadow-soft: 0 10px 40px rgba(30, 58, 47, 0.05);
    
    /* Layout */
    --container-max-width: 1440px;
    --container-padding: 2rem;
}

/* ==========================================================================
   2. RESET & BASE STYLES
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-body);
    color: var(--color-charcoal);
    background-color: var(--color-ivory-silk);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6, .font-headline {
    font-family: var(--font-headline);
    color: var(--color-deep-forest);
    font-weight: 400;
    line-height: 1.2;
}

h1 { font-size: clamp(3rem, 6vw, 5.5rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(2.5rem, 4vw, 3.5rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.75rem, 3vw, 2.5rem); }

p {
    font-size: 1.05rem;
    margin-bottom: 1rem;
    max-width: 70ch;
}

a {
    color: inherit;
    text-decoration: none;
    transition: all 0.3s ease;
}

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

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.text-center { text-align: center; }
.text-gold { color: var(--color-muted-gold); }
.italic { font-style: italic; }

/* ==========================================================================
   3. COMPONENTS
   ========================================================================== */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2.5rem;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 1px solid transparent;
}

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

.btn-primary:hover {
    background-color: var(--color-charcoal);
    transform: translateY(-2px);
    box-shadow: var(--shadow-soft);
}

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

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

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

.btn-gold:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-charcoal);
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    padding: 1rem;
    font-family: var(--font-body);
    font-size: 1rem;
    border: 1px solid rgba(51, 51, 51, 0.2);
    background-color: transparent;
    color: var(--color-charcoal);
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-deep-forest);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding: 1.5rem 0;
    transition: all 0.4s ease;
}

.header.scrolled {
    background-color: rgba(253, 251, 247, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 1rem 0;
    border-bottom: 1px solid rgba(197, 168, 128, 0.2);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-headline);
    font-size: 1.75rem;
    color: var(--color-deep-forest);
    font-style: italic;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo img {
    height: 32px;
}

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

.nav-link {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-weight: 500;
    color: var(--color-deep-forest);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--color-muted-gold);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.nav-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-deep-forest);
    cursor: pointer;
}

/* ==========================================================================
   4. SECTIONS (HOMEPAGE)
   ========================================================================== */

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 5rem;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
    /* For image generation overlay */
}

.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.hero-headline {
    margin-bottom: 2rem;
}

.hero-ctas {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Brand Manifesto */
.manifesto {
    padding: var(--space-2xl) 0;
    text-align: center;
    background-color: var(--color-ivory-warm);
}

.manifesto-quote {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    line-height: 1.4;
    color: var(--color-deep-forest);
    max-width: 900px;
    margin: 0 auto;
}

/* Product Grid Matrix */
.products-matrix {
    padding: var(--space-2xl) 0;
}

.product-matrix-item {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.product-matrix-item:nth-child(even) {
    flex-direction: row-reverse;
}

.product-matrix-img {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.product-matrix-img img {
    width: 100%;
    aspect-ratio: 4/5;
    object-fit: cover;
    transition: transform 1.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.product-matrix-item:hover .product-matrix-img img {
    transform: scale(1.05);
}

.product-matrix-content {
    flex: 1;
    padding: 0 var(--space-md);
}

.product-origin {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-muted-gold);
    margin-bottom: 1rem;
    display: block;
}

.product-title {
    margin-bottom: 1.5rem;
}

.product-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-deep-forest);
    font-weight: 500;
    border-bottom: 1px solid var(--color-muted-gold);
    padding-bottom: 0.25rem;
    margin-top: 2rem;
}

.product-link:hover {
    color: var(--color-muted-gold);
}

/* Trust Section */
.trust-section {
    padding: var(--space-xl) 0;
    background-color: var(--color-deep-forest);
    color: var(--color-white);
}

.trust-section h2 {
    color: var(--color-ivory-silk);
    text-align: center;
    margin-bottom: var(--space-lg);
}

.trust-counters {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    text-align: center;
    margin-bottom: var(--space-lg);
}

.counter-item .number {
    font-family: var(--font-headline);
    font-size: 4rem;
    color: var(--color-muted-gold);
    display: block;
    margin-bottom: 0.5rem;
}

.counter-item .label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(253, 251, 247, 0.8);
}

.trust-certs {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.trust-cert-icon {
    font-size: 1.5rem;
    color: var(--color-muted-gold);
    border: 1px solid var(--color-muted-gold);
    padding: 1.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
}

.trust-criteria {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.criteria-item {
    padding: var(--space-md);
    border-top: 1px solid rgba(197, 168, 128, 0.3);
}

.criteria-item h4 {
    color: var(--color-muted-gold);
    margin-bottom: 1rem;
    font-family: var(--font-body);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.9rem;
}

.criteria-item p {
    color: rgba(253, 251, 247, 0.8);
    font-size: 0.95rem;
}

/* Form Section */
.inquiry-section {
    padding: var(--space-xl) 0;
    background-color: var(--color-ivory-warm);
}

.inquiry-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

/* Footer */
.footer {
    background-color: var(--color-charcoal);
    color: var(--color-ivory-silk);
    padding: var(--space-lg) 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.footer-title {
    font-family: var(--font-headline);
    color: var(--color-muted-gold);
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

.footer-link {
    display: block;
    color: rgba(253, 251, 247, 0.7);
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}

.footer-link:hover {
    color: var(--color-muted-gold);
}

.footer-bottom {
    border-top: 1px solid rgba(253, 251, 247, 0.1);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: rgba(253, 251, 247, 0.5);
}

/* ==========================================================================
   5. LANDING PAGES
   ========================================================================== */
.lp-hero {
    height: 80vh;
    display: flex;
    align-items: center;
    position: relative;
    color: var(--color-white);
}

.lp-hero::after {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(rgba(30, 58, 47, 0.3), rgba(30, 58, 47, 0.6));
    z-index: 1;
}

.lp-hero-bg {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    object-fit: cover;
    z-index: 0;
}

.lp-hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.lp-hero h1 {
    color: var(--color-white);
    margin-bottom: 1rem;
}

.lp-section {
    padding: var(--space-xl) 0;
}

.lp-section-alt {
    background-color: var(--color-ivory-warm);
}

.lp-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    align-items: center;
}

.tech-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 2rem;
}

.tech-table th, .tech-table td {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(51, 51, 51, 0.1);
    text-align: left;
}

.tech-table th {
    font-family: var(--font-headline);
    color: var(--color-deep-forest);
    font-size: 1.2rem;
    width: 40%;
}

/* ==========================================================================
   6. ANIMATIONS
   ========================================================================== */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s ease, transform 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.parallax-img {
    will-change: transform;
}

/* ==========================================================================
   7. RESPONSIVE
   ========================================================================== */
@media (max-width: 991px) {
    .nav-links {
        display: none; /* Add mobile menu logic in JS */
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .product-matrix-item,
    .product-matrix-item:nth-child(even) {
        flex-direction: column;
    }
    
    .trust-counters,
    .trust-criteria,
    .inquiry-grid,
    .lp-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}