/* ============================================= */
/* ONS PELLET - Main Stylesheet                 */
/* Version: 2.0 | Date: 2025                    */
/* ============================================= */

/* Fonts */
@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Source+Sans+Pro:wght@400;600&display=swap");

/* CSS Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: #FAFAFA;
    color: #1A1A1A;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

a {
    text-decoration: none;
    color: inherit;
}

ul, ol {
    list-style: none;
}

/* ============================================= */
/* CSS Variables                                */
/* ============================================= */
:root {
    /* Primary Colors */
    --color-primary: #1B4332;
    --color-primary-light: #2D6A4F;
    --color-primary-dark: #0D2818;
    
    /* Accent Colors */
    --color-accent: #D4A373;
    --color-accent-light: #E9C46A;
    --color-accent-dark: #BC8A5F;
    
    /* Neutral Colors */
    --color-white: #FFFFFF;
    --color-gray-50: #FAFAFA;
    --color-gray-100: #F5F5F5;
    --color-gray-200: #E5E5E5;
    --color-gray-300: #D4D4D4;
    --color-gray-400: #A3A3A3;
    --color-gray-500: #737373;
    --color-gray-600: #525252;
    --color-gray-700: #404040;
    --color-gray-800: #262626;
    --color-gray-900: #171717;
    
    /* Semantic Colors */
    --color-success: #22C55E;
    --color-warning: #F59E0B;
    --color-error: #EF4444;
    
    /* Typography */
    --font-heading: 'Inter', sans-serif;
    --font-body: 'Source Sans Pro', sans-serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Container */
    --container-max: 1280px;
}

/* ============================================= */
/* Layout                                       */
/* ============================================= */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

@media (min-width: 640px) {
    .container { padding: 0 var(--space-lg); }
}

@media (min-width: 1024px) {
    .container { padding: 0 var(--space-xl); }
}

.section {
    padding: var(--space-3xl) 0;
}

@media (min-width: 768px) {
    .section { padding: var(--space-4xl) 0; }
}

.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(1, 1fr); }
.grid-3 { grid-template-columns: repeat(1, 1fr); }
.grid-4 { grid-template-columns: repeat(1, 1fr); }

@media (min-width: 640px) {
    .grid-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* ============================================= */
/* Typography                                   */
/* ============================================= */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-gray-900);
}

.h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
.h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
.h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
.h4 { font-size: clamp(1.125rem, 2vw, 1.25rem); }

.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-white { color: var(--color-white); }
.text-gray { color: var(--color-gray-600); }
.text-gray-light { color: var(--color-gray-400); }

.lead {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    line-height: 1.7;
}

@media (min-width: 768px) {
    .lead { font-size: 1.25rem; }
}

/* ============================================= */
/* Header & Navigation                          */
/* ============================================= */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo img {
    height: 48px;
    width: auto;
}

.logo-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-primary);
}

.logo-tagline {
    font-size: 0.75rem;
    color: var(--color-gray-500);
}

/* Desktop Navigation */
.nav-desktop {
    display: none;
    align-items: center;
    gap: var(--space-xl);
}

@media (min-width: 1024px) {
    .nav-desktop { display: flex; }
}

.nav-link {
    font-weight: 500;
    color: var(--color-gray-600);
    transition: color var(--transition-fast);
    padding: var(--space-sm) 0;
    position: relative;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
}

/* Language Switcher */
.lang-switcher {
    display: none;
    align-items: center;
    gap: var(--space-xs);
}

@media (min-width: 768px) {
    .lang-switcher { display: flex; }
}

.lang-btn {
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-500);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

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

/* Mobile Menu Button */
.mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--color-primary);
}

@media (min-width: 1024px) {
    .mobile-menu-btn { display: none; }
}

/* Mobile Navigation */
.nav-mobile {
    display: none;
    padding: var(--space-md) 0;
    border-top: 1px solid var(--color-gray-200);
}

.nav-mobile.open {
    display: block;
}

@media (min-width: 1024px) {
    .nav-mobile { display: none !important; }
}

.nav-mobile a {
    display: block;
    padding: var(--space-sm) 0;
    color: var(--color-gray-700);
    font-weight: 500;
}

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

/* ============================================= */
/* Hero Section                                 */
/* ============================================= */
.hero {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.2;
}

.hero-content {
    position: relative;
    z-index: 10;
    color: var(--color-white);
    max-width: 800px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}

.hero-title span {
    color: var(--color-accent);
}

.hero-text {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    opacity: 0.9;
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.hero-stat {
    text-align: center;
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
}

.hero-stat-value {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-accent);
}

.hero-stat-label {
    font-size: 0.875rem;
    opacity: 0.8;
    margin-top: var(--space-xs);
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
}

/* ============================================= */
/* Buttons                                      */
/* ============================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-gray-900);
}

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

.btn-secondary {
    background: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

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

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

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

.btn-lg {
    padding: var(--space-lg) var(--space-2xl);
    font-size: 1.125rem;
}

.btn-sm {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.875rem;
}

/* ============================================= */
/* Cards                                        */
/* ============================================= */
.card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
}

.card-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    color: var(--color-white);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-md);
}

.card-icon svg {
    width: 32px;
    height: 32px;
}

.card-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--space-sm);
}

.card-text {
    color: var(--color-gray-600);
    line-height: 1.6;
}

/* Feature Card */
.feature-card {
    text-align: center;
    padding: var(--space-2xl);
}

/* Product Card */
.product-card {
    overflow: hidden;
    padding: 0;
}

.product-card .card-img {
    height: 240px;
    margin: 0;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.product-card-body {
    padding: var(--space-lg);
}

.product-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-accent);
    color: var(--color-gray-900);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
}

/* ============================================= */
/* Section Styles                               */
/* ============================================= */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-3xl);
}

.section-label {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: rgba(27, 67, 50, 0.1);
    color: var(--color-primary);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: var(--space-md);
}

.section-desc {
    color: var(--color-gray-600);
    font-size: 1.125rem;
    line-height: 1.7;
}

/* Background Variants */
.bg-white { background-color: var(--color-white); }
.bg-light { background-color: var(--color-gray-50); }
.bg-primary { background-color: var(--color-primary); }
.bg-dark { background-color: var(--color-gray-900); }

/* ============================================= */
/* About/Features Section                       */
/* ============================================= */
.about-grid {
    display: grid;
    gap: var(--space-3xl);
    align-items: center;
}

@media (min-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.about-image {
    position: relative;
}

.about-image img {
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.about-image-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--color-accent);
    color: var(--color-gray-900);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.about-image-badge strong {
    display: block;
    font-size: 2rem;
    font-family: var(--font-heading);
}

.about-content h2 {
    margin-bottom: var(--space-lg);
}

.about-content p {
    color: var(--color-gray-600);
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.about-list {
    margin: var(--space-xl) 0;
}

.about-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.about-list-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-success);
    color: var(--color-white);
    border-radius: var(--radius-full);
}

.about-list-icon svg {
    width: 14px;
    height: 14px;
}

/* ============================================= */
/* Stats Section                                */
/* ============================================= */
.stats-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

@media (min-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

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

.stat-value {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    color: var(--color-accent);
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.8;
    margin-top: var(--space-xs);
}

/* ============================================= */
/* Certifications                               */
/* ============================================= */
.cert-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 2px solid transparent;
    transition: all var(--transition-base);
}

.cert-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.cert-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-100);
    border-radius: var(--radius-full);
}

.cert-icon img {
    width: 50px;
    height: 50px;
    object-fit: contain;
}

.cert-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.cert-desc {
    color: var(--color-gray-600);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* ============================================= */
/* Contact Section                              */
/* ============================================= */
.contact-grid {
    display: grid;
    gap: var(--space-2xl);
}

@media (min-width: 1024px) {
    .contact-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.contact-info-item {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.contact-info-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-md);
}

.contact-info-icon svg {
    width: 24px;
    height: 24px;
}

.contact-info-label {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin-bottom: var(--space-xs);
}

.contact-info-value {
    font-weight: 600;
    color: var(--color-gray-900);
}

/* Contact Form */
.contact-form {
    background: var(--color-white);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--space-sm);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-md);
    font-family: inherit;
    font-size: 1rem;
    color: var(--color-gray-900);
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

/* ============================================= */
/* Footer                                       */
/* ============================================= */
.footer {
    background: var(--color-gray-900);
    color: var(--color-white);
    padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-grid {
    display: grid;
    gap: var(--space-2xl);
    margin-bottom: var(--space-3xl);
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

.footer-brand p {
    color: var(--color-gray-400);
    margin: var(--space-md) 0;
    line-height: 1.7;
}

.footer-social {
    display: flex;
    gap: var(--space-sm);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-800);
    color: var(--color-gray-400);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background: var(--color-accent);
    color: var(--color-gray-900);
}

.footer-title {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--space-lg);
}

.footer-links a {
    display: block;
    color: var(--color-gray-400);
    padding: var(--space-xs) 0;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-gray-800);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

.footer-bottom p {
    color: var(--color-gray-500);
    font-size: 0.875rem;
}

.footer-legal {
    display: flex;
    gap: var(--space-lg);
}

.footer-legal a {
    color: var(--color-gray-500);
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.footer-legal a:hover {
    color: var(--color-accent);
}

/* ============================================= */
/* Utilities                                    */
/* ============================================= */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.hidden { display: none !important; }
.block { display: block; }
.inline-block { display: inline-block; }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

/* Accessibility */
.focus-visible:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ============================================= */
/* Animations                                   */
/* ============================================= */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeInUp 0.6s ease forwards;
}

/* ============================================= */
/* Table Styles                                 */
/* ============================================= */
.table-wrapper {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: var(--space-md);
    text-align: left;
    border-bottom: 1px solid var(--color-gray-200);
}

.data-table th {
    background: var(--color-gray-50);
    font-weight: 600;
    color: var(--color-gray-700);
}

.data-table td {
    color: var(--color-gray-600);
}

.data-table tr:hover td {
    background: var(--color-gray-50);
}

/* ============================================= */
/* CTA Section                                  */
/* ============================================= */
.cta-section {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: var(--color-gray-900);
    text-align: center;
}

.cta-title {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    margin-bottom: var(--space-md);
}

.cta-text {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: var(--space-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

.cta-section .btn-primary:hover {
    background: var(--color-primary-dark);
}