/* =================
   RESET & BASE STYLES
   ================= */

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

:root {
    /* Colors */
    --primary-color: #1a1a1a;
    --secondary-color: #ff6b35;
    --accent-color: #8b5cf6;
    --text-color: #333;
    --text-light: #666;
    --text-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-dark: #1a1a1a;
    --border-color: #e2e8f0;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 8px 40px rgba(0, 0, 0, 0.15);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border radius */
    --border-radius-sm: 4px;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-color);
    background-color: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* =================
   NAVIGATION
   ================= */

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-brand .logo {
    height: 40px;
    width: auto;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--secondary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: var(--transition);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    transition: var(--transition);
}

/* =================
   BUTTONS
   ================= */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

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

.btn-primary:hover {
    background: #e55a2b;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background: #fff;
    color: var(--text-color);
    border: 2px solid var(--border-color);
}

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

.btn-large {
    padding: 16px 32px;
    font-size: var(--font-size-base);
}

/* =================
   HERO SECTION
   ================= */

.hero {
    padding: 120px 0 var(--spacing-3xl);
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-content {
    z-index: 2;
}

.hero-title {
    margin-bottom: var(--spacing-md);
}

.brand-name {
    display: block;
    font-size: var(--font-size-5xl);
    font-weight: 900;
    color: #fff;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.hero-subtitle {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--secondary-color);
    margin-top: var(--spacing-xs);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: #fff;
    margin-bottom: var(--spacing-xl);
    max-width: 500px;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color:#fff;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: #fff;
    font-weight: 500;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.product-image {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.1));
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* =================
   SECTION STYLES
   ================= */

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* =================
   ABOUT SECTION
   ================= */

.about {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-light);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.about-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.about-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.card-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.card-icon i {
    font-size: var(--font-size-2xl);
    color: white;
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.card-description {
    color: var(--text-light);
    line-height: 1.7;
}

/* =================
   PRODUCTS SECTION
   ================= */

.products {
    padding: var(--spacing-3xl) 0;
}

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

.product-card {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
    position: relative;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.product-card.featured {
    border: 3px solid var(--secondary-color);
}

.featured-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--secondary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    font-weight: 600;
    z-index: 1;
}

.product-image {
    height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-image img {
    max-width: 80%;
    max-height: 80%;
    object-fit: contain;
}

.product-info {
    padding: var(--spacing-xl);
}

.product-name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.product-description {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.product-features {
    list-style: none;
}

.product-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-sm);
}

.product-features i {
    color: var(--secondary-color);
}

/* =================
   PARTNERSHIP SECTION
   ================= */

.partnership {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-light);
}

.partnership-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.benefits-list {
    margin: var(--spacing-xl) 0;
}

.benefit-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.benefit-item i {
    font-size: var(--font-size-xl);
    color: var(--secondary-color);
    width: 40px;
    text-align: center;
    margin-top: var(--spacing-xs);
}

.benefit-item h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.benefit-item p {
    color: var(--text-light);
    font-size: var(--font-size-sm);
}

.partnership-cta {
    margin-top: var(--spacing-xl);
}

.contact-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
    color: var(--text-light);
    font-size: var(--font-size-sm);
}

.partnership-image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
}

/* =================
   CONTACT SECTION
   ================= */

.contact {
    padding: var(--spacing-3xl) 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.contact-info {
    display: grid;
    gap: var(--spacing-lg);
}

.contact-card {
    padding: var(--spacing-lg);
    background: var(--bg-light);
    border-radius: var(--border-radius-lg);
    text-align: center;
}

.contact-card i {
    font-size: var(--font-size-2xl);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
}

.contact-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.contact-card p {
    color: var(--text-light);
    font-size: var(--font-size-sm);
}

/* =================
   CONTACT FORM
   ================= */

.contact-form-container {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
}

.contact-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

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

.checkbox-label {
    display: flex !important;
    align-items: flex-start !important;
    gap: var(--spacing-xs) !important;
    cursor: pointer;
    font-size: var(--font-size-sm) !important;
    line-height: 1.5;
}

.checkbox-label input[type="checkbox"] {
    margin: 0;
    padding: 0;
}

.error-message {
    color: #ef4444;
    font-size: var(--font-size-xs);
    margin-top: var(--spacing-xs);
    display: none;
}

.error-message.show {
    display: block;
}

.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: #ef4444;
}

/* =================
   FOOTER
   ================= */

.footer {
    background: var(--primary-color);
    color: var(--text-white);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    height: 50px;
    margin-bottom: var(--spacing-md);
}

.footer-brand p {
    color: #cbd5e1;
    font-size: var(--font-size-sm);
}

.footer-column h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.footer-column a {
    display: block;
    color: #cbd5e1;
    text-decoration: none;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--secondary-color);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.social-links a {
    width: 40px;
    height: 40px;
    background: #374151;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-legal {
    display: flex;
    gap: var(--spacing-md);
}

.footer-legal a {
    color: #cbd5e1;
    text-decoration: none;
    font-size: var(--font-size-xs);
}

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

/* =================
   RESPONSIVE DESIGN
   ================= */

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: white;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: var(--spacing-xl);
        transition: var(--transition);
        box-shadow: var(--shadow);
    }

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

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .hero {
        padding: 100px 0 var(--spacing-lg);
    }

    .brand-name {
        font-size: var(--font-size-3xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-xl);
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }

    .hero-stats {
        justify-content: center;
        gap: var(--spacing-lg);
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .partnership-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .contact-form {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-lg);
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

    .container {
        padding: 0 var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .brand-name {
        font-size: var(--font-size-2xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }

    .btn {
        padding: 10px 20px;
        font-size: var(--font-size-xs);
    }

    .btn-large {
        padding: 12px 24px;
        font-size: var(--font-size-sm);
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .about-card,
    .contact-form-container {
        padding: var(--spacing-md);
    }
}

/* =================
   ANIMATIONS & EFFECTS
   ================= */

@media (prefers-reduced-motion: no-preference) {
    .about-card,
    .product-card,
    .benefit-item {
        animation: fadeInUp 0.6s ease-out forwards;
        opacity: 0;
        transform: translateY(20px);
    }

    .about-card:nth-child(1) { animation-delay: 0.1s; }
    .about-card:nth-child(2) { animation-delay: 0.2s; }
    .about-card:nth-child(3) { animation-delay: 0.3s; }
    .about-card:nth-child(4) { animation-delay: 0.4s; }

    .product-card:nth-child(1) { animation-delay: 0.1s; }
    .product-card:nth-child(2) { animation-delay: 0.2s; }
    .product-card:nth-child(3) { animation-delay: 0.3s; }

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

/* =================
   UTILITY CLASSES
   ================= */

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

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }

.hidden { display: none; }
.visible { display: block; }

/* =================
   LOADING STATES
   ================= */

.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { left: -100%; }
    100% { left: 100%; }
}