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

:root {
    --color-primary: #0a2a40;
    --color-primary-light: #0d3b5c;
    --color-accent: #1a8cba;
    --color-accent-light: #e8f4f9;
    --color-white: #ffffff;
    --color-off-white: #f6f8fa;
    --color-gray-100: #f0f2f4;
    --color-gray-200: #e2e6ea;
    --color-gray-300: #c5cdd5;
    --color-gray-600: #6b7c8a;
    --color-gray-800: #32373c;
    --color-gray-900: #1a1d20;
    --color-success: #357b49;
    --color-warning: #fcb900;
    --font-heading: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --max-width: 1200px;
    --header-height: 80px;
    --radius: 6px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --transition: 0.25s ease;
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-body);
    color: var(--color-gray-800);
    background: var(--color-white);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary); }

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.25;
}
h1 { font-size: 2.75rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.2rem; }

p + p { margin-top: 1em; }

.section { padding: 80px 0; }
.section--gray { background: var(--color-off-white); }
.section__label { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-accent); font-weight: 600; margin-bottom: 8px; }
.section__title { margin-bottom: 16px; }
.section__subtitle { font-size: 1.1rem; color: var(--color-gray-600); max-width: 700px; margin-bottom: 48px; }
.section__title--center, .section__subtitle--center { text-align: center; }
.section__subtitle--center { margin-left: auto; margin-right: auto; }

.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 32px; border-radius: var(--radius);
    font-weight: 600; font-size: 1rem;
    transition: all var(--transition);
    cursor: pointer; border: 2px solid transparent;
    text-decoration: none; line-height: 1.2;
}
.btn--primary { background: var(--color-accent); color: var(--color-white); border-color: var(--color-accent); }
.btn--primary:hover { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.btn--outline { background: transparent; color: var(--color-accent); border-color: var(--color-accent); }
.btn--outline:hover { background: var(--color-accent); color: #fff; }
.btn--white { background: var(--color-white); color: var(--color-primary); }
.btn--white:hover { background: var(--color-gray-100); }

/* ============================================
   3. Header & Navigation
   ============================================ */
.site-header {
    position: sticky; top: 0; z-index: 1000;
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    height: var(--header-height);
}
.site-header__inner {
    display: flex; align-items: center; justify-content: space-between;
    height: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
}
.site-logo { font-size: 1.5rem; font-weight: 800; color: var(--color-primary); }
.site-logo span { color: var(--color-accent); }
.site-logo img { max-height: 48px; }

.main-nav { display: flex; align-items: center; gap: 32px; list-style: none; }
.main-nav a {
    color: var(--color-gray-800); font-weight: 500; font-size: 0.95rem;
    padding: 8px 0; position: relative;
}
.main-nav a::after {
    content: ''; position: absolute; bottom: 0; left: 0;
    width: 0; height: 2px; background: var(--color-accent);
    transition: width var(--transition);
}
.main-nav a:hover { color: var(--color-accent); }
.main-nav a:hover::after { width: 100%; }
.main-nav .current-menu-item a { color: var(--color-accent); }
.main-nav .current-menu-item a::after { width: 100%; }

.header-cta { margin-left: 16px; }

.mobile-toggle {
    display: none; flex-direction: column; gap: 5px;
    background: none; border: none; cursor: pointer; padding: 4px;
}
.mobile-toggle span {
    display: block; width: 26px; height: 2px;
    background: var(--color-primary); border-radius: 2px;
}

/* ============================================
   4. Hero / Banner
   ============================================ */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white); padding: 120px 0 100px;
    position: relative; overflow: hidden;
}
.hero::before {
    content: ''; position: absolute; top: -50%; right: -10%;
    width: 600px; height: 600px; border-radius: 50%;
    background: rgba(255,255,255,0.03);
}
.hero::after {
    content: ''; position: absolute; bottom: -30%; left: -5%;
    width: 400px; height: 400px; border-radius: 50%;
    background: rgba(255,255,255,0.02);
}
.hero__inner { position: relative; z-index: 1; max-width: 700px; }
.hero__label { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.1em; opacity: 0.8; font-weight: 600; margin-bottom: 12px; }
.hero__title { font-size: 3rem; font-weight: 800; color: var(--color-white); margin-bottom: 20px; }
.hero__desc { font-size: 1.15rem; opacity: 0.9; margin-bottom: 36px; line-height: 1.7; max-width: 560px; }
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ============================================
   5. Product Grid
   ============================================ */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 32px; }
.product-card {
    background: var(--color-white); border-radius: var(--radius);
    box-shadow: var(--shadow-sm); overflow: hidden;
    transition: box-shadow var(--transition), transform var(--transition);
}
.product-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.product-card__image {
    width: 100%; height: 260px; object-fit: cover;
    background: var(--color-gray-100);
}
.product-card__body { padding: 24px; }
.product-card__category { font-size: 0.8rem; text-transform: uppercase; color: var(--color-accent); font-weight: 600; letter-spacing: 0.05em; margin-bottom: 6px; }
.product-card__title { font-size: 1.15rem; margin-bottom: 8px; }
.product-card__title a { color: var(--color-primary); }
.product-card__title a:hover { color: var(--color-accent); }
.product-card__desc { color: var(--color-gray-600); font-size: 0.95rem; margin-bottom: 16px; }
.product-card__link { font-weight: 600; font-size: 0.9rem; display: inline-flex; align-items: center; gap: 6px; }

.category-nav { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 40px; }
.category-nav__item {
    padding: 10px 22px; border-radius: 30px;
    background: var(--color-gray-100); color: var(--color-gray-800);
    font-weight: 500; font-size: 0.9rem; border: none; cursor: pointer;
    transition: all var(--transition);
}
.category-nav__item:hover, .category-nav__item--active {
    background: var(--color-accent); color: var(--color-white);
}

/* ============================================
   6. Features / Value Props
   ============================================ */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 32px; }
.feature-card { text-align: center; padding: 40px 24px; }
.feature-card__icon {
    width: 64px; height: 64px; margin: 0 auto 20px;
    background: var(--color-accent-light); border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.6rem;
}
.feature-card__title { margin-bottom: 10px; }
.feature-card__desc { color: var(--color-gray-600); font-size: 0.95rem; }

.stats-bar { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 32px; text-align: center; padding: 60px 0; }
.stat__number { font-size: 2.75rem; font-weight: 800; color: var(--color-accent); }
.stat__label { color: var(--color-gray-600); font-size: 0.95rem; margin-top: 4px; }

/* ============================================
   7. About Section
   ============================================ */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.about-image { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); }
.about-image img { width: 100%; height: auto; }
.about-content h2 { margin-bottom: 20px; }
.about-content p { color: var(--color-gray-600); margin-bottom: 16px; }
.cert-badges { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.cert-badge {
    padding: 8px 16px; background: var(--color-accent-light);
    color: var(--color-accent); border-radius: var(--radius);
    font-weight: 600; font-size: 0.85rem;
}

/* ============================================
   8. Contact Form
   ============================================ */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-info__item {
    display: flex; gap: 16px; margin-bottom: 28px;
    align-items: flex-start;
}
.contact-info__icon {
    width: 48px; height: 48px; background: var(--color-accent-light);
    border-radius: 12px; display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem; flex-shrink: 0;
}
.contact-info__label { font-weight: 600; color: var(--color-primary); margin-bottom: 2px; }
.contact-info__value { color: var(--color-gray-600); font-size: 0.95rem; }

.contact-form { display: grid; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-weight: 600; font-size: 0.9rem; color: var(--color-primary); }
.form-group input,
.form-group textarea,
.form-group select {
    padding: 14px 16px; border: 2px solid var(--color-gray-200);
    border-radius: var(--radius); font-size: 1rem; font-family: var(--font-body);
    transition: border-color var(--transition);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none; border-color: var(--color-accent);
}
.form-group textarea { min-height: 140px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* ============================================
   9. Footer
   ============================================ */
.site-footer {
    background: var(--color-primary); color: rgba(255,255,255,0.8);
    padding: 64px 0 32px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer__brand h3 { color: var(--color-white); font-size: 1.3rem; margin-bottom: 12px; }
.footer__brand p { font-size: 0.9rem; margin-bottom: 16px; }
.footer__column h4 { color: var(--color-white); font-size: 1rem; margin-bottom: 16px; }
.footer__column ul { list-style: none; }
.footer__column li { margin-bottom: 10px; }
.footer__column a { color: rgba(255,255,255,0.7); font-size: 0.9rem; }
.footer__column a:hover { color: var(--color-white); }
.footer__bottom {
    border-top: 1px solid rgba(255,255,255,0.12);
    padding-top: 24px; text-align: center; font-size: 0.85rem;
}

/* ============================================
   10. Mobile Menu
   ============================================ */
@media (max-width: 1024px) {
    .main-nav { display: none; }
    .header-cta { display: none; }
    .mobile-toggle { display: flex; }
    
    .main-nav--open {
        display: flex; flex-direction: column;
        position: absolute; top: var(--header-height); left: 0;
        width: 100%; background: var(--color-white);
        padding: 24px; box-shadow: var(--shadow-md);
        gap: 16px;
    }
    
    .hero__title { font-size: 2.25rem; }
    .about-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .hero { padding: 80px 0 60px; }
    .hero__title { font-size: 1.75rem; }
    .section { padding: 48px 0; }
    .product-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .stats-bar { grid-template-columns: 1fr 1fr; }
    .hero__actions { flex-direction: column; }
}