/* ===== YouMi Industry - Main Stylesheet ===== */

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #0f172a;
    --accent: #f59e0b;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --white: #ffffff;
    --shadow: 0 4px 24px rgba(0,0,0,0.08);
    --shadow-hover: 0 8px 40px rgba(0,0,0,0.12);
    --radius: 12px;
    --transition: all 0.3s ease;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.7;
    color: var(--gray-800);
    background: var(--white);
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-200);
    padding: 0;
}
.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}
.logo {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--secondary);
    text-decoration: none;
    letter-spacing: -0.5px;
}
.logo span { color: var(--primary); }

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
    align-items: center;
}
.nav-menu a {
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 8px;
    transition: var(--transition);
    font-size: 0.95rem;
}
.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary);
    background: rgba(37,99,235,0.08);
}

/* Dropdown */
.dropdown { position: relative; }
.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-hover);
    min-width: 200px;
    padding: 8px 0;
    list-style: none;
    border: 1px solid var(--gray-200);
}
.dropdown:hover .dropdown-menu { display: block; }
.dropdown-menu a {
    display: block;
    padding: 10px 20px;
    border-radius: 0;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-800);
    cursor: pointer;
}

/* ===== Hero ===== */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #2563eb 100%);
    color: var(--white);
    text-align: center;
}
.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -1px;
}
.hero .highlight {
    background: linear-gradient(135deg, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero p {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.8);
    max-width: 640px;
    margin: 0 auto 40px;
}
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}
.btn-primary {
    background: var(--primary);
    color: var(--white);
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(37,99,235,0.3);
}
.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255,255,255,0.3);
}
.btn-outline:hover {
    border-color: var(--white);
    background: rgba(255,255,255,0.1);
}
.btn-lg { padding: 18px 42px; font-size: 1.1rem; }
.btn-sm {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 20px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}
.btn-sm:hover { gap: 10px; }
.btn-block { width: 100%; justify-content: center; }

/* ===== Features ===== */
.features {
    padding: 80px 0;
    background: var(--gray-50);
}
.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.feature-card {
    background: var(--white);
    padding: 36px 24px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--gray-100);
}
.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}
.feature-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 16px;
}
.feature-card h3 { margin-bottom: 8px; font-size: 1.2rem; }
.feature-card p { color: var(--gray-500); font-size: 0.95rem; }

/* ===== Section Header ===== */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}
.section-header h2 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 12px;
}
.section-header p {
    color: var(--gray-500);
    font-size: 1.1rem;
}

/* ===== Products Preview ===== */
.products-preview { padding: 100px 0; }
.product-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.product-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-100);
    transition: var(--transition);
}
.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}
.product-img {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.product-img i { font-size: 4rem; color: rgba(255,255,255,0.8); }
.product-info { padding: 24px; }
.product-info h3 { font-size: 1.3rem; margin-bottom: 8px; }
.product-info > p { color: var(--gray-500); font-size: 0.9rem; margin-bottom: 16px; }
.product-specs {
    list-style: none;
    margin-bottom: 16px;
}
.product-specs li {
    font-size: 0.85rem;
    color: var(--gray-600);
    padding: 4px 0;
    border-bottom: 1px solid var(--gray-100);
}
.product-specs span { font-weight: 600; color: var(--gray-800); }

/* ===== Why Us ===== */
.why-us {
    padding: 100px 0;
    background: var(--gray-50);
}
.why-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
    max-width: 800px;
    margin: 0 auto;
}
.why-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.why-item i {
    font-size: 1.8rem;
    color: var(--primary);
    flex-shrink: 0;
}
.why-item h4 { margin-bottom: 4px; }
.why-item p { color: var(--gray-500); font-size: 0.9rem; }

/* ===== CTA ===== */
.cta {
    padding: 100px 0;
    text-align: center;
    background: linear-gradient(135deg, #1e3a5f, #2563eb);
    color: var(--white);
}
.cta h2 { font-size: 2.4rem; margin-bottom: 16px; }
.cta p { font-size: 1.1rem; color: rgba(255,255,255,0.8); margin-bottom: 32px; }

/* ===== Page Header ===== */
.page-header {
    padding: 140px 0 60px;
    background: var(--secondary);
    color: var(--white);
    text-align: center;
}
.page-header h1 { font-size: 2.5rem; margin-bottom: 8px; }
.page-header p { color: rgba(255,255,255,0.7); font-size: 1.1rem; }

/* ===== Product Detail ===== */
.product-detail { padding: 80px 0; }
.alt-bg { background: var(--gray-50); }

.product-detail-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 40px;
}
.product-detail-icon {
    width: 72px;
    height: 72px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.product-detail-icon i { font-size: 2rem; color: var(--white); }
.product-detail-header h2 { font-size: 1.8rem; }
.subtitle { color: var(--gray-500); }

.product-gallery-specs {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 32px;
}
.placeholder-img {
    background: var(--gray-100);
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius);
    height: 340px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
}
.placeholder-img i { font-size: 3rem; margin-bottom: 8px; }

.specs-table { width: 100%; border-collapse: collapse; }
.specs-table tr { border-bottom: 1px solid var(--gray-200); }
.specs-table td { padding: 12px 8px; font-size: 0.95rem; vertical-align: top; }
.specs-table td:first-child { font-weight: 600; color: var(--gray-700); width: 35%; white-space: nowrap; }

.product-cta {
    background: var(--gray-50);
    padding: 32px;
    border-radius: var(--radius);
    text-align: center;
    border: 1px solid var(--gray-200);
}
.product-cta p { margin-bottom: 16px; color: var(--gray-600); }

/* ===== About ===== */
.about-content { padding: 80px 0; }
.about-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 48px;
    align-items: center;
}
.about-text h2 { font-size: 1.8rem; margin-bottom: 20px; }
.about-text p { color: var(--gray-600); margin-bottom: 16px; }
.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.stat-box {
    background: var(--gray-50);
    padding: 32px 20px;
    border-radius: var(--radius);
    text-align: center;
    border: 1px solid var(--gray-200);
}
.stat-box h3 {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--primary);
}
.stat-box p { color: var(--gray-500); font-size: 0.9rem; }

.about-values {
    padding: 80px 0;
    background: var(--gray-50);
}
.about-values h2 { text-align: center; font-size: 2rem; margin-bottom: 48px; }
.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.value-card {
    background: var(--white);
    padding: 32px 20px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
}
.value-card i { font-size: 2rem; color: var(--primary); margin-bottom: 12px; }
.value-card h3 { margin-bottom: 8px; }

/* ===== Contact ===== */
.contact-section { padding: 80px 0; }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 48px;
}
.contact-info-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    align-content: start;
}
.contact-card {
    background: var(--gray-50);
    padding: 24px;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
}
.contact-card i { font-size: 1.5rem; color: var(--primary); margin-bottom: 8px; }
.contact-card h3 { font-size: 1rem; margin-bottom: 4px; }
.contact-card p, .contact-card a { font-size: 0.9rem; color: var(--gray-600); text-decoration: none; }
.contact-card a:hover { color: var(--primary); }

.contact-form-wrap {
    background: var(--white);
    padding: 32px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
}
.contact-form-wrap h3 { margin-bottom: 24px; font-size: 1.3rem; }
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.contact-form-wrap input,
.contact-form-wrap select,
.contact-form-wrap textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--gray-200);
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
    margin-bottom: 16px;
    background: var(--white);
}
.contact-form-wrap input:focus,
.contact-form-wrap select:focus,
.contact-form-wrap textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

/* ===== Footer ===== */
.footer {
    background: var(--secondary);
    color: rgba(255,255,255,0.7);
    padding: 60px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-col h4 {
    color: var(--white);
    margin-bottom: 16px;
    font-size: 1rem;
}
.footer-col p { font-size: 0.9rem; line-height: 1.6; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--white); }
.contact-info li i { width: 20px; margin-right: 8px; color: var(--primary); }
.footer-bottom {
    text-align: center;
    padding: 24px 0;
    font-size: 0.85rem;
}

/* ===== Mobile ===== */
@media (max-width: 968px) {
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .product-cards { grid-template-columns: 1fr; max-width: 500px; margin: 0 auto; }
    .product-gallery-specs { grid-template-columns: 1fr; }
    .about-grid { grid-template-columns: 1fr; }
    .values-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    .hero { padding: 120px 0 60px; }
    .section-header h2 { font-size: 1.6rem; }
    .hamburger { display: block; }
    .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--gray-200);
        box-shadow: var(--shadow);
    }
    .nav-menu.active { display: flex; }
    .dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        padding-left: 16px;
    }
    .dropdown:hover .dropdown-menu { display: none; }
    .dropdown.active .dropdown-menu { display: block; }
    .why-grid { grid-template-columns: 1fr; }
    .values-grid { grid-template-columns: 1fr; }
    .contact-info-cards { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .about-stats { grid-template-columns: 1fr 1fr; }
    .specs-table td { font-size: 0.85rem; }
    .specs-table td:first-child { width: 40%; }
    .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 1.6rem; }
    .feature-grid { grid-template-columns: 1fr; }
    .navbar .container { height: 60px; }
    .logo { font-size: 1.3rem; }
}