/* ========================================
   Longfian Oxygen Website - Main Styles
   Blue & White Theme
   ======================================== */

/* CSS Variables */
:root {
    --primary: #0066CC;
    --primary-dark: #004d99;
    --primary-light: #e6f2ff;
    --secondary: #00a8e8;
    --accent: #00d4aa;
    --white: #ffffff;
    --black: #1a1a2e;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --font-main: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px rgba(0,0,0,0.07);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
    --radius: 8px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-main); color: var(--gray-800); line-height: 1.6; background: var(--white); overflow-x: hidden; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* Header */
.header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); box-shadow: var(--shadow-sm); transition: var(--transition); }
.header.scrolled { box-shadow: var(--shadow); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-text { font-size: 1.5rem; font-weight: 700; color: var(--primary); letter-spacing: -0.5px; }

/* Navigation */
.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-item { position: relative; }
.nav-link { display: flex; align-items: center; gap: 4px; padding: 10px 16px; font-size: 0.875rem; font-weight: 600; color: var(--gray-700); text-transform: uppercase; letter-spacing: 0.5px; border-radius: var(--radius); }
.nav-link:hover, .nav-link.active { color: var(--primary); background: var(--primary-light); }
.nav-arrow { font-size: 0.75rem; transition: transform 0.3s; }
.nav-item:hover .nav-arrow { transform: rotate(180deg); }

/* Dropdown */
.dropdown { position: absolute; top: 100%; left: 0; min-width: 220px; background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow-lg); opacity: 0; visibility: hidden; transform: translateY(10px); transition: var(--transition); padding: 8px 0; }
.nav-item:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-link { display: block; padding: 10px 20px; font-size: 0.875rem; color: var(--gray-700); }
.dropdown-link:hover { background: var(--primary-light); color: var(--primary); }

/* Language Switcher */
.lang-switcher { position: relative; }
.lang-btn { display: flex; align-items: center; gap: 6px; padding: 8px 14px; border: 1px solid var(--gray-300); border-radius: var(--radius); font-size: 0.875rem; font-weight: 500; background: var(--white); cursor: pointer; }
.lang-btn:hover { border-color: var(--primary); }
.lang-dropdown { position: absolute; top: calc(100% + 8px); right: 0; min-width: 160px; background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow-lg); opacity: 0; visibility: hidden; transform: translateY(10px); transition: var(--transition); padding: 8px 0; z-index: 100; }
.lang-switcher:hover .lang-dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.lang-option { display: flex; align-items: center; gap: 10px; padding: 10px 16px; font-size: 0.875rem; }
.lang-option:hover { background: var(--primary-light); color: var(--primary); }
.lang-flag { font-size: 1.1rem; }

/* Mobile Menu Toggle */
.menu-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; cursor: pointer; background: none; border: none; }
.menu-toggle span { display: block; width: 24px; height: 2px; background: var(--gray-800); transition: var(--transition); }

/* Hero Section */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; overflow: hidden; background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--secondary) 100%); }
.hero-overlay { position: absolute; inset: 0; background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="40" r="1.5" fill="rgba(255,255,255,0.08)"/><circle cx="40" cy="80" r="1" fill="rgba(255,255,255,0.06)"/><circle cx="60" cy="60" r="2.5" fill="rgba(255,255,255,0.07)"/></svg>'); background-size: 200px; opacity: 0.5; }
.hero-content { position: relative; z-index: 2; text-align: center; color: var(--white); max-width: 800px; padding: 0 24px; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; padding: 8px 20px; background: rgba(255,255,255,0.15); backdrop-filter: blur(10px); border-radius: 50px; font-size: 0.875rem; font-weight: 500; margin-bottom: 24px; }
.hero-title { font-size: 3.5rem; font-weight: 800; line-height: 1.1; margin-bottom: 20px; text-shadow: 0 2px 20px rgba(0,0,0,0.2); }
.hero-desc { font-size: 1.25rem; line-height: 1.7; margin-bottom: 32px; opacity: 0.9; }
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px; font-size: 0.9375rem; font-weight: 600; border-radius: 50px; transition: var(--transition); cursor: pointer; border: none; }
.btn-primary { background: var(--white); color: var(--primary); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(0,0,0,0.2); }
.btn-outline { background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,0.5); }
.btn-outline:hover { background: var(--white); color: var(--primary); border-color: var(--white); }
.btn-lg { padding: 16px 40px; font-size: 1rem; }

.scroll-indicator { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--white); opacity: 0.7; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 2px; }
.scroll-indicator::after { content: ''; width: 1px; height: 40px; background: linear-gradient(to bottom, var(--white), transparent); animation: scrollPulse 2s infinite; }
@keyframes scrollPulse { 0%, 100% { opacity: 0.5; transform: scaleY(1); } 50% { opacity: 1; transform: scaleY(1.2); } }

/* Section Styles */
.section { padding: 100px 0; }
.section-alt { background: var(--gray-100); }
.section-header { text-align: center; max-width: 640px; margin: 0 auto 60px; }
.section-label { display: inline-block; padding: 6px 16px; background: var(--primary-light); color: var(--primary); font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; border-radius: 50px; margin-bottom: 16px; }
.section-title { font-size: 2.5rem; font-weight: 800; color: var(--gray-900); margin-bottom: 16px; line-height: 1.2; }
.section-subtitle { font-size: 1.125rem; color: var(--gray-600); }

/* About Section */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-image { position: relative; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-xl); }
.about-image img { width: 100%; height: 100%; object-fit: cover; }
.about-badge { position: absolute; bottom: -20px; right: -20px; background: var(--primary); color: var(--white); padding: 20px 30px; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }
.about-badge-number { font-size: 2.5rem; font-weight: 800; line-height: 1; }
.about-badge-text { font-size: 0.875rem; opacity: 0.9; }
.about-content h3 { font-size: 2rem; font-weight: 700; color: var(--gray-900); margin-bottom: 20px; }
.about-content p { color: var(--gray-600); margin-bottom: 24px; font-size: 1.0625rem; line-height: 1.8; }
.about-features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 32px; }
.about-feature { text-align: center; padding: 24px; background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); transition: var(--transition); }
.about-feature:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.about-feature-icon { width: 56px; height: 56px; background: var(--primary-light); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 12px; font-size: 1.5rem; }
.about-feature h4 { font-size: 0.9375rem; font-weight: 700; color: var(--gray-900); margin-bottom: 4px; }
.about-feature p { font-size: 0.8125rem; color: var(--gray-600); margin: 0; }

/* Stats Section */
.stats { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); padding: 80px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; }
.stat-item { text-align: center; color: var(--white); }
.stat-number { font-size: 3.5rem; font-weight: 800; line-height: 1; margin-bottom: 8px; }
.stat-label { font-size: 1rem; opacity: 0.8; text-transform: uppercase; letter-spacing: 1px; }

/* Products Section */
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.product-card { background: var(--white); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); transition: var(--transition); border: 1px solid var(--gray-200); }
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-xl); }
.product-image { position: relative; height: 240px; overflow: hidden; background: var(--gray-100); }
.product-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.product-card:hover .product-image img { transform: scale(1.05); }
.product-badge { position: absolute; top: 16px; left: 16px; padding: 6px 14px; background: var(--accent); color: var(--white); font-size: 0.75rem; font-weight: 700; border-radius: 50px; text-transform: uppercase; }
.product-content { padding: 24px; }
.product-category { font-size: 0.75rem; font-weight: 600; color: var(--primary); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; }
.product-title { font-size: 1.125rem; font-weight: 700; color: var(--gray-900); margin-bottom: 12px; line-height: 1.4; }
.product-desc { font-size: 0.875rem; color: var(--gray-600); margin-bottom: 16px; line-height: 1.6; }
.product-footer { display: flex; align-items: center; justify-content: space-between; padding-top: 16px; border-top: 1px solid var(--gray-200); }
.product-price { font-size: 1.25rem; font-weight: 800; color: var(--primary); }
.product-link { font-size: 0.875rem; font-weight: 600; color: var(--primary); display: flex; align-items: center; gap: 4px; }
.product-link:hover { gap: 8px; }

/* Solutions Section */
.solutions-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.solution-card { position: relative; border-radius: var(--radius-lg); overflow: hidden; height: 400px; }
.solution-card img { width: 100%; height: 100%; object-fit: cover; }
.solution-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.2) 50%, transparent 100%); }
.solution-content { position: absolute; bottom: 0; left: 0; right: 0; padding: 40px; color: var(--white); }
.solution-label { display: inline-block; padding: 4px 12px; background: var(--primary); font-size: 0.6875rem; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; border-radius: 50px; margin-bottom: 12px; }
.solution-title { font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; }
.solution-desc { font-size: 0.9375rem; opacity: 0.85; margin-bottom: 16px; }

/* Pet Section */
.pet-section { background: linear-gradient(135deg, var(--primary-light) 0%, var(--white) 100%); }
.pet-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.pet-content h3 { font-size: 2rem; font-weight: 700; color: var(--gray-900); margin-bottom: 16px; }
.pet-content p { color: var(--gray-600); margin-bottom: 24px; font-size: 1.0625rem; line-height: 1.8; }
.pet-features { display: flex; flex-direction: column; gap: 16px; }
.pet-feature { display: flex; align-items: flex-start; gap: 16px; }
.pet-feature-icon { width: 48px; height: 48px; background: var(--primary); color: var(--white); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.25rem; flex-shrink: 0; }
.pet-feature h4 { font-size: 1rem; font-weight: 700; color: var(--gray-900); margin-bottom: 4px; }
.pet-feature p { font-size: 0.875rem; color: var(--gray-600); margin: 0; }

/* Blog Section */
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.blog-card { background: var(--white); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); transition: var(--transition); border: 1px solid var(--gray-200); }
.blog-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.blog-image { height: 200px; overflow: hidden; }
.blog-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.blog-card:hover .blog-image img { transform: scale(1.05); }
.blog-content { padding: 24px; }
.blog-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; font-size: 0.8125rem; color: var(--gray-500); }
.blog-category { color: var(--primary); font-weight: 600; }
.blog-title { font-size: 1.125rem; font-weight: 700; color: var(--gray-900); margin-bottom: 12px; line-height: 1.4; }
.blog-excerpt { font-size: 0.875rem; color: var(--gray-600); line-height: 1.6; margin-bottom: 16px; }
.blog-link { font-size: 0.875rem; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 4px; }

/* FAQ Section */
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--white); border-radius: var(--radius); border: 1px solid var(--gray-200); overflow: hidden; }
.faq-question { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; cursor: pointer; font-weight: 600; color: var(--gray-900); transition: var(--transition); }
.faq-question:hover { background: var(--gray-50); }
.faq-question::after { content: '+'; font-size: 1.5rem; color: var(--primary); font-weight: 300; transition: transform 0.3s; }
.faq-item.active .faq-question::after { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-item.active .faq-answer { max-height: 500px; }
.faq-answer-inner { padding: 0 24px 20px; color: var(--gray-600); line-height: 1.7; }
.faq-image { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.faq-image img { width: 100%; height: auto; }

/* Contact Section */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.contact-info h3 { font-size: 2rem; font-weight: 700; color: var(--gray-900); margin-bottom: 20px; }
.contact-info > p { color: var(--gray-600); margin-bottom: 32px; font-size: 1.0625rem; }
.contact-items { display: flex; flex-direction: column; gap: 20px; }
.contact-item { display: flex; align-items: flex-start; gap: 16px; }
.contact-item-icon { width: 52px; height: 52px; background: var(--primary-light); color: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.25rem; flex-shrink: 0; }
.contact-item h4 { font-size: 1rem; font-weight: 700; color: var(--gray-900); margin-bottom: 4px; }
.contact-item p { font-size: 0.9375rem; color: var(--gray-600); }
.contact-form { background: var(--white); padding: 40px; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 0.875rem; font-weight: 600; color: var(--gray-700); margin-bottom: 8px; }
.form-input, .form-textarea { width: 100%; padding: 12px 16px; border: 1px solid var(--gray-300); border-radius: var(--radius); font-size: 0.9375rem; font-family: inherit; transition: var(--transition); background: var(--white); }
.form-input:focus, .form-textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
.form-textarea { min-height: 120px; resize: vertical; }

/* Footer */
.footer { background: var(--gray-900); color: var(--gray-400); padding: 80px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 60px; }
.footer-brand .logo-text { color: var(--white); margin-bottom: 16px; }
.footer-brand p { font-size: 0.9375rem; line-height: 1.7; margin-bottom: 24px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a { width: 40px; height: 40px; background: rgba(255,255,255,0.1); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1rem; transition: var(--transition); }
.footer-social a:hover { background: var(--primary); color: var(--white); transform: translateY(-3px); }
.footer-title { font-size: 1rem; font-weight: 700; color: var(--white); margin-bottom: 20px; text-transform: uppercase; letter-spacing: 1px; }
.footer-links { display: flex; flex-direction: column; gap: 12px; }
.footer-links a { font-size: 0.875rem; transition: var(--transition); }
.footer-links a:hover { color: var(--white); padding-left: 4px; }
.footer-contact-item { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 16px; }
.footer-contact-item i { color: var(--primary); margin-top: 3px; }
.footer-contact-item span { font-size: 0.875rem; line-height: 1.5; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 24px 0; display: flex; justify-content: space-between; align-items: center; font-size: 0.8125rem; }
.footer-bottom a { color: var(--gray-500); }
.footer-bottom a:hover { color: var(--white); }

/* Page Header */
.page-header { padding: 160px 0 80px; background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%); color: var(--white); text-align: center; }
.page-header h1 { font-size: 3rem; font-weight: 800; margin-bottom: 16px; }
.page-header p { font-size: 1.125rem; opacity: 0.85; max-width: 600px; margin: 0 auto; }

/* Products Page */
.products-filter { display: flex; justify-content: center; gap: 12px; margin-bottom: 40px; flex-wrap: wrap; }
.filter-btn { padding: 10px 24px; border: 1px solid var(--gray-300); background: var(--white); border-radius: 50px; font-size: 0.875rem; font-weight: 600; color: var(--gray-700); cursor: pointer; transition: var(--transition); }
.filter-btn:hover, .filter-btn.active { background: var(--primary); color: var(--white); border-color: var(--primary); }

/* Admin Styles */
.admin-body { background: var(--gray-100); }
.admin-header { background: var(--white); padding: 16px 24px; display: flex; justify-content: space-between; align-items: center; box-shadow: var(--shadow-sm); position: sticky; top: 0; z-index: 100; }
.admin-sidebar { width: 260px; background: var(--white); min-height: calc(100vh - 64px); border-right: 1px solid var(--gray-200); padding: 24px 0; }
.admin-sidebar-link { display: flex; align-items: center; gap: 12px; padding: 12px 24px; font-size: 0.9375rem; font-weight: 500; color: var(--gray-700); transition: var(--transition); }
.admin-sidebar-link:hover, .admin-sidebar-link.active { background: var(--primary-light); color: var(--primary); }
.admin-main { flex: 1; padding: 32px; }
.admin-card { background: var(--white); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-sm); margin-bottom: 24px; }
.admin-table { width: 100%; border-collapse: collapse; }
.admin-table th, .admin-table td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--gray-200); font-size: 0.875rem; }
.admin-table th { font-weight: 600; color: var(--gray-700); background: var(--gray-50); }
.admin-table tr:hover td { background: var(--gray-50); }
.status-badge { display: inline-block; padding: 4px 12px; border-radius: 50px; font-size: 0.75rem; font-weight: 600; }
.status-active { background: #d4edda; color: #155724; }
.status-inactive { background: #f8d7da; color: #721c24; }
.btn-sm { padding: 8px 16px; font-size: 0.8125rem; }
.btn-danger { background: #dc3545; color: var(--white); }
.btn-danger:hover { background: #c82333; }
.btn-success { background: #28a745; color: var(--white); }
.btn-success:hover { background: #218838; }

/* Login Page */
.login-container { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%); }
.login-box { background: var(--white); padding: 48px; border-radius: var(--radius-lg); box-shadow: var(--shadow-xl); width: 100%; max-width: 420px; }
.login-box h1 { font-size: 1.75rem; font-weight: 700; text-align: center; margin-bottom: 8px; color: var(--gray-900); }
.login-box p { text-align: center; color: var(--gray-600); margin-bottom: 32px; }
.login-logo { text-align: center; margin-bottom: 32px; }
.login-logo .logo-text { font-size: 2rem; justify-content: center; }

/* Responsive */
@media (max-width: 1024px) {
    .about-grid, .pet-grid, .contact-grid, .faq-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .solutions-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .menu-toggle { display: flex; }
    .nav-menu { position: fixed; top: 72px; left: 0; right: 0; background: var(--white); flex-direction: column; padding: 20px; box-shadow: var(--shadow-lg); transform: translateY(-100%); opacity: 0; visibility: hidden; transition: var(--transition); }
    .nav-menu.active { transform: translateY(0); opacity: 1; visibility: visible; }
    .nav-item { width: 100%; }
    .nav-link { padding: 12px 16px; }
    .dropdown { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; padding-left: 20px; display: none; }
    .nav-item:hover .dropdown { display: block; }
    .hero-title { font-size: 2.5rem; }
    .hero-desc { font-size: 1rem; }
    .section { padding: 60px 0; }
    .section-title { font-size: 2rem; }
    .products-grid, .blog-grid, .solutions-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }
    .stat-number { font-size: 2.5rem; }
    .about-features { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
    .page-header h1 { font-size: 2rem; }
    .admin-sidebar { width: 100%; min-height: auto; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2rem; }
    .hero-buttons { flex-direction: column; }
    .btn { width: 100%; justify-content: center; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .contact-form { padding: 24px; }
}

/* Animations */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

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

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--gray-100); }
::-webkit-scrollbar-thumb { background: var(--gray-400); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--gray-500); }