/* THERAPEUTIC SUCTION CUPS - 2025 DESIGN */
:root {
    --primary: #2563EB; --primary-dark: #1D4ED8; --primary-light: #3B82F6;
    --accent: #22C55E; --accent-dark: #16A34A;
    --text-primary: #1E293B; --text-secondary: #475569; --text-muted: #64748B;
    --bg-primary: #FFFFFF; --bg-secondary: #F8FAFC; --bg-tertiary: #F1F5F9;
    --border: #E2E8F0; --shadow: rgba(15, 23, 42, 0.08); --shadow-lg: rgba(15, 23, 42, 0.12);
    --font-primary: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
    --spacing-xs: 0.5rem; --spacing-sm: 1rem; --spacing-md: 1.5rem; --spacing-lg: 2.5rem; --spacing-xl: 4rem;
    --radius-sm: 8px; --radius-md: 12px; --radius-lg: 16px;
    --transition-fast: 0.15s ease; --transition-base: 0.25s ease; --transition-slow: 0.4s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-primary); color: var(--text-primary); background: var(--bg-primary); line-height: 1.6; -webkit-font-smoothing: antialiased; }

h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.2; color: var(--text-primary); }
h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.875rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 1.875rem); }
p { line-height: 1.7; color: var(--text-secondary); }
strong { font-weight: 600; color: var(--text-primary); }

.container { max-width: 1280px; margin: 0 auto; padding: 0 var(--spacing-md); }
section { padding: var(--spacing-xl) 0; }
.section-title { text-align: center; margin-bottom: var(--spacing-lg); position: relative; }
.section-title::after { content: ''; display: block; width: 60px; height: 4px; background: linear-gradient(90deg, var(--primary), var(--accent)); margin: var(--spacing-sm) auto 0; border-radius: 2px; }

/* === NAVIGATION === */
.navbar { position: sticky; top: 0; z-index: 1000; background: rgba(255, 255, 255, 0.98); backdrop-filter: blur(10px); box-shadow: 0 2px 12px var(--shadow); transition: all var(--transition-base); }
.navbar.scrolled { box-shadow: 0 4px 20px var(--shadow-lg); }
.nav-container { display: flex; justify-content: space-between; align-items: center; padding: var(--spacing-sm) var(--spacing-md); }
.nav-logo { text-decoration: none; display: flex; align-items: center; }
.logo-text { font-size: 1.25rem; font-weight: 700; background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav-menu { display: flex; list-style: none; gap: var(--spacing-lg); align-items: center; margin: 0; }
.nav-item { margin: 0; }
.nav-link { text-decoration: none; color: var(--text-primary); font-weight: 500; padding: var(--spacing-xs) var(--spacing-sm); border-radius: var(--radius-sm); transition: all var(--transition-fast); }
.nav-link:hover { color: var(--primary); background: var(--bg-secondary); }
.nav-cta { background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: white; padding: var(--spacing-xs) var(--spacing-md); border-radius: var(--radius-md); }
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 4px 12px var(--shadow); background: linear-gradient(135deg, var(--primary-dark), var(--primary)); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: var(--spacing-xs); }
.hamburger { display: block; width: 28px; height: 2px; background: var(--text-primary); position: relative; transition: all var(--transition-base); }
.hamburger::before, .hamburger::after { content: ''; position: absolute; width: 28px; height: 2px; background: var(--text-primary); transition: all var(--transition-base); }
.hamburger::before { top: -8px; }
.hamburger::after { top: 8px; }
.nav-toggle.active .hamburger { background: transparent; }
.nav-toggle.active .hamburger::before { transform: rotate(45deg); top: 0; }
.nav-toggle.active .hamburger::after { transform: rotate(-45deg); top: 0; }

.cta-button { display: inline-block; padding: 1rem 2rem; font-size: 1rem; font-weight: 600; text-decoration: none; border-radius: var(--radius-md); transition: all var(--transition-base); cursor: pointer; border: none; position: relative; overflow: hidden; }
.cta-button::before { content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent); transition: left 0.5s ease; }
.cta-button:hover::before { left: 100%; }
.cta-button.primary { background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: white; box-shadow: 0 4px 12px var(--shadow); }
.cta-button.primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px var(--shadow-lg); }
.cta-button.secondary { background: white; color: var(--primary); border: 2px solid var(--primary); }
.cta-button.secondary:hover { background: var(--primary); color: white; transform: translateY(-2px); }

.hero-section { background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%); padding: var(--spacing-xl) 0; min-height: 90vh; display: flex; align-items: center; }
.hero-section .container { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); align-items: center; }
.hero-content { padding-right: var(--spacing-lg); }
.hero-title { margin-bottom: var(--spacing-md); background: linear-gradient(135deg, var(--text-primary), var(--primary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-subtitle { font-size: 1.125rem; margin-bottom: var(--spacing-lg); color: var(--text-secondary); }
.hero-placeholder { width: 100%; height: 500px; background: linear-gradient(135deg, #E2E8F0 0%, #CBD5E1 100%); border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; position: relative; }
.hero-placeholder::after { content: 'Cupping Therapy'; position: absolute; color: var(--text-muted); font-weight: 500; }

.value-section { background: white; padding: var(--spacing-xl) 0; }
.value-content { max-width: 800px; margin: 0 auto; text-align: center; }
.value-content h2 { margin-bottom: var(--spacing-md); }
.value-text { font-size: 1.125rem; margin-bottom: var(--spacing-lg); }

.audience-section { background: var(--bg-secondary); }
.audience-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: var(--spacing-lg); margin-top: var(--spacing-lg); }
.audience-card { background: white; padding: var(--spacing-lg); border-radius: var(--radius-lg); box-shadow: 0 2px 8px var(--shadow); transition: all var(--transition-base); text-align: center; }
.audience-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px var(--shadow-lg); }
.audience-icon { width: 80px; height: 80px; margin: 0 auto var(--spacing-md); border-radius: 50%; background: linear-gradient(135deg, var(--primary-light), var(--primary)); }
.audience-icon.professional { background: linear-gradient(135deg, #3B82F6, #2563EB); }
.audience-icon.athlete { background: linear-gradient(135deg, #22C55E, #16A34A); }
.audience-icon.home { background: linear-gradient(135deg, #8B5CF6, #7C3AED); }
.audience-card h3 { margin-bottom: var(--spacing-sm); }

.grids-section { background: white; }
.grid-block { margin-bottom: var(--spacing-xl); }
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--spacing-lg); margin-top: var(--spacing-lg); }
.product-card { background: white; border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; transition: all var(--transition-base); cursor: pointer; }
.product-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px var(--shadow-lg); border-color: var(--primary); }
.product-image { width: 100%; height: 220px; background: linear-gradient(135deg, #F1F5F9, #E2E8F0); display: flex; align-items: center; justify-content: center; color: var(--text-muted); font-weight: 500; }
.product-content { padding: var(--spacing-md); }
.product-name { font-size: 1.25rem; font-weight: 600; margin-bottom: var(--spacing-xs); }
.product-description { font-size: 0.9375rem; color: var(--text-secondary); margin-bottom: var(--spacing-md); }
.product-link { display: inline-flex; align-items: center; color: var(--primary); font-weight: 600; text-decoration: none; transition: all var(--transition-fast); }
.product-link:hover { color: var(--primary-dark); }
.product-link::after { content: '→'; margin-left: 0.25rem; transition: margin-left var(--transition-fast); }
.product-link:hover::after { margin-left: 0.5rem; }

.education-section { background: var(--bg-secondary); }
.education-section .container { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-xl); align-items: center; }
.education-content h2 { margin-bottom: var(--spacing-md); }
.education-content p { font-size: 1.125rem; margin-bottom: var(--spacing-lg); }
.education-placeholder { width: 100%; height: 400px; background: linear-gradient(135deg, #E2E8F0, #CBD5E1); border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; position: relative; }
.education-placeholder::after { content: 'Anatomy Diagram'; color: var(--text-muted); font-weight: 500; }

.blog-section { background: white; }
.blog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(350px, 1fr)); gap: var(--spacing-lg); margin-top: var(--spacing-lg); }
.blog-card { background: white; border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; transition: all var(--transition-base); }
.blog-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px var(--shadow-lg); }
.blog-image { width: 100%; height: 200px; background: linear-gradient(135deg, #F1F5F9, #E2E8F0); display: flex; align-items: center; justify-content: center; color: var(--text-muted); font-weight: 500; }
.blog-content { padding: var(--spacing-md); }
.blog-title { font-size: 1.375rem; margin-bottom: var(--spacing-sm); }
.blog-excerpt, .blog-extended { color: var(--text-secondary); margin-bottom: var(--spacing-sm); line-height: 1.7; }
.blog-extended.hidden { display: none; }
.read-toggle { color: var(--primary); font-weight: 600; background: none; border: none; cursor: pointer; padding: 0; margin-bottom: var(--spacing-sm); transition: color var(--transition-fast); }
.read-toggle:hover { color: var(--primary-dark); }
.blog-link { display: inline-flex; align-items: center; color: var(--primary); font-weight: 600; text-decoration: none; transition: all var(--transition-fast); }
.blog-link:hover { color: var(--primary-dark); }
.blog-link::after { content: '→'; margin-left: 0.25rem; transition: margin-left var(--transition-fast); }
.blog-link:hover::after { margin-left: 0.5rem; }

.faq-section { background: var(--bg-secondary); }
.faq-accordion { max-width: 800px; margin: var(--spacing-lg) auto 0; }
.faq-item { background: white; border-radius: var(--radius-md); margin-bottom: var(--spacing-md); overflow: hidden; box-shadow: 0 2px 8px var(--shadow); }
.faq-question { width: 100%; display: flex; justify-content: space-between; align-items: center; padding: var(--spacing-md); background: white; border: none; cursor: pointer; font-size: 1.125rem; font-weight: 600; color: var(--text-primary); text-align: left; transition: all var(--transition-base); }
.faq-question:hover { background: var(--bg-secondary); }
.faq-icon { font-size: 1.5rem; font-weight: 300; color: var(--primary); transition: transform var(--transition-base); }
.faq-question[aria-expanded="true"] .faq-icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height var(--transition-slow); }
.faq-answer p { padding: 0 var(--spacing-md) var(--spacing-md); line-height: 1.7; }
.faq-item.active .faq-answer { max-height: 500px; }

.cta-section { background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: white; }
.cta-content { text-align: center; max-width: 700px; margin: 0 auto; }
.cta-content h2 { color: white; margin-bottom: var(--spacing-md); }
.cta-content p { font-size: 1.125rem; color: rgba(255, 255, 255, 0.9); margin-bottom: var(--spacing-lg); }
.cta-buttons { display: flex; gap: var(--spacing-md); justify-content: center; flex-wrap: wrap; }
.cta-section .cta-button.primary { background: white; color: var(--primary); }
.cta-section .cta-button.primary:hover { background: var(--bg-secondary); }
.cta-section .cta-button.secondary { background: transparent; color: white; border-color: white; }
.cta-section .cta-button.secondary:hover { background: white; color: var(--primary); }

.footer { background: var(--text-primary); color: white; padding: var(--spacing-lg) 0; }
.footer-content { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--spacing-md); }
.footer p { color: rgba(255, 255, 255, 0.8); }
.footer-nav { display: flex; gap: var(--spacing-md); }
.footer-nav a { color: rgba(255, 255, 255, 0.8); text-decoration: none; transition: color var(--transition-fast); }
.footer-nav a:hover { color: white; }

.hidden { display: none; }

@media (max-width: 968px) {
    .nav-toggle { display: block; }
    .nav-menu { position: absolute; top: 100%; left: 0; right: 0; background: white; flex-direction: column; gap: 0; padding: var(--spacing-md) 0; box-shadow: 0 4px 20px var(--shadow-lg); transform: translateY(-100%); opacity: 0; visibility: hidden; transition: all var(--transition-base); }
    .nav-menu.active { transform: translateY(0); opacity: 1; visibility: visible; }
    .nav-item { width: 100%; text-align: center; }
    .nav-link { display: block; padding: var(--spacing-sm) var(--spacing-md); }
    .nav-cta { margin: var(--spacing-sm) var(--spacing-md); display: inline-block; }
    .hero-section .container, .education-section .container { grid-template-columns: 1fr; }
    .hero-content { padding-right: 0; text-align: center; }
    .hero-placeholder { height: 350px; }
    .product-grid, .blog-grid { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
    section { padding: var(--spacing-lg) 0; }
}

@media (max-width: 640px) {
    .audience-grid, .product-grid, .blog-grid { grid-template-columns: 1fr; }
    .cta-buttons { flex-direction: column; }
    .cta-button { width: 100%; }
    .footer-content { flex-direction: column; text-align: center; }
    .footer-nav { flex-direction: column; align-items: center; }
}