/* ============================================
   ComprasPTY — Light Theme Design System
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
    --color-bg: #fafafa;
    --color-bg-secondary: #ffffff;
    --color-bg-card: #ffffff;
    --color-bg-card-hover: #f8f8fc;
    --color-surface: #f2f2f7;
    --color-border: rgba(0, 0, 0, 0.08);
    --color-border-hover: rgba(0, 0, 0, 0.15);

    --color-text-primary: #1a1a2e;
    --color-text-secondary: #555570;
    --color-text-muted: #8e8ea0;

    --color-accent: #6c5ce7;
    --color-accent-light: #a29bfe;
    --color-accent-glow: rgba(108, 92, 231, 0.15);

    --color-cta: #ff6b35;
    --color-cta-hover: #ff8c5a;
    --color-cta-glow: rgba(255, 107, 53, 0.2);

    --color-success: #00b894;

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06), 0 1px 4px rgba(0, 0, 0, 0.04);
    --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-glow: 0 0 30px var(--color-accent-glow);

    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    display: block;
}

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

/* ---------- Header ---------- */
#site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition-smooth);
}

#site-header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.4rem;
    cursor: pointer;
    transition: var(--transition-fast);
    color: var(--color-text-primary);
}

.logo:hover {
    transform: scale(1.02);
}

.logo-icon {
    font-size: 1.5rem;
}

.logo-accent {
    color: var(--color-cta);
}

#main-nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-cta);
    border-radius: 1px;
    transition: var(--transition-smooth);
}

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

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

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: var(--transition-smooth);
}

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

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Nav */
.mobile-nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 16px 24px;
    flex-direction: column;
    gap: 4px;
    z-index: 999;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-20px);
    opacity: 0;
    transition: var(--transition-smooth);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

.mobile-nav.active {
    transform: translateY(0);
    opacity: 1;
}

.mobile-nav-link {
    display: block;
    padding: 12px 16px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.mobile-nav-link:hover {
    background: var(--color-surface);
    color: var(--color-text-primary);
}

/* ---------- Hero (Condensed) ---------- */
#hero {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 100px 24px 32px;
    background: linear-gradient(180deg, #f0eeff 0%, var(--color-bg) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(108, 92, 231, 0.08);
    border: 1px solid rgba(108, 92, 231, 0.15);
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: 16px;
    animation: fadeInUp 0.5s ease forwards;
}

#hero h1 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
    animation: fadeInUp 0.5s ease 0.08s forwards;
    opacity: 0;
}

.hero-gradient-text {
    background: linear-gradient(135deg, var(--color-cta), var(--color-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.6;
    animation: fadeInUp 0.5s ease 0.16s forwards;
    opacity: 0;
}

/* ---------- Sections Common ---------- */
.section-title {
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    font-weight: 700;
    text-align: center;
    letter-spacing: -0.02em;
    margin-bottom: 6px;
    color: var(--color-text-primary);
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 1rem;
    margin-bottom: 40px;
}

/* ---------- Filter Bar ---------- */
#productos {
    padding: 40px 0 80px;
}

.filter-bar {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 36px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 9px 20px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    color: var(--color-text-secondary);
    font-family: var(--font-family);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
}

.filter-btn:hover {
    border-color: var(--color-border-hover);
    color: var(--color-text-primary);
    background: var(--color-bg-card-hover);
    box-shadow: var(--shadow-card);
}

.filter-btn.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
    box-shadow: 0 4px 14px var(--color-accent-glow);
}

/* ---------- Product Card ---------- */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.product-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-smooth);
    animation: fadeInUp 0.5s ease forwards;
    opacity: 0;
    box-shadow: var(--shadow-card);
}

.product-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-card-hover);
}

.product-image-wrapper {
    position: relative;
    background: #f8f8fa;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px;
    overflow: hidden;
}

.product-badge {
    position: absolute;
    top: 14px;
    left: 14px;
    padding: 4px 12px;
    background: var(--color-accent);
    color: #fff;
    font-size: 0.72rem;
    font-weight: 600;
    border-radius: 50px;
    letter-spacing: 0.02em;
    z-index: 2;
    box-shadow: 0 2px 8px var(--color-accent-glow);
}

.product-image {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.product-card:hover .product-image {
    transform: scale(1.06);
}

.product-info {
    padding: 20px;
}

.product-title {
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 8px;
    color: var(--color-text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-short-desc {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 14px;
}

/* Toggle Review */
.product-review-toggle {
    margin-bottom: 16px;
}

.toggle-review-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    background: none;
    border: none;
    color: var(--color-accent);
    font-family: var(--font-family);
    font-size: 0.83rem;
    font-weight: 500;
    cursor: pointer;
    padding: 4px 0;
    transition: var(--transition-fast);
}

.toggle-review-btn:hover {
    color: var(--color-cta);
}

.chevron-icon {
    transition: var(--transition-smooth);
}

.toggle-review-btn[aria-expanded="true"] .chevron-icon {
    transform: rotate(180deg);
}

.product-review {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), margin 0.3s ease;
    margin-top: 0;
}

.product-review.visible {
    max-height: 600px;
    margin-top: 10px;
}

.product-review p {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    padding: 14px;
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--color-accent);
}

/* CTA Button */
.product-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 13px;
    background: linear-gradient(135deg, var(--color-cta), #e85d2c);
    color: #fff;
    font-size: 0.93rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: var(--transition-smooth);
    box-shadow: 0 4px 14px var(--color-cta-glow);
}

.product-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 22px var(--color-cta-glow);
    filter: brightness(1.06);
}

.affiliate-notice {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    text-align: center;
    margin-top: 8px;
    font-style: italic;
}

/* ---------- Sobre Nosotros ---------- */
#sobre-nosotros {
    padding: 80px 0;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
}

.about-content {
    max-width: 650px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

/* ---------- Cómo Funciona ---------- */
#como-funciona {
    padding: 80px 0;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.step-card {
    position: relative;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    transition: var(--transition-smooth);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.step-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-cta));
    opacity: 0;
    transition: var(--transition-smooth);
}

.step-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-card-hover);
}

.step-card:hover::before {
    opacity: 1;
}

.step-number {
    position: absolute;
    top: 12px;
    right: 16px;
    font-size: 2.8rem;
    font-weight: 800;
    color: rgba(0, 0, 0, 0.04);
    line-height: 1;
}

.step-icon {
    font-size: 2.2rem;
    margin-bottom: 16px;
}

.step-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--color-text-primary);
}

.step-card p {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ---------- Footer ---------- */
#site-footer {
    padding: 56px 0 0;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--color-border);
}

.footer-tagline {
    color: var(--color-text-muted);
    font-size: 0.88rem;
    margin-top: 10px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-links h4 {
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
    margin-bottom: 6px;
}

.footer-links a {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-accent);
}

/* Disclaimer */
.disclaimer {
    margin-top: 40px;
    padding: 28px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.disclaimer h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 14px;
    color: var(--color-text-primary);
}

.disclaimer p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: 8px;
}

.disclaimer p:last-child {
    margin-bottom: 0;
}

.disclaimer strong {
    color: var(--color-text-secondary);
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
    margin-top: 28px;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Card visibility for intersection observer */
.product-card {
    opacity: 0;
}

.product-card.visible {
    animation: fadeInUp 0.5s ease forwards;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
        gap: 20px;
    }
}

@media (max-width: 768px) {
    #main-nav {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-nav {
        display: flex;
    }

    .steps-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .step-card {
        padding: 28px 20px;
    }

    .products-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    #hero {
        padding: 88px 20px 24px;
    }

    .filter-bar {
        gap: 6px;
    }

    .filter-btn {
        padding: 7px 14px;
        font-size: 0.8rem;
    }

    #productos {
        padding: 32px 0 60px;
    }

    #como-funciona,
    #sobre-nosotros {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .header-inner {
        padding: 0 16px;
    }

    .logo {
        font-size: 1.2rem;
    }

    .container {
        padding: 0 16px;
    }

    .products-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .product-image-wrapper {
        padding: 20px;
    }

    #hero {
        padding: 80px 16px 20px;
    }

    #hero h1 {
        font-size: 1.6rem;
    }
}