/* ==========================================================================
   INSTITUTO DERMA90 — STYLES
   ========================================================================== */

/* Variables de color */
:root {
    /* Neutrales */
    --color-black: #1a1a1a;
    --color-gray-dark: #4a4a4a;
    --color-gray-medium: #757575;
    --color-beige: #f5f3f0;
    --color-white: #fafaf9;
    
    /* Acento Terracota */
    --color-primary: #c67856;
    --color-primary-dark: #a25f42;
    --color-primary-light: #f4e8e2;
    
    /* Secundarios */
    --color-gold: #b8945f;
    --color-green-tea: #8a9b7a;
    
    /* Estados */
    --color-success: #6b7f5e;
    --color-error: #c85a54;
    
    /* Tipografía */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 17px;
    --line-height-base: 1.6;
    
    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transiciones */
    --transition: all 0.3s ease;
}

/* Reset y base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-black);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Contenedor */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Tipografía */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 3rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2.5rem;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* Botones */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(198, 120, 86, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-secondary:hover {
    background-color: var(--color-primary-light);
}

.btn-large {
    padding: 1.25rem 3rem;
    font-size: 1.125rem;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: white;
    border-bottom: 1px solid #e5e5e5;
    z-index: 1000;
    transition: var(--transition);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-prefix {
    font-size: 0.65rem;
    font-weight: 300;
    color: var(--color-gray-medium);
    letter-spacing: 0.5px;
}

.logo-main {
    font-size: 1.375rem;
    font-weight: 500;
    color: var(--color-black);
    letter-spacing: 2px;
}

.nav {
    display: flex;
    gap: var(--spacing-md);
}

.nav a {
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--color-gray-dark);
}

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

/* Sticky Bar */
.sticky-bar {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background-color: var(--color-primary-light);
    padding: 0.75rem 0;
    text-align: center;
    font-size: 0.95rem;
    z-index: 999;
    display: none;
}

.sticky-bar.visible {
    display: block;
}

.sticky-bar-icon {
    margin-right: 0.5rem;
}

.sticky-bar-cta {
    margin-left: 1rem;
    color: var(--color-primary-dark);
    font-weight: 500;
}

.sticky-bar-cta:hover {
    text-decoration: underline;
}

/* Secciones */
.section {
    padding: var(--spacing-xl) 0;
}

.section-alt {
    background-color: var(--color-beige);
}

.section-cta {
    background-color: var(--color-primary-light);
}

.section-final {
    background-color: var(--color-primary-dark);
    color: white;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-md);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-intro {
    text-align: center;
    font-size: 1.125rem;
    color: var(--color-gray-dark);
    max-width: 700px;
    margin: 0 auto var(--spacing-md);
}

.section-text {
    font-size: 1.0625rem;
    color: var(--color-gray-dark);
}

.section-text.max-width {
    max-width: 700px;
    margin: 0 auto;
}

.section-footer {
    text-align: center;
    font-size: 1.125rem;
    font-weight: 500;
    margin-top: var(--spacing-lg);
}

.text-center {
    text-align: center;
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 70px;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    margin-bottom: var(--spacing-md);
}

.hero-text {
    font-size: 1.125rem;
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-md);
}

.hero-badge {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--color-primary-light);
    border: 1px solid var(--color-primary);
    border-radius: 8px;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.hero-scroll {
    margin-top: var(--spacing-lg);
    font-size: 2rem;
    color: var(--color-gray-medium);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.card {
    background-color: white;
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    text-align: center;
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.card h3 {
    margin-bottom: var(--spacing-xs);
}

.card p {
    font-size: 0.95rem;
    color: var(--color-gray-dark);
}

/* Timeline */
.timeline {
    max-width: 600px;
    margin: var(--spacing-lg) auto;
    padding: var(--spacing-md) 0;
}

.timeline-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    border-left: 2px solid var(--color-gray-medium);
    padding-left: var(--spacing-md);
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 1.5rem;
    width: 10px;
    height: 10px;
    background-color: var(--color-gray-medium);
    border-radius: 50%;
}

.timeline-item-active {
    border-left-color: var(--color-primary);
}

.timeline-item-active::before {
    background-color: var(--color-primary);
}

.timeline-year {
    font-weight: 600;
    min-width: 100px;
}

.timeline-desc {
    color: var(--color-gray-dark);
}

/* Pillars Grid */
.pillars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.pillar {
    background-color: white;
    padding: var(--spacing-md);
    border-radius: 12px;
}

.pillar-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.pillar h3 {
    margin-bottom: var(--spacing-sm);
}

.pillar ul {
    list-style: none;
    padding-left: 0;
}

.pillar li {
    padding: 0.25rem 0;
    color: var(--color-gray-dark);
}

.pillar li::before {
    content: '• ';
    color: var(--color-primary);
    font-weight: bold;
}

/* Ingredients Grid */
.ingredients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.ingredient-card {
    background-color: white;
    padding: var(--spacing-md);
    border-radius: 12px;
    border: 1px solid #e5e5e5;
    text-align: center;
}

.ingredient-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.ingredient-card h4 {
    margin-bottom: var(--spacing-xs);
}

.ingredient-dose {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.ingredient-card p {
    font-size: 0.9rem;
    color: var(--color-gray-dark);
}

.ingredient-badge {
    display: inline-block;
    margin-top: var(--spacing-sm);
    padding: 0.25rem 0.75rem;
    background-color: var(--color-primary-light);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-primary-dark);
}

/* Test Badge */
.test-badge {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: white;
    border-radius: 8px;
    font-weight: 500;
    margin: var(--spacing-md) 0;
}

/* Benefits List */
.benefits-list {
    list-style: none;
    margin: var(--spacing-md) 0;
}

.benefits-list li {
    padding: 0.5rem 0;
    font-size: 1rem;
}

/* Trust Grid */
.trust-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.trust-item {
    text-align: center;
    padding: var(--spacing-md);
}

.trust-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.trust-item h4 {
    margin-bottom: var(--spacing-xs);
}

.trust-item p {
    font-size: 0.95rem;
    color: var(--color-gray-dark);
}

/* Stock Counter */
.stock-counter {
    font-size: 1.5rem;
    text-align: center;
    padding: var(--spacing-md);
    background-color: rgba(255,255,255,0.1);
    border-radius: 8px;
    margin: var(--spacing-md) 0;
}

.stock-counter strong {
    color: var(--color-primary-light);
    font-size: 2rem;
}

.section-final .stock-counter strong {
    color: white;
}

.payment-options {
    text-align: center;
    font-size: 0.95rem;
    margin-top: var(--spacing-sm);
    opacity: 0.8;
}

/* Footer */
.footer {
    background-color: var(--color-black);
    color: var(--color-gray-medium);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

.footer-logo .logo-prefix {
    color: var(--color-gray-medium);
}

.footer-logo .logo-main {
    color: white;
}

.footer-year {
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.footer h4 {
    color: white;
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
}

.footer ul {
    list-style: none;
}

.footer li {
    margin-bottom: 0.5rem;
}

.footer a {
    color: var(--color-gray-medium);
    font-size: 0.95rem;
}

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

.footer-legal {
    border-top: 1px solid #333;
    padding-top: var(--spacing-md);
    font-size: 0.85rem;
}

.footer-small {
    font-size: 0.75rem;
    line-height: 1.5;
    margin: var(--spacing-sm) 0;
}

.footer-disclaimer {
    font-size: 0.8rem;
    line-height: 1.5;
    margin: var(--spacing-md) 0;
    padding: var(--spacing-sm);
    background-color: rgba(255,255,255,0.05);
    border-radius: 4px;
}

.footer-copyright {
    text-align: center;
    margin-top: var(--spacing-md);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .hero {
        min-height: 90vh;
        padding-top: 100px;
    }
    
    .nav {
        gap: var(--spacing-sm);
    }
    
    .nav a {
        font-size: 0.85rem;
    }
    
    .btn-large {
        padding: 1rem 2rem;
        font-size: 1rem;
    }
    
    .cards-grid,
    .pillars-grid,
    .ingredients-grid,
    .trust-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .logo-main {
        font-size: 1.125rem;
    }
    
    .sticky-bar {
        font-size: 0.8rem;
        padding: 0.5rem 0;
    }
}