/* ==========================================================================
   Design System Variables (Eduvalt LMS adapted with IOL Education Palette)
   ========================================================================== */
:root {
    /* Colors (IOL Palette) */
    --primary-base: #1848D9;
    --primary-hover: #143ca8;
    --primary-light: #7E9BF2;
    --primary-lighter: #EFF6FF; /* Very light blue for backgrounds */
    
    /* Secondary (Eduvalt CTAs) */
    --secondary-base: #F97316;
    --secondary-hover: #EA580C;
    --secondary-light: #FFF7ED;

    /* Backgrounds */
    --bg-default: #FFFFFF;
    --bg-surface: #F2F2F2; /* IOL neutral */
    --bg-dark: #0D0D0D; /* IOL dark */

    /* Text */
    --text-heading: #0D0D0D;
    --text-body: #475569;
    --text-muted: #94A3B8;
    --text-inverse: #FFFFFF;

    /* Typography */
    --font-primary: 'Poppins', sans-serif; /* Headings */
    --font-secondary: 'Inter', sans-serif; /* Body */

    /* Effects */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-pill: 9999px;
    
    --shadow-default: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-floating: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    --transition: all 0.3s ease-in-out;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    color: var(--text-heading);
    line-height: 1.2;
}

h1 { font-size: 3.5rem; font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: 2.5rem; font-weight: 700; }
h3 { font-size: 1.5rem; font-weight: 600; }

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

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 5rem 0;
}

.bg-surface {
    background-color: var(--bg-surface);
}

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

.d-block { display: block; }
.font-bold { font-weight: 700; }

/* ==========================================================================
   Components
   ========================================================================== */

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    border: none;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--primary-base); 
    color: var(--text-inverse);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    color: var(--text-inverse);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary-base);
    color: var(--primary-base);
}

.btn-outline:hover {
    background-color: var(--primary-base);
    color: var(--text-inverse);
}

.btn-block {
    display: block;
    width: 100%;
}

/* Badges */
.badge {
    display: inline-block;
    background-color: var(--primary-lighter);
    color: var(--primary-base);
    border-radius: var(--radius-pill);
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

/* Section Header */
.section-header {
    margin-bottom: 3rem;
}

.subtitle {
    display: block;
    color: var(--primary-base);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.section-desc {
    max-width: 600px;
    margin: 1rem auto 0;
    color: var(--text-muted);
}

/* ==========================================================================
   Layout Sections
   ========================================================================== */

/* Navbar */
.navbar {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid #E2E8F0;
    padding: 1rem 0;
    transition: var(--transition);
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-heading);
    font-weight: 500;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-heading);
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 6rem 0;
    background-color: var(--primary-lighter);
    position: relative;
    overflow: hidden;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    margin-bottom: 1.5rem;
    color: var(--text-heading);
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    color: var(--text-body);
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-image {
    position: relative;
}

.hero-main-img {
    width: 100%;
    max-width: 500px;
    border-radius: var(--radius-lg);
    position: relative;
    z-index: 2;
    box-shadow: var(--shadow-hover);
}

.hero-blob-bg {
    position: absolute;
    width: 400px;
    height: 400px;
    background: var(--primary-light);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
    filter: blur(60px);
    opacity: 0.3;
}

.floating-card {
    position: absolute;
    background: var(--bg-default);
    padding: 1rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-floating);
    display: flex;
    align-items: center;
    gap: 1rem;
    z-index: 3;
    animation: float 4s ease-in-out infinite;
}

.floating-card i {
    color: var(--secondary-base);
}

.floating-card.top-left {
    top: -20px;
    left: -20px;
}

.floating-card.bottom-right {
    bottom: -20px;
    right: -20px;
    animation-delay: 2s;
}

@keyframes float {
    0% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0); }
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    background: var(--bg-default);
    padding: 2.5rem 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid #E2E8F0;
    transition: var(--transition);
}

.feature-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-5px);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background-color: var(--primary-lighter);
    color: var(--primary-base);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
}

/* Certification Section */
.logos-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    margin-bottom: 4rem;
    flex-wrap: wrap;
}

.partner-logo {
    height: 80px;
    object-fit: contain;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
}

.cert-item {
    background: var(--bg-default);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-default);
    text-align: center;
    transition: var(--transition);
}

.cert-item:hover {
    box-shadow: var(--shadow-hover);
}

.cert-item img {
    width: 100%;
    max-width: 300px;
    margin-bottom: 1.5rem;
    border: 1px solid #E2E8F0;
    border-radius: var(--radius-sm);
}

/* Program Modules Accordion */
.modules-accordion {
    max-width: 800px;
    margin: 0 auto;
}

.accordion-item {
    background: var(--bg-default);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    box-shadow: var(--shadow-default);
    overflow: hidden;
}

.accordion-header {
    width: 100%;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font-primary);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-heading);
    text-align: left;
}

.mod-number {
    color: var(--primary-base);
    margin-right: 1rem;
    font-size: 0.875rem;
    background: var(--primary-lighter);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
}

.mod-title {
    flex-grow: 1;
}

.acc-icon {
    transition: transform 0.3s ease;
}

.accordion-header.active .acc-icon {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out, padding 0.3s ease;
    background: #FAFAFA;
}

.accordion-header.active + .accordion-content {
    padding: 0 1.5rem 1.5rem 1.5rem;
    max-height: 500px;
}

.mod-topics {
    margin-top: 1rem;
    list-style-type: disc;
    padding-left: 1.5rem;
    color: var(--text-body);
}

.mod-topics li {
    margin-bottom: 0.5rem;
}

/* Competencies & CTA Section */
.flex-row {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 4rem;
    align-items: center;
}

.competencies-list {
    margin-top: 1.5rem;
}

.competencies-list li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 1.05rem;
}

.competencies-list i {
    color: var(--primary-base);
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.cta-box {
    background: var(--primary-base);
    color: var(--text-inverse);
    padding: 3rem 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-hover);
}

.cta-box h3 {
    color: var(--text-inverse);
    margin-bottom: 1rem;
}

.cta-box p {
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-box .btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

/* Footer */
.footer {
    background-color: var(--bg-dark);
    color: var(--text-muted);
    padding: 4rem 0 0;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    height: 50px;
    margin-bottom: 1rem;
    filter: brightness(0) invert(1);
}

.footer h4 {
    color: var(--text-inverse);
    margin-bottom: 1.5rem;
}

.footer ul li {
    margin-bottom: 0.75rem;
}

.footer ul a {
    color: var(--text-muted);
}

.footer ul a:hover {
    color: var(--text-inverse);
}

.footer ul li i {
    margin-right: 0.5rem;
    vertical-align: middle;
    width: 18px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 1.5rem 0;
}

/* Diferencia Section */
.diferencia-list {
    margin-top: 1.5rem;
}
.diferencia-list li {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    background: var(--bg-default);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-default);
}
.diferencia-list img {
    width: 60px;
    height: 60px;
    object-fit: contain;
    flex-shrink: 0;
}

/* Pricing Section */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

.pricing-card {
    background: var(--bg-default);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    box-shadow: var(--shadow-default);
    border: 1px solid #E2E8F0;
    text-align: center;
    position: relative;
    transition: var(--transition);
}

.pricing-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-5px);
}

.pricing-card.popular {
    border-color: var(--secondary-base);
    box-shadow: 0 10px 25px -5px rgba(249, 115, 22, 0.2);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--secondary-base);
    color: var(--text-inverse);
    padding: 0.25rem 1rem;
    border-radius: var(--radius-pill);
    font-size: 0.875rem;
    font-weight: 600;
}

.pricing-card h3 {
    margin-bottom: 1rem;
    color: var(--text-heading);
}

.price-box {
    margin-bottom: 2rem;
}

.old-price {
    text-decoration: line-through;
    color: var(--text-muted);
    font-size: 1rem;
}

.current-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-base);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.current-price .discount {
    font-size: 0.875rem;
    background: var(--secondary-light);
    color: var(--secondary-base);
    padding: 0.25rem 0.5rem;
    margin-bottom: 0;
    vertical-align: super;
}

.payment-plan {
    color: var(--primary-base);
    font-size: 1.125rem;
    font-weight: 700;
    margin-top: 0.75rem;
    background-color: var(--primary-lighter);
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    display: inline-block;
}

.pricing-features {
    text-align: left;
    margin-top: 1.5rem;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    color: var(--text-body);
}

.pricing-features li i {
    color: var(--primary-base);
    width: 18px;
    height: 18px;
}

.pricing-features li.disabled {
    color: var(--text-muted);
}

.pricing-features li.disabled i {
    color: var(--text-muted);
}

/* Banks Container */
.payment-methods {
    margin-top: 4rem;
}

.banks-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.bank-card {
    background: var(--bg-default);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-default);
    border-left: 4px solid var(--primary-base);
}

.bank-card h4 {
    color: var(--primary-base);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.bank-card p {
    margin-bottom: 0.5rem;
}

/* WhatsApp Floating Button */
.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 40px;
    right: 40px;
    background-color: #25d366;
    color: #FFF;
    border-radius: 50px;
    text-align: center;
    font-size: 30px;
    box-shadow: 2px 2px 3px #999;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.whatsapp-float:hover {
    background-color: #128C7E;
    color: #fff;
    transform: scale(1.1);
}

.whatsapp-float i {
    width: 32px;
    height: 32px;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.skill-card {
    background: var(--bg-default);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-default);
    border-top: 4px solid var(--primary-base);
    transition: var(--transition);
    text-align: left;
}

.skill-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-5px);
}

.skill-icon {
    width: 50px;
    height: 50px;
    background-color: var(--primary-lighter);
    color: var(--primary-base);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.skill-icon i {
    width: 24px;
    height: 24px;
}

.skill-card h4 {
    margin-bottom: 1rem;
    color: var(--text-heading);
    font-size: 1.125rem;
}

.skill-card p {
    color: var(--text-body);
    font-size: 0.95rem;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 992px) {
    h1 { font-size: 2.75rem; }
    h2 { font-size: 2rem; }
    
    .hero-container,
    .flex-row {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-image {
        margin-top: 2rem;
    }
    
    .floating-card {
        display: none; /* Hide floating cards on tablet/mobile for cleaner look */
    }
    
    .features-grid,
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-container {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 1.8rem; line-height: 1.3; }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .nav-links {
        display: none; /* Hide for mobile toggle */
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-default);
        flex-direction: column;
        padding: 1.5rem;
        box-shadow: var(--shadow-default);
        text-align: center;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .features-grid,
    .cert-grid,
    .pricing-grid,
    .banks-container {
        grid-template-columns: 1fr;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero {
        padding: 4rem 0;
    }
}