/* Reset e Variáveis */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #059669;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --dark-color: #111827;
    --light-color: #f8fafc;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: #374151;
    background-color: #f8fafc;
}

/* Header Moderno */
.navbar-brand {
    font-weight: 800;
    font-size: 1.5rem;
    color: white !important;
}

.navbar {
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(10px);
}

/* Hero Section */
.hero-section {
    background: var(--gradient-primary);
    color: white;
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

    .hero-section::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><circle cx="30" cy="30" r="1"/></g></svg>') repeat;
        animation: float 20s infinite linear;
    }

@keyframes float {
    0% {
        transform: translateY(0px);
    }

    100% {
        transform: translateY(-60px);
    }
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    background: linear-gradient(45deg, #ffffff, #e0e7ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* Badges */
.feature-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    margin: 0.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Layout Principal */
.main-layout {
    margin-top: 2rem;
    margin-bottom: 2rem;
}

/* Menu de Módulos */
.modules-sidebar {
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    padding: 1.5rem;
    height: fit-content;
    position: sticky;
    top: 2rem;
}

.modules-list {
    max-height: 600px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: #cbd5e1 #f1f5f9;
}

    .modules-list::-webkit-scrollbar {
        width: 6px;
    }

    .modules-list::-webkit-scrollbar-track {
        background: #f1f5f9;
        border-radius: 3px;
    }

    .modules-list::-webkit-scrollbar-thumb {
        background: #cbd5e1;
        border-radius: 3px;
    }

        .modules-list::-webkit-scrollbar-thumb:hover {
            background: #94a3b8;
        }

.module-item {
    display: block;
    padding: 1rem;
    margin-bottom: 0.5rem;
    border-radius: 12px;
    border: 2px solid transparent;
    background: #f8fafc;
    color: #374151;
    text-decoration: none;
    transition: all 0.2s ease;
}

    .module-item:hover {
        background: var(--gradient-primary);
        color: white;
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
        border-color: rgba(255, 255, 255, 0.2);
    }

    .module-item.active {
        background: var(--gradient-success);
        color: white;
        box-shadow: var(--shadow-md);
    }

.module-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(59, 130, 246, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.75rem;
    font-size: 1.2rem;
    color: var(--primary-color);
}

.module-item:hover .module-icon {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.module-title {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
}

.module-description {
    font-size: 0.8rem;
    opacity: 0.8;
    line-height: 1.4;
}

.category-header {
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #6b7280;
    margin: 1.5rem 0 0.75rem 0;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #e5e7eb;
}

    .category-header:first-child {
        margin-top: 0;
    }

/* Área do Conversor */
.converter-area {
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    padding: 2rem;
    margin-bottom: 2rem;
}

.converter-card {
    border: none;
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.converter-header {
    background: var(--gradient-primary);
    color: white;
    padding: 2rem;
    text-align: center;
}

.step-indicators {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin: 2rem 0;
}

.step-indicator {
    text-align: center;
    flex: 1;
    max-width: 200px;
}

.step-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-success);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    margin: 0 auto 1rem;
    box-shadow: var(--shadow-md);
}

.step-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

.step-description {
    font-size: 0.9rem;
    color: #6b7280;
}

/* Anúncios Placeholder */
.ad-placeholder {
    background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
    border: 2px dashed #d1d5db;
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    color: #6b7280;
    min-height: 250px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 1rem 0;
}

    .ad-placeholder i {
        font-size: 2rem;
        margin-bottom: 1rem;
        opacity: 0.5;
    }

    .ad-placeholder.banner {
        min-height: 90px;
        flex-direction: row;
        gap: 1rem;
    }

    .ad-placeholder.sidebar {
        min-height: 600px;
        position: sticky;
        top: 2rem;
    }

    .ad-placeholder.rectangle {
        min-height: 250px;
        max-width: 300px;
        margin: 1rem auto;
    }

/* Seção de Benefícios */
.benefits-section {
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    padding: 3rem 2rem;
    margin: 2rem 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-item {
    text-align: center;
    padding: 2rem 1rem;
    border-radius: 16px;
    background: #f8fafc;
    transition: all 0.3s ease;
}

    .feature-item:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-lg);
        background: white;
    }

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: var(--gradient-success);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.5rem;
}

/* Responsivo */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .modules-sidebar {
        margin-bottom: 2rem;
        position: static;
    }

    .modules-list {
        max-height: 300px;
    }

    .step-indicators {
        flex-direction: column;
        gap: 1rem;
    }

    .converter-area {
        padding: 1rem;
    }

    .ad-placeholder.sidebar {
        display: none;
    }
}

@media (min-width: 1200px) {
    .hero-title {
        font-size: 4rem;
    }
}

/* Animações */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.loading-shimmer {
    background: linear-gradient(90deg, #f3f4f6 25%, #e5e7eb 50%, #f3f4f6 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }

    100% {
        background-position: 200% 0;
    }
}

/* Melhorias de Acessibilidade */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus states */
.module-item:focus,
button:focus,
.btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}