Convert-it/wwwroot/css/site.css

/* ========== TEMA ESCURO PERSONALIZADO ========== */
:root {
    --primary-gradient: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    --box-shadow: 0 8px 32px rgba(0, 123, 255, 0.1);
}

/* ========== LAYOUT PRINCIPAL ========== */
body {
    background: linear-gradient(135deg, #0a1929 0%, #1a2332 100%);
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.navbar {
    background: var(--primary-gradient) !important;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 123, 255, 0.2);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    text-shadow: var(--text-shadow);
}

/* ========== CARDS MODERNOS ========== */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    box-shadow: var(--box-shadow);
    transition: all 0.3s ease;
    border-radius: 1rem;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 123, 255, 0.25);
    border-color: rgba(0, 123, 255, 0.3);
}

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

.card a:hover {
    color: inherit;
}

/* ========== ÍCONES DOS CARDS ========== */
.feature-icon-1 {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 4rem;
    width: 4rem;
    background: var(--primary-gradient) !important;
    box-shadow: 0 8px 16px rgba(0, 123, 255, 0.3);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-icon-1::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: all 0.6s ease;
    transform: rotate(45deg);
    opacity: 0;
}

.card:hover .feature-icon-1::before {
    opacity: 1;
    animation: shimmer 1s ease-in-out;
}

@keyframes shimmer {
    0% { transform: translateX(-100%) rotate(45deg); }
    100% { transform: translateX(100%) rotate(45deg); }
}

/* ========== TÍTULOS E TEXTOS ========== */
.display-4 {
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
    margin-bottom: 1.5rem;
}

.lead {
    font-size: 1.25rem;
    opacity: 0.9;
}

.card h2 {
    font-weight: 700;
    margin-bottom: 1rem;
    color: #ffffff;
}

.card p {
    opacity: 0.85;
    line-height: 1.6;
}

/* ========== DROPDOWN DE IDIOMAS ========== */
.dropdown-toggle {
    background: rgba(255, 255, 255, 0.1) !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.dropdown-toggle:hover {
    background: rgba(255, 255, 255, 0.2) !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.dropdown-menu {
    background: rgba(33, 37, 41, 0.95) !important;
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.dropdown-item {
    transition: all 0.2s ease;
}

.dropdown-item:hover {
    background: rgba(0, 123, 255, 0.2) !important;
    color: #ffffff !important;
}

/* ========== FOOTER ========== */
.footer {
    background: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 100%) !important;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

/* ========== PLACEHOLDERS DE ANÚNCIO ========== */
.ad-placeholder {
    background: rgba(255, 255, 255, 0.05);
    border: 2px dashed rgba(255, 255, 255, 0.1);
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 1rem;
    backdrop-filter: blur(5px);
    transition: all 0.3s ease;
}

.ad-placeholder:hover {
    border-color: rgba(0, 123, 255, 0.3);
    background: rgba(255, 255, 255, 0.08);
}

.ad-top { 
    min-height: 90px; 
    margin-bottom: 2rem; 
}

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

/* ========== RESPONSIVIDADE ========== */
@media (max-width: 768px) {
    .display-4 {
        font-size: 2.5rem;
    }
    
    .lead {
        font-size: 1.1rem;
    }
    
    .card {
        margin-bottom: 1.5rem;
    }
    
    .feature-icon-1 {
        height: 3rem;
        width: 3rem;
    }
}

/* ========== ANIMAÇÕES SUAVES ========== */
* {
    transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.container {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}