/* Reset e configurações básicas */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --ibm-blue: #0f62fe;
    --ibm-blue-dark: #0043ce;
    --ibm-blue-light: #4589ff;
    --text-primary: #161616;
    --text-secondary: #525252;
    --background: #ffffff;
    --background-alt: #f4f4f4;
    --border-color: #e0e0e0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-alt);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: var(--ibm-blue);
    color: white;
    padding: 2rem 0;
    box-shadow: var(--shadow);
}

header h1 {
    font-size: 1.8rem;
    font-weight: 600;
    letter-spacing: -0.5px;
}

/* Main Content */
main {
    padding: 3rem 0;
}

.intro {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem;
    background-color: var(--background);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.intro h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.intro p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
}

/* Studies Grid */
.studies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.study-card {
    background-color: var(--background);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

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

.study-icon {
    width: 60px;
    height: 60px;
    background-color: var(--ibm-blue-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.study-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.study-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.3;
}

.study-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    flex-grow: 1;
    font-size: 1rem;
    line-height: 1.6;
}

.study-meta {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.badge {
    background-color: var(--background-alt);
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--ibm-blue);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: background-color 0.3s ease, transform 0.2s ease;
    border: none;
    cursor: pointer;
}

.download-btn:hover {
    background-color: var(--ibm-blue-dark);
    transform: scale(1.02);
}

.download-btn:active {
    transform: scale(0.98);
}

.download-btn svg {
    width: 20px;
    height: 20px;
}

/* Footer */
footer {
    background-color: var(--text-primary);
    color: white;
    padding: 2rem 0;
    text-align: center;
    margin-top: 3rem;
}

footer p {
    margin: 0.5rem 0;
    opacity: 0.9;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.4rem;
    }

    .intro h2 {
        font-size: 2rem;
    }

    .intro p {
        font-size: 1rem;
    }

    .studies-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .study-card {
        padding: 1.5rem;
    }

    .study-card h3 {
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    header {
        padding: 1.5rem 0;
    }

    main {
        padding: 2rem 0;
    }

    .intro {
        padding: 1.5rem;
    }

    .intro h2 {
        font-size: 1.6rem;
    }

    .download-btn {
        width: 100%;
        padding: 0.9rem 1.2rem;
    }
}

/* Animações */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.study-card {
    animation: fadeIn 0.6s ease-out;
}

.study-card:nth-child(1) {
    animation-delay: 0.1s;
}

.study-card:nth-child(2) {
    animation-delay: 0.2s;
}

.study-card:nth-child(3) {
    animation-delay: 0.3s;
}

/* Made with Bob */