/* HEADER */
header {
    padding: 2rem 0 3rem 0;
    text-align: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.header-title {
    display: flex;
    justify-content: center;
    font-size: 3rem;
    font-weight: bold;
    color: var(--color-white);
    gap: 0.25rem;
}

.header-subtitle {
    font-size: 1.25rem;
    color: var(--color-gray-200);
    margin-top: 0.50rem;
}

/* MAIN */
main {
    flex: 1;
}

.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* SECTION - STATS */
.stats-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2.5rem;
}

.stat-card {
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.185);
    text-decoration: none;
    color: var(--color-white);
    font-size: 2.25rem;
    font-weight: bold;
    transition: transform 0.3s ease, box-shadow 0.4s ease;
}

.stat-card:hover {
    transform: translateZ(40px) scale(1.05);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.stat-content {
    display: flex;
    justify-content: space-between;
}

.stat-text {
    margin-top: 0.75rem;
    font-size: 1.25rem;
    font-weight: 500;
}

.stat-user {
    background-color: var(--color-blue);
}

.stat-books {
    background-color: var(--color-green);
}

.stat-available {
    background-color: var(--color-purple);
}

.stat-loans {
    background-color: var(--color-orange);
}

/* SECTION - QUICK ACTIONS */
.quick-actions {
    background-color: var(--color-white);
    border-radius: 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    margin: 3rem 0;
    padding: 2rem;
}

.action-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1.25rem;
}

.action-card {
    text-decoration: none;
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.185);
    transition: transform 0.3s ease, box-shadow 0.4s ease;
}

.action-card:hover {
    transform: translateZ(40px) scale(1.05);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.action-card span {
    font-size: 2rem;
}

.action-title {
    font-size: 1.25rem;
    color: var(--color-white);
    margin: 0.25rem 0;
}

.action-description {
    font-size: 1rem;
    color: var(--color-gray-200);
}

.action-users {
    background-color: #155dfb;
}

.action-books {
    background-color: #00a63e;
}

.action-loans {
    background-color: #9810fa;
}