:root {
    --brand: #101b93;
    --brand-dark: #00084f;
    --brand-soft: #eef8ea;
    --surface: #ffffff;
    --surface-muted: #f7faf6;
    --text-main: #252631;
    --text-soft: #6b767a;
    --border-soft: rgba(59, 52, 155, 0.12);
    --shadow-soft: 0 14px 34px rgba(29, 24, 57, 0.08);
}

body {
    min-height: 100vh;
    font-family: "Segoe UI", Tahoma, sans-serif;
    background:
        radial-gradient(circle at top, rgba(8, 2, 73, 0.16), transparent 26%),
        linear-gradient(180deg, #f6f7fc 0%, #ebeef7 100%);
    color: var(--text-main);
}

.navbar {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.page-shell {
    padding: 2.5rem 0 3rem;
}

.page-hero {
    background: linear-gradient(135deg,
            rgba(63, 155, 52, 0.14), rgba(52, 54, 155, 0.04));
    border: 1px solid var(--border-soft);
    border-radius: 1.5rem;
    box-shadow: var(--shadow-soft);
    padding: 2rem;
    margin-bottom: 1.75rem;
}

.module-card,
.summary-card {
    border: 1px solid var(--border-soft);
    border-radius: 1.25rem;
    background: var(--surface);
    box-shadow: var(--shadow-soft);
}

.module-card .card-header,
.summary-card .card-header {
    background: transparent;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: 1.15rem 1.25rem 0.75rem;
}

.summary-card .metric-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--brand-dark);
    line-height: 1;
}

.btn {
    border-radius: 0.85rem;
    font-weight: 600;
}

.btn-success {
    background-color: var(--brand);
    border-color: var(--brand);
}

.btn-success:hover {
    background-color: var(--brand-dark);
}

.form-control,
.form-select {
    border-radius: 0.85rem;
    border: 1px solid rgba(37, 38, 49, 0.12);
    padding: 0.8rem 0.95rem;
}

.empty-state {
    border: 1px dashed rgba(26, 114, 186, 0.28);
    border-radius: 1rem;
    background: var(--surface-muted);
    padding: 2rem;
    text-align: center;
    color: var(--text-soft);
}

footer {
    background-color: var(--brand);
}

@media (max-width: 768px) {
    .page-shell {
        padding-top: 1.5rem;
    }

    .page-hero {
        padding: 1.5rem;
    }
}

/* Ajustes responsivos para móviles */
@media (max-width: 768px) {
    .container {
        padding-left: 15px;
        padding-right: 15px;
    }

    .page-shell {
        padding-top: 1.5rem;
    }

    .page-hero {
        padding: 1.5rem;
    }

    .display-4 {
        font-size: 2rem;
    }

    .display-6 {
        font-size: 1.5rem;
    }

    .btn {
        font-size: 0.9rem;
        padding: 0.5rem 0.8rem;
    }

    .d-flex.gap-2 {
        gap: 0.5rem !important;
    }
}

@media (max-width: 576px) {
    .card-body {
        padding: 1rem;
    }

    .modal-dialog {
        margin: 0.5rem;
    }
}