:root {
    --btn-blue: #1e88e5;
    --btn-blue-hover: #1565c0;
    --btn-blue-active: #0d47a1;
    --btn-blue-secondary: #2f5ea8;
    --btn-blue-secondary-hover: #244a82;
}

body {
    max-width: 100%;
    width: 100%;
}

main {
    width: 100%;
    max-width: 100%;
}

.page-content-right-pad {
    padding-right: 2rem;
}

.btn,
.back-link,
.quiz-nav a,
.quiz-nav button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--btn-blue);
    color: #fff !important;
    border: 1px solid var(--btn-blue-hover);
    border-radius: 6px;
    font-weight: 600;
    font-size: 1rem;
    line-height: 1;
    font-family: inherit;
    text-decoration: none;
    cursor: pointer;
    min-height: 44px;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
    appearance: none;
    -webkit-appearance: none;
    box-sizing: border-box;
}

.btn:hover,
.back-link:hover,
.quiz-nav a:hover,
.quiz-nav button:hover {
    background: var(--btn-blue-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.25);
}

.btn:active,
.back-link:active,
.quiz-nav a:active,
.quiz-nav button:active {
    background: var(--btn-blue-active);
    transform: translateY(0);
    box-shadow: none;
}

.btn.secondary,
.btn-secondary,
.quiz-nav .secondary {
    background: var(--btn-blue-secondary);
    border-color: var(--btn-blue-secondary-hover);
}

.btn.secondary:hover,
.btn-secondary:hover,
.quiz-nav .secondary:hover {
    background: var(--btn-blue-secondary-hover);
}

.btn.block {
    width: 100%;
}

.btn-group {
    display: inline-flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}