body.calc-page {
    min-height: 100vh;
    height: auto;
    background: #f7fbfa;
    color: #22313f;
    user-select: auto;
}

body.calc-page header {
    background: #e8f7f1;
    color: #1f5b49;
}

.calc-shell {
    width: min(100%, 840px);
    margin: 0 auto;
    padding: 16px 16px 20px;
}

.tool-card {
    background: #ffffff;
    border: 1px solid #e3efea;
    border-radius: 12px;
    box-shadow: 0 6px 18px rgba(32, 88, 71, 0.08);
}

.tool-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #def7ec;
    font-size: 1.55rem;
    flex: 0 0 auto;
}

.tool-section h2,
.tool-card h3 {
    margin: 0;
    letter-spacing: 0;
}

.tool-section {
    margin-top: 14px;
}

.back-button {
    min-height: 40px;
    border: 1px solid #d8e8e1;
    border-radius: 999px;
    background: #ffffff;
    color: #1f5b49;
    padding: 8px 15px;
    font: inherit;
    font-size: 0.95rem;
    font-weight: 900;
    cursor: pointer;
    box-shadow: 0 3px 10px rgba(32, 88, 71, 0.08);
}

.back-button:active {
    transform: translateY(1px);
}

.tool-section h2 {
    margin: 0 0 10px;
    color: #4b635b;
    font-size: 0.95rem;
    font-weight: 900;
}

.tool-card {
    display: flex;
    align-items: center;
    gap: 13px;
    padding: 16px;
    color: inherit;
    text-decoration: none;
    -webkit-tap-highlight-color: transparent;
}

.tool-card:active {
    transform: translateY(1px);
    box-shadow: 0 3px 10px rgba(32, 88, 71, 0.12);
}

.tool-content {
    min-width: 0;
    flex: 1 1 auto;
}

.tool-card h3 {
    color: #164937;
    font-size: 1.05rem;
    line-height: 1.35;
}

.tool-card p {
    margin: 6px 0 0;
    color: #5d6d7e;
    font-size: 0.9rem;
    line-height: 1.5;
}

.tool-arrow {
    color: #1f8f6b;
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
    flex: 0 0 auto;
}

@media (min-width: 720px) {
    .calc-shell {
        padding-top: 24px;
    }

    .tool-card {
        padding: 22px;
    }
}