/* ── 科学计算器工具页 ── */

/* 计算器外框 */
.sci-wrapper {
    max-width: 480px;
    margin: 0 auto;
    background: #f8f9fb;
    border: 1px solid #e8eaf0;
    border-radius: 12px;
    padding: 1.2rem;
}

/* 角度/弧度模式 */
.sci-mode {
    display: flex;
    gap: 1.2rem;
    margin-bottom: 0.8rem;
    padding: 0 0.2rem;
}

.mode-label {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.85rem;
    color: #555;
    cursor: pointer;
    user-select: none;
}

.mode-label input[type="radio"] {
    accent-color: #2563eb;
}

/* 显示屏 */
.sci-display {
    background: #1a1a2e;
    border-radius: 8px;
    padding: 1rem 1.2rem;
    margin-bottom: 1rem;
    min-height: 90px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    overflow: hidden;
}

.sci-expr {
    color: #8888aa;
    font-size: 0.85rem;
    text-align: right;
    min-height: 1.2em;
    font-family: 'Fira Code', monospace;
    word-break: break-all;
}

.sci-screen {
    color: #fff;
    font-size: 2rem;
    font-weight: 600;
    text-align: right;
    font-family: 'Fira Code', monospace;
    line-height: 1.2;
    word-break: break-all;
}

/* 按键网格：5列 */
.sci-keys {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.4rem;
}

.sk {
    padding: 0.7rem 0.2rem;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
    font-family: inherit;
    user-select: none;
}

.sk:active { transform: scale(0.95); }

.sk.num {
    background: #fff;
    color: #333;
    border: 1px solid #e8eaf0;
}
.sk.num:hover { background: #f0f0f0; }

.sk.sci {
    background: #eef2ff;
    color: #2563eb;
    border: 1px solid #d4daf0;
    font-size: 0.85rem;
}
.sk.sci:hover { background: #dde4ff; }

.sk.func {
    background: #e8eaf0;
    color: #555;
}
.sk.func:hover { background: #d8dae0; }

.sk.op {
    background: #2563eb;
    color: #fff;
}
.sk.op:hover { background: #1d4ed8; }

.sk.eq {
    background: #059669;
    color: #fff;
}
.sk.eq:hover { background: #047857; }

.sk.zero { grid-column: span 2; }

/* 函数表格 */
.func-table-wrap {
    max-width: 780px;
    margin: 0 auto;
    overflow-x: auto;
}

.func-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.func-table th {
    background: #eef2ff;
    color: #2563eb;
    font-weight: 600;
    padding: 0.7rem 1rem;
    text-align: left;
    border-bottom: 2px solid #d4daf0;
}

.func-table td {
    padding: 0.6rem 1rem;
    border-bottom: 1px solid #f0f0f0;
    color: #444;
}

.func-table tr:hover td {
    background: #fafafa;
}

.func-table sup {
    font-size: 0.7em;
}

/* ── Mobile ── */
@media (max-width: 640px) {
    .sci-wrapper {
        max-width: 100%;
        padding: 0.8rem;
    }

    .sci-screen { font-size: 1.6rem; }

    .sk {
        padding: 0.6rem 0.15rem;
        font-size: 0.85rem;
    }

    .sk.sci { font-size: 0.75rem; }

    .sci-keys { gap: 0.3rem; }
}