/* 科学计算器样式 */

:root {
    --primary-color: #6366f1;
    --primary-hover: #818cf8;
    --primary-light: rgba(99, 102, 241, 0.08);
    --primary-light-hover: rgba(99, 102, 241, 0.12);
    --border-color-hover: rgba(99, 102, 241, 0.2);
    --shadow-primary: 0 0 16px rgba(99, 102, 241, 0.15);
}

html, body { height: 100%; overflow-y: auto; overflow-x: hidden; margin: 0; }
body { display: flex; align-items: flex-start; justify-content: center; padding-top: 70px; padding-bottom: 70px; min-height: 100vh; }
.logo-icon { background: linear-gradient(135deg, var(--primary-color) 0%, #4338ca 100%); }
.main-content { width: 100%; max-width: 500px; padding: 20px; z-index: 10; }
.tool-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-xl); overflow: hidden; box-shadow: 0 20px 40px rgba(0,0,0,0.3); }

.calc-display { padding: 20px; background: rgba(0,0,0,0.25); border-bottom: 1px solid var(--border-color); }
.calc-expression { font-size: 14px; color: var(--text-muted); font-family: var(--font-mono); min-height: 20px; text-align: right; word-break: break-all; }
.calc-result { font-size: 36px; color: var(--text-primary); font-family: var(--font-mono); font-weight: 300; text-align: right; overflow-x: auto; white-space: nowrap; margin-top: 4px; }

.calc-mode-bar { display: flex; align-items: center; justify-content: flex-end; gap: 8px; padding: 8px 16px; background: rgba(0,0,0,0.1); border-bottom: 1px solid var(--border-color); font-size: 12px; color: var(--text-muted); }
.angle-mode { display: flex; align-items: center; gap: 4px; cursor: pointer; }
.angle-mode input { accent-color: var(--primary-color); cursor: pointer; }

.calc-buttons { padding: 12px; }
.calc-row { display: flex; gap: 6px; margin-bottom: 6px; }
.calc-row:last-child { margin-bottom: 0; }

.calc-btn {
    flex: 1; padding: 14px 6px; border: 1px solid var(--border-color); border-radius: var(--radius-md);
    background: rgba(255,255,255,0.04); color: var(--text-primary); font-size: 16px; cursor: pointer;
    transition: 0.15s; font-family: var(--font-mono); text-align: center;
}
.calc-btn:hover { background: rgba(255,255,255,0.1); }
.calc-btn:active { transform: scale(0.96); }

.calc-num { background: rgba(255,255,255,0.06); }
.calc-num:hover { background: rgba(255,255,255,0.12); }
.calc-op { color: var(--primary-color); background: var(--primary-light); border-color: var(--border-color-hover); }
.calc-op:hover { background: var(--primary-light-hover); }
.calc-func { font-size: 13px; color: var(--text-secondary); }
.calc-func:hover { color: var(--text-primary); }
.calc-action { color: var(--primary-color); font-weight: 600; }
.calc-equals { background: var(--primary-color); color: #fff; }
.calc-equals:hover { background: var(--primary-hover); }

@media (max-width: 480px) {
    .main-content { padding: 10px; }
    .calc-btn { padding: 12px 4px; font-size: 14px; }
    .calc-func { font-size: 11px; }
    .calc-result { font-size: 28px; }
}