/* Calculator (.calc-* + 兼容 .btn) */ .calc-card { padding: 16px 18px; margin-bottom: 14px; } .calc-display { background: linear-gradient(180deg, #1f2937 0%, #111827 100%); border-radius: 8px; padding: 14px 16px; margin-bottom: 12px; color: #fff;
}
.calc-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px;
}
.calc-mode { background: rgba(255, 255, 255, .12); color: #cbd5e1; padding: 3px 10px; border-radius: 999px; font: 600 11px var(--yst-font); letter-spacing: 1.2px;
}
.calc-history-toggle { color: #cbd5e1 !important; border-color: rgba(255,255,255,.2) !important; }
.calc-history-toggle:hover { background: rgba(255,255,255,.08) !important; color: #fff !important; } .calc-screen .expression { font: 14px var(--yst-font-mono, monospace); color: rgba(255, 255, 255, .55); min-height: 18px; text-align: right; margin-bottom: 4px; word-break: break-all;
}
.calc-screen .result { font: 700 32px var(--yst-font-mono, monospace); color: #fff; text-align: right; word-break: break-all;
} /* Buttons grid */
.calc-grid { display: grid; grid-template-columns: repeat(10, 1fr); gap: 6px;
}
.calc-grid .btn { height: 46px; border: 1px solid var(--yst-border); background: var(--yst-bg-subtle); color: var(--yst-text); border-radius: 6px; font: 600 14px var(--yst-font-mono, monospace); cursor: pointer; transition: all .12s; user-select: none;
}
.calc-grid .btn:hover { background: var(--yst-brand-soft); border-color: var(--yst-brand); color: var(--yst-brand); }
.calc-grid .btn:active { transform: translateY(1px); }
.calc-grid .btn.number { background: #fff; color: var(--yst-text);
}
.calc-grid .btn.number:hover { background: var(--yst-brand-soft); }
.calc-grid .btn.operator { background: var(--yst-brand-soft); color: var(--yst-brand); font-weight: 700;
}
.calc-grid .btn.operator:hover { background: var(--yst-brand); color: #fff; }
.calc-grid .btn.equals { background: var(--yst-brand); color: #fff; border-color: var(--yst-brand);
}
.calc-grid .btn.equals:hover { background: #007a72; color: #fff; }
.calc-grid .btn.clear { background: #fee2e2; color: #b91c1c; border-color: #fecaca;
}
.calc-grid .btn.clear:hover { background: #ef4444; color: #fff; }
.calc-grid .btn.zero { grid-column: span 1; } /* History panel */
.history-panel { background: var(--yst-bg-card); border: 1px solid var(--yst-border); border-radius: 10px; padding: 14px 18px; margin-bottom: 14px; display: none; box-shadow: var(--yst-shadow-sm);
}
.history-panel.open { display: block; }
.history-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; padding-bottom: 8px; border-bottom: 1px solid var(--yst-border);
}
.history-header h3 { margin: 0; font: 600 14px var(--yst-font); color: var(--yst-text); }
.history-list { max-height: 280px; overflow-y: auto; display: flex; flex-direction: column; gap: 6px;
}
.history-list .history-item { background: var(--yst-bg-subtle); border: 1px solid var(--yst-border); border-radius: 6px; padding: 8px 12px; font: 12px var(--yst-font-mono, monospace); cursor: pointer; transition: all .15s; color: var(--yst-text-2);
}
.history-list .history-item:hover { background: var(--yst-brand-soft); border-color: var(--yst-brand); }
.no-history { text-align: center; color: var(--yst-text-light); font: 13px var(--yst-font); padding: 20px 0; margin: 0;
} @media (max-width: 768px) { .calc-grid { grid-template-columns: repeat(5, 1fr); } .calc-grid .btn { height: 44px; font-size: 13px; }
}
@media (max-width: 480px) { .calc-grid { grid-template-columns: repeat(4, 1fr); } .calc-screen .result { font-size: 26px; }
}