:root {
    --primary-color: #ff6b81;
    --period-color: #ff4757;
    --period-bg: #ffdfe4;
    --fertile-color: #1e90ff;
    --fertile-bg: #e4f1fe;
    --ovulation-color: #2ed573;
    --ovulation-bg: #e0f7e9;
    --next-period-color: #ffa502;
    --bg-color: #f5f7fa;
    --text-color: #2f3542;
    --border-color: #dfe4ea;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container { max-width: 1000px; margin: 0 auto; padding: 20px; }

header { text-align: center; margin-bottom: 30px; }
header h1 { color: var(--primary-color); }
header p { color: #747d8c; font-size: 14px; }

.grid-layout { display: grid; grid-template-columns: 320px 1fr; gap: 20px; }

.card {
    background: white; padding: 20px; border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05); margin-bottom: 20px;
}

.form-group { margin-bottom: 15px; }
label { display: block; margin-bottom: 5px; font-weight: bold; font-size: 14px; }
input {
    width: 100%; padding: 10px; border: 1px solid var(--border-color);
    border-radius: 6px; font-size: 14px;
}

button {
    width: 100%; padding: 12px; border: none; border-radius: 6px;
    font-size: 16px; cursor: pointer; font-weight: bold; margin-bottom: 10px;
}
.btn-primary { background: var(--primary-color); color: white; }
.btn-primary:hover { background: #ff4757; }
.btn-danger { background: white; color: #ff4757; border: 1px solid #ff4757; }
.btn-icon { width: auto; padding: 5px 15px; background: transparent; border: 1px solid var(--border-color); color: var(--text-color); }

.status-card h3 { border-bottom: 1px solid var(--border-color); padding-bottom: 10px; margin-bottom: 15px; }
.status-item { margin-bottom: 10px; font-size: 14px; }
.status-item span { font-weight: bold; }

.calendar-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; }
.calendar-legend { display: flex; gap: 15px; margin-bottom: 20px; flex-wrap: wrap; font-size: 13px; }
.legend-item { display: flex; align-items: center; gap: 5px; }
.dot { width: 12px; height: 12px; border-radius: 50%; display: inline-block; }

.dot.period { background: var(--period-color); }
.dot.fertile { background: var(--fertile-color); }
.dot.ovulation { background: var(--ovulation-color); }
.dot.next-period { background: var(--next-period-color); }

.calendar-grid { border: 1px solid var(--border-color); border-radius: 8px; overflow: hidden; }
.weekdays { display: grid; grid-template-columns: repeat(7, 1fr); background: #f1f2f6; text-align: center; font-weight: bold; padding: 10px 0; border-bottom: 1px solid var(--border-color); }
.days { display: grid; grid-template-columns: repeat(7, 1fr); }

.day-cell { min-height: 80px; padding: 5px; border-right: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); position: relative; }
.day-cell:nth-child(7n) { border-right: none; }
.day-cell.other-month { background: #fafafa; color: #ced6e0; }
.day-number { font-weight: bold; font-size: 14px; margin-bottom: 5px; }

/* 日历标签样式 */
.tag { font-size: 11px; padding: 2px 4px; border-radius: 4px; margin-bottom: 2px; display: block; text-align: center; font-weight: bold; }
.tag.period { background: var(--period-bg); color: var(--period-color); }
.tag.fertile { background: var(--fertile-bg); color: var(--fertile-color); }
.tag.ovulation { background: var(--ovulation-bg); color: var(--ovulation-color); }
.tag.next-period { background: #fff3cd; color: var(--next-period-color); }
.day-cell.today { outline: 2px solid var(--primary-color); outline-offset: -2px; }

@media (max-width: 768px) {
    .grid-layout { grid-template-columns: 1fr; }
    .day-cell { min-height: 60px; }
    .tag { font-size: 10px; padding: 1px; }
}