:root {
    --primary: #0284c7;
    --primary-hover: #0369a1;
    --primary-light: #e0f2fe;
    --active-tab-bg: #0284c7;
    --success: #16a34a;
    --danger: #dc2626;
    --danger-bg: #fef2f2;
    --danger-border: #fca5a5;
    --dark-btn: #0f172a;
    --dark-btn-hover: #1e293b;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #0f172a;
    --text-sub: #64748b;
    --border-color: #e2e8f0;
    --input-border: #cbd5e1;
}

* { 
    box-sizing: border-box; 
    -webkit-tap-highlight-color: transparent; 
}

body {
    margin: 0; padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
}

.main-content {
    padding-bottom: 90px;
    min-height: 100vh;
}

.tab-panel {
    display: none;
    padding: 12px;
    max-width: 650px;
    margin: 0 auto;
}

.tab-panel.active {
    display: block;
    animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 統一卡片模組 */
.card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 16px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
    border: 1px solid var(--border-color);
    margin-bottom: 16px;
}

/* 卡片標題 */
.card h2 {
    margin: 0 0 14px 0;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
}

.form-group { margin-bottom: 14px; }

label.title {
    display: block; 
    font-size: 0.88rem; 
    font-weight: 700; 
    color: var(--text-sub); 
    margin-bottom: 8px;
}

/* 時間輸入框佈局 */
.time-input-container {
    display: flex;
    flex-direction: column;
    gap: 10px; 
    margin-bottom: 14px;
}

.time-input-parts {
    display: flex; 
    align-items: center; 
    gap: 6px;
}

select, input {
    width: 100%; 
    padding: 10px 12px; 
    border: 1.5px solid var(--input-border);
    border-radius: 10px; 
    font-size: 0.92rem; 
    background: #f8fafc;
    color: var(--text-main); 
    outline: none; 
    transition: border 0.2s;
}

textarea {
    width: 100% !important;
    max-width: 100% !important;
    height: 80px !important;
    padding: 10px 12px;
    border: 1.5px solid var(--input-border);
    border-radius: 10px;
    font-size: 0.92rem;
    background: #f8fafc;
    color: var(--text-main);
    outline: none;
    resize: none !important;
    box-sizing: border-box;
}

select:focus, input:focus, textarea:focus {
    border-color: var(--primary); 
    background: #fff;
}

.checkbox-group {
    display: flex; 
    gap: 10px; 
    margin-top: 8px; 
    margin-bottom: 12px;
}

.btn-check-label {
    flex: 1; 
    display: flex; 
    align-items: center; 
    justify-content: center;
    background: #f1f5f9; 
    border: 1.5px solid var(--border-color);
    border-radius: 8px; 
    padding: 10px 0; 
    font-size: 0.85rem; 
    font-weight: 600;
    color: var(--text-sub); 
    cursor: pointer; 
    user-select: none; 
    transition: all 0.2s;
}

input[type="checkbox"] { display: none; }

input[type="checkbox"]:checked + .btn-check-label {
    background: #e0f2fe; 
    color: var(--primary); 
    border-color: var(--primary); 
    font-weight: 700;
}

/* 通用按鈕 UI 系統 */
.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 42px;
    padding: 8px 12px;
    border-radius: 10px;
    font-size: 0.88rem;
    font-weight: 700;
    border: 1.5px solid transparent;
    cursor: pointer;
    user-select: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: center;
    line-height: 1.3;
    white-space: normal;
    margin-bottom: 8px;
}

.btn:last-child {
    margin-bottom: 0;
}

.btn:active {
    transform: scale(0.98);
    opacity: 0.9;
}

.btn-action-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 8px;
    margin-bottom: 8px;
}

/* 主要行動按鈕 */
.btn-primary {
    background: var(--primary);
    color: #ffffff;
    box-shadow: 0 3px 10px rgba(2, 132, 199, 0.2);
}
.btn-primary:hover {
    background: var(--primary-hover);
}

/* 莊嚴立極按鈕 */
.btn-dark {
    background: linear-gradient(135deg, var(--dark-btn), #334155);
    color: #ffffff;
    box-shadow: 0 3px 10px rgba(15, 23, 42, 0.15);
}
.btn-dark:hover {
    background: linear-gradient(135deg, var(--dark-btn-hover), #475569);
}

/* 清除/危險按鈕 */
.btn-danger-soft {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1.5px solid var(--danger-border);
}
.btn-danger-soft:hover {
    background: #fde8e8;
}

/* 小型控制按鈕 */
.btn-sm {
    min-height: 32px;
    padding: 4px 10px;
    font-size: 0.78rem;
    border-radius: 6px;
    font-weight: 600;
    width: auto;
    margin-bottom: 0;
}

.btn-secondary-soft {
    background: #f1f5f9;
    color: #334155;
    border: 1.5px solid var(--border-color);
}

.btn-primary-soft {
    background: var(--primary-light);
    color: var(--primary);
    border: 1.5px solid #bae6fd;
}

/* 平板與電腦端適應 */
@media (min-width: 500px) {
    .time-input-container {
        display: grid;
        grid-template-columns: 1.4fr 1fr;
    }
    .btn-action-group {
        flex-direction: row;
    }
    .btn-action-group .btn {
        margin-bottom: 0;
    }
}

/* 九宮格樣式 */
.jiugong-grid { 
    display: grid; 
    grid-template-columns: repeat(3, 1fr); 
    gap: 6px; 
    background: #cbd5e1; 
    border: 2px solid #cbd5e1; 
    border-radius: 12px; 
    margin-top: 10px; 
    overflow: hidden;
}

.jiugong-cell { 
    background: #fff; 
    padding: 6px; 
    display: flex; 
    flex-direction: column; 
    justify-content: flex-start; 
    align-items: center; 
    box-sizing: border-box;
    min-height: 130px;
}

.cell-title { 
    font-size: 11px; 
    font-weight: 800; 
    color: var(--text-sub); 
    border-bottom: 2px solid var(--bg-color); 
    width: 100%; 
    text-align: center; 
    padding-bottom: 3px; 
    margin-bottom: 4px; 
    flex-shrink: 0; 
}
.cell-content { font-size: 11px; width: 100%; text-align: left; line-height: 1.35; color: var(--text-main); word-wrap: break-word; flex-grow: 1; }
.cell-god-tag { background: #e0f2fe; color: #0284c7; padding: 1px 4px; border-radius: 4px; font-size: 10px; font-weight: bold; display: inline-block; margin-bottom: 3px; }

.god-info-block { margin-bottom: 6px; border-left: 3px solid var(--primary); padding-left: 5px; padding-bottom: 4px; }
.god-info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; font-size: 10.5px; }
.god-info-gan { margin-top: 3px; font-size: 10.5px; }

/* 模式提示條 */
.mode-badge {
    font-size: 0.78rem;
    padding: 8px 10px;
    border-radius: 8px;
    text-align: center;
    margin-bottom: 12px;
    font-weight: 600;
    line-height: 1.4;
}
.mode-research { background: #f1f5f9; color: #475569; border: 1px dashed #cbd5e1; }
.mode-intent { background: #f0fdf4; color: #166534; border: 1px solid #86efac; }

/* 問事 Group 卡片 UI */
.group-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 16px;
    margin-bottom: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}

.group-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
    margin-bottom: 12px;
}

.group-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary);
}

.group-time-info {
    font-size: 0.78rem;
    color: var(--text-sub);
    margin-top: 4px;
    line-height: 1.4;
}

.group-actions {
    display: flex;
    gap: 6px;
    align-items: center;
}

/* 時辰可折疊選單 (Accordion) */
.time-node {
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: 8px;
    overflow: hidden;
    background: #f8fafc;
}

.time-node-header {
    padding: 10px 14px;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
    background: #f1f5f9;
    transition: background 0.2s;
}

.time-node-header:hover {
    background: #e2e8f0;
}

.time-node-body {
    display: none;
    padding: 12px 14px;
    font-size: 0.88rem;
    line-height: 1.6;
    color: #334155;
    background: #ffffff;
    border-top: 1px solid var(--border-color);
    white-space: pre-line;
}

/* 底部導覽列 */
.bottom-nav {
    position: fixed; 
    bottom: 0; 
    left: 0; 
    right: 0; 
    height: 60px;
    background-color: #ffffff; 
    border-top-left-radius: 18px; 
    border-top-right-radius: 18px;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.05); 
    display: flex;
    justify-content: space-around; 
    align-items: center; 
    z-index: 1000;
}

.nav-item {
    display: flex; 
    flex-direction: column; 
    align-items: center; 
    justify-content: center;
    width: 90px; 
    height: 44px; 
    border-radius: 12px; 
    cursor: pointer; 
    color: var(--text-sub); 
    transition: all 0.2s;
}

.nav-item .label { font-size: 0.85rem; font-weight: 600; }
.nav-item.active { background-color: var(--active-tab-bg); color: #ffffff; }