/* --- 基礎設定與變數 --- */
:root {
    --emerald-500: #10b981;
    --rose-500: #f43f5e;
    --sky-400: #38bdf8;
    --slate-800: #1e293b;
}

body {
    background-color: #f8fafc;
    /* 現代字體棧：優先使用 Inter 與 Noto Sans TC */
    font-family: 'Inter', 'Noto Sans TC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    -webkit-tap-highlight-color: transparent;
    -webkit-font-smoothing: antialiased;
    letter-spacing: -0.011em;
}

/* 鎖定背景捲動：當 Modal 開啟時使用 */
body.no-scroll {
    overflow: hidden !important;
    position: fixed;
    width: 100%;
}

/* --- 玻璃卡片效果 --- */
.glass-card {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(226, 232, 240, 0.7);
}

/* --- 進度條與環形動畫 --- */
.progress-bar {
    transition: width 0.8s cubic-bezier(0.34, 1.56, 0.64, 1), 
                stroke-dashoffset 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* --- 下拉選單核心邏輯 (常用食物 & 營養模板) --- */
.dropdown-content {
    display: none;
    position: absolute;
    width: 100%;
    top: 100%;
    left: 0;
    z-index: 8000; /* 極高層級，確保浮在 Modal 內容之上 */
    max-height: 250px;
    overflow-y: auto !important;
    background: white;
    margin-top: 0.5rem;
    border-radius: 1.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    border: 1px solid #e2e8f0;
    
    /* 隔離捲動事件：防止滑動清單時主背景跟著動 */
    overscroll-behavior: contain !important;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
}

/* 展開狀態控製 */
.dropdown-active .dropdown-content { 
    display: block !important; 
    animation: slideIn 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* 箭頭旋轉動畫 */
.dropdown-active #dropdownArrowIcon,
.dropdown-active #templateArrowIcon {
    transform: rotate(180deg);
}

@keyframes slideIn { 
    from { opacity: 0; transform: translateY(-12px) scale(0.98); } 
    to { opacity: 1; transform: translateY(0) scale(1); } 
}

/* --- 彈窗樣式 (Modals) --- */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    align-items: center;
    justify-content: center;
    padding: 1.25rem;
}
.modal-overlay.active { display: flex; }

/* 日曆彈窗 */
.calendar-modal {
    display: none;
    position: absolute;
    bottom: calc(100% + 15px);
    left: 50%;
    transform: translateX(-50%);
    z-index: 500;
    width: 300px;
    background: white;
    border-radius: 2.25rem;
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.2);
    padding: 1.5rem;
    border: 1px solid rgba(226, 232, 240, 0.8);
    overscroll-behavior: contain;
}
.calendar-modal.active { display: block; animation: popIn 0.35s cubic-bezier(0.17, 0.89, 0.32, 1.28); }

/* --- UI 元件細節 --- */
.action-btn { 
    display: flex; 
    flex-direction: column; 
    align-items: center; 
    justify-content: center;
    padding: 1.25rem 0.5rem; 
    border-radius: 1.75rem; 
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); 
}
.action-btn:active { transform: scale(0.92); }
.action-btn span { font-size: 11px; font-weight: 900; margin-top: 0.6rem; text-transform: uppercase; letter-spacing: 0.05em; }

.modal-input { 
    width: 100%; 
    padding: 1rem 1.25rem; 
    border-radius: 1.25rem; 
    background: #f1f5f9; 
    outline: none; 
    font-weight: 700; 
    border: 2px solid transparent; 
    transition: all 0.25s; 
}
.modal-input:focus { 
    background: white; 
    border-color: #cbd5e1; 
    box-shadow: 0 4px 12px rgba(0,0,0,0.03);
}

.input-label { 
    display: block; 
    font-size: 10px; 
    font-weight: 900; 
    margin-bottom: 0.4rem; 
    text-transform: uppercase; 
    color: #94a3b8; 
    letter-spacing: 0.1em;
    padding-left: 0.2rem;
}

/* 飲水快速按鈕 */
.water-quick-btn { 
    padding: 1rem 0.5rem; 
    border-radius: 1.25rem; 
    background: #f0f9ff; 
    font-weight: 800; 
    color: #0284c7; 
    transition: all 0.2s; 
}
.water-quick-btn:hover { background: #e0f2fe; }

/* 日曆單元格 */
.day-cell { 
    aspect-ratio: 1; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    cursor: pointer; 
    border-radius: 14px; 
    font-size: 0.8rem; 
    font-weight: 700; 
    color: #475569; 
    transition: all 0.2s; 
}
.day-cell:hover:not(.day-other) { background: #f1f5f9; color: var(--emerald-500); }
.day-selected { 
    background: var(--emerald-500) !important; 
    color: white !important; 
    font-weight: 900; 
    box-shadow: 0 8px 16px -4px rgba(16, 185, 129, 0.4); 
}
.day-other { color: #e2e8f0; pointer-events: none; }

/* --- 捲軸美化 --- */
.custom-scrollbar::-webkit-scrollbar { width: 6px; }
.custom-scrollbar::-webkit-scrollbar-track { background: transparent; }
.custom-scrollbar::-webkit-scrollbar-thumb { 
    background: #cbd5e1; 
    border-radius: 10px; 
    border: 2px solid white; 
}

/* --- 動畫定義 --- */
@keyframes popIn { 
    from { opacity: 0; transform: translateX(-50%) translateY(15px) scale(0.92); } 
    to { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); } 
}

@keyframes modalIn { 
    from { opacity: 0; transform: scale(0.92) translateY(30px); } 
    to { opacity: 1; transform: scale(1) translateY(0); } 
}

.animate-modalIn { animation: modalIn 0.45s cubic-bezier(0.16, 1, 0.3, 1) forwards; }

@keyframes fadeIn { 
    from { opacity: 0; transform: translateY(12px); } 
    to { opacity: 1; transform: translateY(0); } 
}
.animate-fadeIn { animation: fadeIn 0.4s ease-out forwards; }

/* 針對 tabular-nums 的支援，確保數字等寬 */
.tabular-nums {
    font-variant-numeric: tabular-nums;
}