/* ==========================================
   全域樣式與變數 (極簡好懂且具高級質感)
   ========================================== */
:root {
    --primary: #6366f1; /* 現代紫靛色 */
    --primary-hover: #4f46e5;
    --primary-light: #e0e7ff;
    --bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
    --card-bg: rgba(255, 255, 255, 0.85);
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --border-color: rgba(229, 231, 235, 0.8);
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.04);
    --shadow-strong: 0 20px 40px rgba(99, 102, 241, 0.12);
    --radius-lg: 20px;
    --radius-md: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Outfit', 'Noto Sans TC', sans-serif;
    background: var(--bg-gradient);
    color: var(--text-main);
    min-height: 100vh;
    padding: 2rem 1rem;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

/* 主容器 */
.app-container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
}

/* 頂部標題 */
header {
    text-align: center;
    margin-bottom: 2.5rem;
    animation: fadeInDown 0.8s ease;
}

.logo {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    display: inline-block;
    animation: pulse 2s infinite;
}

header h1 {
    font-size: 2.2rem;
    font-weight: 800;
    background: linear-gradient(to right, #6366f1, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1rem;
    letter-spacing: 1px;
}

/* 響應式雙欄佈局 */
.grid-layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 2rem;
}

@media (max-width: 900px) {
    .grid-layout {
        grid-template-columns: 1fr;
    }
}

/* 高級毛玻璃卡片 */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-strong);
    transform: translateY(-2px);
}

.card h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    position: relative;
    padding-left: 0.8rem;
    color: #111827;
}

.card h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 15%;
    height: 70%;
    width: 4px;
    background: var(--primary);
    border-radius: 4px;
}

/* 表單元件 */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.6rem;
    color: #374151;
}

input[type="text"], textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-main);
    transition: var(--transition);
}

input[type="text"]:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

/* 飲料卡片網格 */
.drink-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 0.8rem;
}

.drink-btn {
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem 0.5rem;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.drink-btn:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
    transform: scale(1.03);
}

.drink-btn.active {
    border-color: var(--primary);
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.1);
}

.drink-icon {
    font-size: 1.8rem;
}

.drink-title {
    font-size: 0.9rem;
}

/* 按鈕群組 (甜度、冰塊) */
.option-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.option-btn {
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem 0.9rem;
    cursor: pointer;
    font-size: 0.85rem;
    font-family: inherit;
    transition: var(--transition);
}

.option-btn:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.option-btn.active {
    border-color: var(--primary);
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}

/* 提交按鈕 */
.submit-btn {
    width: 100%;
    padding: 1rem;
    border: none;
    border-radius: var(--radius-md);
    background: linear-gradient(to right, #6366f1, #a855f7);
    color: #fff;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
    filter: brightness(1.05);
}

.submit-btn:active {
    transform: translateY(1px);
}

/* 讀取動畫與載入狀態 */
.loader {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s linear infinite;
}

/* 訂單看板 */
.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.list-header h2 {
    margin-bottom: 0;
}

.refresh-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: var(--transition);
}

.refresh-btn:hover {
    background: #fff;
    color: var(--primary);
    border-color: var(--primary);
}

.refresh-btn:active .refresh-icon {
    transform: rotate(180deg);
}

.refresh-icon {
    transition: transform 0.4s ease;
}

.orders-container {
    min-height: 350px;
    max-height: 600px;
    overflow-y: auto;
    padding-right: 0.2rem;
}

/* 捲軸美化 */
.orders-container::-webkit-scrollbar {
    width: 6px;
}

.orders-container::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, 0.1);
    border-radius: 10px;
}

/* 狀態訊息 */
.status-message {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 1rem;
    color: var(--text-muted);
    text-align: center;
    gap: 1rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 1s linear infinite;
}

.empty-icon {
    font-size: 3rem;
}

/* 訂單列表與訂單卡片 */
.orders-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.order-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.4s ease;
}

.order-card:hover {
    border-color: var(--primary-light);
    box-shadow: 0 4px 15px rgba(0,0,0,0.03);
    transform: translateX(2px);
}

.order-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.6rem;
}

.cust-name {
    font-weight: 700;
    color: #111827;
    font-size: 1.05rem;
}

.order-time {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.order-details {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 0.6rem;
}

.badge {
    padding: 0.25rem 0.6rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-drink {
    background: #e0e7ff;
    color: #4f46e5;
}

.badge-sweet {
    background: #fef3c7;
    color: #d97706;
}

.badge-ice {
    background: #e0f2fe;
    color: #0284c7;
}

.order-notes {
    font-size: 0.85rem;
    color: #4b5563;
    background: #f9fafb;
    padding: 0.5rem 0.8rem;
    border-radius: 6px;
    border-left: 3px solid #d1d5db;
}

/* Toast 通知系統 */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: #1f2937;
    color: #fff;
    padding: 0.8rem 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    font-size: 0.9rem;
    font-weight: 600;
    animation: slideInRight 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-left: 4px solid var(--primary);
}

/* 輔助 class */
.hidden {
    display: none !important;
}

/* ==========================================
   動畫效果 (強烈加分項目)
   ========================================== */
@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}