/* ==========================================
   「綠意午茶」智慧點餐機 - 全域樣式與變數
   ========================================== */
:root {
    /* 色彩系統 */
    --primary: #00b894;         /* 鮮翠綠 */
    --primary-glow: rgba(0, 184, 148, 0.35);
    --secondary: #0984e3;       /* 清新藍 */
    --accent: #fdcb6e;          /* 亮金黃 */
    --danger: #d63031;          /* 警示紅 */
    
    /* 飲品專屬漸層背景 */
    --tea-red-grad: linear-gradient(135deg, #ff7675, #d63031);
    --tea-green-grad: linear-gradient(135deg, #55efc4, #00b894);
    --tea-milk-grad: linear-gradient(135deg, #ffeaa7, #fdcb6e);

    /* 暗色玻璃擬態主視覺 */
    --bg-app: radial-gradient(circle at top right, #1e272e, #0f172a);
    --card-bg: rgba(30, 41, 59, 0.75);
    --card-hover-bg: rgba(51, 65, 85, 0.85);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover-color: rgba(0, 184, 148, 0.5);

    /* 字型顏色 */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    /* 陰影與圓角 */
    --radius-lg: 20px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow-glow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 初始化與基礎樣式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Outfit', 'Noto Sans TC', sans-serif;
    background: var(--bg-app);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    padding: 20px;
}

/* 應用程式容器 */
.app-container {
    width: 100%;
    max-width: 1280px;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-glow);
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 30px;
    animation: fadeIn 0.8s ease-out;
}

/* 頂部標題區 */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-icon {
    font-size: 2.2rem;
    color: var(--primary);
    filter: drop-shadow(0 0 10px var(--primary-glow));
    animation: pulse 2s infinite alternate;
}

.logo-text h1 {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: 2px;
    background: linear-gradient(135deg, #fff, var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-text p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.header-status {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 184, 148, 0.1);
    padding: 8px 16px;
    border-radius: 50px;
    border: 1px solid rgba(0, 184, 148, 0.2);
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--primary);
}

.status-text {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--primary);
}

/* 主要內容分欄 */
.main-content {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 30px;
}

@media (max-width: 992px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

/* 通用面板卡片 */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    transition: var(--transition-smooth);
}

.panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.panel-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 5px;
}

.step-badge {
    background: var(--primary);
    color: #1e272e;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    font-size: 0.85rem;
    box-shadow: 0 0 10px var(--primary-glow);
}

.panel-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

/* 飲料選擇網格 */
.drinks-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

@media (max-width: 576px) {
    .drinks-grid {
        grid-template-columns: 1fr;
    }
}

.drink-card {
    background: rgba(30, 41, 59, 0.5);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: center;
    cursor: pointer;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    transition: var(--transition-smooth);
}

.drink-card:hover {
    background: var(--card-hover-bg);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
}

.drink-card.active {
    background: rgba(0, 184, 148, 0.08);
    border-color: var(--primary);
    box-shadow: 0 0 20px var(--primary-glow);
}

/* 飲料卡片圖片樣式 */
.drink-image-container {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--border-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.25);
    transition: var(--transition-smooth);
    margin-bottom: 5px;
}

.drink-card.active .drink-image-container {
    border-color: var(--primary);
    box-shadow: 0 0 15px var(--primary-glow);
    transform: scale(1.05);
}

.drink-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.drink-card:hover .drink-img {
    transform: scale(1.1);
}

.drink-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
}

.drink-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.price-tag {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--accent);
}

.select-indicator {
    position: absolute;
    top: 10px;
    right: 10px;
    color: var(--primary);
    font-size: 1.1rem;
    opacity: 0;
    transform: scale(0.5);
    transition: var(--transition-smooth);
}

.drink-card.active .select-indicator {
    opacity: 1;
    transform: scale(1);
}

/* 客製化調整區 */
.custom-options {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.option-group {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.options-selector {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

@media (max-width: 576px) {
    .options-selector {
        grid-template-columns: repeat(2, 1fr);
    }
}

.option-btn {
    background: rgba(30, 41, 59, 0.5);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-smooth);
}

.option-btn:hover {
    background: rgba(51, 65, 85, 0.7);
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.15);
}

.option-btn.active {
    background: var(--primary);
    color: #1e272e;
    font-weight: bold;
    border-color: var(--primary);
    box-shadow: 0 4px 15px var(--primary-glow);
}

/* 暱稱輸入欄位樣式 */
.nickname-input-container {
    position: relative;
    display: flex;
    align-items: center;
}

.nickname-input-container input {
    width: 100%;
    background: rgba(30, 41, 59, 0.5);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 14px 16px 14px 44px;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition-smooth);
}

.nickname-input-container input::placeholder {
    color: var(--text-muted);
}

.nickname-input-container input:focus {
    border-color: var(--primary);
    background: rgba(30, 41, 59, 0.8);
    box-shadow: 0 0 15px var(--primary-glow);
}

.nickname-input-container .input-icon {
    position: absolute;
    left: 16px;
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: var(--transition-smooth);
}

.nickname-input-container input:focus + .input-icon {
    color: var(--primary);
}

/* 歷史訂單暱稱標籤樣式 */
.order-nickname {
    font-size: 0.75rem;
    background: rgba(9, 132, 227, 0.15);
    color: #74b9ff;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 500;
}

/* 數量選擇器樣式 */
.quantity-selector-container {
    display: flex;
    align-items: center;
    gap: 16px;
    background: rgba(30, 41, 59, 0.3);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    width: fit-content;
}

.quantity-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 0.85rem;
    transition: var(--transition-smooth);
    outline: none;
}

.quantity-btn:hover {
    background: var(--primary);
    color: #1e272e;
    border-color: var(--primary);
    box-shadow: 0 0 10px var(--primary-glow);
}

.quantity-btn:active {
    transform: scale(0.9);
}

.quantity-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
    min-width: 24px;
    text-align: center;
    user-select: none;
}

/* 歷史訂單數量標籤樣式 */
.order-quantity-badge {
    font-size: 0.75rem;
    background: rgba(253, 203, 110, 0.15);
    color: var(--accent);
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: bold;
}

/* 結帳面板 */
.checkout-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.9));
    border: 1px solid var(--border-color);
    padding: 24px 30px;
    border-radius: var(--radius-lg);
}

@media (max-width: 768px) {
    .checkout-panel {
        flex-direction: column;
        gap: 20px;
        align-items: stretch;
        text-align: center;
    }
}

.summary-details {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.summary-item {
    font-size: 0.9rem;
}

.summary-label {
    color: var(--text-secondary);
}

.summary-value {
    color: var(--primary);
    font-weight: bold;
}

.total-price-box {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.price-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.price-num {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--accent);
    text-shadow: 0 0 15px rgba(253, 203, 110, 0.3);
}

.submit-btn {
    background: linear-gradient(135deg, #00b894, #0984e3);
    border: none;
    color: #fff;
    padding: 16px 36px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 8px 25px rgba(0, 184, 148, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: var(--transition-smooth);
}

.submit-btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 30px rgba(0, 184, 148, 0.45);
    background: linear-gradient(135deg, #00d2a0, #0a8ffd);
}

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

/* 右側歷史訂單 */
.history-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-height: 700px;
}

.history-icon {
    color: var(--accent);
}

.history-list-wrapper {
    flex: 1;
    overflow-y: auto;
    padding-right: 5px;
}

/* 客製化滾動條 */
.history-list-wrapper::-webkit-scrollbar {
    width: 6px;
}

.history-list-wrapper::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 10px;
}

.history-list-wrapper::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

.history-list-wrapper::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.order-history-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    animation: slideIn 0.4s ease-out forwards;
    transition: var(--transition-smooth);
}

.order-history-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.15);
    transform: scale(1.01);
}

.order-info {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.order-title-box {
    display: flex;
    align-items: center;
    gap: 10px;
}

.order-drink-name {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--text-primary);
}

.order-specs {
    font-size: 0.8rem;
    background: rgba(255, 255, 255, 0.08);
    padding: 2px 8px;
    border-radius: 4px;
    color: var(--text-secondary);
}

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

.order-price {
    font-weight: 800;
    font-size: 1.15rem;
    color: var(--accent);
}

/* 讀取中旋轉圈 */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 40px 0;
    color: var(--text-secondary);
}

.loading-spinner i {
    font-size: 2rem;
    color: var(--primary);
}

/* 空狀態 */
.empty-orders {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.empty-orders i {
    font-size: 2.5rem;
    color: var(--text-muted);
}

/* Toast 提示訊息 */
.toast-notification {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(30, 41, 59, 0.95);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 14px 28px;
    border-radius: 50px;
    font-weight: 500;
    box-shadow: var(--shadow-glow);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.3s;
}

.toast-notification.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast-notification.success {
    border-color: var(--primary);
}

.toast-notification.success i {
    color: var(--primary);
}

.toast-notification.error {
    border-color: var(--danger);
}

.toast-notification.error i {
    color: var(--danger);
}

/* ==========================================
   動畫效果集 (Animations)
   ========================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes pulse {
    from {
        transform: scale(1);
        filter: drop-shadow(0 0 5px var(--primary-glow));
    }
    to {
        transform: scale(1.05);
        filter: drop-shadow(0 0 15px var(--primary-glow));
    }
}