/* ========================================
   CSS Variables & Reset
   ======================================== */
:root {
    --color-primary: #FF6B35;
    --color-primary-dark: #E55A2B;
    --color-secondary: #2C3E50;
    --color-background: #F8F9FA;
    --color-card: #FFFFFF;
    --color-success: #27AE60;
    --color-text: #2C3E50;
    --color-text-light: #7F8C8D;
    --color-border: #E0E0E0;

    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-xxl: 32px;

    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);

    --transition: 0.2s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: var(--color-background);
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
}

#app {
    height: 100%;
    width: 100%;
    position: relative;
}

/* ========================================
   Screen Layout
   ======================================== */
.screen {
    display: none;
    flex-direction: column;
    height: 100%;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background: var(--color-background);
}

.screen.active {
    display: flex;
}

/* ========================================
   Header
   ======================================== */
.header {
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    min-height: 70px;
}

.header h1 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    flex: 1;
    text-align: center;
}

.header .subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-left: var(--spacing-md);
}

#screen-top .header {
    flex-direction: column;
    padding: var(--spacing-xl);
    text-align: center;
}

#screen-top .header h1 {
    font-size: var(--font-size-xxl);
    margin-bottom: var(--spacing-xs);
}

#screen-top .header .subtitle {
    margin-left: 0;
}

/* ========================================
   Buttons
   ======================================== */
.btn-back {
    background: none;
    border: none;
    font-size: var(--font-size-base);
    color: var(--color-primary);
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    min-width: 48px;
    min-height: 48px;
    display: flex;
    align-items: center;
}

.btn-back:active {
    opacity: 0.7;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-lg);
    font-weight: 600;
    padding: var(--spacing-md) var(--spacing-xl);
    min-height: 56px;
    min-width: 48px;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
}

.btn-primary:active {
    background: var(--color-primary-dark);
    transform: scale(0.98);
}

.btn-primary:disabled {
    background: var(--color-border);
    cursor: not-allowed;
}

/* ========================================
   Store Grid (Top Screen)
   ======================================== */
.store-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    overflow-y: auto;
    flex: 1;
}

.store-card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
}

.store-card:active {
    transform: scale(0.98);
    box-shadow: var(--shadow-lg);
}

.store-card-image {
    width: 100%;
    height: 160px;
    object-fit: cover;
    background: var(--color-border);
}

.store-card-info {
    padding: var(--spacing-md);
}

.store-card-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.store-card-categories {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
}

/* ========================================
   Category Tabs
   ======================================== */
.category-tabs {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    overflow-x: auto;
}

.category-tab {
    background: var(--color-background);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    min-height: 48px;
    transition: all var(--transition);
}

.category-tab.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.category-tab:active {
    transform: scale(0.96);
}

/* ========================================
   Menu Grid
   ======================================== */
.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    padding-bottom: 100px; /* カートバー分の余白 */
    overflow-y: auto;
    flex: 1;
}

.menu-card {
    background: var(--color-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.menu-card.unavailable {
    opacity: 0.5;
    pointer-events: none;
}

.menu-card-image {
    width: 100%;
    height: 140px;
    object-fit: cover;
    background: var(--color-border);
}

.menu-card-info {
    padding: var(--spacing-md);
}

.menu-card-name {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.menu-card-description {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.menu-card-price {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-primary);
}

.menu-card-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--spacing-sm);
}

.quantity-control {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.quantity-btn {
    width: 48px;
    height: 48px;
    border: 2px solid var(--color-primary);
    border-radius: 50%;
    background: white;
    color: var(--color-primary);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.quantity-btn:active {
    background: var(--color-primary);
    color: white;
}

.quantity-btn.minus {
    border-color: var(--color-border);
    color: var(--color-text-light);
}

.quantity-btn.minus:active {
    background: var(--color-border);
    color: var(--color-text);
}

.quantity-value {
    font-size: var(--font-size-lg);
    font-weight: 600;
    min-width: 30px;
    text-align: center;
}

/* ========================================
   Cart Bar (Fixed Bottom)
   ======================================== */
.cart-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-card);
    border-top: 1px solid var(--color-border);
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
}

.cart-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-lg);
}

.cart-icon {
    font-size: var(--font-size-xl);
}

.cart-total {
    font-weight: 600;
    color: var(--color-primary);
    margin-left: var(--spacing-md);
}

.btn-to-cart {
    min-width: 160px;
}

/* ========================================
   Cart Screen
   ======================================== */
.cart-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

.cart-items {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.cart-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background: var(--color-card);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow);
}

.cart-item-info {
    flex: 1;
}

.cart-item-name {
    font-size: var(--font-size-lg);
    font-weight: 500;
}

.cart-item-quantity {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
}

.cart-item-price {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-right: var(--spacing-md);
}

.cart-item-remove {
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 50%;
    background: #FFE5E5;
    color: #E74C3C;
    font-size: var(--font-size-lg);
    cursor: pointer;
}

.cart-item-remove:active {
    background: #E74C3C;
    color: white;
}

.cart-summary {
    background: var(--color-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-lg);
}

.summary-row.total {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-primary);
}

/* ========================================
   Payment Options
   ======================================== */
.payment-options {
    padding: var(--spacing-lg);
    background: var(--color-card);
    border-top: 1px solid var(--color-border);
}

.payment-label {
    text-align: center;
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
}

.payment-buttons {
    display: flex;
    gap: var(--spacing-md);
}

.btn-payment {
    flex: 1;
    padding: var(--spacing-lg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-card);
    font-size: var(--font-size-lg);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    min-height: 80px;
}

.btn-payment:active {
    transform: scale(0.98);
}

.btn-credit {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-credit:active {
    background: var(--color-primary);
    color: white;
}

.btn-counter {
    border-color: var(--color-secondary);
    color: var(--color-secondary);
}

.btn-counter:active {
    background: var(--color-secondary);
    color: white;
}

/* ========================================
   Payment Form (Mock)
   ======================================== */
.payment-form {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.card-form {
    width: 100%;
    max-width: 400px;
    background: var(--color-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-size: var(--font-size-base);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-light);
}

.form-group input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-lg);
    transition: border-color var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-row {
    display: flex;
    gap: var(--spacing-md);
}

.form-group.half {
    flex: 1;
}

.demo-notice {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.btn-pay {
    width: 100%;
    max-width: 400px;
}

/* ========================================
   Loading Overlay
   ======================================== */
.loading-overlay {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.loading-overlay.active {
    display: flex;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ========================================
   Complete Screen
   ======================================== */
.complete-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    text-align: center;
}

.complete-icon {
    font-size: 80px;
    margin-bottom: var(--spacing-lg);
}

.complete-content h1 {
    font-size: var(--font-size-xxl);
    margin-bottom: var(--spacing-md);
}

.payment-status {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
}

.btn-home {
    min-width: 200px;
}

/* ========================================
   Toast Notification
   ======================================== */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-secondary);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 200;
    pointer-events: none;
}

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

.toast.success {
    background: var(--color-success);
}

/* ========================================
   決済（Omnial）追加スタイル
   ======================================== */
.mode-badge {
    display: inline-block;
    margin-left: var(--spacing-xs);
    padding: 2px 10px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 999px;
    background: #FFF3CD;
    color: #856404;
    vertical-align: middle;
}
.mode-badge:empty {
    display: none;
}

.payment-error {
    display: none;
    margin: 0 0 var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    background: #F8D7DA;
    color: #721C24;
    font-size: var(--font-size-base);
    line-height: 1.5;
    max-width: 480px;
    width: 100%;
}
.payment-error.show {
    display: block;
}

.pickup-number {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    margin: var(--spacing-md) 0 var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    background: var(--color-card);
    box-shadow: var(--shadow);
}
.pickup-label {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
}
.pickup-value {
    font-size: 72px;
    font-weight: 800;
    letter-spacing: 4px;
    color: var(--color-primary);
    line-height: 1.1;
}
.pickup-note {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}
.order-id {
    font-size: 12px;
    color: var(--color-text-light);
    margin-top: var(--spacing-xs);
}