/* ============================================
   Apple-Inspired Design System
   Clean, Minimal, Elegant
   ============================================ */

:root {
    /* Apple-style Color Palette */
    --apple-black: #1d1d1f;
    --apple-gray-dark: #424245;
    --apple-gray: #86868b;
    --apple-gray-light: #d2d2d7;
    --apple-white: #fbfbfd;
    --apple-blue: #0071e3;
    --apple-blue-hover: #0077ed;
    --apple-green: #34c759;
    --apple-red: #ff3b30;
    --apple-orange: #ff9500;
    
    /* Semantic Colors */
    --primary-color: var(--apple-blue);
    --primary-hover: var(--apple-blue-hover);
    --text-primary: var(--apple-black);
    --text-secondary: var(--apple-gray);
    --text-tertiary: var(--apple-gray-light);
    --background-primary: var(--apple-white);
    --background-secondary: #f5f5f7;
    --background-tertiary: #ffffff;
    --border-color: rgba(0, 0, 0, 0.08);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    
    /* Status Colors */
    --success-color: var(--apple-green);
    --error-color: var(--apple-red);
    --warning-color: var(--apple-orange);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background-secondary);
    color: var(--text-primary);
    line-height: 1.5;
    letter-spacing: -0.01em;
}

/* App Container */
.app-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* ============================================
   Header - Apple Navigation Style
   ============================================ */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-xl);
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border-color);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.app-header h1 {
    font-size: 21px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* ============================================
   Search - Apple Spotlight Style
   ============================================ */
.search-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.search-breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--apple-blue);
    color: white;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 500;
    white-space: nowrap;
}

.breadcrumb-home {
    cursor: pointer;
    opacity: 0.9;
    transition: opacity var(--transition-fast);
}

.breadcrumb-home:hover { opacity: 1; }
.breadcrumb-separator { opacity: 0.6; }
.breadcrumb-path { max-width: 180px; overflow: hidden; text-overflow: ellipsis; }

#search-input {
    width: 280px;
    padding: 10px 18px;
    border: none;
    border-radius: var(--radius-full);
    font-size: 14px;
    background: var(--background-secondary);
    color: var(--text-primary);
    outline: none;
    transition: all var(--transition-normal);
}

#search-input::placeholder {
    color: var(--text-secondary);
}

#search-input:focus {
    background: white;
    box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.15);
}

#search-clear {
    width: 32px;
    height: 32px;
    padding: 0;
    border-radius: 50%;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--background-secondary);
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

#search-clear:hover {
    background: var(--apple-gray-light);
    color: var(--text-primary);
}

/* ============================================
   Buttons - Apple Style
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

.btn-primary {
    background: var(--apple-blue);
    color: white;
}

.btn-primary:hover {
    background: var(--apple-blue-hover);
}

.btn-secondary {
    background: var(--background-secondary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--apple-gray-light);
}

.btn-danger {
    background: var(--apple-red);
    color: white;
}

.btn-danger:hover {
    background: #ff453a;
}

.btn-small {
    padding: 6px 14px;
    font-size: 12px;
}

.btn-enter-context, .btn-enter-category {
    background: rgba(0, 113, 227, 0.1);
    color: var(--apple-blue);
    font-weight: 500;
    margin-left: var(--spacing-sm);
}

.btn-enter-context:hover, .btn-enter-category:hover {
    background: var(--apple-blue);
    color: white;
}

.btn-block {
    width: 100%;
}

/* ============================================
   Upload Section - Apple Card Style
   ============================================ */
.upload-section {
    margin-bottom: var(--spacing-lg);
}

.upload-section.compact .upload-area {
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.upload-area {
    position: relative;
    border: 2px dashed var(--apple-gray-light);
    border-radius: var(--radius-lg);
    padding: 48px;
    text-align: center;
    background: var(--background-tertiary);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.upload-area:hover, .upload-area.dragover {
    border-color: var(--apple-blue);
    background: rgba(0, 113, 227, 0.02);
}

.upload-area input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.upload-prompt { pointer-events: none; }

.upload-section.compact .upload-prompt {
    display: flex;
    align-items: center;
    gap: 10px;
}

.upload-icon {
    font-size: 40px;
    display: block;
    margin-bottom: 12px;
    filter: grayscale(20%);
}

.upload-section.compact .upload-icon {
    font-size: 22px;
    margin-bottom: 0;
}

.upload-text {
    font-size: 15px;
    color: var(--text-secondary);
}

.upload-hint {
    color: var(--text-tertiary);
    font-size: 13px;
    margin-top: 8px;
}

/* ============================================
   Column Selection - Apple Form Style
   ============================================ */
.column-selection-section {
    background: var(--background-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.column-selection-section h2 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.month-input { margin-bottom: var(--spacing-lg); }

.month-input label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    font-size: 14px;
    color: var(--text-secondary);
}

.month-input input {
    width: 220px;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background: var(--background-secondary);
    transition: all var(--transition-fast);
}

.month-input input:focus {
    outline: none;
    border-color: var(--apple-blue);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.1);
}

.special-columns {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.special-column-select {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.special-column-select label {
    font-weight: 500;
    font-size: 13px;
    color: var(--text-secondary);
}

.special-column-select select {
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    min-width: 160px;
    background: var(--background-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.special-column-select select:focus {
    outline: none;
    border-color: var(--apple-blue);
}

.column-checkboxes {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--background-secondary);
    border-radius: var(--radius-md);
}

.column-checkbox {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--background-tertiary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    transition: all var(--transition-fast);
}

.column-checkbox:hover {
    background: rgba(0, 113, 227, 0.08);
}

.column-checkbox input { cursor: pointer; }
.column-actions { display: flex; gap: var(--spacing-sm); }

/* ============================================
   Data Display - Apple Card Grid
   ============================================ */
.data-display-section {
    background: var(--background-tertiary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    min-height: 420px;
}

/* Year Selector */
.year-selector {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--background-secondary);
    border-radius: var(--radius-lg);
}

.year-nav-btn {
    width: 36px;
    height: 36px;
    border: none;
    background: var(--background-tertiary);
    border-radius: 50%;
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.year-nav-btn:hover:not(:disabled) {
    background: var(--apple-blue);
    color: white;
}

.year-nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.year-tabs {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    max-width: 420px;
    scroll-behavior: smooth;
    padding: 2px;
}

.year-tabs::-webkit-scrollbar { display: none; }

.year-tab {
    padding: 10px 20px;
    border: none;
    background: var(--background-tertiary);
    border-radius: var(--radius-full);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.year-tab:hover {
    color: var(--apple-blue);
}

.year-tab.active {
    background: var(--apple-blue);
    color: white;
}

/* Month Selector */
.month-selector {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--background-secondary);
    border-radius: var(--radius-lg);
}

.month-tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: var(--spacing-sm);
    scroll-behavior: smooth;
    flex-wrap: wrap;
    justify-content: center;
}

.month-tabs::-webkit-scrollbar { display: none; }

.month-tab {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    background: var(--background-tertiary);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    white-space: nowrap;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.month-tab:hover {
    border-color: var(--apple-blue);
    color: var(--apple-blue);
}

.month-tab.active {
    background: var(--apple-blue);
    color: white;
    border-color: var(--apple-blue);
}

/* Selected Info */
.selected-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(0, 113, 227, 0.08);
    border-radius: var(--radius-md);
}

.selected-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--apple-blue);
}

/* Slider Navigation */
.slider-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.slider-nav-buttons { display: flex; gap: var(--spacing-sm); }

.slider-btn {
    width: 44px;
    height: 44px;
    border: none;
    background: var(--background-secondary);
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.slider-btn:hover:not(:disabled) {
    background: var(--apple-blue);
    color: white;
}

.slider-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.slider-info {
    color: var(--text-secondary);
    font-size: 13px;
}

/* Months Container */
.months-container {
    display: flex;
    gap: var(--spacing-lg);
    overflow-x: auto;
    scroll-behavior: smooth;
    padding-bottom: var(--spacing-md);
    scroll-snap-type: x mandatory;
}

.months-container::-webkit-scrollbar { height: 6px; }
.months-container::-webkit-scrollbar-track { background: transparent; }
.months-container::-webkit-scrollbar-thumb {
    background: var(--apple-gray-light);
    border-radius: var(--radius-full);
}
.months-container::-webkit-scrollbar-thumb:hover {
    background: var(--apple-gray);
}

.empty-state {
    width: 100%;
    text-align: center;
    padding: 80px var(--spacing-xl);
    color: var(--text-secondary);
}

.empty-state p {
    font-size: 17px;
}

/* Month Region Card */
.month-region {
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    min-width: 340px;
    max-width: 380px;
    flex-shrink: 0;
    scroll-snap-align: start;
    background: linear-gradient(135deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.7) 100%);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.8);
    box-shadow: var(--shadow-md);
}

.month-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 17px;
    font-weight: 600;
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    color: var(--text-primary);
}

.month-delete-btn {
    background: none;
    border: none;
    color: var(--apple-red);
    cursor: pointer;
    font-size: 18px;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    opacity: 0.7;
}

.month-delete-btn:hover {
    opacity: 1;
    background: rgba(255, 59, 48, 0.1);
}

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

.category-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    font-size: 13px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.02em;
    padding: var(--spacing-sm) 0;
    margin-bottom: var(--spacing-sm);
}

.category-title.clickable { cursor: pointer; }

.product-list { list-style: none; }

.product-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    margin-bottom: 4px;
    background: rgba(255, 255, 255, 0.6);
    transition: all var(--transition-fast);
}

.product-item:hover {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

.product-name {
    cursor: pointer;
    color: var(--apple-blue);
    font-weight: 500;
    font-size: 14px;
    flex: 1;
    transition: color var(--transition-fast);
}

.product-name:hover { color: var(--apple-blue-hover); }

.product-info {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.product-quantity {
    color: var(--text-secondary);
    font-size: 13px;
}

.product-sales {
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
}

/* ============================================
   Modal - Apple Sheet Style
   ============================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--background-tertiary);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 560px;
    max-height: 85vh;
    overflow: auto;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease;
}

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

.modal-content.confirm-dialog { max-width: 380px; }
.modal-content.auth-dialog { max-width: 400px; }
.modal-content.chart-modal-large { max-width: 900px; }

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 17px;
    font-weight: 600;
}

.modal-close {
    background: var(--background-secondary);
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-size: 18px;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--apple-gray-light);
    color: var(--text-primary);
}

.modal-body { padding: var(--spacing-xl); }

.chart-message {
    text-align: center;
    color: var(--text-secondary);
    padding: 60px var(--spacing-xl);
}

.confirm-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
    margin-top: var(--spacing-xl);
}

/* Chart Sections */
.chart-section { margin-bottom: var(--spacing-xl); }

.chart-section h4 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.02em;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.chart-row { display: flex; gap: var(--spacing-xl); }
.chart-section.half { flex: 1; min-width: 0; }

/* ============================================
   Auth UI - Apple Form Style
   ============================================ */
.user-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.user-logged-out, .user-logged-in {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.user-logged-in .username {
    font-weight: 500;
    font-size: 14px;
    color: var(--text-primary);
    padding: 8px 14px;
    background: var(--background-secondary);
    border-radius: var(--radius-full);
}

.user-logged-in .username.clickable {
    cursor: pointer;
    transition: all var(--transition-fast);
}

.user-logged-in .username.clickable:hover {
    background: var(--apple-blue);
    color: white;
}

/* Sync Status */
.sync-status {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 500;
    background: var(--background-secondary);
}

.sync-status.syncing {
    background: rgba(0, 113, 227, 0.1);
    color: var(--apple-blue);
}

.sync-status.synced {
    background: rgba(52, 199, 89, 0.1);
    color: var(--apple-green);
}

.sync-status.error {
    background: rgba(255, 59, 48, 0.1);
    color: var(--apple-red);
}

.sync-status.offline {
    background: rgba(255, 149, 0, 0.1);
    color: var(--apple-orange);
}

.sync-icon { font-size: 14px; }
.sync-status.syncing .sync-icon { animation: spin 1s linear infinite; }

.sync-retry-btn {
    background: transparent;
    border: 1px solid currentColor;
    border-radius: var(--radius-sm);
    padding: 2px 8px;
    font-size: 12px;
    cursor: pointer;
    color: inherit;
    margin-left: 4px;
    transition: all 0.2s ease;
}

.sync-retry-btn:hover {
    background: rgba(0, 0, 0, 0.1);
}

/* Auth Form */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-weight: 500;
    font-size: 13px;
    color: var(--text-secondary);
}

.form-group input {
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 15px;
    background: var(--background-secondary);
    transition: all var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--apple-blue);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.1);
    background: white;
}

.form-group input.error {
    border-color: var(--apple-red);
}

.form-group input.error:focus {
    box-shadow: 0 0 0 3px rgba(255, 59, 48, 0.1);
}

.form-error {
    font-size: 12px;
    color: var(--apple-red);
    min-height: 16px;
}

.required {
    color: var(--apple-red);
    font-weight: 500;
}

.form-error-general {
    text-align: center;
    padding: 10px;
    background: rgba(255, 59, 48, 0.1);
    border-radius: var(--radius-sm);
    display: none;
    color: var(--apple-red);
    font-size: 13px;
}

.form-error-general:not(:empty) { display: block; }

.auth-switch {
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
}

.auth-switch a {
    color: var(--apple-blue);
    text-decoration: none;
    font-weight: 500;
}

.auth-switch a:hover { text-decoration: underline; }

/* Auth button loading */
.auth-form button[type="submit"].loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.auth-form button[type="submit"].loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 18px;
    height: 18px;
    margin: -9px 0 0 -9px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ============================================
   Messages - Apple Notification Style
   ============================================ */
.message-container {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    z-index: 1001;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.message {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    color: white;
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.3s ease;
    backdrop-filter: blur(10px);
}

.message.error { background: var(--apple-red); }
.message.success { background: var(--apple-green); }
.message.warning { background: var(--apple-orange); }

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

/* ============================================
   Loading State
   ============================================ */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--apple-gray-light);
    border-top-color: var(--apple-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ============================================
   Utility Classes
   ============================================ */
.highlight {
    background: rgba(255, 204, 0, 0.3);
    padding: 0 3px;
    border-radius: 3px;
}

/* ============================================
   User Management Modal
   ============================================ */
.modal-content.user-dialog {
    max-width: 500px;
}

.modal-body h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.modal-body h5 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.section-divider {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: var(--spacing-xl) 0;
}

.admin-add-user {
    margin-bottom: var(--spacing-lg);
}

.auth-form.compact .form-row {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    flex-wrap: wrap;
}

.auth-form.compact .form-row input,
.auth-form.compact .form-row select {
    flex: 1;
    min-width: 100px;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background: var(--background-secondary);
}

.auth-form.compact .form-row input:focus,
.auth-form.compact .form-row select:focus {
    outline: none;
    border-color: var(--apple-blue);
}

.admin-user-list {
    max-height: 300px;
    overflow-y: auto;
}

.user-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--background-secondary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

.user-list-item .user-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.user-list-item .user-name {
    font-weight: 500;
    font-size: 14px;
    color: var(--text-primary);
}

.user-list-item .user-realname {
    font-size: 13px;
    color: var(--text-secondary);
    margin-left: 4px;
}

.user-list-item .user-role {
    font-size: 12px;
    color: var(--text-secondary);
}

.user-list-item .user-role.admin {
    color: var(--apple-blue);
    font-weight: 500;
}

.user-list-item .user-status {
    font-size: 12px;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}

.user-list-item .user-status.pending {
    background: rgba(255, 149, 0, 0.15);
    color: var(--apple-orange);
}

.user-list-item .user-status.rejected {
    background: rgba(255, 59, 48, 0.15);
    color: var(--apple-red);
}

.user-list-item.pending {
    border-left: 3px solid var(--apple-orange);
}

.user-list-item.rejected {
    border-left: 3px solid var(--apple-red);
    opacity: 0.7;
}

.user-list-section {
    margin-bottom: var(--spacing-lg);
}

.user-list-section h6 {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.02em;
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--border-color);
}

.user-list-item .user-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.btn-icon.btn-secondary {
    background: rgba(0, 113, 227, 0.1);
    color: var(--apple-blue);
}

.btn-icon.btn-secondary:hover {
    background: var(--apple-blue);
    color: white;
}

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.btn-icon.btn-danger {
    background: rgba(255, 59, 48, 0.1);
    color: var(--apple-red);
}

.btn-icon.btn-danger:hover {
    background: var(--apple-red);
    color: white;
}

.user-list-empty {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-secondary);
    font-size: 14px;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .app-container {
        padding: var(--spacing-md);
    }
    
    .app-header {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
        padding: var(--spacing-md);
    }
    
    .header-left, .header-right {
        width: 100%;
        justify-content: center;
    }
    
    .header-right {
        flex-direction: column;
    }
    
    .search-container {
        width: 100%;
        justify-content: center;
    }
    
    #search-input {
        width: 100%;
        max-width: 300px;
    }
    
    .user-status {
        width: 100%;
        justify-content: center;
    }
    
    .user-logged-out, .user-logged-in {
        width: 100%;
        justify-content: center;
    }
    
    .sync-status {
        width: auto;
        justify-content: center;
    }
    
    .special-columns {
        flex-direction: column;
    }
    
    .month-region {
        min-width: 300px;
        max-width: 100%;
    }
    
    .modal-content {
        width: 95%;
        margin: var(--spacing-md);
        max-height: 90vh;
    }
    
    .year-tabs {
        max-width: 260px;
    }
    
    .year-tab {
        padding: 8px 16px;
        font-size: 13px;
    }
    
    .chart-row {
        flex-direction: column;
    }
    
    .chart-section.half {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .app-header h1 {
        font-size: 18px;
    }
    
    .month-region {
        min-width: 280px;
        padding: var(--spacing-md);
    }
    
    .product-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .product-info {
        width: 100%;
        justify-content: space-between;
    }
}

/* ============================================
   Dark Mode Support (Optional)
   ============================================ */
@media (prefers-color-scheme: dark) {
    :root {
        --background-primary: #000000;
        --background-secondary: #1c1c1e;
        --background-tertiary: #2c2c2e;
        --text-primary: #ffffff;
        --text-secondary: #98989d;
        --text-tertiary: #48484a;
        --border-color: rgba(255, 255, 255, 0.1);
    }
    
    .app-header {
        background: rgba(28, 28, 30, 0.72);
    }
    
    .month-region {
        background: linear-gradient(135deg, rgba(44,44,46,0.9) 0%, rgba(44,44,46,0.7) 100%);
        border-color: rgba(255,255,255,0.1);
    }
    
    .product-item {
        background: rgba(58, 58, 60, 0.6);
    }
    
    .product-item:hover {
        background: rgba(58, 58, 60, 0.95);
    }
    
    #search-input {
        background: var(--background-tertiary);
        color: var(--text-primary);
    }
    
    #search-input:focus {
        background: var(--background-tertiary);
    }
}