/* ===================================
   COMMON CSS STYLES - SHARED ACROSS ALL PAGES
   POS System - Lẩu Nướng
   Theme: Based on khachhang.html (Customer Page)
   =================================== */

/* ===================================
   1. CSS VARIABLES - THEME FROM CUSTOMER PAGE
   =================================== */
:root {
    /* Primary Colors - Orange Gradient (from customer page) */
    --primary-color: #FF5722;
    --primary-color-light: #FF9800;
    --primary-gradient: linear-gradient(135deg, #FF5722 0%, #FF9800 100%);
    
    /* Secondary Colors */
    --secondary-color: #FFF3E0;
    --accent-color: #FF5722;
    --accent-light: #FFF3E0;
    
    /* Background Colors */
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f9f9f9;
    --bg-hover: #eee;
    
    /* Text Colors */
    --text-primary: #333;
    --text-secondary: #666;
    --text-tertiary: #999;
    --text-muted: #777;
    --text-on-primary: #ffffff;
    
    /* Border Colors */
    --border-color: #ddd;
    --border-color-light: #eee;
    --border-color-dark: #ccc;
    
    /* Status Colors */
    --success-color: #4CAF50;
    --success-bg: #E8F5E9;
    --warning-color: #FF9800;
    --warning-bg: #FFF3E0;
    --error-color: #FF5722;
    --error-bg: #FFEBEE;
    --info-color: #2196F3;
    --info-bg: #E3F2FD;
    
    /* Shadows - Based on customer page */
    --shadow-xs: 0 2px 5px rgba(0,0,0,0.1);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.03);
    --shadow-md: 0 2px 10px rgba(0,0,0,0.05);
    --shadow-lg: 0 4px 15px rgba(255, 87, 34, 0.3);
    --shadow-xl: 0 4px 20px rgba(0,0,0,0.1);
    --shadow-2xl: 0 -5px 20px rgba(0,0,0,0.1);
    
    /* Border Radius - Based on customer page */
    --radius-xs: 8px;
    --radius-sm: 10px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 25px;
    --radius-round: 50px;
    --radius-full: 50%;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 15px;
    --spacing-xl: 20px;
    --spacing-2xl: 25px;
    --spacing-3xl: 30px;
    
    /* Typography - Optimized for Vietnamese */
    --font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, "Roboto", "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    --font-size-xs: 12px;
    --font-size-sm: 13px;
    --font-size-base: 14px;
    --font-size-md: 15px;
    --font-size-lg: 16px;
    --font-size-xl: 18px;
    --font-size-2xl: 20px;
    --font-size-3xl: 24px;
    
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    /* Transitions */
    --transition-fast: all 0.1s ease;
    --transition-normal: all 0.2s ease;
    --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-bounce: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    
    /* Z-index layers */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 100;
    --z-fixed: 900;
    --z-overlay: 2000;
    --z-modal: 2100;
    --z-tooltip: 3000;
}

/* Dark Theme Variables (for kitchen page) */
.dark-theme {
    --bg-primary: #0D0D0D;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #2a2a2a;
    --bg-hover: #333;
    
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-tertiary: #999999;
    --text-muted: #777777;
    
    --border-color: #333;
    --border-color-light: #444;
    --border-color-dark: #222;
}

/* ===================================
   2. GLOBAL RESET
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

/* ===================================
   3. COMMON BODY & TYPOGRAPHY
   =================================== */
body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    font-feature-settings: "kern" 1;
}

/* ===================================
   4. BUTTON COMPONENTS
   =================================== */

/* Base Button */
button {
    cursor: pointer;
    border: none;
    font-family: inherit;
    font-weight: var(--font-weight-semibold);
    transition: var(--transition-normal);
    outline: none;
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

button:active:not(:disabled) {
    transform: scale(0.95);
}

/* Primary Button - Orange Gradient */
.btn-primary,
.submit-btn {
    background: var(--primary-gradient);
    color: var(--text-on-primary);
    padding: 12px 30px;
    border-radius: var(--radius-2xl);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-fast);
}

.btn-primary:hover:not(:disabled),
.submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 87, 34, 0.4);
}

.btn-primary:disabled,
.submit-btn:disabled {
    background: #ccc;
    box-shadow: none;
    transform: none;
}

/* Secondary Button */
.btn-secondary {
    background: var(--bg-secondary);
    color: var(--primary-color);
    padding: 12px 24px;
    border-radius: var(--radius-xl);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-hover);
    border-color: var(--primary-color);
}

/* Circle Button */
.btn-circle {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    transition: var(--transition-fast);
}

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

.btn-minus {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* Block Button (Full Width) */
.btn-block {
    width: 100%;
    padding: 12px;
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-semibold);
    border: none;
}

.btn-cancel {
    background: #f0f0f0;
    color: #555;
}

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

/* ===================================
   5. CARD COMPONENT
   =================================== */
.card {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

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

/* ===================================
   6. MODAL COMPONENT
   =================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: var(--z-modal);
    display: none;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(2px);
}

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

.modal-content {
    background: var(--bg-secondary);
    width: 90%;
    max-width: 400px;
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    animation: slideUp 0.3s ease-out;
}

/* ===================================
   7. INPUT GROUP COMPONENT
   =================================== */
.input-group {
    margin-bottom: var(--spacing-lg);
}

.input-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    font-size: var(--font-size-base);
}

.search-input,
input[type="text"],
input[type="number"],
input[type="date"],
textarea {
    width: 100%;
    padding: 10px 15px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    font-size: var(--font-size-base);
    font-family: inherit;
    outline: none;
    transition: var(--transition-normal);
}

.search-input:focus,
input[type="text"]:focus,
input[type="number"]:focus,
input[type="date"]:focus,
textarea:focus {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(255, 87, 34, 0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

/* ===================================
   8. TAG/PILL COMPONENT
   =================================== */
.tag-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin: var(--spacing-lg) 0;
}

.tag-btn,
.cat-pill {
    padding: 8px 14px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color-light);
    background: var(--bg-tertiary);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: var(--transition-smooth);
    white-space: nowrap;
}

.tag-btn:hover,
.cat-pill:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tag-btn.active,
.cat-pill.active {
    background: var(--secondary-color);
    color: var(--primary-color);
    border-color: var(--primary-color);
    font-weight: var(--font-weight-semibold);
    box-shadow: 0 2px 8px rgba(255, 87, 34, 0.2);
}

/* ===================================
   9. HEADER COMPONENT
   =================================== */
.header {
    background: var(--primary-gradient);
    color: var(--text-on-primary);
    padding: var(--spacing-lg) var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.header h1 {
    margin: 0;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
}

.header .sub-text {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    margin-top: 2px;
}

/* Badge Component */
.table-badge {
    background: var(--bg-secondary);
    color: var(--primary-color);
    padding: 6px 12px;
    border-radius: var(--radius-xl);
    font-weight: var(--font-weight-extrabold);
    font-size: var(--font-size-base);
    box-shadow: var(--shadow-xs);
}

/* ===================================
   10. TAB NAVIGATION
   =================================== */
.tab-nav {
    display: flex;
    background: var(--bg-secondary);
    overflow-x: auto;
    padding: 0 var(--spacing-lg);
    border-bottom: 1px solid var(--border-color-light);
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    background: none;
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    color: var(--text-muted);
    cursor: pointer;
    white-space: nowrap;
    border-bottom: 3px solid transparent;
    transition: var(--transition-normal);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

/* ===================================
   11. STICKY CONTAINER
   =================================== */
.sticky-container {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: var(--bg-secondary);
    box-shadow: var(--shadow-md);
}

/* ===================================
   12. BOTTOM BAR
   =================================== */
.bottom-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    padding: var(--spacing-lg) var(--spacing-xl);
    box-shadow: var(--shadow-2xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: var(--z-fixed);
}

/* ===================================
   13. UTILITY CLASSES
   =================================== */

/* Loading States */
.loading {
    text-align: center;
    padding: 40px 20px;
    color: var(--primary-color);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-medium);
}

.loading::after {
    content: '...';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60%, 100% { content: '...'; }
}

/* Empty States */
.empty-message,
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-tertiary);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-medium);
}

.empty-state-icon {
    font-size: 64px;
    margin-bottom: var(--spacing-xl);
    opacity: 0.5;
}

/* Error States */
.error-message,
.error-screen {
    background: var(--error-bg);
    color: var(--error-color);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--error-color);
    margin: var(--spacing-lg) 0;
}

/* Success States */
.success-message {
    background: var(--success-bg);
    color: var(--success-color);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--success-color);
    margin: var(--spacing-lg) 0;
}

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

/* Text Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-bold { font-weight: var(--font-weight-bold); }

/* Flex Utilities */
.flex { display: flex; }
.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}
.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.flex-column {
    display: flex;
    flex-direction: column;
}

/* Spacing Utilities */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

/* ===================================
   14. COMMON ANIMATIONS
   =================================== */

/* Fade In */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Slide Up */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Slide In from Right */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Pop In */
@keyframes popIn {
    0% {
        opacity: 0;
        transform: scale(0.8);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Pulse */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* Shake */
@keyframes shake {
    0% { transform: rotate(0deg); }
    25% { transform: rotate(10deg); }
    75% { transform: rotate(-10deg); }
    100% { transform: rotate(0deg); }
}

/* ===================================
   15. COMMON SCROLLBAR STYLES
   =================================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color-dark);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Hide scrollbar for category nav */
.category-nav::-webkit-scrollbar,
.tab-nav::-webkit-scrollbar {
    display: none;
}

.category-nav,
.tab-nav {
    scrollbar-width: none;
    -ms-overflow-style: none;
}

/* ===================================
   16. RESPONSIVE UTILITIES
   =================================== */

/* Hide on mobile */
@media (max-width: 768px) {
    .hide-mobile {
        display: none !important;
    }
}

/* Hide on desktop */
@media (min-width: 769px) {
    .hide-desktop {
        display: none !important;
    }
}

/* ===================================
   17. PRINT STYLES
   =================================== */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .no-print {
        display: none !important;
    }
    
    button,
    .bottom-bar,
    .search-container,
    .category-nav {
        display: none !important;
    }
}