/*
 * SWIFT IoT System - Main Stylesheet
 * 
 * This CSS file contains all styling for the SWIFT IoT Smart Swine Farming System.
 * It provides a comprehensive design system with consistent colors, typography,
 * spacing, and component styles for the entire application.
 * 
 * Features:
 * - CSS Custom Properties (CSS Variables) for consistent theming
 * - Responsive design with mobile-first approach
 * - Component-based styling architecture
 * - Modern CSS features (Grid, Flexbox, Custom Properties)
 * - Accessibility-focused design patterns
 * - Consistent spacing and typography scales
 * 
 * @version 2.0
 * @author SWIFT Development Team
 * @since 2024
 */

/* CSS Custom Properties (CSS Variables) */
/* These variables provide a centralized way to manage colors, spacing, typography, and other design tokens */
:root {
    
    /* Primary Color Palette */
    --primary-color: #1877f2;                               /* Main brand color (Facebook Blue) */
    --primary-dark: #166fe5;                                /* Darker shade for hover states */
    --primary-light: #e7f3ff;                               /* Light shade for backgrounds */
    --primary-gradient: linear-gradient(135deg, #1877f2 0%, #166fe5 100%);  /* Gradient variant */

    /* Text Color Palette */
    --text-primary: #1c1e21;                                /* Primary text color (dark) */
    --text-secondary: #65676b;                              /* Secondary text color (medium) */
    --text-tertiary: #8a8d91;                               /* Tertiary text color (light) */
    --text-inverse: #ffffff;                                /* Inverse text color (white) */

    /* Gray Scale Palette */
    --gray-50: #f0f2f5;                                     /* Lightest gray (backgrounds) */
    --gray-100: #e4e6ea;                                    /* Very light gray */
    --gray-200: #dadde1;                                     /* Light gray */
    --gray-300: #bcc0c4;                                    /* Medium light gray */
    --gray-400: #8a8d91;                                    /* Medium gray */
    --gray-500: #65676b;                                    /* Medium dark gray */
    --gray-600: #4e4f50;                                    /* Dark gray */
    --gray-700: #3a3b3c;                                    /* Very dark gray */
    --gray-800: #242526;                                    /* Darker gray */
    --gray-900: #18191a;                                    /* Darkest gray */

    /* Semantic Color Palette */
    --white: #ffffff;                                       /* Pure white */
    --success: #42b883;                                     /* Success color (green) */
    --success-light: #d4edda;                              /* Light success color */
    --success-dark: #28a745;                               /* Dark success color */
    --danger: #f02849;                                      /* Danger color (red) */
    --danger-light: #f8d7da;                               /* Light danger color */
    --danger-dark: #dc3545;                                /* Dark danger color */
    --warning: #f7b928;                                     /* Warning color (yellow) */
    --warning-light: #fff3cd;                              /* Light warning color */
    --warning-dark: #ffc107;                                /* Dark warning color */
    --info: #17a2b8;                                        /* Info color (blue) */
    --info-light: #d1ecf1;                                 /* Light info color */
    --info-dark: #138496;                                   /* Dark info color */

    /* Shadow System */
    --card-shadow: 0 2px 4px rgba(0,0,0,.1), 0 8px 16px rgba(0,0,0,.1);  /* Default card shadow */
    --card-shadow-hover: 0 4px 8px rgba(0,0,0,.15), 0 12px 24px rgba(0,0,0,.15);  /* Hover shadow */
    --card-shadow-focus: 0 0 0 3px rgba(24, 119, 242, 0.1);  /* Focus shadow */
    
    /* Border Radius System */
    --border-radius: 8px;                                   /* Default border radius */
    --border-radius-sm: 4px;                                /* Small border radius */
    --border-radius-lg: 12px;                               /* Large border radius */
    --border-radius-xl: 16px;                               /* Extra large border radius */

    /* Spacing System */
    --space-xs: 4px;                                        /* Extra small spacing */
    --space-sm: 8px;                                        /* Small spacing */
    --space-md: 16px;                                        /* Medium spacing */
    --space-lg: 24px;                                        /* Large spacing */
    --space-xl: 32px;                                        /* Extra large spacing */
    --space-2xl: 48px;                                       /* Double extra large spacing */

    /* Typography Scale */
    --font-size-xs: 12px;                                   /* Extra small font size */
    --font-size-sm: 14px;                                    /* Small font size */
    --font-size-md: 16px;                                    /* Medium font size */
    --font-size-lg: 18px;                                    /* Large font size */
    --font-size-xl: 20px;                                    /* Extra large font size */
    --font-size-2xl: 24px;                                   /* Double extra large font size */
    --font-size-3xl: 32px;                                   /* Triple extra large font size */

    /* Line Height Scale */
    --line-height-tight: 1.25;                              /* Tight line height */
    --line-height-normal: 1.5;                              /* Normal line height */
    --line-height-relaxed: 1.75;                            /* Relaxed line height */

    /* Transition System */
    --transition-fast: 0.15s ease;                           /* Fast transition */
    --transition-normal: 0.2s ease;                          /* Normal transition */
    --transition-slow: 0.3s ease;                            /* Slow transition */

    /* Responsive Breakpoints */
    --breakpoint-sm: 576px;                                  /* Small devices */
    --breakpoint-md: 768px;                                  /* Medium devices */
    --breakpoint-lg: 992px;                                  /* Large devices */
    --breakpoint-xl: 1200px;                                 /* Extra large devices */
    --breakpoint-2xl: 1400px;                                /* Double extra large devices */
}

/* Global Reset and Base Styles */
/* Resets default browser styles and establishes consistent base styling */

/* Universal Box Sizing */
* { 
    box-sizing: border-box;                                  /* Include padding and border in element width */
    margin: 0;                                               /* Remove default margins */
    padding: 0;                                              /* Remove default padding */
}

/* Form Element Reset */
/* Resets form elements to have consistent styling across browsers */
input,
textarea,
select,
button {
    margin: 0;                                               /* Remove default margins */
    padding: 0;                                              /* Remove default padding */
    border: 0;                                               /* Remove default borders */
    outline: 0;                                              /* Remove default outline */
    font-size: 100%;                                         /* Use parent font size */
    vertical-align: baseline;                                /* Align to baseline */
    background: transparent;                                 /* Remove default background */
    color: inherit;                                          /* Inherit text color */
    font-family: inherit;                                    /* Inherit font family */
    line-height: inherit;                                    /* Inherit line height */
}

input:not([type="hidden"]),
textarea,
select {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body { 
    margin: 0; 
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-primary); 
    background: var(--gray-50);
    line-height: var(--line-height-normal);
    font-size: var(--font-size-md);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

*:focus:not(:focus-visible) {
    outline: none;
}

input:focus,
textarea:focus,
select:focus,
button:focus {
    outline: 2px solid var(--primary-color) !important;
    outline-offset: 2px !important;
    border-color: var(--primary-color) !important;
    box-shadow: var(--card-shadow-focus) !important;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
input[type="datetime-local"]:focus,
input[type="search"]:focus,
input[type="url"]:focus,
input[type="tel"]:focus {
    outline: 2px solid var(--primary-color) !important;
    outline-offset: 2px !important;
    border-color: var(--primary-color) !important;
    box-shadow: var(--card-shadow-focus) !important;
}

textarea:focus {
    outline: 2px solid var(--primary-color) !important;
    outline-offset: 2px !important;
    border-color: var(--primary-color) !important;
    box-shadow: var(--card-shadow-focus) !important;
}

select:focus {
    outline: 2px solid var(--primary-color) !important;
    outline-offset: 2px !important;
    border-color: var(--primary-color) !important;
    box-shadow: var(--card-shadow-focus) !important;
}

input,
textarea,
select {
    border: 1px solid var(--gray-300) !important;
    border-radius: var(--border-radius) !important;
    padding: var(--space-sm) var(--space-md) !important;
    font-size: var(--font-size-md) !important;
    font-family: inherit !important;
    background: var(--white) !important;
    color: var(--text-primary) !important;
    transition: all var(--transition-normal) !important;
    outline: none !important;
    display: block !important;
    width: 100% !important;
    box-sizing: border-box !important;
    margin: 0 !important;
    line-height: 1.5 !important;
    min-height: 40px !important;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="search"],
input[type="url"],
input[type="tel"] {
    border: 1px solid var(--gray-300) !important;
    background: var(--white) !important;
    color: var(--text-primary) !important;
    padding: var(--space-sm) var(--space-md) !important;
    font-size: var(--font-size-md) !important;
    border-radius: var(--border-radius) !important;
    min-height: 40px !important;
    width: 100% !important;
    display: block !important;
    box-sizing: border-box !important;
}

input[type="date"],
input[type="time"],
input[type="datetime-local"] {
    border: 1px solid var(--gray-300) !important;
    background: var(--white) !important;
    color: var(--text-primary) !important;
    padding: var(--space-sm) var(--space-md) !important;
    font-size: var(--font-size-md) !important;
    border-radius: var(--border-radius) !important;
    min-height: 40px !important;
    min-width: 140px !important;
    display: block !important;
    box-sizing: border-box !important;
}

textarea {
    border: 1px solid var(--gray-300) !important;
    background: var(--white) !important;
    color: var(--text-primary) !important;
    padding: var(--space-sm) var(--space-md) !important;
    font-size: var(--font-size-md) !important;
    border-radius: var(--border-radius) !important;
    min-height: 80px !important;
    width: 100% !important;
    display: block !important;
    box-sizing: border-box !important;
    resize: vertical !important;
}

select {
    border: 1px solid var(--gray-300) !important;
    background: var(--white) !important;
    color: var(--text-primary) !important;
    padding: var(--space-sm) var(--space-md) !important;
    font-size: var(--font-size-md) !important;
    border-radius: var(--border-radius) !important;
    min-height: 40px !important;
    width: 100% !important;
    display: block !important;
    box-sizing: border-box !important;
    cursor: pointer !important;
}

input:hover,
textarea:hover,
select:hover {
    border-color: var(--gray-400) !important;
}

input:focus,
textarea:focus,
select:focus {
    outline: 2px solid var(--primary-color) !important;
    outline-offset: 2px !important;
    border-color: var(--primary-color) !important;
    box-shadow: var(--card-shadow-focus) !important;
}

input::placeholder,
textarea::placeholder {
    color: var(--text-tertiary);
    opacity: 1;
}

input:disabled,
textarea:disabled,
select:disabled {
    background: var(--gray-100);
    color: var(--text-tertiary);
    cursor: not-allowed;
    opacity: 0.6;
}

input:invalid,
textarea:invalid,
select:invalid {
    border-color: var(--danger);
}

input:valid,
textarea:valid,
select:valid {
    border-color: var(--success);
}

input:required,
textarea:required,
select:required {
    border-left: 3px solid var(--primary-color);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
}

.form-row {
    display: flex;
    gap: var(--space-md);
    align-items: end;
}

.form-row .form-group {
    flex: 1;
    margin-bottom: 0;
}

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

.control-group label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
    margin: 0;
    white-space: nowrap;
}

.control-group input {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius);
    background: var(--white);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    transition: all var(--transition-normal);
    outline: none;
}

.control-group input:hover {
    border-color: var(--gray-400);
}

.control-group input:focus {
    outline: 2px solid var(--primary-color) !important;
    outline-offset: 2px !important;
    border-color: var(--primary-color) !important;
    box-shadow: var(--card-shadow-focus) !important;
}

.header-controls input[type="date"] {
    min-width: 140px;
}

button:focus,
.control-btn:focus {
    outline: 2px solid var(--primary-color) !important;
    outline-offset: 2px !important;
    box-shadow: var(--card-shadow-focus) !important;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: var(--white);
    padding: 8px;
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    z-index: 1000;
}

.skip-link:focus {
    top: 6px;
}

.sidebar { 
    position: fixed; 
    top: 0; 
    left: 0; 
    bottom: 0; 
    width: 240px; 
    background: var(--white); 
    color: var(--text-primary); 
    box-shadow: var(--card-shadow); 
    padding: var(--space-md); 
    display: flex; 
    flex-direction: column; 
    justify-content: space-between; 
    border-right: 1px solid var(--gray-200);
    z-index: 100;
    transition: transform var(--transition-normal);
}
.sidebar-top { flex: 1; }
.sidebar-bottom { margin-top: auto; }
.logo { margin-bottom: 20px; }
.nav-menu { display: flex; flex-direction: column; gap: 8px; }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: var(--border-radius); color: var(--text-primary); text-decoration: none; transition: background .2s ease, color .2s ease; }
.nav-item.active, .nav-item:hover { background: var(--primary-light); color: var(--primary-color); }

.main-content { 
    margin-left: 260px; 
    padding: var(--space-lg);
    min-height: 100vh;
    transition: margin-left var(--transition-normal);
}

.header { 
    display: flex; 
    align-items: center; 
    justify-content: space-between;
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
    gap: var(--space-md);
}

.welcome-section {
    flex: 1;
    min-width: 200px;
}

.welcome-title { 
    margin: var(--space-xs) 0 0 0;
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--text-primary);
}

.greeting {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0;
}

.header-controls { 
    display: flex; 
    align-items: center; 
    gap: var(--space-md);
    flex-wrap: wrap;
}

.logo { 
    margin-bottom: var(--space-lg);
    text-align: center;
}

.nav-menu { 
    display: flex; 
    flex-direction: column; 
    gap: var(--space-sm);
    flex: 1;
}

.nav-item { 
    display: flex; 
    align-items: center; 
    gap: var(--space-sm); 
    padding: var(--space-sm) var(--space-md); 
    border-radius: var(--border-radius); 
    color: var(--text-primary); 
    text-decoration: none; 
    transition: all var(--transition-normal);
    font-weight: 500;
    position: relative;
}

.nav-item.active, 
.nav-item:hover { 
    background: var(--primary-light); 
    color: var(--primary-color);
    transform: translateX(2px);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
}

.transfer-cards { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); 
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.transfer-card { 
    background: var(--white); 
    border-radius: var(--border-radius); 
    padding: var(--space-md); 
    box-shadow: var(--card-shadow); 
    display: flex; 
    align-items: center; 
    gap: var(--space-md); 
    border: 1px solid var(--gray-200);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.transfer-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.transfer-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--card-shadow-hover);
    transform: translateY(-2px);
}

.transfer-card:hover::before {
    transform: scaleX(1);
}

.transfer-card.clickable { 
    cursor: pointer; 
}

.card-icon { 
    width: 48px; 
    height: 48px; 
    border-radius: var(--border-radius-lg); 
    background: var(--primary-light); 
    color: var(--primary-color); 
    display: flex; 
    align-items: center; 
    justify-content: center;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
    transition: all var(--transition-normal);
}

.transfer-card:hover .card-icon {
    background: var(--primary-color);
    color: var(--white);
    transform: scale(1.1);
}

.card-title {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
    margin: 0;
}

.card-amount {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin: var(--space-xs) 0 0 0;
    line-height: var(--line-height-tight);
}

.control-card { 
    background: var(--white); 
    border-radius: var(--border-radius); 
    padding: var(--space-lg); 
    box-shadow: var(--card-shadow); 
    border: 1px solid var(--gray-200);
    margin-bottom: var(--space-lg);
    transition: all var(--transition-normal);
}

.control-card:hover {
    box-shadow: var(--card-shadow-hover);
}

.control-btn { 
    padding: var(--space-sm) var(--space-md); 
    border: none; 
    border-radius: var(--border-radius-lg); 
    background: var(--primary-color); 
    color: var(--white); 
    cursor: pointer; 
    transition: all var(--transition-normal);
    font-weight: 500;
    font-size: var(--font-size-sm);
    position: relative;
    overflow: hidden;
}

.control-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left var(--transition-slow);
}

.control-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--card-shadow-focus);
}

.control-btn:hover::before {
    left: 100%;
}

.control-btn:active { 
    transform: translateY(0);
}

.control-btn:disabled { 
    opacity: 0.6; 
    cursor: not-allowed;
    transform: none;
}

.control-btn:disabled:hover {
    background: var(--primary-color);
    transform: none;
}

.control-btn.muted { 
    background: var(--gray-200); 
    color: var(--text-primary); 
}

.control-btn.muted:hover {
    background: var(--gray-300);
}

.control-btn.secondary { 
    background: var(--gray-300); 
    color: var(--white); 
}

.control-btn.secondary:hover {
    background: var(--gray-400);
}

.control-btn.danger { 
    background: var(--danger); 
}

.control-btn.danger:hover {
    background: var(--danger-dark);
}

.control-btn.success { 
    background: var(--success); 
}

.control-btn.success:hover {
    background: var(--success-dark);
}

.control-btn.warning { 
    background: var(--warning); 
}

.control-btn.warning:hover {
    background: var(--warning-dark);
}

.alert-card {
    transition: all 0.3s ease;
    animation: slideIn 0.3s ease-out;
}

.alert-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15) !important;
}

.alert-container::-webkit-scrollbar {
    width: 8px;
}

.alert-container::-webkit-scrollbar-track {
    background: var(--gray-light);
    border-radius: 4px;
}

.alert-container::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 4px;
}

.alert-container::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

.filter-btn {
    transition: all 0.2s ease;
}

.filter-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.filter-btn.active {
    transform: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

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

.alert-critical {
    border-left-color: var(--danger) !important;
    background: var(--danger-light) !important;
}

.alert-warning {
    border-left-color: var(--warning) !important;
    background: var(--warning-light) !important;
}

.alert-info {
    border-left-color: var(--info) !important;
    background: var(--info-light) !important;
}

.alert-normal {
    border-left-color: var(--success) !important;
    background: var(--success-light) !important;
}

/* Modal System */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.modal-container {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
    animation: slideIn 0.3s ease;
    border: none;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    background: var(--white);
    border: none;
}

.modal-title-section {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.modal-title-section i {
    font-size: var(--font-size-xl);
    margin-right: var(--space-xs);
}

.modal-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background var(--transition-fast);
}

.modal-close:hover {
    background: var(--gray-200);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--space-lg);
    color: var(--text-primary);
    line-height: var(--line-height-normal);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: var(--white);
    border: none;
}

.modal-btn {
    padding: var(--space-sm) var(--space-lg);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 80px;
}

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

.modal-btn-primary:hover {
    background: var(--primary-dark);
}

.modal-btn-secondary {
    background: var(--gray-300);
    color: var(--text-primary);
}

.modal-btn-secondary:hover {
    background: var(--gray-400);
}

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

.modal-btn-danger:hover {
    background: var(--danger-dark);
}

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

@keyframes slideIn {
    from { 
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to { 
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        padding: var(--space-md);
    }
    
    .header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-md);
    }
    
    .header-controls {
        justify-content: center;
    }
    
    .transfer-cards {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }
    
    .transfer-card {
        padding: var(--space-sm);
    }
    
    .card-icon {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-md);
    }
    
    .card-amount {
        font-size: var(--font-size-lg);
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: var(--space-sm);
    }
    
    .control-card {
        padding: var(--space-md);
    }
    
    .control-btn {
        width: 100%;
        padding: var(--space-md);
    }
    
    .header-controls {
        flex-direction: column;
        gap: var(--space-sm);
    }
}

.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: var(--space-md);
    left: var(--space-md);
    z-index: 200;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    padding: var(--space-sm);
    cursor: pointer;
    box-shadow: var(--card-shadow);
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }
}

.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { left: -100%; }
    100% { left: 100%; }
}

.error-state {
    background: var(--danger-light);
    border-color: var(--danger);
    color: var(--danger-dark);
}

.error-state .card-icon {
    background: var(--danger);
    color: var(--white);
}

.success-state {
    background: var(--success-light);
    border-color: var(--success);
    color: var(--success-dark);
}

.success-state .card-icon {
    background: var(--success);
    color: var(--white);
}

.warning-state {
    background: var(--warning-light);
    border-color: var(--warning);
    color: var(--warning-dark);
}

.warning-state .card-icon {
    background: var(--warning);
    color: var(--white);
}

.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td { padding: 10px 12px; border-bottom: 1px solid var(--gray-200); text-align: left; }
.data-table thead th { position: sticky; top: 0; background: var(--gray-50); z-index: 1; font-weight: 600; color: var(--text-primary); }
.heatmap-legend { display: flex; gap: 10px; justify-content: center; }
.legend-item { display: flex; align-items: center; gap: 6px; }
.legend-color { width: 16px; height: 16px; border-radius: 4px; }

.chart-container {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 16px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--gray-200);
    position: relative;
}

.chart-header h3 {
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.chart-status {
    font-size: 12px;
    color: var(--text-secondary);
    font-style: italic;
}

.time-filter-controls {
    display: flex;
    gap: 4px;
}

.time-filter-btn {
    padding: 6px 12px;
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    background: var(--white);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    transition: all 0.2s ease;
    position: relative;
    z-index: 10;
    user-select: none;
}

.time-filter-btn:hover {
    background: var(--gray-50);
    border-color: var(--gray-300);
}

.time-filter-btn.active {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.time-filter-btn.active:hover {
    background: var(--primary-dark);
}

@media (max-width: 1200px) {
    .chart-container {
        min-height: 150px;
    }
}

@media (max-width: 768px) {
    .time-filter-controls {
        flex-direction: column;
        gap: 2px;
    }
    
    .time-filter-btn {
        padding: 4px 8px;
        font-size: 11px;
    }
    
    .chart-container {
        min-height: 120px;
        padding: 12px;
    }
}

#heatmapCanvas { 
    max-width: 100%; 
    max-height: 100%; 
    object-fit: contain;
    transition: opacity 0.3s ease;
}
#heatmapContainer { 
    position: relative;
    background: var(--gray-50);
    border-radius: 8px;
    border: 1px solid var(--gray-200);
}

.activity-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

.activity-table th {
    background: var(--gray-50);
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--gray-200);
}

.activity-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--gray-200);
    vertical-align: top;
}

.activity-table tr:hover {
    background: var(--gray-50);
}

.activity-action {
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    text-transform: uppercase;
}

.action-login { background: #d4edda; color: #155724; }
.action-logout { background: #f8d7da; color: #721c24; }
.action-create { background: #d1ecf1; color: #0c5460; }
.action-update { background: #fff3cd; color: #856404; }
.action-delete { background: #f8d7da; color: #721c24; }
.action-system { background: #cce5ff; color: #004085; }
.action-pump-on { background: #d4edda; color: #155724; }
.action-pump-off { background: #f8d7da; color: #721c24; }
.action-heat-on { background: #fff3cd; color: #856404; }
.action-heat-off { background: #cce5ff; color: #004085; }
.action-pump-summary { background: #d1ecf1; color: #0c5460; }
.action-heat-summary { background: #fff3cd; color: #856404; }
.action-alert-summary { background: #f8d7da; color: #721c24; }

.activity-description {
    max-width: 300px;
    word-wrap: break-word;
}

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

.table-container {
    overflow-x: auto;
}

input[type="text"], input[type="password"], input[type="email"], input[type="date"], select {
    background: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius);
    padding: 10px 12px;
    color: var(--text-primary);
}
input:focus, select:focus { outline: none; border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(24,119,242,.18); }

.greeting { color: var(--text-secondary); margin: 0; }
.welcome-title { color: var(--text-primary); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--gray-100); }
::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--gray-medium); }

.pill { display:inline-block; padding:6px 10px; border-radius:999px; background:var(--primary-light); color:var(--primary-color); font-size:12px; }

.card-amount {
    min-height: 1.5em;
    display: flex;
    align-items: center;
    justify-content: center;
}

.loading {
    opacity: 0.7;
    pointer-events: none;
}