/* ============================================
   CHIDMANO DESIGN SYSTEM - World-Class UI/UX
   Version: 2.0 - Professional Grade
   ============================================ */

/* 1. DESIGN TOKENS - متغیرهای طراحی */
:root {
    /* Colors - Primary Palette */
    --color-primary-50: #eef2ff;
    --color-primary-100: #e0e7ff;
    --color-primary-200: #c7d2fe;
    --color-primary-300: #a5b4fc;
    --color-primary-400: #818cf8;
    --color-primary-500: #667eea;
    --color-primary-600: #5a67d8;
    --color-primary-700: #4c51bf;
    --color-primary-800: #434190;
    --color-primary-900: #3730a3;
    
    /* Colors - Secondary Palette */
    --color-secondary-50: #faf5ff;
    --color-secondary-100: #f3e8ff;
    --color-secondary-200: #e9d5ff;
    --color-secondary-300: #d8b4fe;
    --color-secondary-400: #c084fc;
    --color-secondary-500: #764ba2;
    --color-secondary-600: #9333ea;
    --color-secondary-700: #7e22ce;
    --color-secondary-800: #6b21a8;
    --color-secondary-900: #581c87;
    
    /* Colors - Neutral Palette */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Colors - Semantic */
    --color-success: #10b981;
    --color-success-light: #d1fae5;
    --color-success-dark: #065f46;
    --color-warning: #f59e0b;
    --color-warning-light: #fef3c7;
    --color-warning-dark: #92400e;
    --color-error: #ef4444;
    --color-error-light: #fee2e2;
    --color-error-dark: #991b1b;
    --color-info: #3b82f6;
    --color-info-light: #dbeafe;
    --color-info-dark: #1e40af;
    
    /* Typography Scale */
    --font-size-xs: 0.75rem;      /* 12px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-base: 1rem;       /* 16px */
    --font-size-lg: 1.125rem;     /* 18px */
    --font-size-xl: 1.25rem;      /* 20px */
    --font-size-2xl: 1.5rem;      /* 24px */
    --font-size-3xl: 1.875rem;    /* 30px */
    --font-size-4xl: 2.25rem;     /* 36px */
    --font-size-5xl: 3rem;        /* 48px */
    
    /* Font Weights */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    /* Line Heights */
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    --line-height-loose: 2;
    
    /* Spacing Scale */
    --spacing-0: 0;
    --spacing-1: 0.25rem;      /* 4px */
    --spacing-2: 0.5rem;       /* 8px */
    --spacing-3: 0.75rem;      /* 12px */
    --spacing-4: 1rem;         /* 16px */
    --spacing-5: 1.25rem;      /* 20px */
    --spacing-6: 1.5rem;       /* 24px */
    --spacing-8: 2rem;         /* 32px */
    --spacing-10: 2.5rem;      /* 40px */
    --spacing-12: 3rem;        /* 48px */
    --spacing-16: 4rem;        /* 64px */
    --spacing-20: 5rem;        /* 80px */
    
    /* Border Radius */
    --radius-none: 0;
    --radius-sm: 0.25rem;      /* 4px */
    --radius-md: 0.375rem;     /* 6px */
    --radius-lg: 0.5rem;       /* 8px */
    --radius-xl: 0.75rem;      /* 12px */
    --radius-2xl: 1rem;        /* 16px */
    --radius-3xl: 1.5rem;      /* 24px */
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* Z-Index Scale */
    --z-index-dropdown: 1000;
    --z-index-sticky: 1020;
    --z-index-fixed: 1030;
    --z-index-modal-backdrop: 1040;
    --z-index-modal: 1050;
    --z-index-popover: 1060;
    --z-index-tooltip: 1070;
    
    /* Container */
    --container-max-width: 1280px;
    --container-padding: 1.5rem;
}

/* 2. RESET & BASE STYLES */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    scroll-behavior: smooth;
}

body {
    font-family: 'Vazirmatn', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-gray-900);
    background-color: var(--color-gray-50);
    min-height: 100vh;
    overflow-x: hidden;
}

/* 3. TYPOGRAPHY */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-4);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
    margin-bottom: var(--spacing-4);
    color: var(--color-gray-700);
}

a {
    color: var(--color-primary-500);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-600);
}

/* 4. LAYOUT COMPONENTS */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--container-padding);
}

/* 5. BUTTONS - World Class */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-normal);
    border: none;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 600ms, height 600ms;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary-500) 0%, var(--color-secondary-500) 100%);
    color: white;
    box-shadow: var(--shadow-md), 0 0 0 0 rgba(102, 126, 234, 0.7);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(102, 126, 234, 0.4);
}

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

.btn-secondary {
    background: white;
    color: var(--color-gray-700);
    border: 2px solid var(--color-gray-300);
}

.btn-secondary:hover {
    background: var(--color-gray-50);
    border-color: var(--color-primary-500);
    color: var(--color-primary-500);
    transform: translateY(-2px);
}

.btn-success {
    background: linear-gradient(135deg, var(--color-success) 0%, #059669 100%);
    color: white;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(16, 185, 129, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, var(--color-error) 0%, #dc2626 100%);
    color: white;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(239, 68, 68, 0.4);
}

.btn-lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-lg);
    border-radius: var(--radius-2xl);
}

.btn-sm {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
    border-radius: var(--radius-lg);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* 6. CARDS - Premium */
.card {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary-500), var(--color-secondary-500));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary-200);
}

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

.card-header {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-4);
    padding-bottom: var(--spacing-3);
    border-bottom: 2px solid var(--color-gray-100);
}

.card-body {
    color: var(--color-gray-700);
}

.card-footer {
    margin-top: var(--spacing-4);
    padding-top: var(--spacing-4);
    border-top: 1px solid var(--color-gray-200);
}

/* 7. FORMS - Premium */
.form-group {
    margin-bottom: var(--spacing-5);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-2);
}

.form-label .required {
    color: var(--color-error);
    margin-right: var(--spacing-1);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-base);
    font-family: inherit;
    color: var(--color-gray-900);
    background: white;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px var(--color-primary-100);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-gray-400);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-4) center;
    padding-right: var(--spacing-10);
}

.form-error {
    color: var(--color-error);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-2);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.form-success {
    color: var(--color-success);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-2);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

/* 8. ALERTS - Premium */
.alert {
    padding: var(--spacing-4) var(--spacing-5);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-4);
    border-right: 4px solid;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    animation: slideInRight 0.3s ease;
}

.alert-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    margin-top: 2px;
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-1);
}

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

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

.alert-error {
    background: var(--color-error-light);
    border-right-color: var(--color-error);
    color: var(--color-error-dark);
}

.alert-info {
    background: var(--color-info-light);
    border-right-color: var(--color-info);
    color: var(--color-info-dark);
}

/* 9. LOADING STATES - Skeleton Screens */
.skeleton {
    background: linear-gradient(90deg, var(--color-gray-200) 25%, var(--color-gray-100) 50%, var(--color-gray-200) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-lg);
}

.skeleton-text {
    height: 1em;
    margin-bottom: var(--spacing-2);
}

.skeleton-title {
    height: 2em;
    width: 60%;
    margin-bottom: var(--spacing-4);
}

.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
}

.skeleton-image {
    width: 100%;
    height: 200px;
    border-radius: var(--radius-xl);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-gray-200);
    border-top-color: var(--color-primary-500);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

.spinner-lg {
    width: 60px;
    height: 60px;
    border-width: 4px;
}

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

/* Progress Bar */
.progress {
    width: 100%;
    height: 8px;
    background: var(--color-gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary-500), var(--color-secondary-500));
    border-radius: var(--radius-full);
    transition: width var(--transition-base);
    position: relative;
    overflow: hidden;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* 10. EMPTY STATES */
.empty-state {
    text-align: center;
    padding: var(--spacing-16) var(--spacing-8);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-6);
    opacity: 0.5;
}

.empty-state-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-3);
}

.empty-state-description {
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-6);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* 11. SUCCESS ANIMATIONS */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.animate-fade-in {
    animation: fadeIn 0.3s ease;
}

.animate-slide-up {
    animation: slideInUp 0.4s ease;
}

.animate-scale-in {
    animation: scaleIn 0.3s ease;
}

.animate-bounce {
    animation: bounce 1s infinite;
}

.animate-pulse {
    animation: pulse 2s infinite;
}

.animate-shake {
    animation: shake 0.5s ease;
}

/* 12. MICRO-INTERACTIONS */
.hover-lift {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.hover-scale {
    transition: transform var(--transition-base);
}

.hover-scale:hover {
    transform: scale(1.05);
}

.hover-glow {
    transition: box-shadow var(--transition-base);
}

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.4);
}

/* Ripple Effect */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 600ms, height 600ms;
}

.ripple:active::after {
    width: 300px;
    height: 300px;
}

/* 13. PAGE TRANSITIONS */
.page-transition {
    animation: fadeIn 0.4s ease;
}

/* 14. DARK MODE */
@media (prefers-color-scheme: dark) {
    :root {
        --color-gray-50: #1f2937;
        --color-gray-100: #374151;
        --color-gray-200: #4b5563;
        --color-gray-300: #6b7280;
        --color-gray-400: #9ca3af;
        --color-gray-500: #d1d5db;
        --color-gray-600: #e5e7eb;
        --color-gray-700: #f3f4f6;
        --color-gray-800: #f9fafb;
        --color-gray-900: #ffffff;
    }
    
    body {
        background: var(--color-gray-900);
        color: var(--color-gray-100);
    }
    
    .card {
        background: var(--color-gray-800);
        border-color: var(--color-gray-700);
    }
    
    .form-input,
    .form-textarea,
    .form-select {
        background: var(--color-gray-700);
        border-color: var(--color-gray-600);
        color: var(--color-gray-100);
    }
}

/* Manual Dark Mode Toggle */
body.dark-mode {
    --color-gray-50: #1f2937;
    --color-gray-100: #374151;
    --color-gray-200: #4b5563;
    --color-gray-300: #6b7280;
    --color-gray-400: #9ca3af;
    --color-gray-500: #d1d5db;
    --color-gray-600: #e5e7eb;
    --color-gray-700: #f3f4f6;
    --color-gray-800: #f9fafb;
    --color-gray-900: #ffffff;
}

body.dark-mode {
    background: var(--color-gray-900);
    color: var(--color-gray-100);
}

body.dark-mode .card {
    background: var(--color-gray-800);
    border-color: var(--color-gray-700);
}

body.dark-mode .form-input,
body.dark-mode .form-textarea,
body.dark-mode .form-select {
    background: var(--color-gray-700);
    border-color: var(--color-gray-600);
    color: var(--color-gray-100);
}

/* 15. ACCESSIBILITY */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary-500);
    color: white;
    padding: var(--spacing-3) var(--spacing-4);
    z-index: var(--z-index-tooltip);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

/* Focus Styles */
*:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

/* 16. RESPONSIVE UTILITIES */
@media (max-width: 1200px) {
    :root {
        --container-max-width: 960px;
    }
}

@media (max-width: 992px) {
    :root {
        --container-max-width: 720px;
    }
}

@media (max-width: 768px) {
    :root {
        --container-max-width: 100%;
        --container-padding: var(--spacing-4);
    }
    
    h1 { font-size: var(--font-size-3xl); }
    h2 { font-size: var(--font-size-2xl); }
    h3 { font-size: var(--font-size-xl); }
}

@media (max-width: 480px) {
    :root {
        --container-padding: var(--spacing-3);
    }
    
    .btn {
        padding: var(--spacing-2) var(--spacing-4);
        font-size: var(--font-size-sm);
    }
}

/* 17. UTILITY CLASSES */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.p-1 { padding: var(--spacing-1); }
.p-2 { padding: var(--spacing-2); }
.p-3 { padding: var(--spacing-3); }
.p-4 { padding: var(--spacing-4); }
.p-6 { padding: var(--spacing-6); }
.p-8 { padding: var(--spacing-8); }

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

.gap-1 { gap: var(--spacing-1); }
.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }

.rounded { border-radius: var(--radius-lg); }
.rounded-lg { border-radius: var(--radius-xl); }
.rounded-xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

.shadow { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* 18. PRINT STYLES */
@media print {
    .header,
    .footer,
    .no-print {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }
}

/* 19. ANIMATIONS FOR SCROLL */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* 20. TOOLTIPS */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: var(--spacing-2) var(--spacing-3);
    background: var(--color-gray-900);
    color: white;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-lg);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
    z-index: var(--z-index-tooltip);
}

.tooltip:hover::after {
    opacity: 1;
}

/* 21. BADGES */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    background: var(--color-primary-100);
    color: var(--color-primary-700);
}

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

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

.badge-error {
    background: var(--color-error-light);
    color: var(--color-error-dark);
}

.badge-info {
    background: var(--color-info-light);
    color: var(--color-info-dark);
}

/* 22. AVATARS */
.avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 3px solid white;
    box-shadow: var(--shadow-md);
}

.avatar-sm {
    width: 32px;
    height: 32px;
}

.avatar-lg {
    width: 64px;
    height: 64px;
}

.avatar-xl {
    width: 96px;
    height: 96px;
}

/* 23. DIVIDERS */
.divider {
    height: 1px;
    background: var(--color-gray-200);
    margin: var(--spacing-6) 0;
    border: none;
}

.divider-vertical {
    width: 1px;
    height: 100%;
    background: var(--color-gray-200);
    margin: 0 var(--spacing-4);
}

/* 24. NOTIFICATIONS */
.notification {
    position: fixed;
    top: var(--spacing-6);
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    padding: var(--spacing-4) var(--spacing-6);
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    z-index: var(--z-index-modal);
    opacity: 0;
    transition: all var(--transition-spring);
    max-width: 90vw;
}

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

.notification-success {
    border-right: 4px solid var(--color-success);
}

.notification-error {
    border-right: 4px solid var(--color-error);
}

.notification-warning {
    border-right: 4px solid var(--color-warning);
}

.notification-info {
    border-right: 4px solid var(--color-info);
}

/* 25. MODALS */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: var(--z-index-modal-backdrop);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.modal-backdrop.show {
    opacity: 1;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--spacing-8);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    z-index: var(--z-index-modal);
    opacity: 0;
    transition: all var(--transition-spring);
}

.modal.show {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-6);
    padding-bottom: var(--spacing-4);
    border-bottom: 1px solid var(--color-gray-200);
}

.modal-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    color: var(--color-gray-500);
    transition: color var(--transition-fast);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
}

.modal-close:hover {
    color: var(--color-gray-900);
    background: var(--color-gray-100);
}

/* 26. TABS */
.tabs {
    display: flex;
    gap: var(--spacing-2);
    border-bottom: 2px solid var(--color-gray-200);
    margin-bottom: var(--spacing-6);
}

.tab {
    padding: var(--spacing-3) var(--spacing-5);
    background: none;
    border: none;
    color: var(--color-gray-600);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    position: relative;
    transition: color var(--transition-fast);
}

.tab::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary-500);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.tab:hover {
    color: var(--color-primary-500);
}

.tab.active {
    color: var(--color-primary-500);
}

.tab.active::after {
    transform: scaleX(1);
}

/* 27. ACCORDION */
.accordion {
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.accordion-item {
    border-bottom: 1px solid var(--color-gray-200);
}

.accordion-item:last-child {
    border-bottom: none;
}

.accordion-header {
    width: 100%;
    padding: var(--spacing-4) var(--spacing-5);
    background: white;
    border: none;
    text-align: right;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background var(--transition-fast);
}

.accordion-header:hover {
    background: var(--color-gray-50);
}

.accordion-icon {
    transition: transform var(--transition-base);
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
}

.accordion-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base), padding var(--transition-base);
}

.accordion-item.active .accordion-body {
    max-height: 500px;
    padding: 0 var(--spacing-5) var(--spacing-5);
}

/* 28. BREADCRUMBS */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) 0;
    font-size: var(--font-size-sm);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--color-gray-600);
}

.breadcrumb-item a {
    color: var(--color-gray-600);
}

.breadcrumb-item a:hover {
    color: var(--color-primary-500);
}

.breadcrumb-separator {
    color: var(--color-gray-400);
}

.breadcrumb-item.active {
    color: var(--color-gray-900);
    font-weight: var(--font-weight-medium);
}

/* 29. PAGINATION */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-6) 0;
}

.pagination-item {
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    background: white;
    border: 1px solid var(--color-gray-200);
    color: var(--color-gray-700);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.pagination-item:hover {
    background: var(--color-primary-50);
    border-color: var(--color-primary-500);
    color: var(--color-primary-500);
}

.pagination-item.active {
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-secondary-500));
    color: white;
    border-color: transparent;
}

.pagination-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 30. SKILL BARS */
.skill-bar {
    margin-bottom: var(--spacing-4);
}

.skill-bar-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-2);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

.skill-bar-track {
    height: 8px;
    background: var(--color-gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.skill-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary-500), var(--color-secondary-500));
    border-radius: var(--radius-full);
    transition: width 1s ease;
}

/* 31. COUNTER ANIMATION */
.counter {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-extrabold);
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-secondary-500));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 32. TESTIMONIALS */
.testimonial {
    background: white;
    padding: var(--spacing-6);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-gray-200);
    position: relative;
}

.testimonial::before {
    content: '"';
    position: absolute;
    top: var(--spacing-4);
    left: var(--spacing-6);
    font-size: 4rem;
    color: var(--color-primary-200);
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial-text {
    font-size: var(--font-size-lg);
    font-style: italic;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-4);
    padding-left: var(--spacing-8);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.testimonial-author-info {
    flex: 1;
}

.testimonial-author-name {
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
}

.testimonial-author-role {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

/* 33. PRICING TABLES */
.pricing-card {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-md);
    border: 2px solid var(--color-gray-200);
    transition: all var(--transition-base);
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.pricing-card.featured {
    border-color: var(--color-primary-500);
    transform: scale(1.05);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-8px);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-secondary-500));
    color: white;
    padding: var(--spacing-1) var(--spacing-4);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
}

.pricing-header {
    text-align: center;
    margin-bottom: var(--spacing-6);
}

.pricing-name {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-2);
}

.pricing-price {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-extrabold);
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-secondary-500));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pricing-currency {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-normal);
}

.pricing-period {
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--spacing-6);
}

.pricing-features li {
    padding: var(--spacing-2) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--color-gray-700);
}

.pricing-features li::before {
    content: '✓';
    color: var(--color-success);
    font-weight: var(--font-weight-bold);
}

.pricing-cta {
    width: 100%;
}

/* 34. STATS */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-6);
    margin: var(--spacing-8) 0;
}

.stat-card {
    background: white;
    padding: var(--spacing-6);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.stat-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-3);
}

.stat-value {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-extrabold);
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-secondary-500));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-2);
}

.stat-label {
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    font-weight: var(--font-weight-medium);
}

/* 35. TIMELINE */
.timeline {
    position: relative;
    padding: var(--spacing-6) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    right: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-gray-200);
    transform: translateX(50%);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-8);
}

.timeline-marker {
    position: absolute;
    right: 50%;
    top: 0;
    width: 16px;
    height: 16px;
    background: var(--color-primary-500);
    border: 4px solid white;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
    transform: translateX(50%);
    z-index: 1;
}

.timeline-content {
    background: white;
    padding: var(--spacing-5);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    width: calc(50% - var(--spacing-8));
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: calc(50% + var(--spacing-8));
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: calc(50% + var(--spacing-8));
}

@media (max-width: 768px) {
    .timeline::before {
        right: var(--spacing-4);
    }
    
    .timeline-marker {
        right: var(--spacing-4);
    }
    
    .timeline-content {
        width: calc(100% - var(--spacing-12));
        margin-right: var(--spacing-12) !important;
        margin-left: 0 !important;
    }
}

/* 36. FOOTER ENHANCEMENTS */
.footer {
    background: white;
    color: var(--color-gray-700);
    padding: var(--spacing-16) 0 var(--spacing-8);
    margin-top: auto;
    border-top: 1px solid var(--color-gray-200);
}

.footer h5 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-4);
}

.footer a {
    color: var(--color-gray-600);
    text-decoration: none;
    transition: all var(--transition-fast);
    display: inline-block;
    padding: var(--spacing-1) 0;
}

.footer a:hover {
    color: var(--color-primary-500);
    transform: translateX(-4px);
}

.footer-bottom {
    margin-top: var(--spacing-8);
    padding-top: var(--spacing-6);
    border-top: 1px solid var(--color-gray-200);
    text-align: center;
    color: var(--color-gray-600);
}

/* 37. HEADER ENHANCEMENTS */
.header {
    background: linear-gradient(135deg, var(--color-primary-500) 0%, var(--color-secondary-500) 100%);
    color: white;
    padding: 0;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: var(--z-index-sticky);
    backdrop-filter: blur(10px);
}

.header-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.logo-img {
    width: 45px;
    height: 45px;
    border-radius: var(--radius-lg);
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
}

.navigation {
    display: flex;
    gap: var(--spacing-1);
    align-items: center;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    font-weight: var(--font-weight-medium);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    right: 50%;
    height: 2px;
    background: white;
    transition: all var(--transition-base);
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.nav-link:hover::after {
    left: 25%;
    right: 25%;
}

/* 38. HERO SECTION */
.hero {
    background: linear-gradient(135deg, var(--color-primary-500) 0%, var(--color-secondary-500) 100%);
    color: white;
    padding: var(--spacing-20) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,138.7C960,139,1056,117,1152,122.7C1248,128,1344,160,1392,176L1440,192L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>');
    background-size: cover;
    background-position: bottom;
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-extrabold);
    margin-bottom: var(--spacing-6);
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-8);
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-cta {
    animation: fadeInUp 0.8s ease 0.4s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 39. GRADIENTS */
.gradient-primary {
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-secondary-500));
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-secondary-500));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 40. CUSTOM SCROLLBAR */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--color-gray-100);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-secondary-500));
    border-radius: var(--radius-full);
    border: 3px solid var(--color-gray-100);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--color-primary-600), var(--color-secondary-600));
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--color-primary-500) var(--color-gray-100);
}