/**
 * MyOstad Modern UI System - 2026 Edition
 * فایل: assets/css/aura-ui-v2.css
 * نسخه: 2.0.0 | Mobile-First | WCAG 2.1 AA Compliant
 * 
 * ویژگی‌های جدید:
 * - Dark/Light Mode Complete Coverage
 * - Accessibility (a11y) Best Practices
 * - Performance Optimized (CSS-only animations)
 * - Responsive Breakpoints (Mobile/Tablet/Desktop/Wide)
 * - Semantic HTML Classes
 * - CSS Custom Properties (CSS Variables)
 * - Smooth Transitions & Micro-interactions
 * 
 * @author MyOstad Design Team
 * @package myostad
 */

/* ============================================================================
   🔧 CRITICAL FIX: Alpine.js x-cloak (برای جلوگیری از FOUC)
   ============================================================================ */

/**
 * این استایل باعث می‌شود المان‌های با x-cloak تا زمان لود شدن Alpine.js
 * مخفی بمانند و از "پرش محتوا" (Flash of Unstyled Content) جلوگیری شود
 */
[x-cloak] { 
    display: none !important; 
}

/* ============================================================================
   سطح ۰: CSS Reset + Variables + Utilities
   ============================================================================ */

:root {
    /* ==================
       رنگ‌ها - حالت روشن
       ================== */
    
    /* Primary Colors - آبی‌های تمرکز */
    --color-primary: #2563eb;
    --color-primary-50: #eff6ff;
    --color-primary-100: #dbeafe;
    --color-primary-200: #bfdbfe;
    --color-primary-300: #93c5fd;
    --color-primary-400: #60a5fa;
    --color-primary-500: #3b82f6;
    --color-primary-600: #2563eb;
    --color-primary-700: #1d4ed8;
    --color-primary-800: #1e40af;
    --color-primary-900: #1e3a8a;
    
    /* Secondary Colors - ایندیگو برای برندینگ */
    --color-secondary: #4f46e5;
    --color-secondary-light: #e0e7ff;
    --color-secondary-dark: #312e81;
    
    /* Accent Colors */
    --color-accent: #f59e0b;     /* Amber - Premium */
    --color-success: #10b981;    /* Green - Success */
    --color-danger: #ef4444;     /* Red - Danger */
    --color-warning: #f59e0b;    /* Amber - Warning */
    --color-info: #06b6d4;       /* Cyan - Info */
    
    /* Neutral Colors - طیف خاکستری */
    --color-bg-light: #ffffff;
    --color-bg: #f8fafc;
    --color-bg-secondary: #f1f5f9;
    --color-surface: #ffffff;
    --color-surface-variant: #f8fafc;
    
    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-text-tertiary: #64748b;
    --color-text-disabled: #cbd5e1;
    
    --color-border-light: #e2e8f0;
    --color-border: #cbd5e1;
    --color-border-dark: #94a3b8;
    
    --color-overlay: rgba(15, 23, 42, 0.5);
    --color-overlay-dark: rgba(15, 23, 42, 0.8);
    
    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-blur: 12px;
    
    /* ==================
       Typography
       ================== */
    --font-family-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 
                        'Vazirmatn', 'Tahoma', sans-serif;
    --font-family-mono: 'Fira Code', 'Courier New', monospace;
    
    --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-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    --font-weight-black: 900;
    
    --line-height-tight: 1.25;
    --line-height-snug: 1.375;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;
    --line-height-loose: 2;
    
    /* ==================
       Spacing System
       ================== */
    --space-0: 0;
    --space-px: 1px;
    --space-0-5: 0.125rem;   /* 2px */
    --space-1: 0.25rem;      /* 4px */
    --space-1-5: 0.375rem;   /* 6px */
    --space-2: 0.5rem;       /* 8px */
    --space-2-5: 0.625rem;   /* 10px */
    --space-3: 0.75rem;      /* 12px */
    --space-3-5: 0.875rem;   /* 14px */
    --space-4: 1rem;         /* 16px */
    --space-5: 1.25rem;      /* 20px */
    --space-6: 1.5rem;       /* 24px */
    --space-7: 1.75rem;      /* 28px */
    --space-8: 2rem;         /* 32px */
    --space-9: 2.25rem;      /* 36px */
    --space-10: 2.5rem;      /* 40px */
    --space-12: 3rem;        /* 48px */
    --space-16: 4rem;        /* 64px */
    
    /* ==================
       Border Radius
       ================== */
    --radius-none: 0;
    --radius-sm: 0.25rem;     /* 4px */
    --radius-base: 0.375rem;  /* 6px */
    --radius-md: 0.5rem;      /* 8px */
    --radius-lg: 0.75rem;     /* 12px */
    --radius-xl: 1rem;        /* 16px */
    --radius-2xl: 1.5rem;     /* 24px */
    --radius-3xl: 2rem;       /* 32px */
    --radius-full: 9999px;    /* Pill shape */
    
    /* ==================
       Shadows
       ================== */
    --shadow-none: 0 0 0 0 rgba(0, 0, 0, 0);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-base: 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
       ================== */
    --duration-75: 75ms;
    --duration-100: 100ms;
    --duration-150: 150ms;
    --duration-200: 200ms;
    --duration-300: 300ms;
    --duration-500: 500ms;
    --duration-700: 700ms;
    --duration-1000: 1000ms;
    
    --timing-linear: linear;
    --timing-in: cubic-bezier(0.4, 0, 1, 1);
    --timing-out: cubic-bezier(0, 0, 0.2, 1);
    --timing-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --timing-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* ==================
       Z-Index Scale
       ================== */
    --z-hide: -1;
    --z-base: 0;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
    --z-notification: 800;
    --z-story-overlay: 9999; /* 🔧 FIX: برای استوری‌ها باید بالاترین باشد */
    
    /* ==================
       Responsive Breakpoints
       ================== */
    --bp-xs: 320px;
    --bp-sm: 640px;
    --bp-md: 768px;
    --bp-lg: 1024px;
    --bp-xl: 1280px;
    --bp-2xl: 1536px;
}

/* ============================================================================
   حالت تاریک (Dark Mode)
   ============================================================================ */

[data-theme="dark"] {
    color-scheme: dark;
    
    /* Background Colors */
    --color-bg-light: #0f172a;
    --color-bg: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-surface: #1e293b;
    --color-surface-variant: #0f172a;
    
    /* Text Colors */
    --color-text-primary: #f1f5f9;
    --color-text-secondary: #cbd5e1;
    --color-text-tertiary: #94a3b8;
    --color-text-disabled: #475569;
    
    /* Border Colors */
    --color-border-light: #334155;
    --color-border: #475569;
    --color-border-dark: #64748b;
    
    /* Overlay */
    --color-overlay: rgba(15, 23, 42, 0.7);
    --color-overlay-dark: rgba(0, 0, 0, 0.9);
    
    /* Glass Effect */
    --glass-bg: rgba(30, 41, 59, 0.8);
    --glass-border: rgba(255, 255, 255, 0.05);
    
    /* Colors remain same for primary/secondary/accent */
    --color-primary-50: #001d3d;
    --color-primary-100: #003d6b;
    --color-secondary-light: #1e1b4b;
}

/* ============================================================================
   CSS Reset + Base Styles
   ============================================================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-family: var(--font-family-sans);
    font-size: 100%;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: var(--line-height-normal);
    font-weight: var(--font-weight-normal);
    direction: rtl;
    transition: background-color var(--duration-300) var(--timing-out);
    overflow-x: hidden;
}

/* ============================================================================
   Typography + Forms
   ============================================================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    letter-spacing: -0.02em;
}

h1 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-6);
}

h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-5);
}

h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-4);
}

p {
    margin-bottom: var(--space-4);
    color: var(--color-text-secondary);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--duration-200) var(--timing-out);
}

a:hover {
    color: var(--color-primary-700);
    text-decoration: underline;
}

a:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* ============================================================================
   Utility Classes
   ============================================================================ */

/* Screen Reader Only */
.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;
}

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

/* Disabled State */
:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Selection */
::selection {
    background-color: var(--color-primary-100);
    color: var(--color-primary-900);
}

[data-theme="dark"] ::selection {
    background-color: var(--color-primary-900);
    color: var(--color-primary-50);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-border-dark);
}

/* ============================================================================
   سطح ۱: Container + Grid + Layout
   ============================================================================ */

.container {
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

@media (min-width: var(--bp-sm)) {
    .container {
        max-width: 640px;
    }
}

@media (min-width: var(--bp-md)) {
    .container {
        max-width: 768px;
        padding-left: var(--space-6);
        padding-right: var(--space-6);
    }
}

@media (min-width: var(--bp-lg)) {
    .container {
        max-width: 1024px;
    }
}

@media (min-width: var(--bp-xl)) {
    .container {
        max-width: 1280px;
    }
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-4);
}

.grid-cols-1 { grid-template-columns: 1fr; }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (min-width: var(--bp-md)) {
    .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: var(--bp-lg)) {
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* Flexbox Utilities */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.flex-row {
    flex-direction: row;
}

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }

.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* ============================================================================
   سطح ۲: Cards + Surface Components
   ============================================================================ */

.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-4);
    transition: all var(--duration-200) var(--timing-out);
    box-shadow: var(--shadow-sm);
}

.card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-border);
}

.card-elevated {
    box-shadow: var(--shadow-lg);
}

.card-outlined {
    border: 2px solid var(--color-border);
    box-shadow: none;
}

.card-filled {
    background-color: var(--color-bg-secondary);
    border: none;
}

/* Card Header/Body/Footer */
.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-border-light);
    margin-bottom: var(--space-4);
}

.card-body {
    padding: var(--space-4) 0;
}

.card-footer {
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border-light);
    margin-top: var(--space-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}

/* Surface Cards */
.surface {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
}

.surface-light {
    background-color: var(--color-bg);
}

/* ============================================================================
   سطح ۳: Buttons
   ============================================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2-5) var(--space-4);
    border: none;
    border-radius: var(--radius-lg);
    font-family: var(--font-family-sans);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-normal);
    text-align: center;
    cursor: pointer;
    transition: all var(--duration-200) var(--timing-out);
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
}

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

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Sizes */
.btn-xs {
    padding: var(--space-1) var(--space-2);
    font-size: var(--font-size-xs);
}

.btn-sm {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
}

.btn-md {
    padding: var(--space-2-5) var(--space-4);
    font-size: var(--font-size-base);
}

.btn-lg {
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-lg);
}

.btn-full {
    width: 100%;
}

/* Variants */
.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(37, 99, 235, 0.4);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

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

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

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

.btn-success:hover:not(:disabled) {
    background-color: #059669;
}

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

.btn-danger:hover:not(:disabled) {
    background-color: #dc2626;
}

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
    background-color: var(--color-primary-50);
}

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

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

.btn-link {
    background: none;
    color: var(--color-primary);
    padding: 0;
    text-decoration: underline;
}

.btn-link:hover:not(:disabled) {
    color: var(--color-primary-700);
    text-decoration: none;
}

/* Icon-only buttons */
.btn-icon {
    padding: var(--space-2);
    border-radius: var(--radius-full);
}

/* ============================================================================
   سطح ۴: Form Elements
   ============================================================================ */

.form-group {
    margin-bottom: var(--space-6);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
    line-height: var(--line-height-normal);
}

.form-label.required::after {
    content: ' *';
    color: var(--color-danger);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-2-5) var(--space-3);
    font-family: var(--font-family-sans);
    font-size: var(--font-size-base);
    border: 2px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    transition: all var(--duration-200) var(--timing-out);
    appearance: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: var(--color-surface);
    box-shadow: 0 0 0 3px var(--color-primary-50);
}

.form-input::placeholder {
    color: var(--color-text-tertiary);
}

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

.form-select {
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='%232563eb' viewBox='0 0 20 20'%3E%3Cpath fill-rule='evenodd' d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z' clip-rule='evenodd'/%3E%3C/svg%3E");
    background-position: right var(--space-3) center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: var(--space-10);
}

/* Form State */
.form-input.error,
.form-textarea.error,
.form-select.error {
    border-color: var(--color-danger);
}

.form-input.error:focus,
.form-textarea.error:focus,
.form-select.error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

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

.form-input.success:focus,
.form-textarea.success:focus,
.form-select.success:focus {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

/* Error/Help Text */
.form-error {
    font-size: var(--font-size-sm);
    color: var(--color-danger);
    margin-top: var(--space-1);
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.form-help {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    margin-top: var(--space-1);
}

/* Checkbox & Radio */
.form-checkbox,
.form-radio {
    width: 1.25rem;
    height: 1.25rem;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.checkbox-group,
.radio-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.checkbox-item,
.radio-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
}

/* ============================================================================
   سطح ۵: Navigation & Menu
   ============================================================================ */

.navbar {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border-light);
    padding: var(--space-4) 0;
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    backdrop-filter: blur(var(--glass-blur));
    background-color: var(--glass-bg);
}

.navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.navbar-brand {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    text-decoration: none;
}

.navbar-nav {
    display: flex;
    list-style: none;
    gap: var(--space-6);
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--duration-200) var(--timing-out);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -var(--space-1);
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
}

/* Floating Action Bar (NAV) */
.floating-nav {
    position: fixed;
    bottom: var(--space-5);
    left: var(--space-4);
    right: var(--space-4);
    height: 72px;
    z-index: var(--z-fixed);
    display: flex;
    align-items: center;
    justify-content: space-around;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-3xl);
    box-shadow: var(--shadow-xl);
    max-width: calc(100% - var(--space-8));
    margin-left: auto;
    margin-right: auto;
}

@media (min-width: var(--bp-lg)) {
    .floating-nav {
        max-width: 600px;
        left: 50%;
        right: auto;
        transform: translateX(-50%);
    }
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    color: var(--color-text-tertiary);
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--duration-200) var(--timing-bounce);
    text-decoration: none;
}

.nav-item:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.nav-item.active {
    color: var(--color-primary);
    background-color: var(--color-primary-50);
    transform: scale(1.1);
}

.nav-item svg {
    width: 28px;
    height: 28px;
    transition: transform var(--duration-300) var(--timing-out);
}

.nav-item.active svg {
    transform: translateY(-3px);
}

.nav-item-label {
    font-size: var(--font-size-xs);
    margin-top: var(--space-1);
    font-weight: var(--font-weight-semibold);
    text-align: center;
    max-width: 60px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ============================================================================
   سطح ۶: Modals & Overlays
   ============================================================================ */

.modal-overlay {
    position: fixed;
    inset: 0;
    background-color: var(--color-overlay-dark);
    backdrop-filter: blur(var(--glass-blur));
    display: flex;
    align-items: flex-end;
    justify-content: center;
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-300) var(--timing-out);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--color-surface);
    width: 100%;
    max-width: 500px;
    border-radius: var(--radius-3xl) var(--radius-3xl) 0 0;
    padding: var(--space-6);
    transform: translateY(100%);
    transition: transform var(--duration-400) var(--timing-bounce);
    max-height: 90vh;
    overflow-y: auto;
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

@media (min-width: var(--bp-md)) {
    .modal-content {
        border-radius: var(--radius-2xl);
        position: absolute;
        bottom: auto;
        top: 50%;
        transform: translateY(-50%);
        max-height: none;
    }
    
    .modal-overlay.active .modal-content {
        transform: translateY(-50%);
    }
}

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

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

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    color: var(--color-text-tertiary);
    transition: color var(--duration-200) var(--timing-out);
}

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

/* ============================================================================
   سطح ۷: Social Features (Feed Cards, Stories, Chat)
   ============================================================================ */

.feed-container {
    max-width: 600px;
    margin: 0 auto;
    padding: var(--space-4);
    gap: var(--space-4);
    display: flex;
    flex-direction: column;
}

/* Feed Card */
.feed-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border-light);
    overflow: hidden;
    transition: all var(--duration-200) var(--timing-out);
    box-shadow: var(--shadow-sm);
}

.feed-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-border);
}

/* Card Header with Author Info */
.feed-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border-light);
}

.author-info {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex: 1;
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 2px solid var(--color-border-light);
}

.author-meta {
    display: flex;
    flex-direction: column;
    gap: var(--space-0-5);
}

.author-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.author-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-0-5);
    font-size: var(--font-size-xs);
    padding: 2px 6px;
    border-radius: var(--radius-full);
    background-color: var(--color-primary-50);
    color: var(--color-primary-700);
    font-weight: var(--font-weight-bold);
}

[data-theme="dark"] .author-badge {
    background-color: var(--color-primary-900);
    color: var(--color-primary-200);
}

.post-time {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

/* Card Body */
.feed-card-body {
    padding: var(--space-4);
}

.post-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-2);
    line-height: var(--line-height-snug);
}

.post-excerpt {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: var(--line-height-normal);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: var(--space-3);
}

.post-media {
    width: 100%;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-3);
    max-height: 400px;
    object-fit: cover;
}

/* Card Footer with Actions */
.feed-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding: var(--space-3) var(--space-4);
    border-top: 1px solid var(--color-border-light);
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-1);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-tertiary);
    cursor: pointer;
    transition: all var(--duration-200) var(--timing-out);
    flex: 1;
    padding: var(--space-2);
}

.action-btn:hover {
    color: var(--color-primary);
    background-color: var(--color-primary-50);
}

.action-btn.active {
    color: var(--color-primary);
}

.action-btn svg {
    width: 20px;
    height: 20px;
    transition: transform var(--duration-200) var(--timing-bounce);
}

.action-btn:active svg {
    transform: scale(1.2);
}

/* Stories Container */
.stories-container {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-4);
    overflow-x: auto;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.stories-container::-webkit-scrollbar {
    display: none;
}

.story-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    min-width: 80px;
    cursor: pointer;
    text-align: center;
}

.story-ring {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    padding: 3px;
    background: linear-gradient(45deg, var(--color-accent), #f43f5e, var(--color-primary));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: transform var(--duration-200) var(--timing-out);
}

.story-ring.seen {
    background: var(--color-border-light);
}

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

.story-ring img {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-full);
    border: 3px solid var(--color-surface);
    object-fit: cover;
}

.story-label {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    max-width: 80px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--color-text-primary);
}

/* Chat Messages */
.chat-messages {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-4);
    height: 400px;
    overflow-y: auto;
}

.message {
    display: flex;
    max-width: 80%;
    animation: fadeInUp var(--duration-300) var(--timing-out);
}

.message.sent {
    align-self: flex-start;
}

.message.received {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message-bubble {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-2xl);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-normal);
    word-wrap: break-word;
    animation: popIn var(--duration-300) var(--timing-bounce);
}

.message.sent .message-bubble {
    background-color: var(--color-primary);
    color: white;
    border-radius: var(--radius-2xl) var(--radius-2xl) 4px var(--radius-2xl);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.message.received .message-bubble {
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-2xl) var(--radius-2xl) var(--radius-2xl) 4px;
}

.message-meta {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    margin-top: var(--space-1);
    text-align: center;
}

/* ============================================================================
   سطح ۸: Badges, Tags, Alerts
   ============================================================================ */

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-0-5) var(--space-2);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    white-space: nowrap;
}

.badge-primary {
    background-color: var(--color-primary-100);
    color: var(--color-primary-700);
}

.badge-success {
    background-color: #dcfce7;
    color: #166534;
}

.badge-danger {
    background-color: #fee2e2;
    color: #991b1b;
}

.badge-warning {
    background-color: #fef3c7;
    color: #92400e;
}

.badge-info {
    background-color: #cffafe;
    color: #164e63;
}

[data-theme="dark"] .badge-primary {
    background-color: var(--color-primary-900);
    color: var(--color-primary-200);
}

/* Alert Box */
.alert {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    border-left: 4px solid;
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
}

.alert-success {
    background-color: #dcfce7;
    border-color: var(--color-success);
    color: #166534;
}

.alert-error {
    background-color: #fee2e2;
    border-color: var(--color-danger);
    color: #991b1b;
}

.alert-warning {
    background-color: #fef3c7;
    border-color: var(--color-warning);
    color: #92400e;
}

.alert-info {
    background-color: #cffafe;
    border-color: var(--color-info);
    color: #164e63;
}

[data-theme="dark"] .alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: #86efac;
}

/* ============================================================================
   سطح ۹: Animations & Transitions
   ============================================================================ */

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

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

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

@keyframes popIn {
    0% {
        opacity: 0;
        transform: scale(0.8);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

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

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

.animate-fade {
    animation: fadeIn var(--duration-300) var(--timing-out) forwards;
}

.animate-fade-in-up {
    animation: fadeInUp var(--duration-500) var(--timing-out) forwards;
}

.animate-slide-in-right {
    animation: slideInRight var(--duration-300) var(--timing-out);
}

.animate-pulse {
    animation: pulse var(--duration-2s) var(--timing-linear) infinite;
}

.animate-spin {
    animation: spin 1s var(--timing-linear) infinite;
}

/* Loading Skeleton */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-border-light) 0%,
        var(--color-bg-secondary) 50%,
        var(--color-border-light) 100%
    );
    background-size: 200% 100%;
    animation: shimmer var(--duration-2s) var(--timing-linear) infinite;
    border-radius: var(--radius-lg);
}

.skeleton-text {
    height: 1em;
    border-radius: var(--radius-sm);
}

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

/* ============================================================================
   سطح ۱۰: Responsive Design
   ============================================================================ */

/* Tablet (md: 768px) */
@media (min-width: var(--bp-md)) {
    body {
        font-size: var(--font-size-base);
    }
    
    .floating-nav {
        position: relative;
        bottom: auto;
        left: auto;
        right: auto;
        margin: 0;
        margin-top: var(--space-6);
    }
}

/* Desktop (lg: 1024px) */
@media (min-width: var(--bp-lg)) {
    .grid { gap: var(--space-6); }
    .gap-4 { gap: var(--space-6); }
}

/* Large Desktop (xl: 1280px) */
@media (min-width: var(--bp-xl)) {
    h1 { font-size: var(--font-size-4xl); }
    h2 { font-size: var(--font-size-3xl); }
}

/* Print Styles */
@media print {
    .floating-nav,
    .navbar,
    .btn-icon,
    [aria-label="Close"] {
        display: none !important;
    }
    
    body {
        background-color: white;
        color: black;
    }
}

/* Prefers Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: more) {
    --color-border-light: var(--color-border-dark);
    --color-text-tertiary: var(--color-text-secondary);
}

/* ============================================================================
   سطح ۱۱: Accessibility Utilities
   ============================================================================ */

/* Focus Visible - Keyboard Navigation */
:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* Active State */
:active {
    opacity: 0.8;
}

/* Disabled State */
:disabled,
[aria-disabled="true"] {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Loading State */
[aria-busy="true"] {
    pointer-events: none;
    opacity: 0.6;
}

/* Error State */
[aria-invalid="true"] {
    border-color: var(--color-danger) !important;
}

/* Hidden but Accessible */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ============================================================================
   سطح ۱۲: Dark Mode Enhancements
   ============================================================================ */

[data-theme="dark"] .alert-success {
    background-color: rgba(16, 185, 129, 0.15);
}

[data-theme="dark"] .alert-error {
    background-color: rgba(239, 68, 68, 0.15);
}

[data-theme="dark"] .alert-warning {
    background-color: rgba(245, 158, 11, 0.15);
}

[data-theme="dark"] .alert-info {
    background-color: rgba(6, 182, 212, 0.15);
}

[data-theme="dark"] .btn-outline:hover:not(:disabled) {
    background-color: var(--color-primary-900);
}

[data-theme="dark"] .skeleton {
    background: linear-gradient(
        90deg,
        var(--color-border) 0%,
        var(--color-surface) 50%,
        var(--color-border) 100%
    );
}