/* ============================================
   NUVIDEO.AI DESIGN SYSTEM
   Unified Purple Theme Design System
   Version: 1.0
   ============================================ */

/* ============================================
   1. CSS VARIABLES & FOUNDATIONS
   ============================================ */

:root {
    /* Primary Purple Gradient System */
    --primary-gradient: linear-gradient(135deg, #6B21A8 0%, #A855F7 100%);
    --primary-gradient-hover: linear-gradient(135deg, #7C3AED 0%, #A855F7 100%);
    --primary-gradient-intense: linear-gradient(135deg, #6B21A8 0%, #7C3AED 25%, #9333EA 50%, #A855F7 75%, #C084FC 100%);

    /* Core Colors */
    --primary-color: #A855F7;
    --primary-dark: #6B21A8;
    --primary-light: #C084FC;
    --secondary-color: #7C3AED;
    --accent-color: #9333EA;

    /* Purple Palette */
    --purple-50: #FAF5FF;
    --purple-100: #F3E8FF;
    --purple-200: #E9D5FF;
    --purple-300: #D8B4FE;
    --purple-400: #C084FC;
    --purple-500: #A855F7;
    --purple-600: #9333EA;
    --purple-700: #7C3AED;
    --purple-800: #6B21A8;
    --purple-900: #581C87;
    --purple-950: #3B0764;

    /* Semantic Colors */
    --success: #10B981;
    --success-light: #34D399;
    --success-dark: #059669;
    --warning: #F59E0B;
    --warning-light: #FCD34D;
    --warning-dark: #D97706;
    --error: #EF4444;
    --error-light: #F87171;
    --error-dark: #DC2626;
    --info: #3B82F6;
    --info-light: #60A5FA;
    --info-dark: #2563EB;

    /* Neutral Colors */
    --neutral-50: #F9FAFB;
    --neutral-100: #F3F4F6;
    --neutral-200: #E5E7EB;
    --neutral-300: #D1D5DB;
    --neutral-400: #9CA3AF;
    --neutral-500: #6B7280;
    --neutral-600: #4B5563;
    --neutral-700: #374151;
    --neutral-800: #1F2937;
    --neutral-900: #111827;
    --neutral-950: #030712;

    /* Text Colors */
    --text-primary: #1F2937;
    --text-secondary: #4B5563;
    --text-muted: #6B7280;
    --text-light: #9CA3AF;
    --text-inverse: #FFFFFF;
    --text-on-primary: #FFFFFF;

    /* Background Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    --bg-card: #FFFFFF;
    --bg-overlay: rgba(0, 0, 0, 0.5);
    --bg-glass: rgba(255, 255, 255, 0.1);

    /* Border Colors */
    --border-light: #E5E7EB;
    --border-default: #D1D5DB;
    --border-dark: #9CA3AF;
    --border-focus: var(--primary-color);

    /* Shadow System */
    --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-purple: 0 10px 25px rgba(168, 85, 247, 0.15);
    --shadow-purple-lg: 0 20px 40px rgba(107, 33, 168, 0.2);

    /* Glow Effects */
    --glow-sm: 0 0 10px rgba(168, 85, 247, 0.3);
    --glow-md: 0 0 20px rgba(168, 85, 247, 0.4);
    --glow-lg: 0 0 30px rgba(168, 85, 247, 0.5);
    --glow-intense: 0 0 40px rgba(168, 85, 247, 0.6);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
    --transition-slower: 500ms ease-in-out;

    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;
    --font-arabic: 'Noto Sans Arabic', 'Segoe UI', Tahoma, sans-serif;
}

/* Dark Mode Variables (optional future enhancement) */
[data-theme="dark"] {
    --bg-primary: #111827;
    --bg-secondary: #1F2937;
    --bg-tertiary: #374151;
    --text-primary: #F9FAFB;
    --text-secondary: #E5E7EB;
    --text-muted: #9CA3AF;
    --border-light: #374151;
    --border-default: #4B5563;
}

/* ============================================
   2. GLOBAL STYLES & RESETS
   ============================================ */

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

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

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* RTL Support */
[dir="rtl"] body {
    font-family: var(--font-arabic);
}

/* Focus Styles */
:focus {
    outline: none;
}

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

/* Selection */
::selection {
    background-color: var(--primary-light);
    color: var(--text-inverse);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

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

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

/* ============================================
   3. TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

/* Brand .ai styling */
.brand-ai {
    color: var(--primary-color);
    font-weight: 900;
    background: linear-gradient(135deg, #A855F7 0%, #6B21A8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   4. LAYOUT UTILITIES
   ============================================ */

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

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-3xl) 0;
}

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

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

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

/* Grid Utilities */
.grid {
    display: grid;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

/* ============================================
   5. ANIMATIONS
   ============================================ */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

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

@keyframes wave {
    0% {
        transform: translateX(-100%) translateY(0) rotate(0deg);
    }
    50% {
        transform: translateX(-50%) translateY(-20px) rotate(180deg);
    }
    100% {
        transform: translateX(0) translateY(0) rotate(360deg);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    33% {
        transform: translateY(-20px) rotate(5deg);
    }
    66% {
        transform: translateY(10px) rotate(-5deg);
    }
}

@keyframes glow-pulse {
    0%, 100% {
        box-shadow: var(--glow-sm);
    }
    50% {
        box-shadow: var(--glow-lg);
    }
}

/* Animation Classes */
.animate-fadeIn {
    animation: fadeIn var(--transition-base) ease-out;
}

.animate-slideInLeft {
    animation: slideInLeft var(--transition-base) ease-out;
}

.animate-slideInRight {
    animation: slideInRight var(--transition-base) ease-out;
}

.animate-scaleIn {
    animation: scaleIn var(--transition-base) ease-out;
}

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

.animate-float {
    animation: float 6s ease-in-out infinite;
}

.animate-glow {
    animation: glow-pulse 2s ease-in-out infinite;
}

/* ============================================
   6. UTILITY CLASSES
   ============================================ */

/* Display */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-inline-block { display: inline-block !important; }
.d-flex { display: flex !important; }
.d-grid { display: grid !important; }

/* Spacing */
.m-0 { margin: 0 !important; }
.m-1 { margin: var(--spacing-xs) !important; }
.m-2 { margin: var(--spacing-sm) !important; }
.m-3 { margin: var(--spacing-md) !important; }
.m-4 { margin: var(--spacing-lg) !important; }
.m-5 { margin: var(--spacing-xl) !important; }

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: var(--spacing-xs) !important; }
.mt-2 { margin-top: var(--spacing-sm) !important; }
.mt-3 { margin-top: var(--spacing-md) !important; }
.mt-4 { margin-top: var(--spacing-lg) !important; }
.mt-5 { margin-top: var(--spacing-xl) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: var(--spacing-xs) !important; }
.mb-2 { margin-bottom: var(--spacing-sm) !important; }
.mb-3 { margin-bottom: var(--spacing-md) !important; }
.mb-4 { margin-bottom: var(--spacing-lg) !important; }
.mb-5 { margin-bottom: var(--spacing-xl) !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: var(--spacing-xs) !important; }
.p-2 { padding: var(--spacing-sm) !important; }
.p-3 { padding: var(--spacing-md) !important; }
.p-4 { padding: var(--spacing-lg) !important; }
.p-5 { padding: var(--spacing-xl) !important; }

/* Text Alignment */
.text-left { text-align: left !important; }
.text-center { text-align: center !important; }
.text-right { text-align: right !important; }

/* Text Colors */
.text-primary { color: var(--primary-color) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-success { color: var(--success) !important; }
.text-warning { color: var(--warning) !important; }
.text-danger { color: var(--error) !important; }
.text-info { color: var(--info) !important; }

/* Background Colors */
.bg-primary { background-color: var(--primary-color) !important; }
.bg-primary-gradient { background: var(--primary-gradient) !important; }
.bg-white { background-color: #FFFFFF !important; }
.bg-light { background-color: var(--bg-tertiary) !important; }
.bg-dark { background-color: var(--neutral-800) !important; }

/* Borders */
.border { border: 1px solid var(--border-default) !important; }
.border-primary { border-color: var(--primary-color) !important; }
.border-light { border-color: var(--border-light) !important; }
.border-0 { border: 0 !important; }

/* Border Radius */
.rounded { border-radius: var(--radius-md) !important; }
.rounded-sm { border-radius: var(--radius-sm) !important; }
.rounded-lg { border-radius: var(--radius-lg) !important; }
.rounded-xl { border-radius: var(--radius-xl) !important; }
.rounded-full { border-radius: var(--radius-full) !important; }

/* Shadows */
.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }
.shadow-xl { box-shadow: var(--shadow-xl) !important; }
.shadow-purple { box-shadow: var(--shadow-purple) !important; }
.shadow-none { box-shadow: none !important; }

/* ============================================
   7. RESPONSIVE BREAKPOINTS
   ============================================ */

/* Mobile First Approach */
@media (min-width: 576px) {
    /* Small devices (landscape phones) */
}

@media (min-width: 768px) {
    /* Medium devices (tablets) */
    .container {
        max-width: 750px;
    }
}

@media (min-width: 992px) {
    /* Large devices (desktops) */
    .container {
        max-width: 970px;
    }
}

@media (min-width: 1200px) {
    /* Extra large devices (large desktops) */
    .container {
        max-width: 1140px;
    }
}

@media (min-width: 1400px) {
    /* Extra extra large devices */
    .container {
        max-width: 1320px;
    }
}

/* Print Styles */
@media print {
    body {
        background-color: white;
        color: black;
    }

    .no-print {
        display: none !important;
    }
}