/* ============================================
   Uzbek HR Modern Design System 2025
   ============================================ */

/* Color System */
:root {
    /* Primary Colors - Modern Blue Gradient */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-300: #93c5fd;
    --primary-400: #60a5fa;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;

    /* Secondary Colors - Purple Gradient */
    --secondary-50: #f8fafc;
    --secondary-100: #f1f5f9;
    --secondary-200: #e2e8f0;
    --secondary-300: #cbd5e1;
    --secondary-400: #94a3b8;
    --secondary-500: #64748b;
    --secondary-600: #475569;
    --secondary-700: #334155;
    --secondary-800: #1e293b;
    --secondary-900: #0f172a;

    /* Accent Colors */
    --accent-primary: #8b5cf6;
    --accent-secondary: #06b6d4;
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    --accent-error: #ef4444;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-600) 0%, var(--accent-primary) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--secondary-600) 0%, var(--secondary-800) 100%);
    --gradient-success: linear-gradient(135deg, var(--accent-success) 0%, #059669 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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-colored: 0 10px 25px -5px rgba(59, 130, 246, 0.15);

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

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;

    /* Animation */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* ============================================
   Base Styles
   ============================================ */

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--secondary-900);
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Modern Card System
   ============================================ */

.modern-card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--secondary-200);
    transition: all var(--transition-normal);
    overflow: hidden;
}

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

.modern-card-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--secondary-100);
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}

.modern-card-body {
    padding: var(--space-lg);
}

.modern-card-footer {
    padding: var(--space-md) var(--space-lg);
    background: var(--secondary-50);
    border-top: 1px solid var(--secondary-100);
}

/* Glass Card Variant */
.glass-card {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-lg);
}

/* ============================================
   Modern Button System
   ============================================ */

.btn-modern {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.875rem;
    line-height: 1.25;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

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

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

/* Button Variants */
.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-colored);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 30px -5px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
    background: white;
    color: var(--secondary-700);
    border: 2px solid var(--secondary-200);
}

.btn-secondary:hover {
    background: var(--secondary-50);
    border-color: var(--primary-300);
    color: var(--primary-700);
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--secondary-600);
    border: 1px solid transparent;
}

.btn-ghost:hover {
    background: var(--secondary-100);
    color: var(--secondary-900);
}

/* Button Sizes */
.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.75rem;
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
}

/* ============================================
   Modern Form Controls
   ============================================ */

.form-control-modern {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 2px solid var(--secondary-200);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--secondary-900);
    background: white;
    transition: all var(--transition-normal);
}

.form-control-modern:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    transform: translateY(-1px);
}

.form-control-modern::placeholder {
    color: var(--secondary-400);
}

/* Form Groups */
.form-group-modern {
    margin-bottom: var(--space-lg);
}

.form-label-modern {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--secondary-700);
}

/* ============================================
   Modern Navigation
   ============================================ */

.navbar-modern {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--secondary-200);
    position: sticky;
    top: 0;
    z-index: 50;
    transition: all var(--transition-normal);
}

.navbar-modern.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.nav-link-modern {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-weight: 500;
    color: var(--secondary-600);
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
}

.nav-link-modern:hover,
.nav-link-modern.active {
    color: var(--primary-600);
    background: var(--primary-50);
}

.nav-link-modern::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-500);
    transition: all var(--transition-normal);
    transform: translateX(-50%);
}

.nav-link-modern:hover::after,
.nav-link-modern.active::after {
    width: 80%;
}

/* ============================================
   Modern Layout Components
   ============================================ */

.hero-modern {
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
    padding: var(--space-2xl) 0;
}

.hero-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    color: white;
    margin-bottom: var(--space-lg);
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-xl);
    line-height: 1.6;
}

/* ============================================
   Modern Animations
   ============================================ */

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    33% {
        transform: translateY(-20px) rotate(1deg);
    }
    66% {
        transform: translateY(-10px) rotate(-1deg);
    }
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

/* Animation Classes */
.animate-float {
    animation: float 6s ease-in-out infinite;
}

.animate-slide-up {
    animation: slideInUp 0.6s ease-out;
}

.animate-slide-left {
    animation: slideInLeft 0.6s ease-out;
}

.animate-fade-in {
    animation: fadeIn 0.8s ease-out;
}

.animate-pulse-slow {
    animation: pulse 3s ease-in-out infinite;
}

/* ============================================
   Modern Grid System
   ============================================ */

.grid-modern {
    display: grid;
    gap: var(--space-lg);
}

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

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .grid-4,
    .grid-3,
    .grid-2 { grid-template-columns: 1fr; }
}

/* ============================================
   Modern Typography
   ============================================ */

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

.text-balance {
    text-wrap: balance;
}

.heading-1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.heading-2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.01em;
}

.heading-3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    line-height: 1.3;
}

/* ============================================
   Modern Utilities
   ============================================ */

.container-modern {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.section-padding {
    padding: var(--space-2xl) 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }

/* ============================================
   Mobile Optimizations
   ============================================ */

@media (max-width: 768px) {
    :root {
        --space-xl: 1.5rem;
        --space-2xl: 2rem;
    }

    .modern-card-body,
    .modern-card-header {
        padding: var(--space-md);
    }

    .btn-modern {
        width: 100%;
        justify-content: center;
    }

    .hero-modern {
        padding: var(--space-xl) 0;
    }

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

/* ============================================
   Dark Mode Support
   ============================================ */

@media (prefers-color-scheme: dark) {
    :root {
        --secondary-50: #0f172a;
        --secondary-100: #1e293b;
        --secondary-200: #334155;
        --secondary-900: #f1f5f9;
    }

    body {
        background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
        color: var(--secondary-100);
    }

    .modern-card {
        background: var(--secondary-100);
        border-color: var(--secondary-200);
    }

    .navbar-modern {
        background: rgba(15, 23, 42, 0.95);
        border-bottom: 1px solid var(--secondary-200);
    }
}

/* ============================================
   Performance Optimizations
   ============================================ */

.will-change-transform {
    will-change: transform;
}

.will-change-opacity {
    will-change: opacity;
}

.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* ============================================
   Focus States for Accessibility
   ============================================ */

.focus-visible:focus-visible {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
    .modern-card {
        box-shadow: none;
        border: 1px solid #000;
    }

    .btn-modern {
        background: none !important;
        color: #000 !important;
        border: 1px solid #000 !important;
    }
}