/* ============================================
   KEYZOR - Design System Ultra-Premium
   ============================================ */

:root {
    /* Palette de couleurs Keyzor */
    --kz-primary: #6366f1;
    --kz-primary-dark: #4f46e5;
    --kz-primary-light: #818cf8;
    --kz-secondary: #ec4899;
    --kz-accent: #14b8a6;
    --kz-dark: #0f172a;
    --kz-dark-light: #1e293b;
    --kz-gray: #64748b;
    --kz-light: #f8fafc;
    --kz-white: #ffffff;
    
    /* Gradients */
    --kz-gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --kz-gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --kz-gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --kz-gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    
    /* Shadows */
    --kz-shadow-sm: 0 2px 8px rgba(99, 102, 241, 0.08);
    --kz-shadow-md: 0 4px 20px rgba(99, 102, 241, 0.12);
    --kz-shadow-lg: 0 8px 40px rgba(99, 102, 241, 0.18);
    --kz-shadow-xl: 0 20px 60px rgba(99, 102, 241, 0.25);
    
    /* Spacing */
    --kz-space-xs: 0.5rem;
    --kz-space-sm: 1rem;
    --kz-space-md: 1.5rem;
    --kz-space-lg: 2rem;
    --kz-space-xl: 3rem;
    
    /* Border Radius */
    --kz-radius-sm: 8px;
    --kz-radius-md: 12px;
    --kz-radius-lg: 16px;
    --kz-radius-xl: 24px;
    
    /* Transitions */
    --kz-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --kz-transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--kz-dark);
    background: var(--kz-white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

/* ============================================
   Navigation Ultra-Premium
   ============================================ */

.kz-navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: 1rem 0;
    transition: var(--kz-transition);
}

.kz-navbar.scrolled {
    box-shadow: var(--kz-shadow-md);
    padding: 0.75rem 0;
}

.kz-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

.kz-nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.kz-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    transition: var(--kz-transition);
}

.kz-logo:hover {
    transform: translateY(-2px);
}

.kz-logo-icon {
    width: 45px;
    height: 45px;
    background: var(--kz-gradient-primary);
    border-radius: var(--kz-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    box-shadow: var(--kz-shadow-md);
    position: relative;
    overflow: hidden;
}

.kz-logo-icon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.2), transparent);
    transform: rotate(45deg);
    animation: shine 3s infinite;
}

@keyframes shine {
    0% { transform: translateX(-100%) rotate(45deg); }
    100% { transform: translateX(100%) rotate(45deg); }
}

.kz-logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--kz-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.kz-nav-menu {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    list-style: none;
}

.kz-nav-link {
    text-decoration: none;
    color: var(--kz-gray);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: var(--kz-transition);
}

.kz-nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--kz-gradient-primary);
    transition: var(--kz-transition);
}

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

.kz-nav-link:hover::after {
    width: 100%;
}

.kz-nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.kz-user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem 1rem;
    background: var(--kz-light);
    border-radius: var(--kz-radius-lg);
}

.kz-balance {
    font-weight: 600;
    color: var(--kz-primary);
}

.kz-username {
    color: var(--kz-gray);
    font-size: 0.9rem;
}

.kz-btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--kz-radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: var(--kz-transition);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.kz-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: var(--kz-transition);
}

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

.kz-btn-primary {
    background: var(--kz-gradient-primary);
    color: white;
    box-shadow: var(--kz-shadow-md);
}

.kz-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--kz-shadow-lg);
    color: white;
}

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

.kz-btn-outline:hover {
    background: var(--kz-primary);
    color: white;
    transform: translateY(-2px);
}

.kz-btn-secondary {
    background: var(--kz-light);
    color: var(--kz-gray);
}

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

.kz-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--kz-dark);
    cursor: pointer;
}

/* Main Content Spacing */
.kz-main-content {
    padding-top: 100px;
    min-height: 70vh;
}

/* Cards & Containers */
.kz-card {
    background: white;
    border-radius: var(--kz-radius-lg);
    padding: 2rem;
    box-shadow: var(--kz-shadow-sm);
    transition: var(--kz-transition);
}

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

/* Section Headers */
.kz-section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.kz-section-title {
    font-size: 2.5rem;
    color: var(--kz-dark);
    margin-bottom: 1rem;
}

.kz-section-subtitle {
    color: var(--kz-primary);
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.kz-section-description {
    font-size: 1.1rem;
    color: var(--kz-gray);
    max-width: 700px;
    margin: 0 auto;
}

/* Forms */
.kz-form-group {
    margin-bottom: 1.5rem;
}

.kz-form-label {
    display: block;
    font-weight: 600;
    color: var(--kz-dark);
    margin-bottom: 0.5rem;
}

.kz-form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: var(--kz-radius-sm);
    font-size: 1rem;
    transition: var(--kz-transition);
    background: white;
}

.kz-form-input:focus {
    outline: none;
    border-color: var(--kz-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Grid System */
.kz-grid {
    display: grid;
    gap: 2rem;
}

.kz-grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.kz-grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.kz-grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Footer */
.kz-footer {
    background: var(--kz-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 4rem 0 2rem;
}

.kz-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.kz-footer-brand {
    color: white;
}

.kz-footer-brand .kz-logo {
    margin-bottom: 1rem;
}

.kz-footer-description {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.kz-social-links {
    display: flex;
    gap: 1rem;
}

.kz-social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--kz-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: var(--kz-transition);
}

.kz-social-link:hover {
    background: var(--kz-primary);
    transform: translateY(-3px);
    color: white;
}

.kz-footer-column h4 {
    color: white;
    font-size: 1.1rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.kz-footer-links {
    list-style: none;
}

.kz-footer-links li {
    margin-bottom: 0.75rem;
}

.kz-footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--kz-transition);
    font-size: 0.95rem;
}

.kz-footer-links a:hover {
    color: white;
    padding-left: 0.5rem;
}

.kz-payment-icons {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.kz-payment-icon {
    height: 30px;
    opacity: 0.7;
    transition: var(--kz-transition);
}

.kz-payment-icon:hover {
    opacity: 1;
    transform: scale(1.1);
}

.kz-footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.kz-copyright {
    font-size: 0.9rem;
}

.kz-footer-love {
    font-size: 0.9rem;
}

/* Alerts & Messages */
.kz-alert {
    padding: 1rem 1.5rem;
    border-radius: var(--kz-radius-md);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.kz-alert-success {
    background: #d1fae5;
    color: #065f46;
    border-left: 4px solid #10b981;
}

.kz-alert-danger {
    background: #fee2e2;
    color: #991b1b;
    border-left: 4px solid #ef4444;
}

.kz-alert-info {
    background: #dbeafe;
    color: #1e40af;
    border-left: 4px solid #3b82f6;
}

.kz-alert-warning {
    background: #fef3c7;
    color: #92400e;
    border-left: 4px solid #f59e0b;
}

/* Badges */
.kz-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.35rem 0.75rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
}

.kz-badge-primary {
    background: var(--kz-gradient-primary);
    color: white;
}

.kz-badge-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.kz-badge-warning {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
}

.kz-badge-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

/* Utilities */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }

.py-1 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-2 { padding-top: 1rem; padding-bottom: 1rem; }
.py-3 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-4 { padding-top: 2rem; padding-bottom: 2rem; }
.py-5 { padding-top: 3rem; padding-bottom: 3rem; }

/* Responsive */
@media (max-width: 1024px) {
    .kz-footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .kz-container {
        padding: 0 1.5rem;
    }
    
    .kz-nav-menu {
        display: none;
    }
    
    .kz-menu-toggle {
        display: block;
    }
    
    .kz-section-title {
        font-size: 2rem;
    }
    
    .kz-footer-grid {
        grid-template-columns: 1fr;
    }
    
    .kz-footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

/* Animations */
::selection {
    background: var(--kz-primary);
    color: white;
}

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--kz-light);
}

::-webkit-scrollbar-thumb {
    background: var(--kz-primary);
    border-radius: 5px;
}

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

/* Loading State */
.kz-loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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