/* ===== VARIABLES GLOBALES ===== */
:root {
    /* Couleurs d'état */
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-400) 0%, var(--primary-600) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--secondary-400) 0%, var(--secondary-600) 100%);
    --gradient-warm: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #d97706 100%);
    --gradient-cool: linear-gradient(135deg, #60a5fa 0%, #3b82f6 50%, #2563eb 100%);
    --gradient-surface: linear-gradient(135deg, rgba(255,255,255,0.25) 0%, rgba(255,255,255,0.1) 100%);
    
    /* Espacements */
    --space-xs: 0.25rem;   /* 4px */
    --space-sm: 0.5rem;    /* 8px */
    --space-md: 1rem;      /* 16px */
    --space-lg: 1.5rem;    /* 24px */
    --space-xl: 2rem;      /* 32px */
    --space-2xl: 3rem;     /* 48px */
    --space-3xl: 4rem;     /* 64px */
    
    /* Bordures */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Ombres */
    --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-glow: 0 0 20px rgba(16, 185, 129, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 600ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Typographie */
    --font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --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 */
    
    /* Largeurs */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
    
    /* Z-index */
    --z-tooltip: 100;
    --z-modal: 1000;
    --z-toast: 1100;
}

/* ===== RESET ET BASE ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-gradient);
    background-attachment: fixed;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== UTILITAIRES ===== */
.hidden {
    display: none !important;
}

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

.smooth-transition {
    transition: all var(--transition-normal);
}

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

/* Effet glassmorphism */
.glass-element {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

/* Loading screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    color: white;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-2xl);
    padding: var(--space-3xl);
    box-shadow: var(--shadow-2xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    max-width: 500px;
    margin: 0 auto;
}

.cooking-animation {
    font-size: 4rem;
    margin-bottom: var(--space-xl);
    position: relative;
}

.pan {
    display: inline-block;
    animation: shake 1s infinite ease-in-out;
}

.steam {
    position: absolute;
    top: -1rem;
    left: 50%;
    transform: translateX(-50%);
    animation: float 2s infinite ease-in-out;
    opacity: 0.7;
}

.loading-bar {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin: var(--space-lg) auto 0;
}

.loading-progress {
    height: 100%;
    background: var(--gradient-warm);
    border-radius: var(--radius-full);
    animation: loading-progress 2s infinite ease-in-out;
}

/* Skeleton loading */
.skeleton-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    animation: skeleton-pulse 2s infinite ease-in-out;
}

.skeleton-header,
.skeleton-title,
.skeleton-meta {
    background: rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
}

.skeleton-header {
    height: 20px;
    width: 60%;
}

.skeleton-title {
    height: 24px;
    width: 80%;
}

.skeleton-meta {
    height: 16px;
    width: 90%;
}

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

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--gradient-secondary);
}

/* Selection styling */
::selection {
    background: var(--primary-400);
    color: white;
}