/* ===========================
   LAY FILMS DESIGN SYSTEM
   Modern UI Foundation
   =========================== */

:root {
    /* ===== COLOR SYSTEM ===== */
    
    /* Primary Green */
    --primary-50: #e6f9f0;
    --primary-100: #b3efd4;
    --primary-200: #80e5b8;
    --primary-300: #4ddb9c;
    --primary-400: #33d58d;
    --primary-500: #19d27c;
    --primary-600: #16be70;
    --primary-700: #12a361;
    --primary-800: #0e8851;
    --primary-900: #0a6b3f;
    
    /* Neutrals */
    --neutral-0: #ffffff;
    --neutral-50: #fafafa;
    --neutral-100: #f5f5f5;
    --neutral-200: #e5e5e5;
    --neutral-300: #d4d4d4;
    --neutral-400: #a3a3a3;
    --neutral-500: #737373;
    --neutral-600: #525252;
    --neutral-700: #404040;
    --neutral-800: #262626;
    --neutral-900: #171717;
    --neutral-950: #0a0a0a;
    --neutral-1000: #000000;
    
    /* Semantic Colors */
    --success: #19d27c;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    /* ===== GRADIENTS ===== */
    
    --gradient-primary: linear-gradient(135deg, #19d27c 0%, #12a361 100%);
    --gradient-primary-hover: linear-gradient(135deg, #33d58d 0%, #19d27c 100%);
    --gradient-hero-dark: linear-gradient(135deg, #000000 0%, #0a0a0a 50%, #171717 100%);
    --gradient-hero-light: linear-gradient(135deg, #ffffff 0%, #fafafa 50%, #f5f5f5 100%);
    --gradient-glass-dark: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    --gradient-glass-light: linear-gradient(135deg, rgba(0,0,0,0.05) 0%, rgba(0,0,0,0.02) 100%);
    --gradient-text: linear-gradient(135deg, #ffffff 0%, #19d27c 100%);
    --gradient-overlay: linear-gradient(to bottom, rgba(0,0,0,0) 0%, rgba(0,0,0,0.8) 100%);
    
    /* ===== TYPOGRAPHY SCALE ===== */
    
    /* Responsive font sizes using clamp() */
    --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);      /* 12-14px */
    --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);        /* 14-16px */
    --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);        /* 16-18px */
    --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);       /* 18-20px */
    --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);        /* 20-24px */
    --text-2xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);             /* 24-32px */
    --text-3xl: clamp(2rem, 1.7rem + 1.5vw, 3rem);             /* 32-48px */
    --text-4xl: clamp(2.5rem, 2rem + 2.5vw, 4rem);             /* 40-64px */
    --text-5xl: clamp(3rem, 2.5rem + 3vw, 5rem);               /* 48-80px */
    --text-6xl: clamp(4rem, 3rem + 5vw, 6rem);                 /* 64-96px */
    
    /* Font weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;
    
    /* Line heights */
    --leading-none: 1;
    --leading-tight: 1.1;
    --leading-snug: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* Letter spacing */
    --tracking-tighter: -0.05em;
    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.025em;
    --tracking-wider: 0.05em;
    --tracking-widest: 0.1em;
    
    /* ===== SPACING SCALE ===== */
    
    --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-11: 2.75rem;     /* 44px */
    --space-12: 3rem;        /* 48px */
    --space-14: 3.5rem;      /* 56px */
    --space-16: 4rem;        /* 64px */
    --space-20: 5rem;        /* 80px */
    --space-24: 6rem;        /* 96px */
    --space-28: 7rem;        /* 112px */
    --space-32: 8rem;        /* 128px */
    
    /* ===== BORDER RADIUS ===== */
    
    --radius-none: 0;
    --radius-sm: 0.25rem;    /* 4px */
    --radius-base: 0.5rem;   /* 8px */
    --radius-md: 0.75rem;    /* 12px */
    --radius-lg: 1rem;       /* 16px */
    --radius-xl: 1.25rem;    /* 20px */
    --radius-2xl: 1.5rem;    /* 24px */
    --radius-3xl: 2rem;      /* 32px */
    --radius-full: 9999px;
    
    /* ===== SHADOWS ===== */
    
    --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);
    
    /* Glow shadows */
    --shadow-glow-sm: 0 0 10px rgba(25, 210, 124, 0.3);
    --shadow-glow-md: 0 0 20px rgba(25, 210, 124, 0.4);
    --shadow-glow-lg: 0 0 30px rgba(25, 210, 124, 0.5);
    --shadow-glow-xl: 0 0 40px rgba(25, 210, 124, 0.6);
    
    /* ===== BLUR ===== */
    
    --blur-none: 0;
    --blur-sm: 4px;
    --blur-base: 8px;
    --blur-md: 12px;
    --blur-lg: 16px;
    --blur-xl: 24px;
    --blur-2xl: 40px;
    --blur-3xl: 64px;
    
    /* ===== ANIMATION TIMINGS ===== */
    
    --duration-instant: 0ms;
    --duration-fast: 150ms;
    --duration-base: 250ms;
    --duration-slow: 350ms;
    --duration-slower: 500ms;
    --duration-slowest: 750ms;
    
    /* Easing functions */
    --ease-linear: linear;
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --ease-elastic: cubic-bezier(0.68, -0.6, 0.32, 1.6);
    --ease-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);
    
    /* ===== Z-INDEX SCALE ===== */
    
    --z-0: 0;
    --z-10: 10;
    --z-20: 20;
    --z-30: 30;
    --z-40: 40;
    --z-50: 50;
    --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-max: 9999;
}

/* ===== UTILITY CLASSES ===== */

/* Glassmorphism */
.glass-effect {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-effect-light {
    background: rgba(0, 0, 0, 0.05);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

/* Text gradients */
.text-gradient {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* Smooth transitions */
.transition-smooth {
    transition: all var(--duration-base) var(--ease-smooth);
}

.transition-fast {
    transition: all var(--duration-fast) var(--ease-out);
}

.transition-slow {
    transition: all var(--duration-slow) var(--ease-in-out);
}

/* Hover lift effect */
.hover-lift {
    transition: transform var(--duration-base) var(--ease-out),
                box-shadow var(--duration-base) var(--ease-out);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* Glow effect */
.glow-on-hover {
    transition: box-shadow var(--duration-base) var(--ease-out);
}

.glow-on-hover:hover {
    box-shadow: var(--shadow-glow-lg);
}

/* Animation classes for scroll reveals */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--duration-slower) var(--ease-out),
                transform var(--duration-slower) var(--ease-out);
}

.animate-on-scroll.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animation delays */
.stagger-1 { transition-delay: 100ms; }
.stagger-2 { transition-delay: 200ms; }
.stagger-3 { transition-delay: 300ms; }
.stagger-4 { transition-delay: 400ms; }
.stagger-5 { transition-delay: 500ms; }

/* ===== ANIMATIONS ===== */

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

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

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

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

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

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

@keyframes gradientShift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* ===== ACCESSIBILITY ===== */

/* Respect user's motion preferences */
@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;
    }
}

/* Focus visible styles */
:focus-visible {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Skip to content link */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-500);
    color: white;
    padding: var(--space-2) var(--space-4);
    text-decoration: none;
    border-radius: var(--radius-base);
    z-index: var(--z-max);
}

.skip-to-content:focus {
    top: var(--space-2);
}