/* 
 * Enhanced Design Improvements
 * Modern UI enhancements for HyperCreative AI Prompt Library
 */

:root {
    /* Enhanced Color Palette */
    --color-primary: #6366F1;
    --color-primary-dark: #4F46E5;
    --color-primary-light: #818CF8;
    --color-secondary: #8B5CF6;
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-error: #EF4444;
    --color-info: #0EA5E9;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366F1, #8B5CF6);
    --gradient-warm: linear-gradient(135deg, #FF6B6B, #FFA500);
    --gradient-cool: linear-gradient(135deg, #00D4FF, #6366F1);
    --gradient-success: linear-gradient(135deg, #10B981, #14B8A6);
    
    /* Enhanced Neutrals */
    --color-bg: #F9FAFB;
    --color-bg-dark: #111827;
    --color-card: #FFFFFF;
    --color-text-primary: #1F2937;
    --color-text-secondary: #6B7280;
    --color-border: #E5E7EB;
    --color-border-light: #F3F4F6;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-hover: 0 20px 25px rgba(0, 0, 0, 0.15);
    --shadow-inset: inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Source Code Pro', monospace;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Enhancement: Typography ===== */
h1 {
    font-size: clamp(1.875rem, 5vw, 3rem);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
    margin: 0 0 var(--spacing-md) 0 !important;
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.01em;
    margin: 0 0 var(--spacing-md) 0 !important;
}

h3 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    margin: 0 0 var(--spacing-md) 0 !important;
}

p {
    line-height: 1.75;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

/* ===== Enhancement: Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    user-select: none;
    position: relative;
    overflow: hidden;
}

/* Primary Button */
.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
    border: none;
}

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

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

/* Secondary Button */
.btn-secondary {
    background: var(--color-border-light);
    color: var(--color-primary);
    border: 2px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-border);
    border-color: var(--color-primary);
}

/* Outline Button */
.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: white;
}

/* Text Button */
.btn-text {
    background: transparent;
    color: var(--color-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-weight: var(--font-weight-medium);
}

.btn-text:hover {
    color: var(--color-primary-dark);
    background: var(--color-border-light);
    border-radius: var(--radius-md);
}

/* Button Sizes */
.btn-sm {
    padding: 6px 12px;
    font-size: 0.875rem;
}

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

/* ===== Enhancement: Cards ===== */
.card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

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

.card-compact {
    padding: var(--spacing-md);
}

.card-elevated {
    box-shadow: var(--shadow-md);
}

/* ===== Enhancement: Input Fields ===== */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
textarea,
select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    transition: all var(--transition-base);
    background-color: var(--color-card);
    color: var(--color-text-primary);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="search"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    background-color: var(--color-card);
}

input[type="text"]:disabled,
input[type="email"]:disabled,
textarea:disabled {
    background-color: var(--color-border-light);
    color: var(--color-text-secondary);
    cursor: not-allowed;
}

/* ===== Enhancement: Badges ===== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-primary {
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary);
}

.badge-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-warning);
}

.badge-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-error);
}

/* ===== Enhancement: Toast Notifications ===== */
.toast {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 9999;
    animation: slideInUp var(--transition-base);
    max-width: 400px;
}

@keyframes slideInUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.toast-success {
    background: var(--color-success);
    color: white;
}

.toast-error {
    background: var(--color-error);
    color: white;
}

.toast-info {
    background: var(--color-info);
    color: white;
}

/* ===== Enhancement: Dividers ===== */
hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--spacing-lg) 0;
}

/* ===== Enhancement: Links ===== */
a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-base);
    position: relative;
}

a:hover {
    color: var(--color-primary-dark);
}

/* ===== Enhancement: Loading States ===== */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-border) 0%,
        var(--color-border-light) 50%,
        var(--color-border) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
}

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

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

.text-muted {
    color: var(--color-text-secondary);
}

.text-primary {
    color: var(--color-primary);
}

.text-success {
    color: var(--color-success);
}

.text-error {
    color: var(--color-error);
}

.text-sm {
    font-size: 0.875rem;
}

.text-xs {
    font-size: 0.75rem;
}

.text-bold {
    font-weight: var(--font-weight-bold);
}

.text-semibold {
    font-weight: var(--font-weight-semibold);
}

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

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

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

.rounded {
    border-radius: var(--radius-md);
}

.rounded-lg {
    border-radius: var(--radius-lg);
}

.rounded-full {
    border-radius: var(--radius-full);
}

.flex {
    display: flex;
}

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

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

.grid {
    display: grid;
}

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

.hidden {
    display: none !important;
}