/**
 * Custom CSS for Io URL Shortener
 * Enterprise-grade styling and animations
 */

/* Custom Properties */
:root {
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    --transition-all: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-colors: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out;
}

/* Base Styles */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #374151;
    background-color: #f9fafb;
}

/* Custom Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% {
        transform: translate3d(0, 0, 0);
    }
    40%, 43% {
        transform: translate3d(0, -30px, 0);
    }
    70% {
        transform: translate3d(0, -15px, 0);
    }
    90% {
        transform: translate3d(0, -4px, 0);
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.6s ease-out;
}

.slide-in {
    animation: slideIn 0.6s ease-out;
}

.pulse {
    animation: pulse 2s infinite;
}

.bounce {
    animation: bounce 1s;
}

/* Custom Utilities */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-600), var(--primary-800));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
}

.bg-gradient-hero {
    background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
}

.shadow-glow {
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.border-gradient {
    border: 2px solid transparent;
    background: linear-gradient(white, white) padding-box,
                linear-gradient(135deg, var(--primary-500), var(--primary-700)) border-box;
}

/* Enhanced Button Styles */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    transition: var(--transition-all);
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-700), var(--primary-800));
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: white;
    color: var(--primary-700);
    border: 1px solid var(--primary-200);
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    transition: var(--transition-all);
}

.btn-secondary:hover {
    background: var(--primary-50);
    border-color: var(--primary-300);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Enhanced Input Styles */
.input-enhanced {
    transition: var(--transition-all);
    position: relative;
}

.input-enhanced:focus {
    transform: translateY(-1px);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1), var(--shadow-md);
}

.input-enhanced.border-green-500 {
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.1);
}

.input-enhanced.border-red-500 {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Card Hover Effects */
.card-hover {
    transition: var(--transition-all);
}

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

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Modal Animations */
.modal-backdrop {
    backdrop-filter: blur(4px);
    transition: opacity 0.3s ease-out;
}

.modal-content {
    transition: transform 0.3s ease-out, opacity 0.3s ease-out;
}

.modal-enter {
    opacity: 0;
}

.modal-enter .modal-content {
    transform: scale(0.95) translateY(-20px);
    opacity: 0;
}

.modal-enter-active {
    opacity: 1;
}

.modal-enter-active .modal-content {
    transform: scale(1) translateY(0);
    opacity: 1;
}

/* Toast Animations */
.toast-enter {
    transform: translateY(100%);
    opacity: 0;
}

.toast-enter-active {
    transform: translateY(0);
    opacity: 1;
    transition: transform 0.3s ease-out, opacity 0.3s ease-out;
}

.toast-exit {
    transform: translateY(0);
    opacity: 1;
}

.toast-exit-active {
    transform: translateY(100%);
    opacity: 0;
    transition: transform 0.3s ease-in, opacity 0.3s ease-in;
}

/* Form Validation States */
.form-group {
    position: relative;
}

.form-error {
    animation: shake 0.4s ease-in-out;
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-2px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(2px);
    }
}

/* Scroll Indicators */
.scroll-indicator {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-500), var(--primary-700));
    transition: width 0.1s ease-out;
    z-index: 1000;
}

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

::-webkit-scrollbar-track {
    background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --text-primary: #f8fafc;
        --text-secondary: #cbd5e1;
    }
}

/* Focus Styles for Accessibility */
.focus-visible:focus {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

/* Reduced Motion Support */
@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;
    }
}

/* High Contrast Support */
@media (prefers-contrast: high) {
    .btn-primary {
        border: 2px solid;
    }
    
    .input-enhanced {
        border-width: 2px;
    }
}

/* Print Styles */
@media print {
    .no-print {
        display: none !important;
    }
    
    * {
        color-adjust: exact !important;
    }
}

/* Mobile Optimizations */
@media (max-width: 640px) {
    .card-hover:hover {
        transform: none;
    }
    
    .btn-primary:hover,
    .btn-secondary:hover {
        transform: none;
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    .card-hover:hover {
        transform: none;
    }
    
    .btn-primary:hover,
    .btn-secondary:hover {
        transform: none;
    }
}

/* Performance Optimizations */
.will-change-transform {
    will-change: transform;
}

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

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