/* Fonts loaded via <link> in HTML with preconnect for better performance */

/* Base & Typography */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    -webkit-tap-highlight-color: transparent;
    transition: background-color 0.3s ease, color 0.3s ease;
    text-rendering: optimizeLegibility;
}

/* Dimmer placeholders - much less prominent */
::placeholder {
    opacity: 0.35;
    color: #6b7280;
}

::-webkit-input-placeholder {
    opacity: 0.35;
    color: #6b7280;
}

::-moz-placeholder {
    opacity: 0.35;
    color: #6b7280;
}

.dark ::placeholder,
.dark ::-webkit-input-placeholder,
.dark ::-moz-placeholder {
    opacity: 0.3;
    color: #9ca3af;
}

.font-mono {
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border-width: 0;
}

.sr-only:focus {
    position: absolute;
    width: auto;
    height: auto;
    padding: 0.5rem 1rem;
    margin: 0;
    overflow: visible;
    clip-path: none;
    white-space: normal;
}

/* Focus visible styles for keyboard navigation */
:focus-visible {
    outline: 2px solid #4f46e5;
    outline-offset: 2px;
}

.dark :focus-visible {
    outline-color: #818cf8;
}

/* Gradients & Utilities */
.gradient-bg {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
}

.gradient-bg:hover {
    background: linear-gradient(135deg, #4338ca 0%, #6d28d9 100%);
}

.gradient-text {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Improved touch targets */
input, select, button, textarea {
    touch-action: manipulation;
    min-height: 44px;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid #4f46e5;
    outline-offset: 2px;
    border-color: #4f46e5;
}

/* Animations with 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;
    }
    
    html {
        scroll-behavior: auto;
    }
}

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

@keyframes slideUp {
    from { 
        opacity: 0; 
        transform: translateY(20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

@keyframes pulse-subtle {
    0%, 100% { 
        opacity: 1; 
    }
    50% { 
        opacity: 0.8; 
    }
}

.animate-fade-in {
    animation: fadeIn 0.4s ease-out forwards;
}

.animate-slide-up {
    animation: slideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Toast Notifications */
.toast-enter-active,
.toast-leave-active {
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast-enter-from,
.toast-leave-to {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
}

/* Form Elements */
.input-error {
    border-color: #ef4444 !important;
    background-color: #fef2f2 !important;
    animation: shake 0.4s cubic-bezier(.36,.07,.19,.97) both;
}

.dark .input-error {
    background-color: #451a1a !important;
}

@keyframes shake {
    10%, 90% { transform: translate3d(-1px, 0, 0); }
    20%, 80% { transform: translate3d(2px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
    40%, 60% { transform: translate3d(4px, 0, 0); }
}

/* Tooltips with improved accessibility */
.has-tooltip {
    position: relative;
    cursor: help;
}

.has-tooltip:hover .tooltip-content,
.has-tooltip:focus-visible .tooltip-content {
    visibility: visible;
    opacity: 1;
    bottom: 120%;
    transform: translateX(-50%) translateY(0);
}

.tooltip-content {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(5px);
    background-color: #1f2937;
    color: white;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    text-align: center;
    width: max-content;
    max-width: 220px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 50;
    pointer-events: none;
    line-height: 1.4;
}

.tooltip-content::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: #1f2937 transparent transparent transparent;
}

/* Dark mode tooltip */
.dark .tooltip-content {
    background-color: #374151;
}

.dark .tooltip-content::after {
    border-color: #374151 transparent transparent transparent;
}

/* Mobile-specific UX improvements */
@media (hover: none) and (pointer: coarse) {
    /* Touch device optimizations */
    .btn-touch {
        min-height: 48px;
        min-width: 48px;
    }

    /* Disable hover effects on touch devices */
    .has-tooltip:hover .tooltip-content {
        visibility: hidden;
        opacity: 0;
    }

    .has-tooltip:active .tooltip-content {
        visibility: visible;
        opacity: 1;
    }
}

/* Safe area support for notched devices */
@supports (padding-top: env(safe-area-inset-top)) {
    .safe-area-top {
        padding-top: env(safe-area-inset-top);
    }

    .safe-area-bottom {
        padding-bottom: env(safe-area-inset-bottom);
    }

    .safe-area-x {
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }
}

/* Mobile-first responsive text */
.text-responsive {
    font-size: clamp(0.875rem, 2.5vw, 1rem);
}

/* Horizontal scroll container */
.scroll-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.scroll-container::-webkit-scrollbar {
    display: none;
}

/* Mobile-optimized spacing */
@media (max-width: 640px) {
    .mobile-compact {
        padding: 0.5rem;
    }

    .mobile-gap {
        gap: 0.5rem;
    }
}

/* Modal */
.modal-enter-active,
.modal-leave-active {
    transition: opacity 0.3s ease;
}

.modal-enter-from,
.modal-leave-to {
    opacity: 0;
}

.modal-enter-active .modal-content,
.modal-leave-active .modal-content {
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-enter-from .modal-content,
.modal-leave-to .modal-content {
    transform: scale(0.95) translateY(10px);
}

/* Plotly Overrides */
.js-plotly-plot .plotly .modebar {
    top: auto !important;
    bottom: 10px !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    right: auto !important;
    background-color: rgba(255, 255, 255, 0.9) !important;
    padding: 4px 8px !important;
    border-radius: 9999px !important;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1) !important;
}

.dark .js-plotly-plot .plotly .modebar {
    background-color: rgba(30, 30, 30, 0.9) !important;
}

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

::-webkit-scrollbar-track {
    background: transparent;
}

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

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

.dark ::-webkit-scrollbar-thumb {
    background: #475569;
}

.dark ::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

.scrollbar-hide::-webkit-scrollbar {
    display: none;
}

.scrollbar-hide {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

/* Loading States */
.loading-pulse {
    animation: pulse-subtle 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .gradient-bg {
        background: #4f46e5;
    }
    
    .input-error {
        border-width: 3px;
    }
    
    :focus-visible {
        outline-width: 3px;
    }
}