/* ============ SMOOTH TRANSITIONS & ANIMATIONS ============ */
/* Universal smoothness improvements for theme switching, modals, scrolling */

/* --- CUSTOM EASING FUNCTIONS --- */
:root {
    /* Smooth, natural feeling curves */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
    --ease-in-out-quart: cubic-bezier(0.76, 0, 0.24, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Transition durations */
    --duration-fast: 150ms;
    --duration-normal: 250ms;
    --duration-slow: 350ms;
    --duration-theme: 400ms;
}

/* ============ GLOBAL THEME TRANSITION SYSTEM ============ */
/* Apply smooth color transitions to SPECIFIC elements for theme switching */
/* IMPORTANT: Do NOT use * selector - it breaks form inputs */

html {
    /* NOTE: scroll-behavior: smooth removed - causes laggy feeling during regular scrolling */
    /* Only use smooth scroll for anchor links via JS if needed */
}

/* Theme transitions for containers and structural elements only */
html,
body,
.auth-container,
.main-container,
.sidebar,
.main-content,
.top-nav,
.home-nav,
nav,
header,
footer,
main,
section,
article,
aside,
.card,
.modal,
.modal-content,
.dropdown-menu,
[class*="container"],
[class*="wrapper"],
[class*="panel"],
[class*="section"] {
    transition: background-color var(--duration-theme) var(--ease-out-quart),
                border-color var(--duration-theme) var(--ease-out-quart),
                box-shadow var(--duration-theme) var(--ease-out-quart);
}

/* Text elements for theme color changes */
/* NOTE: Removed span - can interfere with input displays */
h1, h2, h3, h4, h5, h6,
p, label,
.text-primary, .text-secondary, .text-muted {
    transition: color var(--duration-theme) var(--ease-out-quart);
}

/* IMPORTANT: Inputs should NOT have transitions that affect typing */
/* Only allow focus ring transitions */
input,
textarea,
select {
    transition: none !important;
}

input:focus,
textarea:focus,
select:focus {
    transition: box-shadow var(--duration-fast) var(--ease-out-quart) !important;
}

/* ============ SCROLL ENHANCEMENTS ============ */
/* Minimal scroll enhancements - avoid properties that break scroll behavior */

.modal-body,
.email-modal-body,
.carrier-modal-body {
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
}

/* Hide scrollbar but keep functionality (optional - cleaner look) */
.hide-scrollbar {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

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

/* ============ BUTTON & INTERACTIVE TRANSITIONS ============ */

button,
.btn,
[role="button"],
a {
    transition:
        background-color var(--duration-normal) var(--ease-out-quart),
        border-color var(--duration-normal) var(--ease-out-quart),
        color var(--duration-normal) var(--ease-out-quart),
        transform var(--duration-fast) var(--ease-out-expo),
        box-shadow var(--duration-normal) var(--ease-out-quart),
        opacity var(--duration-normal) var(--ease-out-quart);
}

/* Subtle lift effect on hover */
button:hover:not(:disabled),
.btn:hover:not(:disabled),
[role="button"]:hover:not(:disabled) {
    transform: translateY(-1px);
}

button:active:not(:disabled),
.btn:active:not(:disabled),
[role="button"]:active:not(:disabled) {
    transform: translateY(0) scale(0.98);
}

/* ============ MODAL & OVERLAY TRANSITIONS ============ */

/* Improved overlay fade */
.email-modal-overlay,
.custom-ui-overlay,
.modal-overlay,
.carrier-modal-overlay,
.quote-loading-overlay,
.iul-preview-overlay {
    transition:
        opacity var(--duration-slow) var(--ease-out-quart),
        visibility var(--duration-slow);
    /* GPU acceleration for smoother animations */
    will-change: opacity;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

/* Modal content entrance/exit */
.email-modal,
.custom-ui-modal,
.modal-content,
.carrier-modal {
    transition:
        transform var(--duration-slow) var(--ease-spring),
        opacity var(--duration-normal) var(--ease-out-quart);
    will-change: transform, opacity;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

/* Modal entrance states - override existing */
.email-modal-overlay:not(.active) .email-modal,
.custom-ui-overlay:not(.show) .custom-ui-modal {
    transform: scale(0.92) translateY(20px);
    opacity: 0;
}

.email-modal-overlay.active .email-modal,
.custom-ui-overlay.show .custom-ui-modal {
    transform: scale(1) translateY(0);
    opacity: 1;
}

/* ============ CARD & PANEL TRANSITIONS ============ */

.feature-card,
.product-card,
.preview-card,
.quote-card,
.carrier-card {
    transition:
        transform var(--duration-normal) var(--ease-out-expo),
        box-shadow var(--duration-normal) var(--ease-out-quart),
        border-color var(--duration-normal) var(--ease-out-quart),
        background-color var(--duration-theme) var(--ease-out-quart);
    will-change: transform;
}

.feature-card:hover,
.product-card:hover,
.quote-card:hover,
.carrier-card:hover {
    transform: translateY(-4px);
}

/* ============ FORM INPUT TRANSITIONS ============ */
/* DISABLED - transitions on inputs cause typing issues with JS-controlled fields */
/* Inputs explicitly set to transition: none in global section above */

/* ============ NAVIGATION TRANSITIONS ============ */

.home-nav,
.top-nav,
nav {
    transition:
        background-color var(--duration-normal) var(--ease-out-quart),
        backdrop-filter var(--duration-normal) var(--ease-out-quart),
        box-shadow var(--duration-normal) var(--ease-out-quart);
}

/* Nav link underline animation */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: currentColor;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--duration-normal) var(--ease-out-expo);
}

.nav-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* ============ FLOATING & ANIMATED ELEMENTS ============ */

/* Smoother floating animation */
.floating-card {
    animation: smooth-float 6s var(--ease-in-out-quart) infinite;
    will-change: transform;
}

@keyframes smooth-float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-12px);
    }
}

/* ============ LOADING STATES ============ */

/* Skeleton loading shimmer */
.skeleton,
.loading-shimmer {
    background: linear-gradient(
        90deg,
        var(--bg-card) 25%,
        var(--bg-input) 50%,
        var(--bg-card) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s var(--ease-in-out-quart) infinite;
}

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

/* Spinner improvements */
.spinner,
[class*="spinner"] {
    animation: smooth-spin 1s linear infinite;
    will-change: transform;
}

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

/* ============ DROPDOWN & MENU TRANSITIONS ============ */

.dropdown-menu,
.autocomplete-dropdown,
.mobile-menu {
    transition:
        opacity var(--duration-fast) var(--ease-out-quart),
        transform var(--duration-fast) var(--ease-out-expo),
        visibility var(--duration-fast);
    transform-origin: top center;
}

.dropdown-menu:not(.show),
.autocomplete-dropdown:not(.show),
.mobile-menu:not(.show) {
    opacity: 0;
    transform: translateY(-8px) scale(0.95);
    visibility: hidden;
    pointer-events: none;
}

.dropdown-menu.show,
.autocomplete-dropdown.show,
.mobile-menu.show {
    opacity: 1;
    transform: translateY(0) scale(1);
    visibility: visible;
    pointer-events: auto;
}

/* ============ TOGGLE & SWITCH ANIMATIONS ============ */

.theme-toggle-fixed,
.toggle-switch,
.product-btn {
    transition:
        background-color var(--duration-normal) var(--ease-out-quart),
        border-color var(--duration-normal) var(--ease-out-quart),
        color var(--duration-normal) var(--ease-out-quart),
        transform var(--duration-fast) var(--ease-spring),
        box-shadow var(--duration-normal) var(--ease-out-quart);
}

/* Icon rotation on theme toggle */
.theme-toggle-fixed i {
    transition: transform var(--duration-slow) var(--ease-spring);
}

.theme-toggle-fixed:hover i {
    transform: rotate(15deg);
}

/* ============ SUCCESS/ERROR ANIMATIONS ============ */

/* Pop-in animation for success states */
.email-success-icon,
.success-icon,
.modal-icon {
    animation: success-bounce 0.5s var(--ease-spring);
}

@keyframes success-bounce {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.15);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Error shake animation */
.error-shake {
    animation: shake 0.4s var(--ease-out-quart);
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-8px); }
    40% { transform: translateX(8px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

/* ============ TOOLTIP TRANSITIONS ============ */

[data-tooltip],
.tooltip {
    transition:
        opacity var(--duration-fast) var(--ease-out-quart),
        transform var(--duration-fast) var(--ease-out-expo);
}

/* ============ SECTION REVEAL ANIMATIONS ============ */

/* Fade up animation for scroll reveals */
.animate-in {
    animation: fade-up 0.6s var(--ease-out-expo) forwards;
}

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

/* Staggered animations for lists/grids */
.stagger-animate > *:nth-child(1) { animation-delay: 0ms; }
.stagger-animate > *:nth-child(2) { animation-delay: 50ms; }
.stagger-animate > *:nth-child(3) { animation-delay: 100ms; }
.stagger-animate > *:nth-child(4) { animation-delay: 150ms; }
.stagger-animate > *:nth-child(5) { animation-delay: 200ms; }
.stagger-animate > *:nth-child(6) { animation-delay: 250ms; }

/* ============ ACCESSIBILITY: REDUCED MOTION ============ */

@media (prefers-reduced-motion: reduce) {
    /* Disable animations on specific elements only - NOT using * selector */
    .floating-card,
    .animate-in,
    .skeleton,
    .loading-shimmer,
    .spinner,
    [class*="spinner"] {
        animation: none !important;
    }

    /* Keep essential visibility transitions but make them instant */
    .email-modal-overlay,
    .custom-ui-overlay,
    .modal-overlay {
        transition: opacity 0.01ms, visibility 0.01ms;
    }

    .email-modal,
    .custom-ui-modal {
        transition: none;
        transform: none !important;
    }
}

/* ============ GPU ACCELERATION HINTS ============ */

/* Force GPU rendering for smoother animations on these elements */
.email-modal,
.custom-ui-modal,
.modal-content,
.floating-card,
.quote-loading-overlay,
.carrier-modal,
.feature-card:hover,
.product-card:hover {
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
}

/* ============ ANTI-FLICKER FOR THEME TRANSITIONS ============ */

/* Prevent flash of wrong theme on page load */
html {
    background-color: var(--bg-body);
}

/* Ensure smooth theme transition doesn't cause repaints */
html.theme-transitioning {
    pointer-events: none;
}

/* NOTE: Removed html.theme-transitioning * selector - it broke form inputs */