/* ==================================================
   MEDVAULT ADVANCED ANIMATION SYSTEM
   ================================================== */

/* Root Variables for Animations */
:root {
    --anim-duration-fast: 200ms;
    --anim-duration-normal: 350ms;
    --anim-duration-slow: 500ms;
    --anim-easing: cubic-bezier(0.2, 0.8, 0.2, 1);
    --anim-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Base Page Transition */
body {
    opacity: 1;
    transition: opacity var(--anim-duration-normal) var(--anim-easing);
}

body.page-transitioning {
    opacity: 0;
}

/* Staggered Entrance Classes */
.anim-fade-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--anim-duration-slow) var(--anim-easing), 
                transform var(--anim-duration-slow) var(--anim-easing);
    will-change: opacity, transform;
}

.anim-fade-in {
    opacity: 0;
    transition: opacity var(--anim-duration-slow) var(--anim-easing);
}

.anim-scale-in {
    opacity: 0;
    transform: scale(0.96);
    transition: opacity var(--anim-duration-slow) var(--anim-easing),
                transform var(--anim-duration-slow) var(--anim-easing);
}

.anim-visible {
    opacity: 1 !important;
    transform: none !important;
}

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

/* Neo-Brutalist Buttons */
.anim-btn {
    position: relative;
    transition: transform var(--anim-duration-fast) var(--anim-easing),
                box-shadow var(--anim-duration-fast) var(--anim-easing) !important;
    box-shadow: 4px 4px 0px rgba(0,0,0,0.8) !important;
    transform: translate(0, 0);
    border: 1px solid #000 !important;
}

.anim-btn:hover:not(:disabled) {
    transform: translate(-2px, -2px) !important;
    box-shadow: 6px 6px 0px rgba(0,0,0,0.8) !important;
}

.anim-btn:active:not(:disabled) {
    transform: translate(3px, 3px) !important;
    box-shadow: 1px 1px 0px rgba(0,0,0,0.8) !important;
}

/* Button Loading State */
.anim-btn.is-loading {
    color: transparent !important;
    pointer-events: none;
    box-shadow: 4px 4px 0px rgba(0,0,0,0.3) !important;
}

.anim-btn.is-loading::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: 20px;
    height: 20px;
    margin-left: -10px;
    margin-top: -10px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: #0f3b5e;
    animation: spin 1s linear infinite;
}

.btn-primary.anim-btn.is-loading::after, .btn-secondary.anim-btn.is-loading::after,
.premium-btn-primary.anim-btn.is-loading::after {
    border-top-color: #fff;
}

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

/* Inputs */
.anim-input {
    transition: border-color var(--anim-duration-fast) var(--anim-easing),
                box-shadow var(--anim-duration-fast) var(--anim-easing),
                transform var(--anim-duration-fast) var(--anim-easing);
}

.anim-input:focus {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(15, 59, 94, 0.1);
}

.input-error {
    animation: shake 0.4s var(--anim-bounce) both;
    border-color: #dc3545 !important;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-5px); }
    40%, 80% { transform: translateX(5px); }
}

/* Cards Hover (Neo-brutalist / Premium) */
.anim-card {
    transition: transform var(--anim-duration-normal) var(--anim-easing),
                box-shadow var(--anim-duration-normal) var(--anim-easing);
}

.anim-card:hover {
    transform: translate(-3px, -3px);
    box-shadow: 0 10px 25px -5px rgba(0,0,0,0.1);
}

/* Skeletons */
.skeleton {
    background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite linear;
    border-radius: 4px;
}

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

/* Timeline */
.timeline-line-anim {
    height: 0;
    transition: height 1.5s var(--anim-easing);
}
.timeline-line-anim.draw {
    height: 100%;
}

/* Success Animation */
.success-anim-container {
    display: inline-block;
    width: 24px;
    height: 24px;
    vertical-align: middle;
}
.success-circle {
    stroke-dasharray: 166;
    stroke-dashoffset: 166;
    stroke-width: 2;
    stroke-miterlimit: 10;
    stroke: #20c997;
    fill: none;
    animation: stroke 0.6s cubic-bezier(0.65, 0, 0.45, 1) forwards;
}

.success-check {
    transform-origin: 50% 50%;
    stroke-dasharray: 48;
    stroke-dashoffset: 48;
    stroke: #20c997;
    stroke-width: 2;
    fill: none;
    animation: stroke 0.3s cubic-bezier(0.65, 0, 0.45, 1) 0.6s forwards;
}

@keyframes stroke {
    100% { stroke-dashoffset: 0; }
}

/* Toast */
.anim-toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #fff;
    border-left: 4px solid var(--primary-color);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    padding: 1rem 1.5rem;
    border-radius: 4px;
    transform: translateX(150%);
    transition: transform var(--anim-bounce) 0.4s;
    z-index: 9999;
}
.anim-toast.show {
    transform: translateX(0);
}

/* Modal */
.anim-modal-overlay {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s;
}
.anim-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}
.anim-modal-content {
    transform: scale(0.92) translateY(10px);
    opacity: 0;
    transition: all 0.3s var(--anim-bounce);
}
.anim-modal-overlay.active .anim-modal-content {
    transform: scale(1) translateY(0);
    opacity: 1;
}

/* Upload Progress */
.upload-progress-bar {
    height: 6px;
    background: #e2e8f0;
    border-radius: 3px;
    overflow: hidden;
    margin-top: 1rem;
    display: none;
}
.upload-progress-fill {
    height: 100%;
    background: var(--primary-color);
    width: 0%;
    transition: width 0.2s linear;
}

/* Reduce Motion */
@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;
    }
}