/**
 * Animated Section Transitions
 * Sleeper-inspired smooth animations for page sections and navigation
 */

/* ~~~~~~~~~~~~~~~~~~ */
/* PAGE SECTION TRANSITIONS */
/* ~~~~~~~~~~~~~~~~~~ */

/* Base transition for all sections */
.page-section {
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Hidden state */
.page-section.hidden {
    opacity: 0;
    transform: translateY(20px);
    visibility: hidden;
    pointer-events: none;
}

/* Visible state */
.page-section:not(.hidden) {
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
    pointer-events: auto;
    animation: sectionFadeIn 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Section fade-in animation */
@keyframes sectionFadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Fade out animation */
.page-section.fade-out {
    animation: sectionFadeOut 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

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

/* ~~~~~~~~~~~~~~~~~~ */
/* CARD ANIMATIONS */
/* ~~~~~~~~~~~~~~~~~~ */

/* Stagger animation for grid items - optimized for faster feel */
.stagger-item {
    opacity: 0;
    transform: translateY(20px);
    animation: staggerIn 0.25s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.stagger-item:nth-child(1) { animation-delay: 0.02s; }
.stagger-item:nth-child(2) { animation-delay: 0.04s; }
.stagger-item:nth-child(3) { animation-delay: 0.06s; }
.stagger-item:nth-child(4) { animation-delay: 0.08s; }
.stagger-item:nth-child(5) { animation-delay: 0.1s; }
.stagger-item:nth-child(6) { animation-delay: 0.12s; }
.stagger-item:nth-child(7) { animation-delay: 0.14s; }
.stagger-item:nth-child(8) { animation-delay: 0.16s; }
.stagger-item:nth-child(9) { animation-delay: 0.18s; }
.stagger-item:nth-child(10) { animation-delay: 0.2s; }

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

/* ~~~~~~~~~~~~~~~~~~ */
/* MODAL TRANSITIONS */
/* ~~~~~~~~~~~~~~~~~~ */

/* Modal overlay fade */
.modal-overlay {
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay:not(.hidden) {
    opacity: 1;
    visibility: visible;
}

.modal-overlay.hidden {
    opacity: 0;
    visibility: hidden;
}

/* Modal content slide and scale */
.modal {
    animation: modalSlideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(-30px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-overlay.hidden .modal {
    animation: modalSlideOut 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes modalSlideOut {
    from {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
    to {
        opacity: 0;
        transform: scale(0.9) translateY(-30px);
    }
}

/* ~~~~~~~~~~~~~~~~~~ */
/* TAB TRANSITIONS */
/* ~~~~~~~~~~~~~~~~~~ */

/* Tab content transitions */
.tab-content {
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab-content.hidden {
    opacity: 0;
    transform: translateX(-20px);
    display: none;
}

.tab-content:not(.hidden) {
    opacity: 1;
    transform: translateX(0);
    animation: tabSlideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Tab button active indicator */
.tab-button {
    position: relative;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab-button::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--primary-green);
    transform: translateX(-50%);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab-button.active::after {
    width: 100%;
}

/* ~~~~~~~~~~~~~~~~~~ */
/* LIST ITEM ANIMATIONS */
/* ~~~~~~~~~~~~~~~~~~ */

/* Smooth list item transitions */
.animated-list-item {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.animated-list-item:hover {
    transform: translateX(4px);
    background: var(--surface-light);
}

/* List item enter animation */
@keyframes listItemEnter {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.list-item-enter {
    animation: listItemEnter 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ~~~~~~~~~~~~~~~~~~ */
/* LOADING STATES */
/* ~~~~~~~~~~~~~~~~~~ */

/* Skeleton loading animation */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--surface-light) 0%,
        var(--surface-border) 50%,
        var(--surface-light) 100%
    );
    background-size: 200% 100%;
    animation: skeletonPulse 1.5s ease-in-out infinite;
}

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

/* Spinner animation */
.spinner {
    animation: spin 1s linear infinite;
}

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

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

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

/* ~~~~~~~~~~~~~~~~~~ */
/* NOTIFICATION ANIMATIONS */
/* ~~~~~~~~~~~~~~~~~~ */

/* Toast slide in from right */
@keyframes toastSlideIn {
    from {
        transform: translateX(120%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast-enter {
    animation: toastSlideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Toast slide out to right */
@keyframes toastSlideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(120%);
        opacity: 0;
    }
}

.toast-exit {
    animation: toastSlideOut 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ~~~~~~~~~~~~~~~~~~ */
/* HOVER & FOCUS TRANSITIONS */
/* ~~~~~~~~~~~~~~~~~~ */

/* Smooth button transitions */
.btn,
button {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn:hover,
button:hover {
    transform: translateY(-2px);
}

.btn:active,
button:active {
    transform: translateY(0);
    transition-duration: 0.1s;
}

/* Card hover lift */
.card,
.form-card,
.dashboard-league-card {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover,
.form-card:hover,
.dashboard-league-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

/* ~~~~~~~~~~~~~~~~~~ */
/* NAVIGATION TRANSITIONS */
/* ~~~~~~~~~~~~~~~~~~ */

/* Sidebar navigation smooth transitions */
.sidebar-nav a {
    position: relative;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-nav a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: -1;
}

.sidebar-nav a:hover::before,
.sidebar-nav a.active::before {
    width: 100%;
}

/* Bottom nav slide up */
@keyframes bottomNavSlideUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

.bottom-nav {
    animation: bottomNavSlideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ~~~~~~~~~~~~~~~~~~ */
/* DROPDOWN ANIMATIONS */
/* ~~~~~~~~~~~~~~~~~~ */

/* Dropdown menu fade and slide */
.dropdown-menu {
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
}

.dropdown-menu.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

/* ~~~~~~~~~~~~~~~~~~ */
/* SCROLL ANIMATIONS */
/* ~~~~~~~~~~~~~~~~~~ */

/* Reveal on scroll */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-on-scroll.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ~~~~~~~~~~~~~~~~~~ */
/* BADGE ANIMATIONS */
/* ~~~~~~~~~~~~~~~~~~ */

/* Badge pop in */
@keyframes badgePopIn {
    0% {
        opacity: 0;
        transform: scale(0);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.badge-enter {
    animation: badgePopIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ~~~~~~~~~~~~~~~~~~ */
/* ACCESSIBILITY - REDUCED 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;
    }

    .page-section,
    .modal,
    .tab-content,
    .toast,
    .card,
    .btn {
        animation: none !important;
        transition: none !important;
    }
}

/* ~~~~~~~~~~~~~~~~~~ */
/* MOBILE OPTIMIZATIONS */
/* ~~~~~~~~~~~~~~~~~~ */

@media (max-width: 768px) {
    /* Faster animations on mobile for better performance */
    .page-section,
    .modal,
    .tab-content {
        transition-duration: 0.25s;
    }

    /* Reduce animation complexity on mobile */
    .stagger-item {
        animation: none;
        opacity: 1;
        transform: none;
    }

    /* Simpler hover effects on touch devices */
    @media (hover: none) {
        .card:hover,
        .btn:hover {
            transform: none;
        }
    }
}