/* ==================== UX ENHANCEMENTS - GLASSMORPHISM ==================== */

/* ==================== COLLAPSIBLE SECTIONS ==================== */

.collapsible-section {
    margin-bottom: var(--spacing-lg);
    overflow: hidden;
}

.collapsible-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    user-select: none;
    padding: var(--spacing-md);
    margin: calc(var(--spacing-md) * -1) calc(var(--spacing-md) * -1) var(--spacing-md);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    transition: background var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.collapsible-header:hover {
    background: var(--glass-bg-hover);
}

.collapsible-header:active {
    background: var(--glass-highlight);
}

.collapsible-header h2 {
    margin: 0;
    padding: 0;
    border: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.collapsible-toggle {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: transform var(--transition-normal), background var(--transition-fast);
    font-size: 1rem;
    background: var(--glass-bg);
    color: var(--accent);
}

.collapsible-section.expanded .collapsible-toggle {
    transform: rotate(180deg);
}

.collapsible-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow) ease-in-out;
}

.collapsible-section.expanded .collapsible-content {
    max-height: 5000px;
}

/* ==================== FLOATING ACTION BUTTON (Mobile) ==================== */

.fab {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    z-index: var(--z-dropdown);
    opacity: 0;
    transform: scale(0);
    pointer-events: none;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    border: none;
    box-shadow: 0 4px 20px var(--accent-glow);
    color: var(--bg-dark);
}

.fab.visible {
    opacity: 1;
    transform: scale(1);
    pointer-events: all;
}

.fab:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 24px var(--accent-glow);
}

.fab:active {
    transform: scale(0.95);
}

@media (min-width: 901px) {
    .fab {
        display: none;
    }
}

/* ==================== IMPORT OVERLAY (Mobile) ==================== */

.import-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.import-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.import-sheet {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
    width: 100%;
    max-width: 600px;
    padding: var(--spacing-2xl);
    transform: translateY(100%);
    transition: transform var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
    max-height: 80vh;
    overflow-y: auto;
    border: 1px solid var(--glass-border);
    border-bottom: none;
}

.import-overlay.active .import-sheet {
    transform: translateY(0);
}

.import-sheet-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.import-sheet-header h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    margin: 0;
    color: var(--accent);
}

.close-overlay {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.3rem;
    color: var(--text-light);
    transition: all var(--transition-fast);
}

.close-overlay:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
}

/* ==================== QUICK PRESETS ==================== */

.preset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.preset-btn {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
    font-family: var(--font-body);
    font-size: 0.9rem;
    position: relative;
    overflow: hidden;
    color: var(--text-secondary);
}

.preset-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--accent-glow);
    background: var(--glass-bg-hover);
    border-color: var(--accent);
    color: var(--text-light);
}

.preset-btn .preset-icon {
    font-size: 1.5rem;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.preset-btn .preset-name {
    font-weight: 600;
    display: block;
    margin-bottom: 2px;
    color: var(--text-light);
}

.preset-btn .preset-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: block;
}

/* ==================== TOAST NOTIFICATIONS ==================== */

.toast {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    color: var(--text-light);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    z-index: var(--z-toast);
    transition: transform var(--transition-normal);
    max-width: 90%;
    text-align: center;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

.toast.toast-success {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.9) 0%, rgba(21, 128, 61, 0.9) 100%);
    border-color: var(--success);
}

.toast.toast-error {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.9) 0%, rgba(153, 27, 27, 0.9) 100%);
    border-color: var(--danger);
}

.toast.toast-info {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.9) 0%, rgba(12, 74, 110, 0.9) 100%);
    border-color: var(--secondary);
}

/* ==================== RIPPLE EFFECT ==================== */

.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    transform: scale(0);
    animation: ripple-animation 0.6s ease-out;
    pointer-events: none;
}

@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* ==================== SECTION BADGES ==================== */

.section-badge {
    display: inline-block;
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-weight: 600;
    margin-left: var(--spacing-sm);
    background: var(--glass-bg);
    color: var(--accent-light);
    border: 1px solid var(--glass-border);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.panel.loading {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

.panel.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 28px;
    height: 28px;
    margin: -14px 0 0 -14px;
    border: 2px solid var(--glass-border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spinner 0.8s linear infinite;
}

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

/* ==================== SKELETON LOADING ==================== */

.skeleton {
    background: linear-gradient(
        90deg,
        var(--glass-bg) 0%,
        var(--glass-bg-hover) 50%,
        var(--glass-bg) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

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

/* ==================== GLOW EFFECTS ==================== */

.glow-accent {
    box-shadow: 0 0 20px var(--accent-glow);
}

.glow-success {
    box-shadow: 0 0 20px rgba(34, 197, 94, 0.4);
}

.glow-danger {
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.4);
}

/* ==================== MOBILE-SPECIFIC IMPROVEMENTS ==================== */

@media (max-width: 900px) {
    .collapsible-section.deck-config .collapsible-content {
        max-height: 0;
    }

    .collapsible-section.results .collapsible-content {
        max-height: 5000px;
    }

    .collapsible-section.results.expanded {
        margin-bottom: 80px;
    }

    .quick-import-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: var(--spacing-sm);
        width: 100%;
        padding: var(--spacing-lg);
        margin: var(--spacing-md) 0;
        font-size: 1rem;
        font-weight: 600;
    }

    /* Sticky tab navigation */
    .tab-nav {
        position: sticky;
        top: 0;
        z-index: var(--z-sticky);
        background: rgba(15, 15, 26, 0.95);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        padding: var(--spacing-sm);
        margin: calc(var(--spacing-md) * -1) calc(var(--spacing-md) * -1) var(--spacing-md);
        border-radius: 0;
    }

    /* Reduce overlay blur on mobile */
    .import-overlay {
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
    }

    .import-sheet {
        backdrop-filter: blur(6px);
        -webkit-backdrop-filter: blur(6px);
    }

    .toast {
        backdrop-filter: blur(6px);
        -webkit-backdrop-filter: blur(6px);
    }
}

/* ==================== DESKTOP - KEEP TRADITIONAL LAYOUT ==================== */

@media (min-width: 901px) {
    .collapsible-header {
        cursor: default;
        pointer-events: none;
    }

    .collapsible-toggle {
        display: none;
    }

    .collapsible-content {
        max-height: none !important;
    }

    .quick-import-btn {
        display: none;
    }

    .import-overlay {
        display: none;
    }
}

/* ==================== HOVER GLOW EFFECT ==================== */

@keyframes hoverGlow {
    0%, 100% {
        box-shadow: 0 0 5px var(--accent-glow);
    }
    50% {
        box-shadow: 0 0 20px var(--accent-glow);
    }
}

.hover-glow:hover {
    animation: hoverGlow 1.5s ease-in-out infinite;
}

/* ==================== PULSE ANIMATION ==================== */

@keyframes pulse-glow {
    0%, 100% {
        opacity: 1;
        box-shadow: 0 0 0 0 var(--accent-glow);
    }
    50% {
        opacity: 0.8;
        box-shadow: 0 0 0 10px transparent;
    }
}

.pulse-glow {
    animation: pulse-glow 2s ease-in-out infinite;
}

/* ==================== FADE ANIMATIONS ==================== */

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

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

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

.fade-in {
    animation: fadeIn var(--transition-normal) ease;
}

.fade-in-up {
    animation: fadeInUp var(--transition-normal) ease;
}

.fade-in-down {
    animation: fadeInDown var(--transition-normal) ease;
}

/* ==================== SCALE ANIMATIONS ==================== */

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.scale-in {
    animation: scaleIn var(--transition-normal) ease;
}

/* ==================== SLIDE ANIMATIONS ==================== */

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-right {
    animation: slideInRight var(--transition-normal) ease;
}

.slide-in-left {
    animation: slideInLeft var(--transition-normal) ease;
}

/* ==================== FOCUS RING ==================== */

.focus-ring:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--accent-glow), 0 0 0 1px var(--accent);
}

/* ==================== INTERACTIVE HIGHLIGHT ==================== */

.interactive {
    transition: all var(--transition-fast);
    cursor: pointer;
}

.interactive:hover {
    background: var(--glass-bg-hover);
}

.interactive:active {
    transform: scale(0.98);
}