/* ===== HeroSwipe Desktop Styles ===== */
/* Mobile styles moved to mobile_ui/ folder */

/* ===== APP LAYOUT ===== */
.app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-width: 100vw;
    width: 100%;
    height: 100%;
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    font-family: var(--font-family-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    position: relative;
    transform: translateZ(0); /* Force GPU acceleration */
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.app::before {
    content: '';
    position: fixed;
    top: -20px;
    left: -20px;
    width: calc(100% + 40px);
    height: calc(100% + 40px);
    background: var(--gradient-background);
    opacity: 0.1;
    z-index: -1;
    pointer-events: none;
    transform: translateZ(0);
}

/* ===== HEADER ===== */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-xl);
    height: var(--header-height);
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    z-index: var(--z-header);
    box-shadow: var(--shadow-sm);
    transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-subtle);
    opacity: 0.3;
    z-index: -1;
    transform: translateZ(0);
}

.header-left {
    display: flex;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    font-size: var(--font-size-xl);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.header h1 {
    font-size: var(--font-size-xl);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    position: relative;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.1));
}

.header h1::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
    border-radius: var(--radius-full);
}

.header:hover h1::after {
    transform: scaleX(1);
}

.header-right {
    display: flex;
    align-items: center;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: var(--transition-all);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.header-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-all);
    z-index: 1;
    transform: translateZ(0);
}

.header-btn:hover::before {
    opacity: 0.1;
}

.header-btn:hover {
    background: var(--color-bg-tertiary);
    border-color: var(--color-border-accent);
    color: var(--color-text-primary);
    transform: translateZ(0) translateY(-1px);
    box-shadow: var(--shadow-md);
}

.header-btn:active {
    transform: translateZ(0) translateY(0);
    box-shadow: var(--shadow-sm);
}

.header-btn .btn-icon {
    font-size: var(--font-size-base);
    z-index: 2;
    position: relative;
}

.header-btn .btn-label {
    z-index: 2;
    position: relative;
}

.theme-btn {
    background: var(--color-bg-tertiary);
    border-color: var(--color-border-accent);
}

.theme-btn:hover {
    background: var(--color-bg-quaternary);
    transform: translateY(-2px) scale(1.05);
}

.theme-btn .theme-icon {
    transition: var(--transition-bounce);
}

.theme-btn:hover .theme-icon {
    transform: rotate(180deg);
}

.preferences-btn {
    background: var(--color-info-light);
    border-color: var(--color-info);
    color: var(--color-info);
}

.preferences-btn:hover {
    background: var(--color-info);
    color: var(--color-text-inverse);
}

.preferences-btn.active {
    background: var(--color-info);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-md);
}

.settings-btn {
    background: var(--color-warning-light);
    border-color: var(--color-warning);
    color: var(--color-warning);
}

.settings-btn:hover {
    background: var(--color-warning);
    color: var(--color-text-inverse);
}

.settings-btn:hover .btn-icon {
    transform: rotate(45deg);
}

.profile-btn {
    background: var(--color-success-light);
    border-color: var(--color-success);
    color: var(--color-success);
}

.profile-btn:hover {
    background: var(--color-success);
    color: var(--color-text-inverse);
}

.profile-btn.active {
    background: var(--color-success);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-md);
}

.header-btn:active {
    transform: translateY(1px);
}

/* ===== GAME CONTAINER ===== */
.game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: var(--footer-height);
    width: 100%;
    height: calc(100vh - var(--header-height) - var(--footer-height));
    overflow: hidden;
    transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.cards-stack {
    position: relative;
    width: 400px;
    height: 600px;
    margin: var(--spacing-xl) auto;
    perspective: 1000px;
    transform: translateZ(0);
}

.cards-stack.hidden {
    display: none !important;
    height: 0 !important;
    margin: 0 !important;
    visibility: hidden !important;
}

.cards-stack::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    bottom: 10px;
    background: var(--gradient-subtle);
    border-radius: var(--radius-xl);
    opacity: 0.3;
    z-index: -1;
    filter: blur(20px);
    transform: translateZ(0);
}

.card {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-bg-elevated);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-elevated);
    cursor: pointer;
    transition: var(--transition-all);
    transform-origin: center center;
    overflow: hidden;
    border: 1px solid var(--color-border-accent);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform: translateZ(0); /* Force GPU acceleration */
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-overlay);
    opacity: 0;
    transition: var(--transition-all);
    z-index: 1;
}

.cards-stack:empty::before {
    content: 'No more cards';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: var(--font-size-lg);
    color: var(--color-text-tertiary);
    text-align: center;
    z-index: 10;
}

.card:nth-child(1) {
    z-index: 5;
    transform: translateZ(0);
}

.card:nth-child(2) {
    z-index: 4;
    transform: translateZ(0) scale(0.95) translateY(10px);
}

.card:nth-child(3) {
    z-index: 3;
    transform: translateZ(0) scale(0.9) translateY(20px);
}

.card:nth-child(4) {
    z-index: 2;
    transform: translateZ(0) scale(0.85) translateY(30px);
}

.card:nth-child(5) {
    z-index: 1;
    transform: translateZ(0) scale(0.8) translateY(40px);
}

.card:active {
    cursor: grabbing;
}

.card.dragging {
    z-index: 10;
    transition: none;
    transform: translateZ(0);
}

.cards-stack:has(.card.dragging) .card {
    transition: transform 0.3s ease;
}

.card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-xl);
    transition: var(--transition-all);
    transform: translateZ(0);
}

.card img::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        transparent 0%,
        transparent 40%,
        rgba(0, 0, 0, 0.1) 60%,
        rgba(0, 0, 0, 0.8) 100%
    );
    border-radius: var(--radius-xl);
}

.swipe-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-inverse);
    opacity: 0;
    transition: var(--transition-fast);
    pointer-events: none;
    z-index: 2;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-lg);
    border: 2px solid transparent;
    transform: translate(-50%, -50%) translateZ(0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.swipe-indicator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: inherit;
    border-radius: inherit;
    opacity: 0.9;
    z-index: -1;
    transform: translateZ(0);
}

.swipe-indicator.like {
    background: rgba(34, 197, 94, 0.9);
    border-color: #22c55e;
    box-shadow: 0 0 20px rgba(34, 197, 94, 0.3);
}

.swipe-indicator.dislike {
    background: rgba(239, 68, 68, 0.9);
    border-color: #ef4444;
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.3);
}

.swipe-indicator.info {
    background: rgba(59, 130, 246, 0.9);
    border-color: #3b82f6;
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.swipe-indicator.show {
    opacity: 1;
    animation: swipeIndicatorPulse 0.5s ease-in-out;
    transform: translate(-50%, -50%) translateZ(0) scale(1);
}

.swipe-indicator.info.show {
    animation: swipeIndicatorPulse 0.5s ease-in-out, 
               swipeIndicatorRotate 0.5s ease-in-out;
}

@keyframes swipeIndicatorPulse {
    0% { transform: translate(-50%, -50%) translateZ(0) scale(0.8); }
    50% { transform: translate(-50%, -50%) translateZ(0) scale(1.2); }
    100% { transform: translate(-50%, -50%) translateZ(0) scale(1); }
}

@keyframes swipeIndicatorRotate {
    0% { transform: translate(-50%, -50%) translateZ(0) rotate(0deg); }
    50% { transform: translate(-50%, -50%) translateZ(0) rotate(180deg); }
    100% { transform: translate(-50%, -50%) translateZ(0) rotate(360deg); }
}

.card:hover {
    transform: translateZ(0) translateY(-8px) scale(1.01);
    box-shadow: var(--shadow-2xl);
    border-color: var(--color-border-primary);
}

.card:hover::before {
    opacity: 0.05;
}

.card.dragging:hover {
    transform: translateZ(0);
    box-shadow: var(--shadow-elevated);
}

.card {
    animation: cardFadeIn 0.6s ease-out;
}

.card:not(.dragging) {
    transform-origin: center center;
}

.card:not(.dragging):hover {
    transform: translateZ(0) translateY(-8px) scale(1.01);
}

@keyframes cardFadeIn {
    from {
        opacity: 0;
        transform: translateY(50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.card:nth-child(1) {
    animation-delay: 0s;
}

.card:nth-child(2) {
    animation-delay: 0.1s;
}

.card:nth-child(3) {
    animation-delay: 0.2s;
}

.card.loading {
    pointer-events: none;
}

.card.loading .card-image {
    filter: blur(2px);
}

.card.loading .card-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent
    );
    animation: shimmer 2s infinite;
}

/* ===== START GAME SECTION ===== */
.start-game-section {
    display: flex;
    justify-content: center;
    align-items: center;
    flex: 1;
    width: 100%;
    padding: var(--spacing-2xl);
    text-align: center;
    position: relative;
    transform: translateZ(0);
}

.start-game-section.hidden {
    display: none;
}

/* When start game section is visible, ensure perfect centering */
.game-container:has(.start-game-section:not(.hidden)) {
    justify-content: center;
    align-items: center;
}

.game-container:has(.start-game-section:not(.hidden)) .cards-stack {
    display: none;
}

.game-container:has(.start-game-section:not(.hidden)) .loading-overlay {
    display: none;
}

.start-game-content {
    max-width: 600px;
    background: var(--color-bg-elevated);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-elevated);
    border: 1px solid var(--color-border-accent);
    position: relative;
    overflow: hidden;
    transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.start-game-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-subtle);
    opacity: 0.1;
    z-index: 0;
    animation: startGameFloat 4s ease-in-out infinite;
    transform: translateZ(0);
}

@keyframes startGameFloat {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.start-game-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    animation: startGamePulse 2s ease-in-out infinite;
}

@keyframes startGamePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.start-game-title {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.start-game-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
}

.start-game-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-lg);
    color: var(--color-text-inverse);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-all);
    position: relative;
    overflow: hidden;
    margin: var(--spacing-lg) 0;
    transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.start-game-btn:hover {
    transform: translateZ(0) translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-lg);
    filter: brightness(1.1);
}

.start-game-btn:active {
    transform: translateZ(0) translateY(0) scale(1);
    box-shadow: var(--shadow-md);
}

.start-game-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-secondary);
    opacity: 0;
    transition: var(--transition-all);
}

.start-game-btn:hover::before {
    opacity: 1;
}

.start-btn-icon {
    font-size: var(--font-size-xl);
    transition: var(--transition-bounce);
}

.start-game-btn:hover .start-btn-icon {
    transform: scale(1.2) rotate(10deg);
}

.start-btn-text {
    z-index: 2;
    position: relative;
}

.start-game-tips {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.tip {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    transition: var(--transition-all);
}

.tip:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    transform: translateY(-2px);
}

.tip-icon {
    font-size: var(--font-size-base);
}

[data-theme="dark"] .start-game-content {
    background: var(--color-bg-secondary);
    border-color: var(--color-border-accent);
}

[data-theme="dark"] .start-game-title {
    color: var(--color-text-primary);
}

[data-theme="dark"] .start-game-description {
    color: var(--color-text-secondary);
}

[data-theme="dark"] .tip {
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
}

[data-theme="dark"] .tip:hover {
    background: var(--color-bg-quaternary);
    color: var(--color-text-primary);
}

/* Mobile responsive start game section moved to mobile_ui/mobile-styles.css */

/* ===== PREMIUM GAME CONTROLS ===== */
.game-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    max-width: 350px;
    margin: var(--spacing-sm) auto 0;
    background: var(--gradient-glass);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border-accent);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-lg);
    background: var(--color-bg-elevated);
    color: var(--color-text-primary);
    font-size: var(--font-size-xs);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-all);
    position: relative;
    overflow: hidden;
    min-width: 60px;
    min-height: 60px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border-accent);
}

.action-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-all);
    z-index: 1;
}

.action-btn:hover::before {
    opacity: 0.1;
}

.action-btn:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: var(--shadow-elevated);
}

.action-btn:active {
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.action-btn .btn-icon {
    font-size: var(--font-size-lg);
    transition: var(--transition-bounce);
    z-index: 2;
    position: relative;
}

.action-btn .btn-text {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    z-index: 2;
    position: relative;
}

/* Enhanced Action Button Styles */
.dislike-btn {
    background: var(--color-error-light);
    border-color: var(--color-error);
    color: var(--color-error);
}

.dislike-btn::before {
    background: var(--gradient-error);
}

.dislike-btn:hover {
    background: var(--color-error);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-elevated);
}

.dislike-btn:hover .btn-icon {
    transform: scale(1.3) rotate(-15deg);
    animation: rejectPulse 0.6s ease-in-out;
}

@keyframes rejectPulse {
    0% { transform: scale(1.3) rotate(-15deg); }
    25% { transform: scale(1.4) rotate(-20deg); }
    50% { transform: scale(1.3) rotate(-15deg); }
    75% { transform: scale(1.4) rotate(-10deg); }
    100% { transform: scale(1.3) rotate(-15deg); }
}

.info-btn {
    background: var(--color-info-light);
    border-color: var(--color-info);
    color: var(--color-info);
}

.info-btn::before {
    background: linear-gradient(135deg, #3b82f6 0%, #60a5fa 100%);
}

.info-btn:hover {
    background: var(--color-info);
    color: var(--color-text-inverse);
    box-shadow: 0 25px 50px -12px rgba(59, 130, 246, 0.4);
}

.info-btn:hover .btn-icon {
    transform: scale(1.3);
    animation: infoPulse 0.6s ease-in-out;
}

@keyframes infoPulse {
    0% { transform: scale(1.3) rotate(0deg); }
    50% { transform: scale(1.4) rotate(180deg); }
    100% { transform: scale(1.3) rotate(360deg); }
}

.like-btn {
    background: var(--color-success-light);
    border-color: var(--color-success);
    color: var(--color-success);
}

.like-btn::before {
    background: var(--gradient-success);
}

.like-btn:hover {
    background: var(--color-success);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-elevated);
}

.like-btn:hover .btn-icon {
    transform: scale(1.3);
    animation: heartbeat 0.6s ease-in-out;
}

@keyframes heartbeat {
    0% { transform: scale(1.3); }
    25% { transform: scale(1.5); }
    50% { transform: scale(1.3); }
    75% { transform: scale(1.5); }
    100% { transform: scale(1.3); }
}

.action-btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.dislike-btn:focus {
    outline-color: var(--color-error);
}

.info-btn:focus {
    outline-color: var(--color-info);
}

.like-btn:focus {
    outline-color: var(--color-success);
}

.game-controls {
    animation: controlsSlideUp 0.6s ease-out;
}

@keyframes controlsSlideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.action-btn {
    animation: buttonFadeIn 0.6s ease-out;
}

.action-btn:nth-child(1) {
    animation-delay: 0.1s;
}

.action-btn:nth-child(2) {
    animation-delay: 0.2s;
}

.action-btn:nth-child(3) {
    animation-delay: 0.3s;
}

@keyframes buttonFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.8);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.action-btn:active {
    transform: translateY(0) scale(0.95);
}

/* ===== LOADING OVERLAY ===== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-bg-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: var(--z-modal);
    opacity: 1;
    transition: opacity 0.3s ease-out;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease-out;
}

.loading-container {
    text-align: center;
    color: var(--color-text-primary);
    max-width: 300px;
    background: var(--color-bg-elevated);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-elevated);
    border: 1px solid var(--color-border-accent);
    transform: translateZ(0);
}

.loading-spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-border);
    border-top: 2px solid var(--color-primary);
    border-radius: 50%;
    margin: 0 auto var(--spacing-md);
    animation: spin 1s linear infinite;
    transform: translateZ(0);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-container p {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text-primary);
    margin: 0 0 var(--spacing-lg) 0;
    text-align: center;
}

.loading-progress {
    width: 200px;
    height: 4px;
    background: var(--color-border);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin: 0 auto;
    transform: translateZ(0);
}

.loading-progress-bar {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    width: 0%;
    transition: width 0.3s ease-out;
    transform: translateZ(0);
}

/* ===== ACCESSIBILITY & UTILITY CLASSES ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--color-primary);
    color: var(--color-text-inverse);
    padding: 8px;
    text-decoration: none;
    z-index: 1000;
    border-radius: var(--radius-sm);
}

.skip-link:focus {
    top: 6px;
}

/* ===== UTILITY CLASSES ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.d-flex { display: flex; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-none { display: none; }

.align-center { align-items: center; }
.align-start { align-items: flex-start; }
.align-end { align-items: flex-end; }

.justify-center { justify-content: center; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }

.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

.m-xs { margin: var(--spacing-xs); }
.m-sm { margin: var(--spacing-sm); }
.m-md { margin: var(--spacing-md); }
.m-lg { margin: var(--spacing-lg); }
.m-xl { margin: var(--spacing-xl); }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }

.select-none { user-select: none; }
.select-text { user-select: text; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.position-relative { position: relative; }
.position-absolute { position: absolute; }
.position-fixed { position: fixed; }

.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.flex-1 { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }

.transition-all { transition: all var(--transition-all); }
.transition-fast { transition: all var(--transition-fast); }
.transition-slow { transition: all var(--transition-slow); }

/* ===== MODAL STYLES ===== */
.modal {
    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;
    justify-content: center;
    align-items: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease-out;
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--color-bg-elevated);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    border: 1px solid var(--color-border-accent);
    max-width: 90vw;
    max-height: 90vh;
    overflow: hidden;
    transform: scale(0.9) translateY(50px);
    transition: transform 0.3s ease-out;
}

.modal.show .modal-content {
    transform: scale(1) translateY(-50px);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
    margin: 0;
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: var(--transition-all);
}

.modal-close:hover {
    background: var(--color-bg-quaternary);
    color: var(--color-text-primary);
    transform: scale(1.1);
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-all);
    text-decoration: none;
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
}

.btn:hover {
    background: var(--color-bg-tertiary);
    border-color: var(--color-border-accent);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn:active {
    transform: translateY(0);
    box-shadow: none;
}

.btn-primary {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-text-inverse);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

.btn-secondary {
    background: var(--color-secondary);
    border-color: var(--color-secondary);
    color: var(--color-text-inverse);
}

.btn-secondary:hover {
    background: var(--color-secondary-hover);
    border-color: var(--color-secondary-hover);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.btn:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* ===== PROFILE MODAL ===== */
.profile-modal .modal-content {
    max-width: 720px;
    width: 95%;
    max-height: 95vh;
    overflow-y: auto;
    background: linear-gradient(135deg, var(--color-bg-elevated) 0%, var(--color-bg-secondary) 100%);
    border: 2px solid var(--color-primary);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.profile-modal .modal-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-text-inverse);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: none;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.profile-modal .modal-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-inverse);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.profile-modal .modal-close {
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-text-inverse);
    border: 2px solid rgba(255, 255, 255, 0.3);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: var(--font-size-lg);
    font-weight: 700;
    transition: var(--transition-fast);
}

.profile-modal .modal-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.profile-body {
    padding: var(--spacing-xl);
    background: var(--color-bg-elevated);
}

.profile-section {
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-lg);
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.profile-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
}

.profile-section:last-child {
    margin-bottom: 0;
}

.profile-section h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-sm);
}

/* Profile Picture Styles */
.profile-picture-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.profile-picture {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
    border: 3px solid var(--color-border-accent);
    background: var(--color-bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.profile-picture img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-picture-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-text-tertiary);
    text-align: center;
    height: 100%;
}

.profile-picture-placeholder span {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.profile-picture-placeholder p {
    font-size: var(--font-size-sm);
    margin: 0;
}

.profile-picture-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.profile-picture-buttons .btn {
    font-size: var(--font-size-xs);
    padding: var(--spacing-sm) var(--spacing-md);
}

/* Form Styles */
.form-group {
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg-elevated);
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    font-weight: 500;
    transition: var(--transition-fast);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background: var(--color-bg-primary);
    box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.15), 0 4px 12px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
    border-color: var(--color-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.form-group small {
    display: block;
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    font-style: italic;
}

.char-counter {
    text-align: right;
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.stat-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.stat-group label {
    font-weight: 500;
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
}

.stat-input {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.stat-input input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: var(--radius-full);
    background: var(--color-bg-tertiary);
    outline: none;
    -webkit-appearance: none;
}

.stat-input input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    border: 2px solid var(--color-bg-elevated);
    box-shadow: var(--shadow-sm);
}

.stat-input input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    border: 2px solid var(--color-bg-elevated);
    box-shadow: var(--shadow-sm);
}

.stat-value {
    min-width: 30px;
    text-align: center;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-bg-tertiary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
}

/* Profile Modal Actions */
.profile-modal .modal-actions {
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

.profile-modal .modal-actions .btn {
    padding: var(--spacing-md) var(--spacing-xl);
    font-weight: 600;
    font-size: var(--font-size-base);
    border-radius: var(--radius-lg);
    min-width: 120px;
    transition: var(--transition-fast);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.profile-modal .modal-actions .btn-secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    border: 2px solid var(--color-border);
}

.profile-modal .modal-actions .btn-secondary:hover {
    background: var(--color-bg-quaternary);
    color: var(--color-text-primary);
    border-color: var(--color-text-tertiary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.profile-modal .modal-actions .btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-text-inverse);
    border: 2px solid transparent;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.profile-modal .modal-actions .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.4);
}

.profile-modal .modal-actions .btn-primary:active {
    transform: translateY(0);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .profile-modal .modal-content {
        max-width: 95%;
        margin: var(--spacing-md);
    }
    
    .profile-body {
        padding: var(--spacing-md);
    }
    
    .profile-section {
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-lg);
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .profile-picture-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .profile-picture-buttons .btn {
        width: 200px;
    }
    
    .profile-modal .modal-actions {
        padding: var(--spacing-md);
        flex-direction: column;
    }
    
    .profile-modal .modal-actions .btn {
        width: 100%;
        min-width: auto;
    }
}

/* ===== ACCESSIBILITY ===== */
.header-btn:focus,
.action-btn:focus,
.btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ===== FINAL TOUCHES ===== */
.app > * {
    position: relative;
    z-index: 1;
}

/* Ensure proper stacking context */
.header {
    z-index: 10;
}

.game-container {
    z-index: 1;
}

/* ===== HOVER STATES FOR DESKTOP ===== */
@media (hover: hover) and (pointer: fine) {
    .card:hover {
        transform: translateZ(0) translateY(-10px) scale(1.02);
    }
    
    .action-btn:hover {
        transform: translateY(-4px) scale(1.05);
    }
    
    .header-btn:hover {
        transform: translateY(-2px);
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    *,
    *::before,
    *::after {
        background: transparent !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    
    .header,
    .game-controls,
    .footer {
        display: none !important;
    }
    
    .game-container {
        padding: 0 !important;
    }
    
    .card {
        position: static !important;
        box-shadow: none !important;
        border: 1px solid black !important;
    }
}

/* ===== HIGH CONTRAST MODE ===== */
@media (prefers-contrast: high) {
    :root {
        --color-bg-primary: #000000;
        --color-bg-secondary: #ffffff;
        --color-text-primary: #ffffff;
        --color-text-secondary: #000000;
        --color-border: #ffffff;
        --color-border-accent: #ffffff;
        --color-primary: #0000ff;
        --color-secondary: #ff0000;
        --color-success: #00ff00;
        --color-error: #ff0000;
        --color-warning: #ffff00;
        --color-info: #00ffff;
    }
    
    .card,
    .modal-content,
    .preferences-content {
        border: 2px solid var(--color-border) !important;
    }
    
    .header-btn:hover,
    .action-btn:hover,
    .btn:hover {
        background: var(--color-primary) !important;
        color: var(--color-text-inverse) !important;
    }
}

/* ===== 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;
    }
    
    .card:hover,
    .action-btn:hover,
    .header-btn:hover {
        transform: none !important;
    }
}

/* ===== PERFORMANCE OPTIMIZATIONS ===== */
.card,
.action-btn,
.header-btn {
    will-change: transform;
    contain: layout style paint;
}

.loading-spinner,
.card {
    transform: translateZ(0);
}

/* Mobile styles moved to mobile_ui/ folder */