/* WordLearn - Mobile Specific Styles */
/* Optimized for touch interfaces and mobile devices */

/* Side Menu */
.side-menu {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: var(--z-modal);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    pointer-events: none;
}

.side-menu.open {
    transform: translateX(0);
    pointer-events: auto;
}

.side-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-overlay);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: var(--z-modal-backdrop);
    pointer-events: none;
}

.side-menu.open .side-menu-overlay {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.side-menu-content {
    position: relative;
    width: 280px;
    height: 100%;
    max-height: 100vh;
    background-color: var(--bg-surface);
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    z-index: var(--z-modal);
    overflow: hidden;
}

.side-menu-header {
    padding: var(--spacing-lg) var(--spacing-md);
    background: #667eea;
    color: var(--text-white);
    position: relative;
    flex-shrink: 0;
}

.btn-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: transparent;
    border: none;
    color: var(--text-white);
    font-size: var(--font-size-xl);
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    transition: background-color var(--transition-fast);
}

.btn-close:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.btn-close i {
    pointer-events: none;
}

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

.side-menu-content .avatar {
    width: 48px;
    height: 48px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    overflow: hidden;
    flex-shrink: 0;
}

.user-details h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0 0 var(--spacing-xs) 0;
}

.user-details p {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    margin: 0;
}

.side-menu-nav {
    flex: 1;
    min-height: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    padding: 0;
}

.side-menu-footer {
    flex-shrink: 0;
    padding: var(--spacing-md);
    border-top: 1px solid #E0E0E0;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-primary);
    text-decoration: none;
    transition: background-color var(--transition-fast);
    min-height: 48px; /* Touch target */
}

.menu-item:hover {
    background-color: rgba(33, 150, 243, 0.1);
    color: var(--primary-color);
}

.menu-item.active {
    background-color: var(--primary-light);
    color: var(--primary-dark);
    font-weight: 500;
}

.menu-item i {
    width: 24px;
    text-align: center;
    font-size: var(--font-size-lg);
}

.menu-divider {
    height: 1px;
    background-color: #E0E0E0;
    margin: var(--spacing-sm) var(--spacing-md);
}

.side-menu-footer {
    flex-shrink: 0;
    padding: var(--spacing-md);
    border-top: 1px solid #E0E0E0;
}

.language-selector select {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid #E0E0E0;
    border-radius: var(--radius-md);
    background-color: var(--bg-surface);
    font-size: var(--font-size-sm);
}

/* Bottom Navigation – removed (navigation on home page) */
.bottom-nav {
    display: none !important;
}

.bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xs);
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
    min-height: 44px; /* Touch target */
}

.bottom-nav-item:hover {
    color: var(--primary-color);
}

.bottom-nav-item.active {
    color: var(--primary-color);
}

.bottom-nav-item.study-btn {
    background-color: var(--primary-color);
    color: var(--text-white);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.bottom-nav-item.study-btn:hover {
    background-color: var(--primary-dark);
    color: var(--text-white);
}

.bottom-nav-item i {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.bottom-nav-item span {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* Touch-friendly improvements */
button, .btn, a, select, input, textarea, label {
    touch-action: manipulation;
}

button, .btn, a {
    min-height: 44px; /* Apple HIG touch target size */
    min-width: 44px;
}

/* KM – Z1 aukštis, ne 44px touch target (žr. /stiliai/) */
.btn.btn-km1,
.btn.btn-km2,
.btn.btn-km3,
.btn.btn-km4,
.btn.btn-km5,
.btn.btn-km6,
.btn.btn-km7 {
    min-height: unset;
    min-width: unset;
}

/* Natyvūs select/input – veikia planšetėje (kaip importo puslapyje) */
@media (max-width: 1024px) {
    select,
    .form-control,
    .settings-select,
    .menu-select,
    .menu-input {
        min-height: 48px;
        font-size: 16px;
    }

    select,
    .settings-select,
    .menu-select {
        -webkit-appearance: menulist;
        appearance: auto;
    }

    .menu-label-inline input[type="checkbox"] {
        width: 22px;
        height: 22px;
        min-width: 22px;
        min-height: 22px;
    }
}

@media (max-width: 767px) {
    .btn {
        min-height: 48px;
        padding: var(--spacing-md) var(--spacing-lg);
    }

    .btn-sm {
        min-height: 44px;
    }
}

/* Swipe gestures support */
.swipe-container {
    position: relative;
    overflow: hidden;
    touch-action: pan-y;
}

.swipe-item {
    transition: transform var(--transition-normal);
}

.swipe-item.swiping {
    transition: none;
}

/* Card swipe animations */
.card-swipe {
    position: relative;
    overflow: hidden;
}

.card-swipe-content {
    transition: transform var(--transition-normal);
}

.card-swipe-actions {
    position: absolute;
    top: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-md);
}

.card-swipe-actions.left {
    left: 0;
    background: linear-gradient(90deg, var(--success-color), transparent);
}

.card-swipe-actions.right {
    right: 0;
    background: linear-gradient(-90deg, var(--error-color), transparent);
}

/* Pull to refresh */
.pull-refresh {
    position: relative;
    overflow: hidden;
}

.pull-refresh-indicator {
    position: absolute;
    top: -60px;
    left: 0;
    right: 0;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-surface);
    transition: transform var(--transition-normal);
}

.pull-refresh.pulling .pull-refresh-indicator {
    transform: translateY(60px);
}

/* Floating Action Button */
.floating-action-btn {
    position: fixed;
    bottom: 90px; /* Above bottom nav */
    right: var(--spacing-md);
    width: 56px;
    height: 56px;
    background-color: var(--accent-color);
    color: var(--text-white);
    border: none;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: var(--z-fixed);
}

.floating-action-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}

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

/* Study card styles */
.study-card {
    position: relative;
    background-color: var(--bg-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    margin: var(--spacing-md);
    overflow: hidden;
    touch-action: manipulation;
}

.study-card-content {
    padding: var(--spacing-xl);
    text-align: center;
    min-height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.study-card-question {
    font-size: var(--font-size-xxl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.3;
}

.study-card-answer {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
}

.study-card-examples {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    opacity: 0.8;
}

/* Study buttons */
.study-buttons {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
}

.study-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 60px;
}

.study-btn-again {
    background-color: var(--error-color);
    color: var(--text-white);
}

.study-btn-hard {
    background-color: var(--warning-color);
    color: var(--text-white);
}

.study-btn-good {
    background-color: var(--success-color);
    color: var(--text-white);
}

.study-btn-easy {
    background-color: var(--primary-color);
    color: var(--text-white);
}

.study-btn:active {
    transform: scale(0.95);
}

.study-btn-label {
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

.study-btn-time {
    font-size: var(--font-size-xs);
    opacity: 0.8;
}

/* Progress indicators */
.progress-bar {
    width: 100%;
    height: 8px;
    background-color: #E0E0E0;
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

.progress-circle {
    position: relative;
    width: 80px;
    height: 80px;
}

.progress-circle svg {
    transform: rotate(-90deg);
}

.progress-circle-bg {
    fill: none;
    stroke: #E0E0E0;
    stroke-width: 8;
}

.progress-circle-fill {
    fill: none;
    stroke: var(--primary-color);
    stroke-width: 8;
    stroke-linecap: round;
    transition: stroke-dasharray var(--transition-normal);
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-weight: 600;
    font-size: var(--font-size-md);
}

/* Statistics cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.stat-card {
    background-color: var(--bg-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.stat-number {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

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

/* Responsive adjustments */
@media (max-width: 480px) {
    .side-menu-content {
        width: 100vw;
    }
    
    .study-card-content {
        padding: var(--spacing-lg);
        min-height: 250px;
    }
    
    .study-card-question {
        font-size: var(--font-size-xl);
    }
    
    .study-buttons {
        flex-direction: column;
    }
    
    .study-btn {
        flex-direction: row;
        justify-content: center;
        min-height: 48px;
    }
    
    .study-btn-label {
        margin-top: 0;
        margin-left: var(--spacing-sm);
    }
}

/* Dark mode support (future enhancement) */
@media (prefers-color-scheme: dark) {
    /* Dark mode styles would go here */
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn {
        border-width: 3px;
    }
    
    .card {
        border: 2px solid var(--text-primary);
    }
}