/* Sessions Management Styles */
.sessions-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    padding: 12px 16px;
    background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
    border: 2px solid var(--gray-200);
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sessions-header:hover {
    border-color: var(--primary-300);
    background: linear-gradient(135deg, var(--primary-50) 0%, white 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.15);
}

.sessions-header .form-label {
    margin: 0;
    display: flex;
    align-items: center;
    font-weight: 600;
    color: var(--gray-800);
}

.sessions-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    border-radius: 6px;
    transition: all 0.2s ease;
    color: var(--gray-600);
}

.sessions-toggle:hover {
    background: var(--gray-100);
    color: var(--primary-600);
}

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

.sessions-container {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: white;
    border-left: 2px solid var(--gray-200);
    border-right: 2px solid var(--gray-200);
    border-bottom: 2px solid var(--gray-200);
    border-radius: 0 0 12px 12px;
    margin-top: -2px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.sessions-container.expanded {
    max-height: 450px;
    border-color: var(--primary-300);
}

.sessions-list {
    max-height: 350px;
    overflow-y: auto;
    padding: 16px;
}

.session-item {
    display: flex;
    align-items: center;
    padding: 14px 16px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    margin-bottom: 8px;
    border: 1px solid transparent;
    position: relative;
    min-height: 68px;
}

.session-item:hover {
    background: var(--gray-50);
    border-color: var(--gray-200);
    transform: translateX(2px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.session-item.current-session {
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--primary-25) 100%);
    border-color: var(--primary-200);
}

.session-item.current-session:hover {
    background: linear-gradient(135deg, var(--primary-100) 0%, var(--primary-50) 100%);
    border-color: var(--primary-300);
}

.session-item.active-solving {
    background: linear-gradient(135deg, var(--success-50) 0%, var(--success-25) 100%);
    border-color: var(--success-200);
    animation: pulse-session 2s ease-in-out infinite;
}

@keyframes pulse-session {
    0%, 100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4); }
    50% { box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.1); }
}

.session-item.selected {
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%) !important;
    color: white !important;
    border: 2px solid var(--primary-700) !important;
    box-shadow: 0 4px 16px rgba(14, 165, 233, 0.4) !important;
    transform: scale(1.02) !important;
    position: relative !important;
    animation: selected-pulse 2s ease-in-out infinite alternate !important;
}

.session-item.selected .session-title,
.session-item.selected .session-meta {
    color: white !important;
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2) !important;
}

.session-item.selected .session-icon {
    background: rgba(255, 255, 255, 0.25) !important;
    color: white !important;
    border: 1px solid rgba(255, 255, 255, 0.3) !important;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1) !important;
}

.session-item.selected .status-dot {
    background: white !important;
    box-shadow: 0 0 0 2px var(--primary-600) !important;
}

.session-item.selected:hover {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%) !important;
    box-shadow: 0 6px 20px rgba(14, 165, 233, 0.5) !important;
    transform: scale(1.03) translateX(2px) !important;
}

/* Additional visual enhancement for selected sessions */
.session-item.selected::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: white !important;
    border-radius: 0 2px 2px 0;
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
}

.session-item.selected {
    position: relative;
    animation: selected-pulse 2s ease-in-out infinite alternate;
}

@keyframes selected-pulse {
    0% { box-shadow: 0 4px 16px rgba(14, 165, 233, 0.4); }
    100% { box-shadow: 0 4px 16px rgba(14, 165, 233, 0.6); }
}

.session-icon {
    width: 36px;
    height: 36px;
    background: var(--gray-100);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
    transition: all 0.2s ease;
    color: var(--gray-600);
    flex-shrink: 0;
}

.session-item.current-session .session-icon {
    background: var(--primary-100);
    color: var(--primary-600);
}

.session-info {
    flex: 1;
    min-width: 0;
    padding-right: 8px;
}

.session-title {
    font-weight: 600;
    font-size: 14px;
    color: var(--gray-900);
    margin-bottom: 4px;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    word-break: break-word;
}

.session-meta {
    font-size: 12px;
    color: var(--gray-500);
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    word-break: break-word;
}

.session-status {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
    margin-right: 8px;
    flex-shrink: 0;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--gray-400);
}

.session-status.active .status-dot {
    background: var(--success-500);
    animation: pulse-dot 2s ease-in-out infinite;
}

.session-status.solving .status-dot {
    background: var(--warning-500);
    animation: pulse-dot 1s ease-in-out infinite;
}

.session-status.completed .status-dot {
    background: var(--primary-500);
}

.session-status.interrupted .status-dot {
    background: var(--error-500);
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.3); }
}

/* Session management actions (bottom of sessions panel) */
.sessions-actions {
    display: flex;
    gap: 10px;
    padding: 16px;
    border-top: 1px solid var(--gray-200);
    background: linear-gradient(135deg, var(--gray-25) 0%, var(--gray-50) 100%);
}

/* Session action buttons container */
.session-actions {
    display: flex;
    align-items: center;
    gap: 4px;
    opacity: 0;
    transform: translateX(8px);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    margin-left: 8px;
    flex-shrink: 0;
}

.session-item:hover .session-actions {
    opacity: 1;
    transform: translateX(0);
}

/* Always show actions on selected items */
.session-item.selected .session-actions {
    opacity: 1;
    transform: translateX(0);
}

/* Base styling for action buttons */
.session-download,
.session-delete {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 6px;
    border-radius: 8px;
    background: none;
    border: none;
    cursor: pointer;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    position: relative;
    overflow: hidden;
}

.session-download i,
.session-download svg,
.session-delete i,
.session-delete svg {
    width: 14px !important;
    height: 14px !important;
    stroke-width: 2;
}

.session-download::before,
.session-delete::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: inherit;
    background: currentColor;
    opacity: 0;
    transition: opacity 0.2s ease;
    z-index: -1;
}

/* Download button styling */
.session-download {
    color: var(--primary-500);
}

.session-download:hover {
    color: var(--primary-600);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(14, 165, 233, 0.25);
}

.session-download:hover::before {
    opacity: 0.1;
}

.session-download:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(14, 165, 233, 0.3);
}

/* Delete button styling */
.session-delete {
    color: var(--error-500);
}

.session-delete:hover {
    color: var(--error-600);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.25);
}

.session-delete:hover::before {
    opacity: 0.1;
}

.session-delete:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(239, 68, 68, 0.3);
}

/* Selected session button styling */
.session-item.selected .session-actions {
    opacity: 1;
}

.session-item.selected .session-download,
.session-item.selected .session-delete {
    color: rgba(255, 255, 255, 0.9);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.session-item.selected .session-download:hover,
.session-item.selected .session-delete:hover {
    color: white;
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px) scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.session-item.selected .session-download:hover::before,
.session-item.selected .session-delete:hover::before {
    opacity: 0.15;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .session-download,
    .session-delete {
        width: 28px;
        height: 28px;
        padding: 4px;
    }
    
    .session-actions {
        gap: 2px;
        margin-left: 4px;
    }
}

.session-item.completed-session {
    background: linear-gradient(135deg, var(--success-25) 0%, var(--success-50) 100%);
    border-color: var(--success-200);
}

.session-item.completed-session:hover {
    background: linear-gradient(135deg, var(--success-50) 0%, var(--success-100) 100%);
    border-color: var(--success-300);
}

.session-item.completed-session .session-icon {
    background: var(--success-100);
    color: var(--success-700);
}

.session-item.interrupted-session {
    background: linear-gradient(135deg, var(--warning-25) 0%, var(--warning-50) 100%);
    border-color: var(--warning-200);
}

.session-item.interrupted-session:hover {
    background: linear-gradient(135deg, var(--warning-50) 0%, var(--warning-100) 100%);
    border-color: var(--warning-300);
}

.session-item.interrupted-session .session-icon {
    background: var(--warning-100);
    color: var(--warning-700);
}

/* Add styling and animation for solving sessions */
.session-item.solving-session {
    background: linear-gradient(135deg, var(--primary-25) 0%, var(--primary-50) 100%);
    border-color: var(--primary-200);
}

.session-item.solving-session:hover {
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--primary-100) 100%);
    border-color: var(--primary-300);
}

.session-item.solving-session .session-icon {
    background: var(--primary-100);
    color: var(--primary-700);
}

.session-item.solving-session .session-icon i,
.session-item.solving-session .session-icon svg {
    animation: spin 0.8s linear infinite;
}

/* Custom scrollbar for sessions list */
.sessions-list::-webkit-scrollbar {
    width: 4px;
}

.sessions-list::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 2px;
}

.sessions-list::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 2px;
}

.sessions-list::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* Sessions help text improvement */
.form-group .form-help {
    margin-top: 8px;
    font-size: 12px;
    color: var(--gray-500);
    line-height: 1.4;
    padding-left: 4px;
}

/* Read-only session message */
.session-readonly-message {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--warning-50);
    border: 1px solid var(--warning-200);
    border-radius: 8px;
    padding: 12px;
    margin-top: 8px;
    font-size: 13px;
    color: var(--warning-700);
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(251, 191, 36, 0.1);
}

.session-readonly-message:hover {
    background: var(--warning-100);
    border-color: var(--warning-300);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(251, 191, 36, 0.15);
}

.session-readonly-message i {
    flex-shrink: 0;
    margin-right: 6px;
}