/* Skill Tree Styles - Design System Compliant */

.skill-tree-tabs {
    display: flex;
    gap: var(--spacing-xs, 8px);
    margin-bottom: var(--spacing-lg, 24px);
    border-bottom: 1px solid var(--surface-2, #252A33);
    padding-bottom: var(--spacing-sm, 8px);
}

.skill-tab {
    background: transparent;
    border: 1px solid var(--surface-2, #252A33);
    color: var(--text-secondary, #A1A7B3);
    padding: var(--spacing-sm, 8px) var(--spacing-md, 16px);
    cursor: pointer;
    border-radius: 4px 4px 0 0;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    font-family: 'Roboto Mono', monospace;
    text-transform: uppercase;
}

.skill-tab:hover {
    color: var(--signal-cyan, #00F0FF);
    border-color: var(--signal-cyan, #00F0FF);
}

.skill-tab.active {
    background: rgba(0, 240, 255, 0.1);
    border-color: var(--signal-cyan, #00F0FF);
    color: var(--signal-cyan, #00F0FF);
    border-bottom-color: transparent;
}

#skill-tree-container {
    max-height: 400px;
    overflow-y: auto;
    margin-bottom: 2rem;
    padding-right: 0.5rem;
}

.skill-tree-wrapper {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.skill-tree-section {
    background: var(--surface-1, #1A1D23);
    border: 1px solid var(--surface-2, #252A33);
    padding: var(--spacing-lg, 24px);
    border-radius: 4px;
}

.skill-tree-section h4 {
    color: var(--signal-cyan, #00F0FF);
    margin-bottom: var(--spacing-sm, 8px);
    font-size: 1.1rem;
    font-family: 'Orbitron', sans-serif;
}

.tree-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.skills-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.skill-item {
    background: var(--surface-0, #121418);
    border: 1px solid var(--surface-2, #252A33);
    padding: var(--spacing-md, 16px);
    border-radius: 4px;
    transition: all 0.2s ease;
}

.skill-item:hover:not(.locked) {
    border-color: var(--signal-cyan, #00F0FF);
    background: rgba(0, 240, 255, 0.05);
}

.skill-item.purchased {
    border-color: var(--signal-amber, #FFB800);
    background: rgba(255, 184, 0, 0.1);
    box-shadow: 0 0 10px rgba(255, 184, 0, 0.2);
}

.skill-item.locked {
    opacity: 0.5;
    cursor: not-allowed;
}

.skill-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.skill-level-badge {
    background: var(--signal-cyan, #00F0FF);
    color: var(--surface-0, #121418);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: bold;
}

.skill-item.purchased .skill-level-badge {
    background: var(--signal-amber, #FFB800);
    color: var(--surface-0, #121418);
}

.skill-name {
    flex: 1;
    font-weight: bold;
    color: var(--text-primary);
}

.skill-cost {
    color: var(--signal-cyan, #00F0FF);
    font-weight: bold;
    font-size: 0.9rem;
}

.skill-description {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.prerequisite {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-top: 0.5rem;
}

.skill-level-1 {
    border-left: 3px solid var(--signal-cyan, #00F0FF);
}

.skill-level-2 {
    border-left: 3px solid var(--signal-amber, #FFB800);
    margin-left: 1rem;
}

.skill-level-3 {
    border-left: 3px solid var(--signal-crimson, #FF2A2A);
    margin-left: 2rem;
}

.selected-skills-summary {
    background: var(--surface-1, #1A1D23);
    border: 1px solid var(--surface-2, #252A33);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.selected-skills-summary h4 {
    color: var(--signal-cyan, #00F0FF);
    margin-bottom: 1rem;
    font-size: 1rem;
}

.selected-skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.selected-skill-item {
    background: rgba(189, 0, 255, 0.2);
    border: 1px solid var(--neon-purple);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.btn-remove-skill {
    background: transparent;
    border: none;
    color: var(--neon-pink);
    cursor: pointer;
    font-size: 1.2rem;
    line-height: 1;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.btn-remove-skill:hover {
    background: var(--neon-pink);
    color: #000;
}

.no-skills {
    color: var(--text-secondary);
    font-style: italic;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .skill-tree-tabs {
        flex-wrap: wrap;
    }
    
    .skill-level-2,
    .skill-level-3 {
        margin-left: 0.5rem;
    }
}