* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: transparent;
    color: #ffffff;
    height: 100vh;
    overflow: hidden;
    margin: 0;
    display: none;
    justify-content: center;
    align-items: center;
}

body.visible {
    display: flex;
}

.skill-map-container {
    width: 80vw;
    max-width: 1200px;
    height: 80vh;
    max-height: 800px;
    position: relative;
    overflow: hidden;
    display: none;
    background: #141517;
    border: 1px solid #2c2e33;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.skill-map-container.visible {
    display: flex;
    flex-direction: column;
}

/* Header Styles */
.app-header {
    height: 70px;
    border-bottom: 1px solid #2c2e33;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.skill-points-container {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 10px;
    background: rgba(0, 122, 255, 0.15);
    color: #007aff;
    font-weight: 600;
    font-size: 1.2em;
}

.skill-points-container i {
    font-size: 1.1em;
}

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

.skill-points {
    font-size: 1.4em;
    color: #007aff;
    font-weight: bold;
    letter-spacing: 1px;
}

.skill-points-label {
    color: #007aff;
    font-size: 0.9em;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
}

.skill-points-label i {
    color: #228be6;
    font-size: 1.1em;
}

.close-button {
    background: none;
    border: none;
    color: #909296;
    font-size: 1.2em;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 4px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-button:hover {
    color: #ffffff;
    background: #2c2e33;
}

/* Main Content Layout */
.main-content {
    flex: 1;
    display: flex;
    overflow: hidden;
}

/* Tab Navigation */
.skill-tabs {
    width: 200px;
    border-right: 1px solid #2c2e33;
    display: flex;
    flex-direction: column;
    padding: 16px 0;
}

.tab-button {
    background: none;
    border: none;
    color: #909296;
    padding: 16px 24px;
    cursor: pointer;
    text-align: left;
    font-size: 1em;
    font-weight: 500;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.tab-button:hover {
    color: #ffffff;
    background: #2c2e33;
}

.tab-button.active {
    color: #ffffff;
    background: #2c2e33;
    border-left-color: #007aff;
}

/* Skill Content Area */
.skill-content {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
}

.skill-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
    padding: 8px;
}

.skill-card {
    background: #1a1b1e;
    border: 1px solid #2c2e33;
    border-radius: 0;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
}

.skill-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.skill-card.owned::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: #007aff;
}

.skill-card-header {
    padding: 20px;
    border-bottom: 1px solid #2c2e33;
    position: relative;
}

.skill-card h2 {
    color: #ffffff;
    font-size: 1.2em;
    font-weight: 600;
    margin-bottom: 8px;
    padding-right: 100px;
}

.badge-container {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 8px;
}

.badge {
    padding: 4px 8px;
    border-radius: 0;
    font-size: 0.8em;
    font-weight: 600;
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    gap: 4px;
}

.level-badge {
    background: rgba(255, 59, 48, 0.15);
    color: #ff3b30;
}

.points-badge {
    background: rgba(0, 122, 255, 0.15);
    color: #007aff;
}

.restriction-badge {
    background: rgba(255, 149, 0, 0.15);
    color: #ff9500;
}

.restriction-badge.faction {
    background: rgba(88, 86, 214, 0.15);
    color: #5856d6;
}

.restriction-badge.civilian {
    background: rgba(52, 199, 89, 0.15);
    color: #34c759;
}

.restriction-badge.pd {
    background: rgba(255, 45, 85, 0.15);
    color: #ff2d55;
}

.badge i {
    font-size: 0.9em;
}

.skill-card-content {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.skill-desc {
    color: #ffffff;
    font-size: 0.99em;
    line-height: 1.6;
    margin-bottom: 20px;
    flex: 1;
}

.skill-cost {
    color: #909296;
    font-size: 0.9em;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.buy-button {
    width: 100%;
    padding: 14px;
    background: #1a1b1e;
    color: #ffffff;
    border: 1px solid #2c2e33;
    border-radius: 0;
    font-size: 1em;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
    margin-bottom: 12px;
}

.buy-button:hover:not(:disabled) {
    background: #2c2e33;
    border-color: #909296;
}

.buy-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.skill-card.owned .buy-button {
    background: rgba(0, 122, 255, 0.15);
    color: #007aff;
    border-color: #007aff;
    cursor: default;
}

.skill-card.locked {
    opacity: 0.7;
}

/* Restriction badge styles */
.skill-card-content .restriction-badge {
    width: 100%;
    justify-content: center;
    margin-top: 4px;
    font-size: 0.85em;
    padding: 6px 12px;
}

/* Scrollbar Styles */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #1a1b1e;
}

::-webkit-scrollbar-thumb {
    background: #2c2e33;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #909296;
}

/* Skill Nodes */
.skill-node {
    position: absolute;
    width: 48px;
    height: 48px;
    border-radius: 8px;
    background: #25262b;
    border: 1px solid #2c2e33;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

.skill-node:hover {
    border-color: #228be6;
    transform: translateY(-2px);
}

.skill-node.selected {
    border-color: #228be6;
    box-shadow: 0 0 20px rgba(34, 139, 230, 0.3);
}

.skill-node.owned {
    background: #228be6;
    border-color: #228be6;
}

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

.skill-node i {
    font-size: 1.4em;
    color: #ffffff;
}

.node-badge {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    background: #1a1b1e;
    color: #909296;
    font-size: 0.75em;
    padding: 2px 8px;
    border-radius: 4px;
    border: 1px solid #2c2e33;
    white-space: nowrap;
}

/* Skill Connections */
.skill-connection {
    position: absolute;
    height: 2px;
    background: #2c2e33;
    transform-origin: left center;
    pointer-events: none;
    transition: background 0.3s ease;
}

.skill-node.owned ~ .skill-connection {
    background: #228be6;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(34, 139, 230, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(34, 139, 230, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(34, 139, 230, 0);
    }
}

.header-title {
    color: #fff;
    font-size: 1.5rem;
    font-weight: bold;
    text-shadow: 0 0 10px rgba(0, 153, 255, 0.5);
}