:root {
    --bg-color: #0d1117;
    --panel-bg: rgba(22, 27, 34, 0.85);
    --border-color: #30363d;
    --primary-color: #e5a93d;
    --primary-hover: #f1c453;
    --text-main: #e6edf3;
    --text-muted: #8b949e;
    --diamond-size: 70px;
    --diamond-inner: rgba(48, 54, 61, 0.7);
    --diamond-active-bg: rgba(229, 169, 61, 0.15);
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, sans-serif;
    background-color: var(--bg-color);
    background-image: radial-gradient(circle at top, #1f242e 0%, #0d1117 80%);
    color: var(--text-main);
    min-height: 100vh;
}

.marketing-header {
    background: linear-gradient(90deg, #1e1b4b, #312e81);
    border-bottom: 2px solid #4f46e5;
    padding: 12px 20px;
    text-align: center;
}

.marketing-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.ad-text {
    font-weight: 600;
    color: #e0e7ff;
    letter-spacing: 1px;
}

.youtube-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: transform 0.2s;
    flex-wrap: nowrap;
}

.youtube-link:hover {
    transform: scale(1.05);
}

.youtube-link span {
    white-space: nowrap;
}

.btn {
    background-color: var(--primary-color);
    color: #000;
    border: none;
    padding: 8px 16px;
    font-weight: bold;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(229, 169, 61, 0.4);
}

.app-container {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 20px;
}

.class-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    padding: 12px 24px;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s;
    font-weight: 600;
}

.tab-btn:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.main-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
}

.points-indicator {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 30px;
    text-align: center;
    background: var(--panel-bg);
    padding: 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}


.skill-tree-grid {
    display: flex;
    flex-direction: column;
    gap: 60px;
    align-items: center;
    padding: 20px 0;
}

.skill-row {
    display: flex;
    gap: 50px;
    opacity: 1;
    transition: opacity 0.4s ease;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
}

.skill-row:hover {
    z-index: 10;
}

.skill-row.locked {
    opacity: 0.2;
    pointer-events: none;
    filter: grayscale(100%);
}

.skill-node-wrapper {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 1;
}

.skill-node-wrapper:hover {
    z-index: 20;
}


.skill-diamond {
    width: var(--diamond-size);
    height: var(--diamond-size);
    background-color: var(--diamond-inner);
    border: 2px solid var(--border-color);
    transform: rotate(45deg);
    cursor: pointer;
    position: relative;
    transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.6);
}

.skill-diamond-inner {
    transform: rotate(-45deg);
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
}

.skill-diamond:hover {
    border-color: #fff;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.4);
    transform: rotate(45deg) scale(1.1);
}

.skill-diamond.active {
    border-color: var(--primary-color);
    background-color: var(--diamond-active-bg);
    box-shadow: 0 0 20px rgba(229, 169, 61, 0.6);
}

.skill-diamond.selected {
    border-color: #fff;
    box-shadow: 0 0 25px rgba(255, 255, 255, 0.8), inset 0 0 20px rgba(255, 255, 255, 0.3);
}

.skill-diamond.maxed {
    border-color: #10b981;
    background-color: rgba(16, 185, 129, 0.15);
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.6);
}

.points-badge {
    position: absolute;
    bottom: -35px;
    background: #010409;
    border: 1px solid var(--border-color);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: bold;
    z-index: 10;
    transition: all 0.3s;
}

.points-badge.filled {
    color: #10b981;
    border-color: #10b981;
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.3);
}


.skill-detail-card {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    gap: 20px;
    min-height: 250px;
}

.detail-header {
    display: flex;
    gap: 25px;
    align-items: center;
}

.detail-icon-frame {
    width: 80px;
    height: 80px;
    background-color: var(--diamond-inner);
    border: 2px solid var(--primary-color);
    transform: rotate(45deg);
    flex-shrink: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 0 20px rgba(229, 169, 61, 0.3);
    margin-left: 15px;
}

.detail-icon-inner {
    width: 100%;
    height: 100%;
    transform: rotate(-45deg);
    background-size: cover;
    background-position: center;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
}

.detail-title-area {
    flex-grow: 1;
}

.detail-title {
    font-size: 1.6rem;
    font-weight: bold;
    color: var(--primary-color);
    margin: 0 0 5px 0;
}

.detail-points {
    color: #10b981;
    font-weight: bold;
    font-size: 1.1rem;
    margin: 0;
}

.detail-desc-area {
    background: rgba(0, 0, 0, 0.4);
    border-radius: 8px;
    padding: 15px;
    border-left: 3px solid #6366f1;
}

.detail-desc-item {
    font-size: 1.05rem;
    line-height: 1.6;
    color: #e2e8f0;
    margin-bottom: 15px;
}

.detail-desc-item:last-child {
    margin-bottom: 0;
}

.detail-btn-allocate {
    background: linear-gradient(135deg, var(--primary-color), #ca8a04);
    color: #000;
    font-size: 1.2rem;
    padding: 15px;
    border: none;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(229, 169, 61, 0.4);
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.detail-btn-allocate:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(229, 169, 61, 0.6);
}

.detail-btn-allocate:disabled {
    background: #334155;
    color: #94a3b8;
    box-shadow: none;
    cursor: not-allowed;
    transform: none;
}


.stats-panel {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    height: fit-content;
    backdrop-filter: blur(10px);
    position: sticky;
    top: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
    margin-bottom: 20px;
}

.panel-header h2 {
    margin: 0;
    font-size: 1.3rem;
}

.btn-reset-icon {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    width: 36px;
    height: 36px;
    opacity: 1;
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border-radius: 5px;
}

.btn-reset-icon:hover {
    transform: scale(1.1);
}

.btn-reset-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.stat-item {
    background: rgba(1, 4, 9, 0.5);
    padding: 8px 12px;
    border-radius: 6px;
    border-left: 3px solid var(--primary-color);
    margin-bottom: 6px;
    line-height: 1.35;
    font-size: 0.85rem;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateX(10px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.class-stat-w {
    border-left-color: #ef4444;
}

.class-stat-m {
    border-left-color: #a855f7;
}

.class-stat-e {
    border-left-color: #eab308;
}


@media (max-width: 900px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .skill-tree-grid {
        gap: 30px;
        padding: 10px 0;
    }

    .skill-row {
        gap: 25px;
    }

    .skill-diamond {
        --diamond-size: 55px;
    }

    .stats-panel {
        position: static;
        margin-top: 20px;
    }

    .marketing-content {
        flex-direction: column;
        gap: 10px;
    }
}