/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-dark: #1a1a2e;
    --color-card: #16213e;
    --color-border: #374151;
    --color-accent: #fbbf24;
    --color-text: #e5e7eb;
    --color-muted: #9ca3af;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--color-dark);
    color: var(--color-text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.hidden {
    display: none !important;
}

.container {
    max-width: 672px;
    margin: 0 auto;
    padding: 0 16px;
}

/* Header */
header {
    position: sticky;
    top: 0;
    background: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
    z-index: 50;
    padding: 0 16px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.menu-btn {
    display: none;
    position: absolute;
    left: 12px;
    padding: 8px;
    background: transparent;
    border: none;
    color: var(--color-text);
    cursor: pointer;
}

#class-nav {
    display: flex;
    gap: 4px;
    margin-right: 24px;
}

/* Mobile Menu */
#mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
}

#mobile-menu-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    padding: 24px;
    background: var(--color-card);
    border-radius: 16px;
    border: 1px solid var(--color-border);
}

.mobile-class-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.mobile-class-btn:hover,
.mobile-class-btn.active {
    border-color: var(--color-accent);
    background: rgba(251, 191, 36, 0.1);
}

.mobile-class-btn img {
    width: 48px;
    height: 48px;
    border-radius: 8px;
}

.mobile-class-btn span {
    font-size: 12px;
    color: var(--color-muted);
}

.class-icon-btn {
    padding: 8px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    background: transparent;
    cursor: pointer;
    transition: all 0.2s;
}

.class-icon-btn:hover {
    border-color: rgba(251, 191, 36, 0.5);
}

.class-icon-btn.active {
    border: 2px solid var(--color-accent);
    background: rgba(26, 26, 46, 0.5);
}

.class-icon-btn img {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    object-fit: cover;
    display: block;
}

#header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

#points-display {
    font-size: 14px;
}

#points-spent {
    color: var(--color-accent);
    font-weight: bold;
}

#points-max {
    color: var(--color-muted);
}

#reset-btn {
    padding: 8px;
    background: transparent;
    border: none;
    color: var(--color-muted);
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.2s;
}

#reset-btn:hover {
    color: white;
    background: var(--color-card);
}

#share-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--color-accent);
    color: var(--color-dark);
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

#share-btn:hover {
    filter: brightness(1.1);
}

/* Main */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Class Selection */
#class-selection {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

#class-selection h1 {
    font-size: 24px;
    margin-bottom: 32px;
}

#class-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    max-width: 400px;
}

.class-select-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.class-select-btn:hover {
    border-color: rgba(251, 191, 36, 0.5);
}

.class-select-btn img {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    object-fit: cover;
}

.class-select-btn span {
    font-size: 12px;
    color: var(--color-muted);
}

.class-select-btn:hover span {
    color: var(--color-text);
}

/* Calculator */
#calculator {
    flex: 1;
    padding: 16px 8px;
}

#mobile-tabs {
    display: flex;
    position: sticky;
    top: 56px;
    background: var(--color-dark);
    border-bottom: 1px solid var(--color-border);
    z-index: 40;
    margin-bottom: 16px;
}

.mobile-tab {
    flex: 1;
    padding: 12px;
    text-align: center;
    font-size: 12px;
    font-weight: 500;
    color: var(--color-muted);
    background: transparent;
    border: none;
    cursor: pointer;
    position: relative;
    transition: color 0.2s;
}

.mobile-tab.active {
    color: var(--color-accent);
}

.mobile-tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-accent);
}

#talent-trees {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.talent-tree {
    flex: 1;
    min-width: 320px;
    max-width: 360px;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
}

.tree-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    background: rgba(0, 0, 0, 0.6);
    border-bottom: 1px solid var(--color-border);
}

.tree-header h3 {
    font-size: 20px;
    font-weight: bold;
}

.tree-header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.tree-points {
    font-size: 18px;
    font-weight: bold;
    color: var(--color-accent);
}

.tree-reset-btn {
    padding: 4px;
    background: transparent;
    border: none;
    color: var(--color-muted);
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
}

.tree-reset-btn:hover {
    color: var(--color-accent);
    background: rgba(26, 26, 46, 0.5);
}

.tree-content {
    position: relative;
    padding: 24px;
    min-height: 600px;
    background: #0f1115;
}

.tree-arrows {
    position: absolute;
    top: 24px;
    left: 24px;
    pointer-events: none;
    z-index: 0;
}

.tree-grid {
    position: relative;
    display: grid;
    grid-template-columns: repeat(4, 64px);
    grid-template-rows: repeat(9, 64px);
    gap: 16px;
    justify-content: center;
    z-index: 1;
}

.talent-icon {
    width: 64px;
    height: 64px;
    position: relative;
    cursor: pointer;
    border-radius: 8px;
    overflow: hidden;
    border: 2px solid var(--color-border);
    transition: all 0.2s;
}

.talent-icon.available {
    border-color: #22c55e;
}

.talent-icon.maxed {
    border-color: var(--color-accent);
}

.talent-icon.locked {
    filter: grayscale(1);
    opacity: 0.5;
    cursor: not-allowed;
}

.talent-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.talent-points {
    position: absolute;
    bottom: 2px;
    right: 2px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    font-size: 11px;
    font-weight: bold;
    padding: 1px 4px;
    border-radius: 4px;
}

.talent-icon.maxed .talent-points {
    color: var(--color-accent);
}

/* FAQ */
#faq {
    padding: 48px 16px;
    background: var(--color-dark);
    border-top: 1px solid var(--color-border);
}

#faq h2 {
    font-size: 24px;
    text-align: center;
    margin-bottom: 32px;
}

#faq dl {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 16px;
}

.faq-item dt h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.faq-item dd p {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.5;
}

/* Footer */
footer {
    padding: 24px 16px;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

footer address {
    font-style: normal;
    font-size: 14px;
    color: var(--color-muted);
}

/* Tooltip */
#tooltip {
    position: fixed;
    z-index: 100;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 12px;
    max-width: 300px;
    pointer-events: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

#tooltip h4 {
    font-size: 14px;
    color: var(--color-accent);
    margin-bottom: 4px;
}

#tooltip .rank {
    font-size: 12px;
    color: var(--color-muted);
    margin-bottom: 8px;
}

#tooltip .desc {
    font-size: 13px;
    color: var(--color-text);
    line-height: 1.4;
}

/* Responsive */
@media (max-width: 768px) {
    .menu-btn {
        display: block;
    }
    
    #class-nav .class-icon-btn {
        display: none;
    }
    
    #class-nav .class-icon-btn.active {
        display: block;
    }
    
    .talent-tree {
        display: none;
    }
    
    .talent-tree.active {
        display: block;
    }
}

@media (min-width: 769px) {
    #mobile-tabs {
        display: none;
    }
    
    .talent-tree {
        display: block !important;
    }
}