:root {
    --sp-bg: #0b0f19;
    --sp-card: #151b27;
    --sp-surface: #1e2636;
    --sp-border: #2a3447;
    --sp-text: #f1f5f9;
    --sp-muted: #94a3b8;
    --sp-primary: #ff4d00;
    --sp-primary-glow: #ff7b29;
    --sp-accent: #3b82f6;
    --sp-radius: 14px;
    --sp-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    --sp-shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.6);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--sp-bg);
    color: var(--sp-text);
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--sp-border);
    padding: 0.75rem 1.25rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--sp-shadow);
}

.navbar .brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 900;
    font-size: 1.4rem;
    color: var(--sp-text);
    text-decoration: none;
    letter-spacing: -0.03em;
}

.navbar .brand img {
    height: 38px;
    width: 38px;
}

.navbar .brand span {
    background: linear-gradient(135deg, var(--sp-primary) 0%, #ffb700 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar .nav-links {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.navbar .nav-links a {
    color: var(--sp-muted);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 600;
    padding: 0.55rem 0.9rem;
    border-radius: 999px;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.navbar .nav-links a:hover,
.navbar .nav-links a.active {
    color: var(--sp-text);
    background: var(--sp-surface);
    box-shadow: inset 0 0 0 1px var(--sp-border);
}

.navbar .hamburger {
    display: none;
    background: transparent;
    border: none;
    color: var(--sp-text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.4rem;
}

main {
    padding: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

h1 {
    font-size: 1.75rem;
    font-weight: 800;
    margin: 0.5rem 0 1.2rem;
    letter-spacing: -0.02em;
}

h1 a {
    color: var(--sp-text);
    text-decoration: none;
}

h1 a:hover {
    color: var(--sp-primary-glow);
}

.crumbs {
    position: relative;
    z-index: 2;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: var(--sp-muted);
}

.crumbs a {
    color: var(--sp-accent);
    text-decoration: none;
}

.crumbs a:hover {
    text-decoration: underline;
}

.crumb-sep {
    margin: 0 0.35rem;
    color: var(--sp-border);
}

.tree {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tree li.branch {
    margin: 0.75rem 0;
}

.branch-group {
    border: 1px solid var(--sp-border);
    border-radius: var(--sp-radius);
    background: var(--sp-card);
    padding: 0.9rem 1.1rem;
    box-shadow: var(--sp-shadow);
}

.branch-name {
    font-weight: 800;
    color: var(--sp-text);
    font-size: 1.05rem;
}

.branch-name summary {
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    outline: none;
    user-select: none;
}

.branch-name summary::-webkit-details-marker,
.branch-name summary::marker {
    display: none;
}

.branch-name summary::before {
    content: "▾";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.6rem;
    height: 1.6rem;
    margin-right: 0.5rem;
    border-radius: 6px;
    color: var(--sp-primary-glow);
    font-size: 0.9rem;
    background: var(--sp-surface);
    transition: transform 0.15s ease, background 0.15s ease;
}

.branch-name summary:hover::before {
    background: rgba(255, 77, 0, 0.15);
}

.branch-group[open] > .branch-name summary::before {
    transform: rotate(0deg);
}

.branch-group:not([open]) > .branch-name summary::before {
    transform: rotate(-90deg);
}

.branch-count {
    margin-left: 0.5rem;
    font-weight: 600;
    color: var(--sp-muted);
    font-size: 0.85rem;
}

.branch-name.empty {
    color: var(--sp-muted);
    margin: 0.2rem 0;
}

.children {
    list-style: none;
    margin: 0.75rem 0 0 0;
    padding: 0;
    font-size: 0.95rem;
    border-left: 2px solid var(--sp-border);
    padding-left: 1rem;
}

.children li {
    margin: 0.5rem 0;
    padding: 0.25rem 0;
}

.children a {
    color: var(--sp-accent);
    text-decoration: none;
    font-weight: 600;
}

.children a:hover {
    color: var(--sp-primary-glow);
    text-decoration: underline;
}

.children .child-detail,
.children .child-text span {
    color: var(--sp-muted);
}

.entity-hero {
    background:
        radial-gradient(circle at 20% 0%, rgba(255, 77, 0, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 100%, rgba(59, 130, 246, 0.12) 0%, transparent 40%),
        linear-gradient(135deg, #111827 0%, #0f172a 70%, #1e1b4b 100%);
    border-bottom: 1px solid var(--sp-border);
    padding: 2.5rem 1.5rem 4rem;
    margin: 0 -1.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.entity-hero h1 {
    font-size: 2.4rem;
    font-weight: 900;
    margin: 0;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    color: var(--sp-text);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.entity-hero h1 a {
    color: var(--sp-text);
    text-decoration: none;
}

.entity-hero h1 a:hover {
    color: var(--sp-primary-glow);
}

.entity-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url('/Sportify/images/Sportify_logo.svg');
    background-repeat: no-repeat;
    background-position: 92% 15%;
    background-size: 180px;
    opacity: 0.07;
    pointer-events: none;
}

.entity-count {
    margin: 1rem 0 0;
    color: var(--sp-muted);
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    z-index: 1;
}

.entity-content {
    padding-top: 2rem;
}

.child-text {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
    font-size: 1rem;
    font-weight: 600;
}

.child-detail {
    color: var(--sp-muted);
    font-weight: 500;
    font-size: 0.92rem;
}

.child-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin: 0.4rem 0 0;
    padding: 0;
    list-style: none;
}

.child-links li a,
.child-links li span {
    background: var(--sp-surface);
    border: 1px solid var(--sp-border);
    color: var(--sp-muted);
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    font-size: 0.78rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.15s ease;
}

.child-links li a:hover {
    background: rgba(255, 77, 0, 0.12);
    color: var(--sp-primary-glow);
    border-color: rgba(255, 77, 0, 0.4);
}

@media (max-width: 700px) {
    .navbar {
        flex-wrap: wrap;
    }

    .navbar .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0.3rem;
        padding-top: 0.8rem;
    }

    .navbar .nav-links.open {
        display: flex;
    }

    .navbar .nav-links a {
        width: 100%;
        text-align: center;
        padding: 0.85rem;
        font-size: 1.05rem;
    }

    .navbar .hamburger {
        display: block;
    }

    main {
        padding: 1rem;
    }

    h1 {
        font-size: 1.5rem;
    }
}