/* IT Abitur - Shared Styles */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;700&display=swap');

/* Base Styles */
:root {
    --bg-primary: #0f172a;
    --bg-secondary: rgba(30, 41, 59, 0.4);
    --border-color: rgba(255, 255, 255, 0.08);
    --accent-blue: #3b82f6;
    --accent-purple: #6366f1;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

.mono { font-family: 'JetBrains Mono', monospace; }

/* Premium Glassmorphism */
.glass-panel {
    background: var(--bg-secondary);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.glass-card {
    background: rgba(30, 41, 59, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
    background: rgba(30, 41, 59, 0.6);
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
}

/* Custom UI Components */
.premium-range {
    -webkit-appearance: none;
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    outline: none;
}
.premium-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px; height: 24px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.5);
    border: 2px solid white;
}

.premium-header { margin-bottom: 3rem; }
.premium-title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 1.2;
}
.gradient-text {
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    background-image: linear-gradient(to right, #60a5fa, #a855f7);
}

.category-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-blue);
    border: 1px solid rgba(59, 130, 246, 0.2);
    margin-bottom: 1rem;
}

.result-item {
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 1.25rem;
    border-radius: 16px;
    transition: all 0.3s ease;
}

/* ============================================
   SIDEBAR NAVIGATION
   ============================================ */

.sidebar-wrapper {
    position: fixed;
    left: 0; top: 0; bottom: 0;
    z-index: 1000;
    pointer-events: none;
    width: 260px;
    transition: width 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    overflow: visible;
}

.sidebar-wrapper:has(.sidebar-collapsed) {
    width: 80px;
}

.sidebar {
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 100%;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 41, 59, 0.95) 100%);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0 24px 24px 0;
    overflow-y: auto;
    pointer-events: auto;
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    box-shadow: 10px 0 50px rgba(0, 0, 0, 0.5);
    scrollbar-width: none;
}
.sidebar::-webkit-scrollbar { display: none; }

.sidebar-toggle {
    position: fixed;
    left: 242px;
    top: 24px;
    z-index: 2000;
    background: #1e293b;
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #f1f5f9;
    width: 36px; height: 36px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 10px;
    cursor: pointer;
    pointer-events: auto;
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.sidebar-toggle.is-collapsed { left: 62px; }
.sidebar-toggle:hover { background: #3b82f6; border-color: #60a5fa; transform: scale(1.1); }

/* Logo Styles */
.sidebar-header {
    padding: 24px 20px;
    height: 84px;
    display: flex; align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.logo { display: flex; align-items: center; gap: 14px; }
.logo-icon {
    width: 42px; height: 42px;
    background: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    color: white; font-size: 20px;
    box-shadow: 0 8px 16px rgba(59, 130, 246, 0.3);
}
.logo-text {
    font-size: 20px; font-weight: 700; color: #f1f5f9;
}

/* Tree Navigation */
.tree-nav { padding: 12px 0; }
.tree-folder-header {
    display: flex; align-items: center; gap: 12px;
    padding: 12px 16px; margin: 2px 12px;
    cursor: pointer; color: #94a3b8; font-size: 12px;
    text-transform: uppercase; letter-spacing: 0.1em;
    border-radius: 12px; transition: all 0.2s;
}
.tree-folder-header:hover { background: rgba(255, 255, 255, 0.05); color: white; }
.tree-folder-header .folder-icon { font-size: 16px; width: 24px; text-align: center; }
.tree-folder-header .toggle-icon { margin-left: auto; font-size: 10px; transition: 0.3s; }
.tree-folder.expanded .toggle-icon { transform: rotate(90deg); }

.nav-link {
    display: flex; align-items: center; gap: 14px;
    padding: 10px 16px 10px 52px; margin: 2px 12px;
    color: #64748b; font-size: 14px; border-radius: 10px;
    transition: all 0.2s;
}
.nav-link:hover { color: white; transform: translateX(4px); }
.nav-link.active {
    background: rgba(59, 130, 246, 0.1);
    color: #60a5fa; font-weight: 600;
}

/* COLLAPSED STATE STYLES */
.sidebar-collapsed .logo-text,
.sidebar-collapsed .tree-folder-header span,
.sidebar-collapsed .tree-folder-header .toggle-icon,
.sidebar-collapsed .nav-link span {
    display: none;
}

.sidebar-collapsed .sidebar-header { justify-content: center; padding: 24px 0; }
.sidebar-collapsed .tree-folder-header { justify-content: center; margin: 4px 8px; padding: 12px 0; }
.sidebar-collapsed .folder-icon { font-size: 22px; width: 40px; }

.sidebar-collapsed .nav-link { justify-content: center; padding: 12px 0; margin: 4px 8px; }
.sidebar-collapsed .nav-link i { font-size: 20px; }

.sidebar-collapsed .tree-children { display: none; }

/* Main Content Adjustments */
.main-content {
    margin-left: 260px;
    width: calc(100% - 260px);
    transition: 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}
body:has(.sidebar-collapsed) .main-content {
    margin-left: 80px;
    width: calc(100% - 80px);
}

/* MOBILE RESPONSIVE */
@media (max-width: 1024px) {
    .sidebar-wrapper { width: 0; }
    .sidebar {
        transform: translateX(-110%);
        width: 280px; z-index: 2100;
        visibility: hidden;
    }
    .sidebar.open { transform: translateX(0); visibility: visible; }
    .main-content { margin-left: 0 !important; width: 100% !important; padding-top: 80px !important; }
    .sidebar-toggle { left: 20px !important; top: 20px; z-index: 3000; width: 48px; height: 48px; background: #3b82f6; border-radius: 14px; }
    .sidebar-backdrop {
        position: fixed; inset: 0; background: rgba(0, 0, 0, 0.6);
        backdrop-filter: blur(8px); z-index: 1900;
        opacity: 0; visibility: hidden; transition: 0.4s;
    }
    .sidebar-backdrop.active { opacity: 1; visibility: visible; pointer-events: auto; }
}

/* Animations */
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.animate-fade-in { animation: fadeIn 0.5s ease forwards; }

/* Custom Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(100, 116, 139, 0.2); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: rgba(100, 116, 139, 0.4); }