:root {
    --bg-main: #f8f9fa;         /* Ein sehr helles, sauberes Off-White */
    --bg-sidebar: #ffffff;      /* Reines Weiß für das linke Menü */
    --bg-card: #ffffff;         /* Weiße Karten */
    --text-main: #1f2328;       /* Fast schwarzer, gut lesbarer Text */
    --text-muted: #656d76;      /* Angenehmes, dezentes Grau für Beschreibungen */
    --accent: #ff5722;          /* Dein kräftiges Laser-Orange */
    --sidebar-width: 260px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    overflow: hidden;
}

/* --- Layout --- */
.app-layout {
    display: flex;
    height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    background-color: var(--bg-sidebar);
    border-right: 1px solid #d0d7de;
    display: flex;
    flex-direction: column;
    transition: margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 100;
}

/* Der Zustand für das komplett versteckte Menü */
.sidebar.hidden {
    margin-left: calc(-1 * var(--sidebar-width));
}

.sidebar-nav {
    padding: 20px 0;
    padding-top: 20px;
}

.sidebar-nav ul {
    list-style: none;
}

.sidebar-nav a {
    display: block;
    padding: 15px 20px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 1.1rem;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    color: var(--text-main);
    background-color: rgba(255, 87, 34, 0.08);
    border-left: 3px solid var(--accent);
}

/* --- Main Content --- */
.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

/* Obere Leiste für den Button */
.top-bar {
    height: 70px;
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 0 30px;
    background-color: rgba(248, 249, 250, 0.9);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 90;
    border-bottom: 1px solid #d0d7de;
}

.top-bar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-right: auto;
}

.top-bar-logo {
    height: 35px;
    width: auto;
    display: block;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-main);
}

.logo-text .dot {
    color: var(--accent);
}

.toggle-btn {
    background: none;
    border: none;
    color: var(--text-main);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: auto;
}

.toggle-btn:hover {
    color: var(--accent);
}

/* Inhaltsbereich der einzelnen Seiten */
.page-content {
    padding: 40px 10%;
}

.highlight {
    color: var(--accent);
}

h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--text-main);
}

p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.img-placeholder {
    background-color: var(--bg-card);
    height: 250px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    border: 1px solid #d0d7de;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}