:root {
    /* Light Mode (Standard) */
    --bg-primary: #FAFAFA;
    --bg-secondary: #FFFFFF;
    --bg-accent: #F0F0F0;
    --text-primary: #1A1A1A;
    --text-secondary: #4A4A4A;
    --text-muted: #888888;
    --border-color: #E0E0E0;
    --accent-red: #E63946;
    --accent-blue: #1D3557;
    --accent-yellow: #F4A261;
    --accent-green: #2A9D8F;
    --link-color: #1D3557;
    --link-hover: #E63946;
    --button-bg: #1A1A1A;
    --button-text: #FFFFFF;
    --button-hover: #333333;
    --flash-error-bg: #FFE0E0;
    --flash-error-text: #900;
    --flash-success-bg: #E0FFE0;
    --flash-success-text: #090;
    --flash-info-bg: #E0E0FF;
    --flash-info-text: #009;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --transition: 0.3s ease;
}

[data-theme="dark"] {
    --bg-primary: #121212;
    --bg-secondary: #1E1E1E;
    --bg-accent: #2A2A2A;
    --text-primary: #E8E8E8;
    --text-secondary: #B0B0B0;
    --text-muted: #707070;
    --border-color: #333333;
    --link-color: #7DAFCF;
    --link-hover: #E63946;
    --button-bg: #E8E8E8;
    --button-text: #121212;
    --button-hover: #CCCCCC;
    --flash-error-bg: #3D1515;
    --flash-error-text: #FF8080;
    --flash-success-bg: #153D15;
    --flash-success-text: #80FF80;
    --flash-info-bg: #15153D;
    --flash-info-text: #8080FF;
    --shadow: 0 2px 8px rgba(0,0,0,0.3);
}

/* Reset und Basis */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition), color var(--transition);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.site-header {
    background-color: var(--bg-secondary);
    border-bottom: 3px solid var(--accent-red);
    padding: 0 20px;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}
.site-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: 2px;
    text-transform: uppercase;
}
.site-logo:hover { color: var(--accent-red); }

/* Navigation */
.site-nav { display: flex; align-items: center; gap: 15px; }
.site-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all var(--transition);
}
.site-nav a:hover {
    color: var(--link-hover);
    background-color: var(--bg-accent);
}
.nav-user { font-weight: 600; color: var(--text-primary) !important; }

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}
.theme-toggle:hover {
    border-color: var(--accent-yellow);
    transform: rotate(30deg);
}

/* Hauptbereich */
.site-main {
    flex: 1;
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    padding: 40px 20px;
}
.site-main.wide { max-width: 1200px; }

/* Flash-Messages */
.flash-messages { margin-bottom: 20px; }
.flash {
    padding: 12px 16px;
    margin-bottom: 10px;
    border-radius: 4px;
    border-left: 4px solid;
    animation: slideIn 0.3s ease;
}
.flash.error { background: var(--flash-error-bg); color: var(--flash-error-text); border-color: var(--accent-red); }
.flash.success { background: var(--flash-success-bg); color: var(--flash-success-text); border-color: var(--accent-green); }
.flash.info { background: var(--flash-info-bg); color: var(--flash-info-text); border-color: var(--accent-blue); }
.flash.message { background: var(--flash-info-bg); color: var(--flash-info-text); border-color: var(--accent-blue); }

@keyframes slideIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Formulare */
.form-container { max-width: 400px; margin: 0 auto; }
.form-container h1 {
    text-align: center;
    margin-bottom: 30px;
    font-weight: 300;
    font-size: 2rem;
    letter-spacing: 1px;
}
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
}
.form-group input {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: border-color var(--transition);
}
.form-group input:focus {
    outline: none;
    border-color: var(--accent-blue);
}
.form-errors { color: var(--accent-red); font-size: 0.85rem; margin-top: 4px; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    text-align: center;
}
.btn-primary {
    width: 100%;
    background: var(--button-bg);
    color: var(--button-text);
}
.btn-primary:hover {
    background: var(--button-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

/* Links */
a { color: var(--link-color); transition: color var(--transition); }
a:hover { color: var(--link-hover); }
.text-center { text-align: center; }
.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }

/* Footer */
.site-footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 20px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}
.site-footer a {
    color: var(--text-muted);
    margin: 0 10px;
}
.site-footer a:hover { color: var(--link-hover); }

/* Bauhaus-Dekorstreifen */
.bauhaus-stripe {
    height: 4px;
    background: linear-gradient(to right, var(--accent-red) 33%, var(--accent-yellow) 33%, var(--accent-yellow) 66%, var(--accent-blue) 66%);
}

/* Hero-Bereich für Startseite */
.hero {
    text-align: center;
    padding: 60px 20px;
}
.hero h1 {
    font-size: 2.5rem;
    font-weight: 300;
    letter-spacing: 3px;
    margin-bottom: 10px;
}
.hero .subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
}

/* Sprachumschalter */
.lang-switcher {
    display: flex;
    gap: 4px;
    align-items: center;
}
.lang-switcher a, .lang-switcher span {
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: 3px;
    text-decoration: none;
    transition: all var(--transition);
}
.lang-active {
    background: var(--accent-blue);
    color: white !important;
    font-weight: 600;
}
.lang-link {
    color: var(--text-muted) !important;
}
.lang-link:hover {
    color: var(--text-primary) !important;
    background: var(--bg-accent);
}

/* Dashboard */
.dashboard-header {
    text-align: center;
    padding: 30px 0;
}
.dashboard-header h1 {
    font-weight: 300;
    font-size: 2rem;
    letter-spacing: 1px;
    margin-bottom: 5px;
}
.dashboard-header .subtitle {
    color: var(--text-muted);
}

/* Kachelraster */
.tile-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    padding: 20px 0;
}

.tile {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 30px 20px;
    text-align: center;
    position: relative;
    transition: all var(--transition);
    box-shadow: var(--shadow);
    user-select: none;
}
.tile:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    border-color: var(--accent-blue);
}

/* Griff zum Verschieben */
.tile-handle {
    position: absolute;
    top: 8px;
    right: 10px;
    font-size: 1.1rem;
    color: var(--text-muted);
    cursor: grab;
    padding: 4px 8px;
    border-radius: 4px;
    line-height: 1;
    letter-spacing: -2px;
    transition: all var(--transition);
    touch-action: none;
}
.tile-handle:hover {
    color: var(--accent-red);
    background: var(--bg-accent);
}
.tile-handle:active {
    cursor: grabbing;
}

.tile-icon { font-size: 3rem; margin-bottom: 15px; }
.tile-title { font-size: 1.2rem; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); }
.tile-desc { font-size: 0.85rem; color: var(--text-muted); }

/* Drag & Drop */
.tile-ghost { opacity: 0.3; border: 2px dashed var(--accent-yellow); }
.tile-chosen { transform: rotate(2deg) scale(1.05); box-shadow: 0 12px 32px rgba(0,0,0,0.2); border-color: var(--accent-red); }
.tile-drag { opacity: 0.9; }

/* Seitenkopf mit Aktion */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--border-color);
}
.page-header h1 {
    font-weight: 300;
    font-size: 1.8rem;
    letter-spacing: 1px;
}

/* Buttons Ergaenzungen */
.btn-accent {
    background: var(--accent-blue);
    color: #FFFFFF;
    padding: 10px 20px;
}
.btn-accent:hover { background: var(--accent-red); color: #FFFFFF; }
.btn-secondary {
    background: var(--bg-accent);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 10px 20px;
}
.btn-secondary:hover { border-color: var(--accent-blue); }
.btn-danger {
    background: transparent;
    color: var(--accent-red);
    border: 2px solid var(--accent-red);
    padding: 10px 20px;
}
.btn-danger:hover { background: var(--accent-red); color: #FFFFFF; }
.btn-link { color: var(--link-color); font-size: 0.9rem; text-decoration: none; }
.btn-link:hover { color: var(--link-hover); }

/* Karten-Raster fuer Listen */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}
.item-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition);
    box-shadow: var(--shadow);
    display: block;
}
.item-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-blue);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    color: var(--text-primary);
}
.item-card-image {
    height: 160px;
    background: var(--bg-accent);
    display: flex;
    align-items: center;
    justify-content: center;
}
.item-placeholder { font-size: 3rem; opacity: 0.4; }
.item-placeholder-large { font-size: 5rem; opacity: 0.4; }
.item-card-title {
    padding: 14px 16px;
    font-weight: 600;
    font-size: 1rem;
}

/* Leerer Zustand */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}
.empty-state p { margin-bottom: 20px; }

/* Detailseite */
.detail-page { max-width: 700px; margin: 0 auto; }
.detail-image {
    height: 240px;
    background: var(--bg-accent);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 28px;
}
.detail-field { margin-bottom: 20px; }
.detail-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 4px;
}
.detail-value { color: var(--text-primary); white-space: pre-line; }
.detail-actions {
    display: flex;
    gap: 12px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 2px solid var(--border-color);
}
.detail-actions form { margin: 0; }

/* Textarea im Bauhaus-Stil */
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: border-color var(--transition);
    resize: vertical;
}
.form-group textarea:focus { outline: none; border-color: var(--accent-blue); }

/* Anklickbare Kachel */
.tile-clickable { cursor: pointer; }

/* Responsive */
@media (max-width: 768px) {
    .header-inner { height: 50px; }
    .site-logo { font-size: 1.2rem; }
    .site-nav { gap: 8px; }
    .site-nav a { font-size: 0.8rem; padding: 4px 6px; }
    .site-main { padding: 20px 15px; }
    .hero h1 { font-size: 1.8rem; }
    .hero { padding: 30px 15px; }
    .lang-switcher { gap: 2px; }
    .lang-switcher a, .lang-switcher span { font-size: 0.65rem; padding: 2px 4px; }
    .tile-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .tile-handle { font-size: 1.3rem; padding: 6px 10px; top: 4px; right: 6px; }
    .tile { padding: 24px 12px 16px 12px; }
    .card-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .item-card-image { height: 120px; }
    .page-header h1 { font-size: 1.4rem; }
    .detail-actions { flex-direction: column; }
    .detail-actions .btn, .detail-actions form { width: 100%; }
    .detail-actions .btn-danger { width: 100%; }
}