:root {
    /* ── Farb-Palette Dark Mode ── */
    --bg:           #0f1117;
    --bg-surface:   #1a1d27;
    --bg-card:      #22263a;
    --border:       #2e3250;
    --text:         #e8eaf0;
    --text-muted:   #7a7f9a;
    --accent:       #5b6af0;
    --accent-hover: #7b88f8;
    --danger:       #e05252;
    --success:      #4caf7d;
    --shadow:       0 4px 24px rgba(0,0,0,0.45);

    /* Light Mode Overrides – aktiviert via data-theme="light" */
}

[data-theme="light"] {
    --bg:           #f0f2f8;
    --bg-surface:   #ffffff;
    --bg-card:      #f8f9ff;
    --border:       #d0d4e8;
    --text:         #1a1d27;
    --text-muted:   #6b7194;
    --accent:       #4050d0;
    --accent-hover: #2a38b0;
    --shadow:       0 4px 24px rgba(0,0,0,0.12);
}

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

html { font-size: 16px; }

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    transition: background 0.25s, color 0.25s;
    line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* ── Topbar / Nav ── */
.topbar {
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    padding: 0 1.5rem;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.topbar-brand {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.topbar-user {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 1rem;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: background 0.18s, color 0.18s, border-color 0.18s, transform 0.1s;
    text-decoration: none;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
    background: var(--accent);
    color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); color: #fff; }

.btn-ghost {
    background: transparent;
    color: var(--text-muted);
    border-color: var(--border);
}
.btn-ghost:hover { background: var(--bg-card); color: var(--text); }

.btn-danger {
    background: transparent;
    color: var(--danger);
    border-color: transparent;
    font-size: 0.8rem;
}
.btn-danger:hover { background: rgba(224,82,82,0.1); }

/* ── Theme Toggle ── */
#theme-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.35rem 0.55rem;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 1rem;
    transition: background 0.18s;
}
#theme-toggle:hover { background: var(--bg-card); }

/* ── Main Content ── */
.main-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* ── Cards ── */
.card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

/* ── Login Page ── */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.login-box {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2.5rem 2rem;
    width: 100%;
    max-width: 380px;
    box-shadow: var(--shadow);
}

.login-logo {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo h1 {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: -0.03em;
}

.login-logo p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* ── Forms ── */
.form-group { margin-bottom: 1.1rem; }

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input {
    width: 100%;
    padding: 0.6rem 0.85rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 0.95rem;
    transition: border-color 0.18s, box-shadow 0.18s;
    outline: none;
}

.form-group input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(91,106,240,0.2);
}

.form-group input::placeholder { color: var(--text-muted); }

.btn-block { width: 100%; justify-content: center; padding: 0.65rem; }

/* ── Alerts ── */
.alert {
    padding: 0.65rem 0.9rem;
    border-radius: 8px;
    font-size: 0.875rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
}

.alert-danger {
    background: rgba(224,82,82,0.12);
    border-color: rgba(224,82,82,0.3);
    color: #f08080;
}

.alert-warning {
    background: rgba(240,180,60,0.12);
    border-color: rgba(240,180,60,0.3);
    color: #f0c060;
}

/* ── Responsive ── */
@media (max-width: 600px) {
    .topbar { padding: 0 1rem; }
    .main-content { padding: 1rem; }
    .topbar-user { display: none; }
}