:root {
    --ink: #16233a;
    --ink-soft: #52607a;
    --paper: #f6f7fb;
    --card: #ffffff;
    --line: #e1e5ee;
    --brand: #1f4e78;
    --brand-dark: #16385a;
    --accent: #c67c3a;
    --good: #1f7a4d;
    --bad: #b3402c;
    --radius: 10px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--paper);
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
}

h1 { font-size: 1.35rem; margin: 0; }
h2 { font-size: 1.05rem; margin: 0 0 12px; color: var(--brand-dark); }

a { color: var(--brand); }

.muted { color: var(--ink-soft); font-weight: 400; font-size: 0.85em; }

/* ---------- Topbar ---------- */
.topbar {
    background: var(--brand);
    color: #fff;
    padding: 14px 18px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    justify-content: space-between;
}
.topbar h1 { color: #fff; }
.topbar-right {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    flex-wrap: wrap;
}
.back-link {
    color: #cfe0f0;
    text-decoration: none;
    font-size: 0.85rem;
    display: block;
    margin-bottom: 2px;
}

.btn, button {
    font-family: inherit;
    font-size: 0.9rem;
    border: none;
    border-radius: 8px;
    padding: 8px 14px;
    cursor: pointer;
    background: var(--brand);
    color: #fff;
    transition: background .15s ease;
}
button:hover { background: var(--brand-dark); }
.btn-secondary {
    background: rgba(255,255,255,0.15);
    color: #fff;
    text-decoration: none;
}
.btn-secondary:hover { background: rgba(255,255,255,0.28); }

/* ---------- Layout ---------- */
.container {
    max-width: 90vw;
    margin: 0 auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 16px;
}

/* ---------- KPI Kacheln ---------- */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
}
.kpi-tile {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.kpi-label { font-size: 0.78rem; color: var(--ink-soft); }
.kpi-value { font-size: 1.3rem; font-weight: 600; }
.kpi-highlight {
    background: #fff6ec;
    border-color: var(--accent);
}
.kpi-highlight .kpi-value { color: var(--accent); }

/* ---------- Szenario-Umschalter ---------- */
.scenario-switch { display: flex; gap: 8px; flex-wrap: wrap; }
.scenario-btn {
    background: #eef1f7;
    color: var(--ink);
}
.scenario-btn.active {
    background: var(--brand);
    color: #fff;
}

/* ---------- Tabellen ---------- */
.table-scroll { overflow-x: auto; }
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
.data-table th {
    text-align: left;
    font-size: 0.78rem;
    color: var(--ink-soft);
    border-bottom: 2px solid var(--line);
    padding: 6px 8px;
    white-space: nowrap;
}
.data-table td {
    border-bottom: 1px solid var(--line);
    padding: 4px 6px;
}
.data-table input[type="text"],
.data-table input[type="number"] {
    width: 100%;
    min-width: 70px;
    border: 1px solid transparent;
    background: transparent;
    padding: 6px;
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.9rem;
}
.data-table input:hover,
.data-table input:focus {
    border-color: var(--line);
    background: var(--paper);
    outline: none;
}

.btn-icon {
    background: none;
    color: var(--bad);
    font-size: 1.1rem;
    padding: 2px 8px;
    line-height: 1;
}
.btn-icon:hover { background: #fbe9e6; }

.computed-cell {
    color: var(--ink-soft);
    font-style: italic;
    white-space: nowrap;
}

/* ---------- Formulare ---------- */
.inline-form {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 12px;
}
.inline-form input {
    flex: 1;
    min-width: 120px;
    padding: 8px 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.9rem;
}
.produkt-form { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.form-row { display: flex; gap: 8px; flex-wrap: wrap; }
.form-row input {
    flex: 1;
    min-width: 110px;
    padding: 8px 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.9rem;
}
.form-row-prices input { flex-basis: 100px; }
.form-row-prices button { flex: 0 0 auto; }

/* ---------- Liste Kalkulationen ---------- */
.kalk-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.kalk-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 12px 14px;
    text-decoration: none;
    color: var(--ink);
}
.kalk-link:hover { border-color: var(--brand); }
.kalk-name { font-weight: 600; }
.kalk-meta { font-size: 0.78rem; color: var(--ink-soft); }

/* ---------- Login ---------- */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(160deg, var(--brand) 0%, var(--brand-dark) 100%);
}
.login-box {
    background: #fff;
    border-radius: 14px;
    padding: 32px 28px;
    width: min(360px, 90vw);
    box-shadow: 0 20px 50px rgba(0,0,0,0.25);
}
.login-box h1 { color: var(--brand-dark); font-size: 1.3rem; }
.subtitle { color: var(--ink-soft); margin-top: 4px; font-size: 0.9rem; }
.login-form { display: flex; flex-direction: column; gap: 14px; margin-top: 18px; }
.login-form label { display: flex; flex-direction: column; gap: 6px; font-size: 0.85rem; color: var(--ink-soft); }
.login-form input {
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
}
.login-form button { margin-top: 4px; padding: 10px; font-size: 1rem; }

.alert { padding: 10px 12px; border-radius: 8px; font-size: 0.85rem; }
.alert-error { background: #fdecea; color: var(--bad); border: 1px solid #f3c6bf; }
.alert-warning {
    background: #fff6ec;
    color: #7a4a12;
    border: 1px solid var(--accent);
    padding: 12px 14px;
}
.alert-warning ul { margin: 6px 0 0; padding-left: 20px; }
.alert-warning li { margin-bottom: 4px; }

/* ---------- Mobil ---------- */
@media (max-width: 640px) {
    .topbar { flex-direction: column; align-items: flex-start; }
    h1 { font-size: 1.15rem; }
    .kpi-grid { grid-template-columns: repeat(2, 1fr); }
}