/* Nüchtern und hell, mit dunkler Fassung für Systeme, die danach fragen.
   Keine Schriftart wird nachgeladen: der Server ist nicht am Netz erreichbar,
   wenn der Kunde ohne Internet arbeitet, und eine Rechnung soll trotzdem
   ordentlich aussehen. */

:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --ink: #16191d;
  --muted: #666e78;
  --line: #dcdfe4;
  --accent: #2f6fb5;
  --accent-ink: #ffffff;
  --ok: #1e7a44;
  --ok-bg: #e7f5ec;
  --bad: #b3261e;
  --bad-bg: #fdecea;
  --warn: #8a5a00;
  --warn-bg: #fdf4e3;
  --radius: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16191d;
    --panel: #1e2227;
    --ink: #e8eaed;
    --muted: #9aa3ad;
    --line: #313640;
    --accent: #6ea8e0;
    --accent-ink: #10141a;
    --ok: #6cc08b;
    --ok-bg: #17301f;
    --bad: #f2938c;
    --bad-bg: #331b1a;
    --warn: #e0b356;
    --warn-bg: #2f2716;
  }
}

* {
  box-sizing: border-box;
}

/* Muss vor allen display-Regeln stehen und sie schlagen: das hidden-Attribut
   bringt nur ein display:none aus dem Browser-Stylesheet mit, und jede eigene
   display-Angabe (etwa .login) gewinnt sonst dagegen — die Anmeldemaske stünde
   dann hinter der angemeldeten Oberfläche. */
[hidden] {
  display: none !important;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

h1 {
  font-size: 22px;
  margin: 0 0 4px;
}
h2 {
  font-size: 17px;
  margin: 28px 0 12px;
}
h3 {
  font-size: 15px;
  margin: 20px 0 8px;
}

.muted {
  color: var(--muted);
}
.error {
  color: var(--bad);
  background: var(--bad-bg);
  border: 1px solid color-mix(in srgb, var(--bad) 35%, transparent);
  border-radius: var(--radius);
  padding: 10px 12px;
  margin: 12px 0;
}
code {
  font: 12px/1.4 ui-monospace, Menlo, Consolas, monospace;
  background: color-mix(in srgb, var(--ink) 8%, transparent);
  padding: 1px 5px;
  border-radius: 4px;
}

/* --- Bedienelemente ------------------------------------------------------ */

button {
  font: inherit;
  cursor: pointer;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  padding: 8px 14px;
}
button:hover:not(:disabled) {
  border-color: var(--accent);
}
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
}
button.danger {
  background: var(--bad);
  border-color: var(--bad);
  /* Nicht fest weiß: in der dunklen Fassung ist --bad ein helles Rot, auf dem
     weiße Schrift kaum zu lesen wäre. --accent-ink dreht sich mit. */
  color: var(--accent-ink);
  font-weight: 600;
}
button.link {
  background: none;
  border: none;
  color: var(--accent);
  padding: 6px 2px;
  text-decoration: underline;
  text-underline-offset: 3px;
}

input,
textarea {
  font: inherit;
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--ink);
}
input:focus,
textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}
textarea {
  resize: vertical;
  font-family: inherit;
  line-height: 1.6;
}
label {
  display: block;
  margin: 14px 0 5px;
  font-weight: 600;
  font-size: 13px;
}

.row {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 16px;
}

/* --- Anmeldung ----------------------------------------------------------- */

.login {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.login-card {
  width: 100%;
  max-width: 380px;
}
.login-card button {
  width: 100%;
  margin-top: 20px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}

/* --- Rahmen -------------------------------------------------------------- */

.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 10px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  color: var(--accent);
}
.topbar nav {
  display: flex;
  gap: 4px;
}
.tab {
  border-color: transparent;
  background: none;
  color: var(--muted);
}
.tab[aria-current="true"] {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
  font-weight: 600;
}
.topbar-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 14px;
}

.banner {
  margin: 0;
  padding: 10px 24px;
  background: var(--warn-bg);
  color: var(--warn);
  border-bottom: 1px solid color-mix(in srgb, var(--warn) 30%, transparent);
  font-size: 14px;
}

.view {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px;
}
.back {
  margin-bottom: 8px;
}

/* --- Ablage -------------------------------------------------------------- */

.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 38px 20px;
  border: 2px dashed var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  text-align: center;
  cursor: pointer;
}
.dropzone:hover,
.dropzone:focus,
.dropzone.over {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 6%, var(--panel));
}

/* --- Liste --------------------------------------------------------------- */

.list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 16px;
  align-items: center;
  padding: 12px 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  text-align: left;
  width: 100%;
}
.item:hover {
  border-color: var(--accent);
}
.item-main {
  font-weight: 600;
}
.item-sub {
  grid-column: 1;
  font-size: 13px;
  color: var(--muted);
}
.item-right {
  grid-row: 1 / span 2;
  grid-column: 2;
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 5px;
}
.amount {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}
.badge.ok {
  background: var(--ok-bg);
  color: var(--ok);
}
.badge.bad {
  background: var(--bad-bg);
  color: var(--bad);
}
.badge.warn {
  background: var(--warn-bg);
  color: var(--warn);
}
.badge.neutral {
  background: color-mix(in srgb, var(--ink) 8%, transparent);
  color: var(--muted);
}

/* --- Einzelansicht ------------------------------------------------------- */

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 16px;
}
.headline {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}
.headline h2 {
  margin: 0;
  font-size: 20px;
}
.facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px 24px;
  margin-top: 16px;
}
.fact-label {
  font-size: 12px;
  color: var(--muted);
}
.fact-value {
  font-weight: 600;
}

table.items {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
table.items th {
  text-align: left;
  font-size: 12px;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  padding: 6px 8px;
}
table.items td {
  padding: 6px 8px;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 55%, transparent);
  vertical-align: top;
}
table.items td.num,
table.items th.num {
  text-align: right;
  white-space: nowrap;
}
table.items tr.flagged td {
  background: var(--bad-bg);
}
.table-scroll {
  overflow-x: auto;
}

.totals {
  margin-top: 14px;
  margin-left: auto;
  width: max-content;
  min-width: 260px;
  font-variant-numeric: tabular-nums;
}
.totals div {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  padding: 3px 0;
}
.totals div.grand {
  border-top: 1px solid var(--line);
  margin-top: 6px;
  padding-top: 8px;
  font-weight: 700;
  font-size: 16px;
}

.problems {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
}
.problems li {
  padding: 8px 12px;
  border-radius: 6px;
  margin-bottom: 6px;
  font-size: 14px;
}
.problems li.error {
  background: var(--bad-bg);
  color: var(--bad);
  border: none;
}
.problems li.warn {
  background: var(--warn-bg);
  color: var(--warn);
}
.problems li .suggestion {
  display: block;
  opacity: 0.85;
  font-size: 13px;
}

.pages {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 6px;
}
.pages a {
  flex: none;
}
.pages img {
  height: 260px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fff;
  display: block;
}

.attachment {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: color-mix(in srgb, var(--accent) 5%, transparent);
  flex-wrap: wrap;
}

.mail-preview {
  white-space: pre-wrap;
  font: 13px/1.6 ui-monospace, Menlo, Consolas, monospace;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px;
  max-height: 320px;
  overflow: auto;
}

.confirm {
  border: 1px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border-radius: var(--radius);
  padding: 16px;
  margin-top: 16px;
}

.history {
  font-size: 13px;
  border-collapse: collapse;
  width: 100%;
}
.history td {
  padding: 5px 10px 5px 0;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 55%, transparent);
  vertical-align: top;
}

.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid color-mix(in srgb, var(--accent) 30%, transparent);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  vertical-align: -2px;
  margin-right: 8px;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
@media (prefers-reduced-motion: reduce) {
  .spinner {
    animation-duration: 2.4s;
  }
}