:root {
  --ink: #17231f;
  --muted: #66736e;
  --forest: #185f50;
  --forest-dark: #0d493d;
  --mint: #dfece6;
  --sand: #f1e9dc;
  --canvas: #f5f2ec;
  --paper: #fffefa;
  --line: #d8ddd9;
  --danger: #9c3f34;
  --shadow: 0 18px 50px rgba(35, 45, 41, 0.08);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  color: var(--ink);
  background: var(--canvas);
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  margin: 0;
  background:
    radial-gradient(circle at 76% 3%, rgba(226, 205, 166, 0.26), transparent 29rem),
    var(--canvas);
}

button,
input,
textarea,
select {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(24, 95, 80, 0.3);
  outline-offset: 2px;
}

.topbar {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  padding: 10px 28px;
  border-bottom: 1px solid rgba(23, 35, 31, 0.12);
  background: rgba(255, 254, 250, 0.9);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 12px;
  background: var(--forest);
  color: white;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  box-shadow: 0 8px 18px rgba(24, 95, 80, 0.2);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 20px;
  line-height: 1.05;
}

.brand small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
}

.topbar-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 650;
}

.topbar-account {
  display: flex;
  align-items: center;
  gap: 14px;
}

.account-name,
.account-name small {
  display: block;
}

.account-name {
  text-align: right;
  font-size: 12px;
  font-weight: 750;
}

.account-name small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 600;
}

.logout-button {
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid #bfc9c4;
  border-radius: 9px;
  background: rgba(255, 254, 250, 0.76);
  color: var(--ink);
  cursor: pointer;
  font-size: 11px;
  font-weight: 750;
}

.logout-button:hover {
  background: var(--paper);
}

.local-access-badge {
  padding: 7px 10px;
  border: 1px solid #bfd2c9;
  border-radius: 999px;
  background: var(--mint);
  color: var(--forest-dark);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4c9b6b;
  box-shadow: 0 0 0 4px rgba(76, 155, 107, 0.12);
}

.flash-stack {
  position: fixed;
  z-index: 50;
  top: 84px;
  right: 24px;
  width: min(390px, calc(100vw - 32px));
}

.flash {
  margin-bottom: 8px;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper);
  box-shadow: var(--shadow);
  font-size: 13px;
  font-weight: 650;
}

.flash-success {
  border-color: #a9ccba;
  color: var(--forest-dark);
}

.flash-error {
  border-color: #ddb4ad;
  color: var(--danger);
}

.login-page {
  display: grid;
  min-height: calc(100vh - 72px);
  place-items: center;
  padding: 36px 18px;
}

.login-card {
  width: min(440px, 100%);
  padding: clamp(28px, 6vw, 44px);
  border: 1px solid rgba(23, 35, 31, 0.12);
  border-radius: 22px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.login-card h1 {
  margin: 7px 0 10px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(34px, 8vw, 48px);
  font-weight: 500;
  letter-spacing: -0.035em;
}

.login-card > p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.login-form {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.login-button {
  width: 100%;
  margin-top: 4px;
}

.login-help {
  display: block;
  margin-top: 18px;
  color: var(--muted);
  text-align: center;
}

.workspace {
  display: grid;
  width: min(1780px, 100%);
  margin: 0 auto;
  grid-template-columns: 248px minmax(620px, 1fr) 320px;
  align-items: start;
}

.history-panel {
  position: sticky;
  top: 72px;
  min-height: calc(100vh - 72px);
  padding: 34px 20px 30px 28px;
  border-right: 1px solid rgba(23, 35, 31, 0.1);
}

.history-heading h2,
.card-title h2,
.section-heading h3 {
  margin: 0;
}

.history-heading h2 {
  margin-top: 4px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 24px;
  font-weight: 500;
}

.eyebrow {
  color: var(--forest);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.invoice-list {
  display: grid;
  gap: 7px;
  margin: 22px 0;
}

.invoice-row {
  position: relative;
  display: flex;
  align-items: stretch;
}

.invoice-row .invoice-link {
  flex: 1;
  min-width: 0;
}

.delete-invoice-form {
  position: absolute;
  top: 4px;
  right: 4px;
}

.delete-invoice-button {
  width: 18px;
  height: 18px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: #9aa8a2;
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  transition:
    opacity 160ms ease,
    background 160ms ease,
    color 160ms ease;
}

.invoice-row:hover .delete-invoice-button,
.delete-invoice-button:focus-visible {
  opacity: 1;
}

.delete-invoice-button:hover {
  background: #f3d9d4;
  color: #a04434;
}

.invoice-link {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  padding: 12px;
  border: 1px solid transparent;
  border-radius: 12px;
  color: var(--ink);
  text-decoration: none;
  transition:
    border-color 160ms ease,
    background 160ms ease,
    transform 160ms ease;
}

.invoice-link:hover {
  transform: translateY(-1px);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.6);
}

.invoice-link.paid {
  border-left: 4px solid #3f9d63;
  background: rgba(63, 157, 99, 0.12);
}

.invoice-link.unpaid {
  border-left: 4px solid #c25a4a;
  background: rgba(194, 90, 74, 0.12);
}

.invoice-link.paid.active {
  border-color: #3f9d63;
  background: rgba(63, 157, 99, 0.18);
}

.invoice-link.unpaid.active {
  border-color: #c25a4a;
  background: rgba(194, 90, 74, 0.18);
}

.paid-toggle-control {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 0;
  font-size: 14px;
}

.paid-toggle-control input {
  width: 16px;
  height: 16px;
  accent-color: #3f9d63;
}

.invoice-link.active {
  border-color: #bcd0c7;
  background: var(--paper);
  box-shadow: 0 10px 24px rgba(35, 45, 41, 0.06);
}

.invoice-link strong,
.invoice-link small {
  display: block;
}

.invoice-link strong {
  font-size: 13px;
}

.invoice-link small {
  overflow: hidden;
  max-width: 135px;
  margin-top: 4px;
  color: var(--muted);
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.invoice-link time {
  color: var(--muted);
  font-size: 10px;
}

.history-note {
  margin: 10px 2px 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}

.editor {
  min-width: 0;
  padding: 40px clamp(24px, 3vw, 52px) 80px;
}

.editor-fields {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.viewer-notice {
  margin: -6px 0 18px;
  padding: 11px 14px;
  border: 1px solid #bfd2c9;
  border-radius: 11px;
  background: var(--mint);
  color: var(--forest-dark);
  font-size: 11px;
  font-weight: 700;
}

.readonly-editor :disabled {
  opacity: 1;
}

.readonly-editor input:disabled,
.readonly-editor textarea:disabled {
  border-color: #d8ddd9;
  background: #f7f7f3;
  color: var(--ink);
  cursor: default;
  -webkit-text-fill-color: var(--ink);
}

.readonly-editor summary {
  cursor: pointer;
}

.editor-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.editor-heading h1 {
  margin: 4px 0 8px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(36px, 4vw, 58px);
  font-weight: 500;
  letter-spacing: -0.04em;
}

.editor-heading h1 span {
  color: var(--forest);
}

.editor-heading p {
  max-width: 650px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.editor-actions {
  display: flex;
  flex: 0 0 auto;
  gap: 8px;
}

.primary-button,
.secondary-button,
.add-period-button,
.icon-button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 750;
  text-decoration: none;
  transition:
    transform 150ms ease,
    background 150ms ease,
    box-shadow 150ms ease;
}

.primary-button:hover,
.secondary-button:hover,
.add-period-button:hover {
  transform: translateY(-1px);
}

.primary-button {
  padding: 0 20px;
  border: 1px solid var(--forest);
  background: var(--forest);
  color: white;
  box-shadow: 0 10px 20px rgba(24, 95, 80, 0.17);
}

.primary-button:hover {
  background: var(--forest-dark);
}

.secondary-button {
  padding: 0 16px;
  border: 1px solid #bfc9c4;
  background: rgba(255, 254, 250, 0.76);
  color: var(--ink);
}

.full-width {
  width: 100%;
}

.sheet-card,
.period-card {
  border: 1px solid rgba(23, 35, 31, 0.12);
  border-radius: 18px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.metadata-card {
  margin-bottom: 18px;
  padding: 24px;
}

.heating-meter-card {
  margin-bottom: 18px;
  padding: 24px;
}

.heating-reading-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: start;
  gap: 14px;
}

.reading-display {
  display: grid;
  min-height: 70px;
  align-content: center;
  gap: 5px;
  padding: 10px 12px;
  border: 1px solid #cfd6d2;
  border-radius: 9px;
  background: #f8f8f5;
}

.reading-display span {
  color: #43504b;
  font-size: 11px;
  font-weight: 700;
}

.reading-display strong {
  font-size: 15px;
  font-variant-numeric: tabular-nums;
}

.reading-display small {
  color: var(--muted);
  font-size: 10px;
}

.calculated-reading {
  border-color: #c8d8d0;
  background: rgba(223, 236, 230, 0.48);
}

.calculated-reading strong {
  color: var(--forest-dark);
}

.card-title,
.period-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.card-title {
  margin-bottom: 22px;
}

.card-title h2 {
  margin-top: 4px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 28px;
  font-weight: 500;
}

.saved-badge {
  padding: 6px 10px;
  border: 1px solid #bfd2c9;
  border-radius: 999px;
  background: var(--mint);
  color: var(--forest-dark);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.field-grid {
  display: grid;
  gap: 14px;
}

.field-grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field-grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.field-grid.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.field {
  display: grid;
  min-width: 0;
  gap: 6px;
}

.field-label {
  color: #43504b;
  font-size: 11px;
  font-weight: 700;
}

.field small {
  color: var(--muted);
  font-size: 10px;
  line-height: 1.4;
}

.input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.field input,
.field textarea,
.period-title-input {
  width: 100%;
  border: 1px solid #cfd6d2;
  border-radius: 9px;
  background: #fff;
  color: var(--ink);
  transition:
    border-color 150ms ease,
    box-shadow 150ms ease;
}

.field input {
  height: 42px;
  padding: 0 12px;
}

.field textarea {
  min-height: 66px;
  padding: 10px 12px;
  line-height: 1.5;
  resize: vertical;
}

.field input:hover,
.field textarea:hover,
.period-title-input:hover {
  border-color: #9caaa4;
}

.field input:focus,
.field textarea:focus,
.period-title-input:focus {
  border-color: var(--forest);
  box-shadow: 0 0 0 3px rgba(24, 95, 80, 0.1);
  outline: none;
}

.field input[aria-invalid="true"] {
  border-color: var(--danger);
  background: #fff8f6;
}

.input-wrap input:has(+ .suffix) {
  padding-right: 72px;
}

.suffix {
  position: absolute;
  right: 11px;
  max-width: 66px;
  overflow: hidden;
  color: var(--muted);
  font-size: 10px;
  font-weight: 650;
  pointer-events: none;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.notes-panel {
  margin-top: 18px;
  border-top: 1px solid var(--line);
}

.notes-panel summary {
  padding: 16px 0 2px;
  cursor: pointer;
  color: var(--forest);
  font-size: 12px;
  font-weight: 750;
}

.notes-grid {
  padding-top: 14px;
}

.sender-panel {
  margin-top: 22px;
}

.period-card {
  margin-bottom: 18px;
  overflow: hidden;
}

.period-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(110deg, rgba(223, 236, 230, 0.85), rgba(255, 254, 250, 0.8));
}

.period-title-input {
  max-width: 520px;
  margin-top: 4px;
  padding: 0;
  border-color: transparent;
  border-radius: 5px;
  background: transparent;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 25px;
  font-weight: 500;
}

.icon-button {
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--danger);
}

.icon-button:hover {
  border-color: #e5c5bf;
  background: #fff7f5;
}

.period-section {
  padding: 22px 24px;
  border-bottom: 1px solid var(--line);
}

.meter-results {
  display: grid;
  margin-top: 16px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  overflow: hidden;
  border: 1px solid #c8d8d0;
  border-radius: 11px;
  background: rgba(223, 236, 230, 0.48);
}

.meter-results div {
  display: grid;
  gap: 3px;
  padding: 11px 13px;
  border-right: 1px solid #c8d8d0;
}

.meter-results div:last-child {
  border-right: 0;
}

.meter-results span {
  color: var(--muted);
  font-size: 10px;
}

.meter-results strong {
  color: var(--forest-dark);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.consumption-rest {
  margin-top: 16px;
}

.section-heading {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  margin-bottom: 17px;
}

.section-heading h3 {
  font-size: 14px;
}

.section-heading p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.tariff-source-link {
  display: inline-flex;
  margin-top: 7px;
  color: var(--forest);
  font-size: 11px;
  font-weight: 700;
  text-underline-offset: 2px;
}

.tariff-source-link:hover {
  color: var(--forest-dark);
}

.step-number {
  display: grid;
  width: 27px;
  height: 27px;
  flex: 0 0 27px;
  place-items: center;
  border-radius: 8px;
  background: var(--sand);
  color: #806847;
  font-size: 9px;
  font-weight: 850;
}

.period-card > .notes-panel {
  margin: 0;
  padding: 0 24px 22px;
  border-top: 0;
}

.add-period-button {
  width: 100%;
  min-height: 54px;
  gap: 9px;
  border: 1px dashed #9fafa7;
  background: rgba(255, 254, 250, 0.55);
  color: var(--forest);
}

.add-period-button span {
  display: grid;
  width: 23px;
  height: 23px;
  place-items: center;
  border-radius: 7px;
  background: var(--mint);
  font-size: 18px;
}

.summary-panel {
  position: relative;
  min-height: calc(100vh - 72px);
  padding: 40px 28px 40px 20px;
  border-left: 1px solid rgba(23, 35, 31, 0.1);
}

.summary-sticky {
  position: sticky;
  top: 102px;
}

.grand-total {
  margin: 9px 0 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.grand-total span,
.grand-total strong {
  display: block;
}

.grand-total span {
  color: var(--muted);
  font-size: 11px;
}

.grand-total strong {
  margin-top: 3px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 38px;
  font-weight: 500;
  letter-spacing: -0.035em;
}

.live-period {
  margin-bottom: 15px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.live-period header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
  color: var(--forest-dark);
  font-size: 11px;
}

.live-period dl {
  display: grid;
  gap: 5px;
  margin: 0;
}

.live-period dl div,
.summary-totals div {
  display: flex;
  justify-content: space-between;
  gap: 14px;
}

.live-period dt,
.live-period dd {
  margin: 0;
  font-size: 10px;
}

.live-period dt {
  color: var(--muted);
}

.live-period dd {
  flex: 0 0 auto;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

.summary-totals {
  display: grid;
  gap: 7px;
  font-size: 11px;
}

.summary-totals span {
  color: var(--muted);
}

.formula-note {
  margin-top: 20px;
  padding: 14px;
  border: 1px solid #d8d1c4;
  border-radius: 12px;
  background: rgba(241, 233, 220, 0.62);
}

.formula-note strong {
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.formula-note p {
  margin: 7px 0 0;
  color: #645a4b;
  font-size: 10px;
  line-height: 1.45;
}

.mobile-save-bar {
  display: none;
}

@media (max-width: 1280px) {
  .workspace {
    grid-template-columns: 210px minmax(580px, 1fr) 280px;
  }

  .field-grid.four {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .history-panel {
    padding-left: 18px;
  }

  .summary-panel {
    padding-right: 18px;
  }
}

@media (max-width: 1020px) {
  .workspace {
    grid-template-columns: 190px minmax(0, 1fr);
  }

  .summary-panel {
    display: none;
  }

  .editor {
    padding-right: 28px;
    padding-left: 28px;
  }
}

@media (max-width: 760px) {
  .topbar {
    padding: 9px 16px;
  }

  .topbar-status {
    display: none;
  }

  .account-name {
    display: none;
  }

  .topbar-account {
    gap: 0;
  }

  .workspace {
    display: block;
  }

  .history-panel {
    position: static;
    min-height: 0;
    padding: 20px 16px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .history-heading,
  .history-note {
    display: none;
  }

  .invoice-list {
    display: flex;
    margin: 0 0 10px;
    overflow-x: auto;
  }

  .invoice-link {
    min-width: 190px;
    background: rgba(255, 255, 255, 0.5);
  }

  .editor {
    padding: 28px 14px 96px;
  }

  .editor-heading {
    display: block;
  }

  .editor-heading h1 {
    font-size: 42px;
  }

  .editor-actions {
    display: none;
  }

  .metadata-card,
  .heating-meter-card,
  .period-header,
  .period-section {
    padding: 18px;
  }

  .period-card > .notes-panel {
    padding-right: 18px;
    padding-left: 18px;
  }

  .field-grid.two,
  .field-grid.three,
  .field-grid.four {
    grid-template-columns: 1fr;
  }

  .heating-reading-grid {
    grid-template-columns: 1fr;
  }

  .meter-results {
    grid-template-columns: 1fr;
  }

  .meter-results div {
    border-right: 0;
    border-bottom: 1px solid #c8d8d0;
  }

  .meter-results div:last-child {
    border-bottom: 0;
  }

  .period-header {
    align-items: flex-start;
  }

  .period-title-input {
    font-size: 21px;
  }

  .mobile-save-bar {
    position: fixed;
    z-index: 30;
    right: 0;
    bottom: 0;
    left: 0;
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 10px 14px;
    border-top: 1px solid var(--line);
    background: rgba(255, 254, 250, 0.94);
    backdrop-filter: blur(12px);
  }
}