:root {
  --bg: #f7f4ef;
  --card: #fffdf9;
  --text: #1e2633;
  --muted: #59647a;
  --accent: #0f7f72;
  --accent-soft: #daf4ef;
  --danger: #c9384d;
  --ring: rgba(15, 127, 114, 0.25);
  --border: #d9d8d2;
  --shadow: 0 12px 32px rgba(30, 38, 51, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Manrope", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 15% 10%, #e9f6f2 0%, #f7f4ef 45%),
    radial-gradient(circle at 85% 20%, #ffe9d8 0%, transparent 38%),
    var(--bg);
  min-height: 100vh;
}

.bg-shape {
  position: fixed;
  border-radius: 999px;
  filter: blur(50px);
  z-index: -1;
  opacity: 0.5;
}

.bg-shape-a {
  width: 320px;
  height: 320px;
  background: #9adbcf;
  left: -120px;
  top: 32px;
}

.bg-shape-b {
  width: 280px;
  height: 280px;
  background: #ffc88f;
  right: -90px;
  top: 220px;
}

.app-shell {
  width: min(85vw, 1680px);
  max-width: 1680px;
  margin: 0 auto;
  padding: 28px 16px 44px;
  display: grid;
  gap: 16px;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
  flex-wrap: wrap;
}

.eyebrow {
  margin: 0;
  color: var(--muted);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  font-size: 0.74rem;
  font-weight: 700;
}

h1 {
  margin: 4px 0 0;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.1;
}

h2,
h3 {
  margin: 0;
}

.month-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

#monthTitle {
  min-width: 210px;
  text-align: center;
  font-size: 1.08rem;
}

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 16px;
}

.account-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.account-bar p {
  margin: 0;
  color: var(--muted);
}

.account-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.link-btn {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

.settings-panel {
  display: grid;
  gap: 10px;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
}

.settings-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.sync-row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.sync-status {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  min-height: 1.2em;
}

.sync-status.error {
  color: var(--danger);
}

.sync-status.success {
  color: #1b6d61;
}

.form-panel h3,
.calendar-panel h3,
.list-panel h3 {
  margin-bottom: 12px;
}

.payment-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 10px;
  align-items: end;
}

.payment-form > * {
  min-width: 0;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.9rem;
}

input,
select,
button {
  font: inherit;
}

input,
select {
  border: 1px solid var(--border);
  background: #ffffff;
  border-radius: 10px;
  padding: 9px 10px;
  color: var(--text);
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--ring);
}

button {
  border: none;
  border-radius: 10px;
  padding: 9px 14px;
  font-weight: 700;
  cursor: pointer;
}

.primary-btn {
  background: linear-gradient(135deg, #0f7f72, #0da896);
  color: #ffffff;
}

.ghost-btn {
  background: #ffffff;
  border: 1px solid var(--border);
  color: var(--text);
}

.danger-btn {
  background: #ffe8ea;
  color: var(--danger);
}

.danger-btn-soft {
  background: #fff6f7;
  color: #a32b3f;
  border: 1px solid #f3c8cf;
}

.hidden {
  display: none;
}

.auth-shell {
  min-height: 100vh;
  align-items: center;
}

.auth-panel {
  max-width: 460px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  gap: 10px;
}

.auth-form {
  display: grid;
  gap: 10px;
}

.auth-links {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.auth-links a {
  color: var(--accent);
}

.auth-error {
  margin: 0;
  color: var(--danger);
  font-weight: 700;
}

.auth-success {
  margin: 0;
  color: #1b6d61;
  font-weight: 700;
}

.invite-form {
  display: grid;
  grid-template-columns: repeat(3, minmax(140px, 1fr));
  gap: 10px;
  align-items: end;
}

.invite-list {
  display: grid;
  gap: 8px;
}

.invite-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  background: #ffffff;
}

.invite-item h4,
.invite-item p {
  margin: 0;
}

.invite-item p {
  color: var(--muted);
  font-size: 0.86rem;
  margin-top: 4px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap: 10px;
}

.stat-card {
  background: linear-gradient(160deg, #ffffff, #f9fbfa);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
}

.stat-label {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 700;
}

.stat-value {
  margin: 8px 0 0;
  font-size: 1.26rem;
  font-weight: 800;
}

.calendar {
  display: grid;
  gap: 8px;
}

.calendar-weekdays,
.calendar-days {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 7px;
}

.weekday {
  text-align: center;
  font-size: 0.82rem;
  color: var(--muted);
  font-weight: 700;
  letter-spacing: 0.03em;
}

.day-cell {
  min-height: 105px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px;
  background: #ffffff;
  display: grid;
  gap: 6px;
  align-content: start;
  overflow: hidden;
}

.day-cell.today {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--ring);
}

.day-num {
  font-size: 0.85rem;
  font-weight: 700;
}

.day-payment {
  background: var(--accent-soft);
  color: #15534a;
  border-radius: 8px;
  padding: 4px 6px;
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.25;
  white-space: normal;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.day-payment.missing {
  background: #fff0f2;
  color: #8a2635;
}

.list-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 6px;
}

#listHint {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.payment-list {
  display: grid;
  gap: 9px;
}

.hidden-payments {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.hidden-title {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.hidden-item {
  border: 1px dashed var(--border);
  border-radius: 10px;
  background: #ffffff;
  padding: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.hidden-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.payment-row {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #ffffff;
  padding: 11px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.payment-name {
  margin: 0;
  font-size: 1rem;
}

.payment-meta {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.payment-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.payment-actions button {
  flex: 0 0 auto;
  white-space: nowrap;
}

.amount-wrap {
  min-width: 160px;
  flex: 1 1 170px;
}

.amount-wrap input[readonly] {
  background: #f4f6f8;
}

.paid-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--text);
  margin: 0;
  white-space: nowrap;
  flex: 0 0 auto;
}

.paid-wrap input {
  margin: 0;
  transform: scale(1.15);
}

.empty-state {
  border: 1px dashed var(--border);
  border-radius: 12px;
  padding: 16px;
  color: var(--muted);
  background: #ffffff;
}

@media (max-width: 980px) {
  .app-shell {
    width: 100%;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
  }
}

@media (max-width: 640px) {
  .month-controls {
    width: 100%;
    justify-content: space-between;
  }

  #monthTitle {
    min-width: auto;
    font-size: 0.95rem;
  }

  .payment-form {
    grid-template-columns: 1fr;
  }

  .settings-grid {
    grid-template-columns: 1fr;
  }

  .invite-form {
    grid-template-columns: 1fr;
  }

  .sync-row {
    align-items: start;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .day-cell {
    min-height: 88px;
    padding: 5px;
  }

  .day-payment {
    font-size: 0.62rem;
    padding: 3px 5px;
    line-height: 1.2;
    max-height: 3.4em;
    overflow: hidden;
  }
}