:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --ink: #172033;
  --muted: #667085;
  --line: #d9e0ea;
  --brand: #0f766e;
  --brand-dark: #115e59;
  --accent: #c2410c;
  --soft: #e7f5f2;
  --warn: #fff1d6;
  --danger: #b42318;
  --shadow: 0 18px 45px rgba(15, 23, 42, 0.09);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
}

[hidden] {
  display: none !important;
}

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

button {
  cursor: pointer;
}

.login-screen {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 20px;
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.12), rgba(194, 65, 12, 0.08)),
    var(--bg);
}

.login-card {
  display: grid;
  width: min(420px, 100%);
  gap: 16px;
  padding: 26px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.login-card h1 {
  margin-bottom: 8px;
}

.login-error {
  display: none;
  margin: 0;
  color: var(--danger);
  font-size: 14px;
  font-weight: 700;
}

.login-error.show {
  display: block;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px clamp(16px, 4vw, 40px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--brand);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1;
}

h2 {
  margin-bottom: 0;
  font-size: 18px;
}

.topbar-actions,
.panel-title,
.tools-row,
.preview-strip,
.loan-card-header,
.loan-card-footer,
.payment-row {
  display: flex;
  align-items: center;
}

.topbar-actions,
.panel-title,
.tools-row,
.loan-card-header,
.loan-card-footer {
  justify-content: space-between;
}

.topbar-actions {
  gap: 8px;
}

.icon-btn,
.ghost-btn,
.primary-btn,
.mini-btn,
.danger-btn {
  min-height: 42px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 700;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  padding: 0 12px;
  background: var(--ink);
  color: #fff;
  font-size: 12px;
}

.file-btn input {
  display: none;
}

.app-shell {
  width: min(1520px, 100%);
  margin: 0 auto;
  padding: 20px clamp(12px, 3vw, 32px) 40px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.metric,
.panel,
.loan-card,
.empty-state,
.reminder-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.metric {
  padding: 16px;
}

.metric span,
.preview-strip span,
.loan-meta span,
.payment-row span,
.calc-result span,
.reminder-card span,
label {
  color: var(--muted);
  font-size: 13px;
}

.metric strong {
  display: block;
  margin-top: 8px;
  font-size: clamp(18px, 2.5vw, 28px);
  line-height: 1.1;
}

.reminder-panel {
  display: grid;
  gap: 14px;
  margin-bottom: 18px;
  padding: 18px;
}

.reminder-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.reminder-card {
  display: grid;
  gap: 5px;
  min-height: 108px;
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
}

.reminder-card strong {
  overflow-wrap: anywhere;
}

.reminder-card.overdue {
  border-color: #fed7aa;
  background: #fff7ed;
}

.reminder-card.today {
  border-color: #99f6e4;
  background: #f0fdfa;
}

.reminder-card.empty {
  align-content: center;
  color: var(--muted);
  text-align: center;
}

.workspace {
  display: grid;
  grid-template-columns: 370px minmax(0, 1fr) 300px;
  gap: 16px;
  align-items: start;
}

.panel,
.empty-state {
  padding: 18px;
}

.form-panel,
.calculator-panel {
  position: sticky;
  top: 94px;
}

.loan-form,
.modal-form,
.interest-calc {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

label {
  display: grid;
  gap: 6px;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  padding: 10px 12px;
  outline: none;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.preview-strip {
  gap: 10px;
}

.preview-strip div,
.calc-result div {
  flex: 1;
  padding: 12px;
  background: var(--soft);
  border-radius: 8px;
}

.preview-strip strong,
.calc-result strong {
  display: block;
  margin-top: 5px;
  font-size: 17px;
  overflow-wrap: anywhere;
}

.calc-result {
  display: grid;
  gap: 8px;
}

.primary-btn {
  width: 100%;
  background: var(--brand);
  color: #fff;
}

.primary-btn:hover {
  background: var(--brand-dark);
}

.ghost-btn,
.mini-btn {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
  padding: 0 12px;
}

.danger-btn {
  background: #fff;
  border-color: #fecaca;
  color: var(--danger);
  padding: 0 12px;
}

.main-panel {
  display: grid;
  gap: 12px;
}

.tools-row {
  gap: 10px;
}

.search-box {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  padding-left: 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.search-box span {
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
}

.search-box input {
  border: 0;
  box-shadow: none;
}

.tools-row select {
  max-width: 150px;
}

.loan-list {
  display: grid;
  gap: 12px;
}

.loan-card {
  overflow: hidden;
}

.loan-card-header,
.loan-card-body,
.loan-card-footer {
  padding: 14px 16px;
}

.loan-card-header {
  gap: 10px;
  border-bottom: 1px solid var(--line);
}

.customer-name {
  margin: 0 0 5px;
  font-size: 18px;
}

.status {
  flex: 0 0 auto;
  padding: 7px 10px;
  border-radius: 999px;
  background: var(--soft);
  color: var(--brand-dark);
  font-size: 12px;
  font-weight: 700;
}

.status.late {
  background: var(--warn);
  color: #9a3412;
}

.status.paid {
  background: #e8f7eb;
  color: #166534;
}

.loan-meta {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
}

.loan-meta strong {
  display: block;
  margin-top: 4px;
  overflow-wrap: anywhere;
}

.schedule-note {
  display: grid;
  gap: 4px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.schedule-note strong {
  color: var(--ink);
}

.progress-track {
  height: 10px;
  margin-top: 14px;
  overflow: hidden;
  background: #edf1f7;
  border-radius: 999px;
}

.progress-bar {
  height: 100%;
  width: 0;
  background: var(--brand);
}

.note {
  margin: 14px 0 0;
  color: var(--muted);
}

.loan-card-footer {
  gap: 8px;
  background: #fbfcfe;
  border-top: 1px solid var(--line);
  flex-wrap: wrap;
}

.payment-history {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.payment-row {
  justify-content: space-between;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.empty-state {
  display: none;
  text-align: center;
  padding: 52px 18px;
}

.empty-state p {
  margin-bottom: 0;
  color: var(--muted);
}

.calculator-panel h2 + h2 {
  margin-top: 22px;
}

.calc-display {
  min-height: 58px;
  margin: 16px 0 10px;
  padding: 14px;
  overflow: hidden;
  background: var(--ink);
  border-radius: 8px;
  color: #fff;
  font-size: 24px;
  font-weight: 700;
  text-align: right;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.calc-grid button {
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font-weight: 700;
}

.calc-clear {
  grid-column: 1 / -1;
  color: var(--danger) !important;
}

dialog {
  width: min(460px, calc(100% - 24px));
  border: 0;
  border-radius: 8px;
  padding: 0;
  box-shadow: var(--shadow);
}

dialog::backdrop {
  background: rgba(15, 23, 42, 0.45);
}

.modal-form {
  padding: 18px;
}

@media (max-width: 1240px) {
  .workspace {
    grid-template-columns: 350px minmax(0, 1fr);
  }

  .calculator-panel {
    position: static;
    grid-column: 1 / -1;
  }
}

@media (max-width: 900px) {
  .topbar {
    position: static;
  }

  .summary-grid,
  .workspace,
  .reminder-grid,
  .loan-meta {
    grid-template-columns: 1fr;
  }

  .form-panel {
    position: static;
  }

  .tools-row {
    align-items: stretch;
    flex-direction: column;
  }

  .tools-row select {
    max-width: none;
  }

  .loan-card-header,
  .loan-card-footer,
  .payment-row {
    align-items: stretch;
    flex-direction: column;
  }

  .loan-card-footer button {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .topbar-actions {
    width: 100%;
  }

  .icon-btn {
    flex: 1;
  }

  .form-row,
  .preview-strip {
    grid-template-columns: 1fr;
    display: grid;
  }
}