:root {
  --red: #c41e2a;
  --red-dark: #9e1721;
  --ink: #0f1419;
  --ink-soft: #5a6578;
  --paper: #f4f2ef;
  --white: #ffffff;
  --border: #e2ddd6;
  --success: #1a7f4b;
  --font-body: "DM Sans", system-ui, sans-serif;
  --font-display: "Outfit", system-ui, sans-serif;
  --sidebar-w: 240px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.5;
}

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

.hidden {
  display: none !important;
}

/* Login */
.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.login-card {
  width: min(400px, 100%);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 20px 50px rgba(15, 20, 25, 0.08);
}

.login-card h1 {
  font-family: var(--font-display);
  margin: 0 0 0.25rem;
  font-size: 1.5rem;
}

.login-card p {
  margin: 0 0 1.5rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.login-card label {
  display: block;
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
}

.login-card input {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
  margin-bottom: 1rem;
}

.login-error {
  color: var(--red);
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
}

/* Layout */
.admin-shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
}

.admin-sidebar {
  background: var(--ink);
  color: var(--white);
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.admin-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  padding: 0 0.5rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  margin-bottom: 0.5rem;
}

.admin-brand span {
  display: block;
  font-size: 0.7rem;
  font-weight: 500;
  opacity: 0.65;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.admin-nav button,
.admin-nav a {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.65rem 0.75rem;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: rgba(255, 255, 255, 0.85);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
}

.admin-nav button:hover,
.admin-nav a:hover,
.admin-nav button.active {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
}

.admin-sidebar-footer {
  margin-top: auto;
  padding-top: 1rem;
}

.admin-main {
  padding: 1.5rem 2rem 2rem;
  overflow-x: auto;
}

.admin-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.admin-header h1 {
  font-family: var(--font-display);
  margin: 0;
  font-size: 1.65rem;
  letter-spacing: -0.02em;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.6rem 1.1rem;
  border-radius: 8px;
  font: inherit;
  font-weight: 600;
  font-size: 0.875rem;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background: var(--red);
  color: var(--white);
}

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

.btn-ghost {
  background: var(--white);
  border-color: var(--border);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--ink-soft);
}

.btn-danger {
  background: #fff5f5;
  border-color: #f5c2c7;
  color: #9e1721;
}

.btn-sm {
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
}

.stat-card strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.75rem;
  letter-spacing: -0.02em;
}

.stat-card span {
  color: var(--ink-soft);
  font-size: 0.85rem;
}

/* Table */
.panel {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.panel-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  align-items: center;
}

.panel-toolbar input,
.panel-toolbar select {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
}

.doc-table {
  width: 100%;
  border-collapse: collapse;
}

.doc-table th,
.doc-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.doc-table th {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  background: #faf9f7;
}

.doc-table tr:last-child td {
  border-bottom: 0;
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: capitalize;
}

.badge-invoice {
  background: #fde8ea;
  color: var(--red-dark);
}

.badge-quotation {
  background: #e8f0fd;
  color: #1a4d8f;
}

.badge-draft {
  background: #f0f0f0;
  color: #555;
}

.badge-sent {
  background: #fff4e0;
  color: #8a5a00;
}

.badge-paid,
.badge-accepted {
  background: #e6f6ed;
  color: var(--success);
}

/* Form */
.form-grid {
  display: grid;
  gap: 1.25rem;
}

.form-section {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
}

.form-section h2 {
  font-family: var(--font-display);
  font-size: 1rem;
  margin: 0 0 1rem;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.form-field label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
}

.form-field textarea {
  min-height: 80px;
  resize: vertical;
}

.line-items-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 0.75rem;
}

.line-items-table th,
.line-items-table td {
  padding: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.line-items-table input {
  width: 100%;
  padding: 0.45rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font: inherit;
}

.line-items-table .col-desc {
  min-width: 200px;
}

.line-items-table .col-num {
  width: 90px;
}

.totals-box {
  margin-left: auto;
  width: min(320px, 100%);
}

.totals-box dl {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.35rem 1rem;
}

.totals-box dt {
  color: var(--ink-soft);
}

.totals-box dd {
  margin: 0;
  font-weight: 600;
  text-align: right;
}

.totals-box .total-row dd {
  font-size: 1.2rem;
  color: var(--red);
}

.list-count {
  margin: 0;
  padding: 0.85rem 1rem 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink-soft);
  text-align: right;
}

.empty-state {
  padding: 2rem;
  text-align: center;
  color: var(--ink-soft);
}

.customer-form-panel {
  margin-bottom: 1rem;
  padding: 1.25rem;
}

.customer-form-panel h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.client-picker-field select {
  width: 100%;
  max-width: 28rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
  background: var(--white);
}

.client-picker-field {
  margin-bottom: 1rem;
}

.field-hint {
  margin: 0.35rem 0 0;
  font-size: 0.8rem;
  color: var(--ink-soft);
}

@media (max-width: 768px) {
  .admin-shell {
    grid-template-columns: 1fr;
  }

  .admin-sidebar {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
  }

  .admin-sidebar-footer {
    margin-top: 0;
    margin-left: auto;
  }

  .admin-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
  }

  .admin-nav button {
    width: auto;
  }
}