:root {
  --bg: #f7f8fc;
  --surface: #ffffff;
  --surface-strong: #eef1fb;
  --text: #1f2937;
  --muted: #64748b;
  --primary: #2f5dff;
  --primary-strong: #1022d7;
  --danger: #ef4444;
  --success: #16a34a;
  --border: rgba(15, 23, 42, 0.08);
  --shadow: 0 20px 50px rgba(15, 23, 42, 0.08);
  font-family: 'Inter', sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: linear-gradient(180deg, #f7f8fc 0%, #ffffff 100%);
  color: var(--text);
}

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

body {
  padding: 24px;
}

.app-shell {
  max-width: 1300px;
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-mark {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, #2f5dff, #6c92ff);
  display: grid;
  place-items: center;
  color: white;
  font-weight: 800;
  font-size: 1.3rem;
}

.brand-logo h1 {
  margin: 0;
  font-size: 1.1rem;
}

.brand-logo p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.page-grid {
  display: grid;
  gap: 24px;
}

.panel {
  background: var(--surface);
  border-radius: 28px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.panel-header h2,
.panel-header h3,
.panel-header h4 {
  margin: 0 0 10px;
}

.panel-header p {
  margin: 0;
  color: var(--muted);
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 20px 0;
}

.tab {
  padding: 14px 18px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

.tab.active {
  background: linear-gradient(135deg, #2f5dff, #6c92ff);
  color: white;
  border-color: transparent;
}

.auth-form {
  display: none;
  gap: 16px;
}

.auth-form.active {
  display: grid;
}

label {
  font-weight: 600;
  margin-top: 16px;
}

input,
select,
textarea {
  width: 100%;
  padding: 14px 16px;
  margin-top: 8px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--surface-strong);
  color: var(--text);
}

textarea {
  resize: vertical;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: 16px;
  padding: 16px 22px;
  background: var(--primary);
  color: white;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(47, 93, 255, 0.2);
}

.button.secondary {
  background: #eef1fb;
  color: var(--text);
}

.button.small {
  padding: 10px 16px;
  font-size: 0.95rem;
}

.status-message {
  margin-top: 14px;
  min-height: 24px;
  color: var(--danger);
}

.line-item input::placeholder,
.line-item select::placeholder {
  color: #6b7280;
  opacity: 1;
}

.line-item input,
.line-item select {
  border-color: #d1d5db;
}

.line-item input:focus,
.line-item select:focus {
  outline: 2px solid rgba(59, 130, 246, 0.25);
}

.hidden {
  display: none !important;
}

.form-grid {
  display: grid;
  gap: 18px;
}

.dashboard-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.mini-text {
  margin: 4px 0 0;
  color: var(--muted);
}

.cards-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.stat-card {
  background: var(--surface-strong);
  border-radius: 22px;
  padding: 24px;
}

.stat-card strong {
  display: block;
  font-size: 2rem;
  color: var(--primary-strong);
}

.documents-list {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

.document-card {
  border-radius: 22px;
  padding: 20px;
  border: 1px solid var(--border);
  display: grid;
  gap: 12px;
}

.document-card h4 {
  margin: 0;
}

.document-card .document-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
}

.document-card .document-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.document-card .badge {
  background: rgba(47, 93, 255, 0.12);
  color: var(--primary-strong);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.9rem;
  width: fit-content;
}

.items-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 22px;
}

.items-container {
  display: grid;
  gap: 16px;
  margin-top: 12px;
}

.line-item {
  display: grid;
  grid-template-columns: 1fr 90px 90px 100px 46px;
  gap: 12px;
  align-items: center;
}

.line-item input,
.line-item select {
  margin-top: 0;
}

.line-item button {
  min-width: 40px;
}

.total-card {
  background: var(--surface-strong);
  border-radius: 20px;
  padding: 20px;
  display: grid;
  gap: 12px;
}

.total-card span {
  color: var(--muted);
}

.total-card strong {
  display: block;
  font-size: 1.2rem;
}

.summary-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 24px;
  margin-top: 22px;
}

.preview-card {
  width: min(100%, 1020px);
  overflow: hidden;
}

.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 18px;
  margin-bottom: 20px;
}

.preview-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.invoice-preview {
  background: var(--surface-strong);
  border-radius: 24px;
  padding: 28px;
}

.invoice-header,
.invoice-summary,
.invoice-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.invoice-header h3,
.invoice-footer p {
  margin: 0;
}

.invoice-details,
.invoice-client {
  width: min(48%, 100%);
}

.invoice-details strong,
.invoice-client strong {
  display: block;
  margin-bottom: 8px;
}

.hero-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: center;
  margin: 36px 0;
}

.landing-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

.landing-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 0;
}

.landing-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.landing-nav .nav-link {
  color: var(--text);
  text-decoration: none;
  padding: 10px 16px;
  border-radius: 14px;
  border: 1px solid rgba(15, 23, 42, 0.08);
}

.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--primary-strong);
  font-weight: 700;
  margin-bottom: 12px;
}

.hero-section h1 {
  font-size: clamp(2.5rem, 4vw, 4rem);
  line-height: 1.05;
  margin: 0;
}

.hero-copy {
  margin-top: 16px;
  color: var(--muted);
  max-width: 560px;
}

.hero-card {
  display: grid;
  gap: 16px;
}

.hero-stat {
  background: var(--surface);
  border-radius: 24px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.features-section,
.pricing-section {
  padding: 40px 0;
}

.section-heading {
  margin-bottom: 28px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-card,
.pricing-card {
  background: var(--surface);
  border-radius: 24px;
  padding: 26px;
  box-shadow: var(--shadow);
}

.feature-card h3,
.pricing-card h3 {
  margin-top: 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.pricing-card strong {
  display: block;
  font-size: 2.4rem;
  margin: 16px 0;
  color: var(--primary-strong);
}

.pricing-card ul {
  padding-left: 20px;
  margin: 16px 0;
  color: var(--muted);
}

.pricing-card li {
  margin-bottom: 10px;
}

.pricing-card.featured {
  border: 2px solid rgba(47, 93, 255, 0.16);
}

.landing-footer {
  text-align: center;
  color: var(--muted);
  padding: 28px 0 0;
}

@media (max-width: 980px) {
  .hero-section,
  .feature-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .landing-shell {
    padding: 16px;
  }

  .landing-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

.invoice-table {
  width: 100%;
  border-collapse: collapse;
  margin: 22px 0;
}

.invoice-table th,
.invoice-table td {
  border: 1px solid rgba(15, 23, 42, 0.06);
  padding: 14px 16px;
  text-align: left;
}

.invoice-table th {
  background: rgba(47, 93, 255, 0.08);
  color: var(--text);
}

.invoice-total {
  display: flex;
  justify-content: flex-end;
  width: 100%;
}

.invoice-total div {
  width: min(320px, 100%);
}

.invoice-total .row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
}

.invoice-total .row strong {
  font-size: 1rem;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  display: grid;
  place-items: center;
  padding: 20px;
  z-index: 30;
}

.modal-card {
  background: var(--surface);
  border-radius: 28px;
  padding: 26px;
  max-height: 95vh;
  overflow-y: auto;
  width: min(980px, 100%);
  position: relative;
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 1.5rem;
  cursor: pointer;
}

@media (max-width: 900px) {
  .dashboard-top,
  .invoice-header,
  .invoice-summary,
  .summary-row {
    flex-direction: column;
  }

  .cards-row {
    grid-template-columns: 1fr;
  }

  .stat-card {
    padding: 20px;
  }

  .line-item {
    grid-template-columns: 1fr;
  }

  .line-item button {
    width: 100%;
  }

  .invoice-details,
  .invoice-client {
    width: 100%;
  }

  .invoice-total {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  body {
    padding: 16px;
  }

  .site-header {
    flex-direction: column;
    align-items: stretch;
  }

  .brand-logo {
    gap: 12px;
  }

  .auth-tabs {
    grid-template-columns: 1fr;
  }

  .preview-actions {
    flex-direction: column;
  }
}

.page-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.page-nav .nav-link {
  color: var(--text);
  text-decoration: none;
  padding: 12px 16px;
  border-radius: 14px;
  border: 1px solid transparent;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.page-nav .nav-link:hover,
.page-nav .nav-link.active {
  background: rgba(47, 93, 255, 0.1);
  border-color: rgba(47, 93, 255, 0.14);
}

.button-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.invoice-logo {
  width: 100px;
  object-fit: contain;
}

.invoice-logo-placeholder {
  width: 100px;
  height: 100px;
  border-radius: 18px;
  background: rgba(47, 93, 255, 0.08);
  display: grid;
  place-items: center;
  color: var(--muted);
}