:root {
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-soft: #eef2ff;
  --text: #111827;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --bg: #ffffff;
  --bg-subtle: #f9fafb;
  --danger: #b91c1c;
  --danger-soft: #fef2f2;
  --success: #15803d;
  --success-soft: #f0fdf4;
  --warning: #92400e;
  --warning-soft: #fffbeb;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(17, 24, 39, 0.08), 0 1px 2px rgba(17, 24, 39, 0.04);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

img {
  max-width: 100%;
}

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

/* Header */

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header .inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--accent);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.site-nav a,
.site-nav button {
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--text-muted);
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

.site-nav a:hover,
.site-nav button:hover {
  background: var(--bg-subtle);
  color: var(--text);
}

.site-nav a.nav-cta {
  background: var(--accent);
  color: #fff;
  font-weight: 500;
}

.site-nav a.nav-cta:hover {
  background: var(--accent-hover);
}

/* Layout */

.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
  width: 100%;
}

.container.narrow {
  max-width: 560px;
}

.page-title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.35rem;
}

.page-subtitle {
  color: var(--text-muted);
  margin-bottom: 2rem;
}

/* Hero */

.hero {
  text-align: center;
  padding: 3.5rem 1.25rem 2.5rem;
}

.hero h1 {
  font-size: clamp(1.9rem, 5vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  max-width: 640px;
  margin: 0 auto 1rem;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 520px;
  margin: 0 auto;
}

/* Cards and panels */

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow);
}

.card + .card {
  margin-top: 1.5rem;
}

/* Forms */

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .form-grid {
    grid-template-columns: 1fr 1fr;
  }

  .form-grid .full {
    grid-column: 1 / -1;
  }
}

.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  background: var(--bg);
  color: var(--text);
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

.hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

details.more-details {
  margin-top: 0.25rem;
}

details.more-details summary {
  cursor: pointer;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.25rem 0;
  list-style: none;
}

details.more-details summary::-webkit-details-marker {
  display: none;
}

details.more-details summary::before {
  content: "+ ";
}

details.more-details[open] summary::before {
  content: "- ";
}

details.more-details .form-grid {
  margin-top: 1rem;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.65rem 1.25rem;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  background: var(--accent);
  color: #fff;
  transition: background 0.15s ease;
}

.btn:hover {
  background: var(--accent-hover);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn.secondary {
  background: var(--bg);
  color: var(--text);
  border-color: var(--border);
}

.btn.secondary:hover {
  background: var(--bg-subtle);
}

.btn.small {
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
}

.btn.block {
  width: 100%;
}

/* Alerts and states */

.alert {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  margin: 1rem 0;
}

.alert.error {
  background: var(--danger-soft);
  color: var(--danger);
}

.alert.success {
  background: var(--success-soft);
  color: var(--success);
}

.alert.warning {
  background: var(--warning-soft);
  color: var(--warning);
}

.hidden {
  display: none !important;
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

.empty-state h2 {
  color: var(--text);
  font-size: 1.15rem;
  margin-bottom: 0.4rem;
}

.spinner {
  width: 22px;
  height: 22px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 0 auto;
}

.loading-block {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--text-muted);
}

.loading-block .spinner {
  margin-bottom: 0.75rem;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Tables */

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  min-width: 560px;
}

th,
td {
  text-align: left;
  padding: 0.65rem 0.9rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

th {
  background: var(--bg-subtle);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

tr:last-child td {
  border-bottom: none;
}

/* Result panel (single vCard success) */

.result-panel {
  display: grid;
  gap: 1.5rem;
  align-items: start;
}

@media (min-width: 640px) {
  .result-panel {
    grid-template-columns: 200px 1fr;
  }
}

.qr-preview {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  background: #fff;
  text-align: center;
}

.qr-preview img {
  width: 100%;
  max-width: 176px;
  image-rendering: pixelated;
}

.qr-toggle {
  display: flex;
  gap: 0.35rem;
  justify-content: center;
  margin: 0.6rem 0 0.35rem;
}

.qr-toggle button {
  padding: 0.3rem 0.8rem;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
}

.qr-toggle button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.copy-row {
  display: flex;
  gap: 0.5rem;
  margin: 0.5rem 0 1rem;
}

.copy-row input {
  flex: 1;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
  background: var(--bg-subtle);
}

/* Feature strip on home page */

.features {
  display: grid;
  gap: 1rem;
  margin-top: 3rem;
}

@media (min-width: 720px) {
  .features {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  background: var(--bg-subtle);
}

.feature h3 {
  font-size: 1rem;
  margin-bottom: 0.35rem;
}

.feature p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Dashboard */

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.toolbar input[type="search"] {
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  min-width: 220px;
  font-family: inherit;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

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

.stat .value {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.stat .label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.1rem 0.5rem;
  border-radius: 99px;
  background: var(--accent-soft);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge.gray {
  background: var(--bg-subtle);
  color: var(--text-muted);
}

/* Bulk upload steps */

.steps {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
}

.step-pill {
  font-size: 0.82rem;
  padding: 0.3rem 0.8rem;
  border-radius: 99px;
  background: var(--bg-subtle);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.step-pill.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.step-pill.done {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: transparent;
}

.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2.5rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.dropzone strong {
  color: var(--text);
}

.mapping-grid {
  display: grid;
  gap: 0.75rem;
}

.mapping-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  align-items: center;
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-subtle);
}

.mapping-row .col-name {
  font-weight: 600;
  font-size: 0.9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mapping-row select {
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.9rem;
  background: var(--bg);
}

.actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.qr-thumb {
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 6px;
}

/* Public vCard preview page */

.vcard-page {
  background: var(--bg-subtle);
}

.vcard-card {
  max-width: 420px;
  margin: 3rem auto;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.vcard-banner {
  height: 84px;
  background: linear-gradient(120deg, var(--accent), #7c73f0);
}

.vcard-body {
  padding: 0 1.75rem 1.75rem;
  text-align: center;
}

.vcard-avatar {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 1.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: -42px auto 0.9rem;
  border: 4px solid var(--bg);
}

.vcard-body h1 {
  font-size: 1.4rem;
  letter-spacing: -0.02em;
}

.vcard-body .role {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.vcard-fields {
  text-align: left;
  display: grid;
  gap: 0.35rem;
  margin-bottom: 1.5rem;
}

.vcard-field {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
}

.vcard-field:last-child {
  border-bottom: none;
}

.vcard-field .k {
  color: var(--text-muted);
  flex-shrink: 0;
}

.vcard-field .v {
  text-align: right;
  word-break: break-word;
}

/* Analytics */

.chart-card canvas {
  width: 100%;
  height: auto;
  display: block;
}

.source-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* Auth page */

.auth-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.auth-tabs button {
  flex: 1;
  padding: 0.7rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
}

.auth-tabs button.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-muted);
  font-size: 0.82rem;
  margin: 1.25rem 0;
}

.divider::before,
.divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 1.25rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 3rem;
}