:root {
  --brand-blue: #274768;
  --brand-mint: #91dbc0;
  --primary-color: var(--brand-blue);
  --primary-light: #d1f0e4;
  --success-color: #2e7d56;
  --danger-color: #d64045;
  --warning-color: #e89828;
  --secondary-color: #6c757d;
  --bg-color: #f4f7f6;
  --card-bg: #ffffff;
  --text-color: #274768;
  --text-muted: #5f7d96;
  --border-color: #cce3de;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --border-radius: 0.75rem;
  --box-shadow: 0 4px 20px rgba(39, 71, 104, 0.08);
  --icon-shadow: none;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding: 1.5em;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.header {
  text-align: center;
  margin-bottom: 2rem;
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

.app-logo {
  width: 64px;
  height: 64px;
  filter: drop-shadow(0 4px 6px rgba(39, 71, 104, 0.2));
}

.header p {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.main-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2em;
}

.left-column,
.right-column {
  display: flex;
  flex-direction: column;
  gap: 2em;
  min-width: 0;
}

@media (min-width: 992px) {
  .main-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 1.5em;
  box-shadow: var(--box-shadow);
  border: 1px solid rgba(145, 219, 192, 0.3);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
  font-size: 1.25rem;
  font-weight: 500;
}

.card-header span {
  text-shadow: var(--icon-shadow);
}

form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

label {
  font-weight: 500;
}

input,
select {
  width: 100%;
  padding: 0.75em;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-sizing: border-box;
  font-size: 1em;
  font-family: inherit;
  background-color: var(--card-bg);
}

select {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  padding-right: 2.5em;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%236c757d'%3e%3cpath d='M8 11.25a.75.75 0 0 1-.53-.22l-4-4a.75.75 0 1 1 1.06-1.06L8 9.44l3.47-3.47a.75.75 0 1 1 1.06 1.06l-4 4a.75.75 0 0 1-.53.22z'/%3e%3c/svg%3e");
  background-position: right 0.75em center;
  background-repeat: no-repeat;
  background-size: 1em;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px var(--brand-mint);
}

button {
  padding: 0.75em 1.5em;
  border: none;
  border-radius: var(--border-radius);
  background-color: var(--primary-color);
  color: white;
  font-size: 1em;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

button:hover {
  filter: brightness(1.1);
}

button.danger {
  background-color: var(--danger-color);
}

button.warning {
  background-color: var(--warning-color);
  color: var(--text-color);
}

button.secondary {
  background-color: white;
  border: 1px solid var(--border-color);
  color: var(--text-color);
}

button.secondary:hover {
  background-color: var(--primary-light);
  border-color: var(--brand-mint);
}

.people-list-container {
  overflow-x: auto;
  padding-bottom: 0.75rem;
  /* Space for scrollbar */
}

.people-list {
  display: flex;
  gap: 0.5rem;
  padding: 0.25rem 0;
  width: max-content;
}

.person-pill {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary-color);
  background-color: white;
  border: 1px solid var(--brand-mint);
  padding: 0.5rem 0.75rem;
  border-radius: 999px;
  font-weight: 500;
  white-space: nowrap;
}

.person-pill input {
  padding: 0.1em;
  width: 8em;
  font-weight: 500;
}

.person-action-btn,
.delete-person-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0;
  width: 1.25em;
  height: 1.25em;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9em;
  line-height: 1;
  transition: all 0.2s;
}

.person-action-btn:hover {
  color: var(--primary-color);
  background-color: var(--primary-light);
}

.delete-person-btn {
  background: var(--text-muted);
  color: white;
}

.delete-person-btn:hover {
  background-color: var(--danger-color);
}

/* Minimal scrollbar */
.people-list-container::-webkit-scrollbar {
  height: 8px;
}

.people-list-container::-webkit-scrollbar-track {
  background: transparent;
}

.people-list-container::-webkit-scrollbar-thumb {
  background-color: var(--border-color);
  border-radius: 10px;
}

/* Transaction Tabs */
.tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.tab-button {
  padding: 0.75rem 1rem;
  border: none;
  border-bottom: 3px solid transparent;
  background: none;
  font-size: 1em;
  font-weight: 500;
  cursor: pointer;
  color: var(--text-muted);
}

.tab-button.active {
  border-bottom-color: var(--primary-color);
  color: var(--text-color);
}

/* Participants Grid */
.participants-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 0.5rem;
}

.participant-item label {
  display: block;
  padding: 0.6em 0.5em;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  text-align: center;
  transition: all 0.2s ease-in-out;
  user-select: none;
  white-space: nowrap;
  /* Evita que el texto salte a una nueva línea */
  overflow: hidden;
  /* Oculta el texto que se desborda */
  text-overflow: ellipsis;
  /* Muestra "..." en el texto oculto */
  color: var(--text-muted);
  background-color: white;
}

.participant-item label:hover {
  border-color: var(--brand-mint);
  background-color: #f8f9fa;
}

.participant-item input:checked+label {
  background-color: var(--primary-light);
  color: var(--primary-color);
  border-color: var(--primary-color);
  font-weight: 600;
  box-shadow: 0 0 0 1px var(--primary-color);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Custom Split */
#custom-split-container {
  border-left: 3px solid var(--primary-color);
  padding-left: 1rem;
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.custom-split-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 1rem;
}

/* Results & History */
.results-list,
.history-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.results-list li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--border-color);
  gap: 0.5rem;
}

.results-list li:last-child {
  border-bottom: none;
}

.debt-item span {
  font-weight: 500;
}

.debt-arrow {
  color: var(--primary-color);
  font-size: 1.2rem;
}

.history-list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-color);
}

.history-list li:last-child {
  border-bottom: none;
}

.history-icon {
  font-size: 1.5rem;
  margin-top: 0.1rem;
  text-shadow: var(--icon-shadow);
}

.history-details .description {
  font-weight: 500;
}

.history-details .metadata {
  font-size: 0.9em;
  color: var(--text-muted);
}

.history-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
}

.history-action-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  padding: 0.5rem;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.history-action-btn:hover {
  color: var(--primary-color);
  background-color: var(--bg-color);
}

.history-action-btn.delete:hover {
  color: var(--danger-color);
  background-color: #ffebee;
}

/* Details/Summary for Totals */
details {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
}

summary {
  font-weight: 500;
  cursor: pointer;
  padding: 1rem;
  background-color: var(--bg-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

summary::after {
  content: '▼';
  font-size: 0.8em;
}

details[open] summary::after {
  content: '▲';
}

.details-content {
  padding: 0 1rem;
}

/* Share Section */
#share-section {
  display: flex;
  gap: 1em;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

/* Helpers */
.empty-state {
  color: var(--text-muted);
  text-align: center;
  padding: 0;
  margin: 0;
}

.form-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

footer {
  text-align: center;
  margin-top: 2rem;
  padding-top: 1rem;
  font-size: 0.9em;
  color: var(--text-muted);
}

[x-cloak] {
  display: none !important;
}

/* Notifications */
.notification-container {
  position: fixed;
  top: 1.5em;
  right: 1.5em;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 320px;
}

.notification {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  color: white;
  font-weight: 500;
}

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

.notification-warning {
  background-color: var(--warning-color);
  color: var(--text-color);
}

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

.notification-info {
  background-color: var(--primary-color);
}

.notification button {
  background: none;
  border: none;
  color: inherit;
  opacity: 0.7;
  font-size: 1.5em;
  line-height: 1;
  padding: 0;
  cursor: pointer;
  margin-left: auto;
  flex-shrink: 0;
}

.notification button:hover {
  opacity: 1;
  filter: none;
}

/* Confirmation Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 1em;
}

.modal-box {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 1.5em;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  max-width: 450px;
  width: 100%;
  border: 1px solid var(--border-color);
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: 0;
  margin-bottom: 0.75rem;
}

.modal-message {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

.empty-state-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  width: 100%;
  padding: 0.5rem 0;
}

.demo-btn {
  background-color: var(--bg-color);
  color: var(--primary-color);
  font-size: 0.9em;
  padding: 0.5em 1em;
  border: 1px dashed var(--primary-color);
  width: 100%;
  max-width: 200px;
}

.demo-btn:hover {
  background-color: var(--primary-light);
  border-style: solid;
  color: var(--primary-color);
}

.link-btn {
  background: none;
  border: none;
  color: var(--primary-color);
  padding: 0;
  font-size: inherit;
  text-decoration: underline;
  cursor: pointer;
}

.link-btn:hover {
  color: var(--brand-mint);
}

.modal-wide {
  max-width: 600px;
  display: flex;
  flex-direction: column;
  max-height: 80vh;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  flex-shrink: 0;
}

.modal-header .modal-title {
  margin: 0;
}

.close-modal-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  padding: 0;
  color: var(--text-muted);
  cursor: pointer;
}

.modal-content-scroll {
  overflow-y: auto;
  padding-right: 0.5rem;
  flex-grow: 1;
}

/* Scrollbar styling for modal */
.modal-content-scroll::-webkit-scrollbar {
  width: 8px;
}

.modal-content-scroll::-webkit-scrollbar-track {
  background: transparent;
}

.modal-content-scroll::-webkit-scrollbar-thumb {
  background-color: var(--border-color);
  border-radius: 4px;
}

.release-item {
  border-bottom: 1px solid var(--border-color);
  padding: 1.25rem 0;
}

.release-item:first-child {
  padding-top: 0;
}

.release-item:last-child {
  border-bottom: none;
}

.release-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.release-tag {
  background-color: var(--brand-blue);
  color: white;
  padding: 0.2em 0.6em;
  border-radius: 4px;
  font-size: 0.85em;
  font-weight: 700;
}

.release-date {
  color: var(--text-muted);
  font-size: 0.85em;
}

.release-body {
  font-size: 0.95em;
  line-height: 1.5;
  color: var(--text-color);
}

.release-body code {
  background-color: #f1f3f5;
  padding: 0.1em 0.3em;
  border-radius: 3px;
  font-family: monospace;
  font-size: 0.9em;
}

.loading-state,
.error-state {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
}

.update-toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1500;
  width: max-content;
  max-width: 90vw;
}

.update-content {
  background-color: var(--brand-blue);
  color: white;
  padding: 0.75rem 1.25rem;
  border-radius: 50px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  gap: 1rem;
  font-weight: 500;
}

.update-content button {
  background-color: var(--brand-mint);
  color: var(--brand-blue);
  border: none;
  padding: 0.4em 1em;
  font-size: 0.9em;
  border-radius: 20px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
}

.update-content button:hover {
  background-color: white;
}