/* AlgoPayroll — estilos compartidos, mobile-first */

:root {
  --color-bg: #f4f5f7;
  --color-surface: #ffffff;
  --color-text: #1c1f26;
  --color-text-muted: #6b7280;
  --color-border: #e2e4e9;
  --color-primary: #520685;
  --color-primary-dark: #9f08e5;
  --color-danger: #dc2626;
  --color-danger-bg: #fee2e2;
  --color-success: #16a34a;
  --color-success-bg: #dcfce7;
  --color-warning-bg: #fef3c7;
  --color-warning-text: #92400e;
  --radius: 10px;
  --spacing: 16px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.4;
  -webkit-text-size-adjust: 100%;
}

.container {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: var(--spacing);
}

.container--wide {
  max-width: 1100px;
}

/* Header */

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px var(--spacing);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.app-header h1 {
  font-size: 1.05rem;
  margin: 0;
}

.app-header nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.app-header .teacher-name {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-right: 4px;
}

/* Cards */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing);
  margin-bottom: var(--spacing);
}

.card h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

/* Forms */

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 4px;
  margin-top: 14px;
}

label:first-child {
  margin-top: 0;
}

input[type="text"],
input[type="date"],
input[type="time"],
input[type="number"],
input[type="email"],
select,
textarea {
  width: 100%;
  padding: 12px;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: inherit;
}

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

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

.field-hint {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.char-counter {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  text-align: right;
  margin-top: 4px;
}

.char-counter.is-over {
  color: var(--color-danger);
  font-weight: 600;
}

.radio-group {
  display: flex;
  gap: 10px;
  margin-top: 6px;
}

.radio-option {
  flex: 1;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px;
  text-align: center;
  cursor: pointer;
  font-weight: 600;
  user-select: none;
}

.radio-option input {
  display: none;
}

.radio-option.selected {
  border-color: var(--color-primary);
  background: #eff6ff;
  color: var(--color-primary-dark);
}

.radio-option[data-status="cancelled"].selected {
  border-color: var(--color-danger);
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

/* Buttons */

button,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

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

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

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}

.btn-block {
  width: 100%;
}

.btn-small {
  padding: 6px 12px;
  font-size: 0.85rem;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Messages */

.message {
  padding: 12px 14px;
  border-radius: var(--radius);
  margin-bottom: var(--spacing);
  font-size: 0.92rem;
}

.message-success {
  background: var(--color-success-bg);
  color: #166534;
}

.message-error {
  background: var(--color-danger-bg);
  color: #991b1b;
}

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

/* Status badges */

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
}

.badge-completed {
  background: var(--color-success-bg);
  color: #166534;
}

.badge-cancelled {
  background: var(--color-danger-bg);
  color: #991b1b;
}

/* Course list (flujo profesor) */

.course-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.course-option {
  display: block;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px;
  cursor: pointer;
}

.course-option input {
  display: none;
}

.course-option.selected {
  border-color: var(--color-primary);
  background: #eff6ff;
}

.course-option .course-name {
  font-weight: 700;
}

.course-option .course-meta {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* Tables (panel admin) */

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

th, td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

th {
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Filters */

.filters {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-bottom: var(--spacing);
}

/* Tabs (admin) */

.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing);
  overflow-x: auto;
}

.tab-button {
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  border-radius: 0;
  padding: 10px 14px;
  font-weight: 600;
  color: var(--color-text-muted);
  white-space: nowrap;
}

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

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

/* Utility */

.hidden {
  display: none !important;
}

.text-muted {
  color: var(--color-text-muted);
}

.center {
  text-align: center;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.spinner {
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  width: 28px;
  height: 28px;
  animation: spin 0.7s linear infinite;
  margin: 40px auto;
}

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

.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing);
}

.login-card {
  max-width: 380px;
  width: 100%;
  text-align: center;
}

.login-card .logo {
  max-width: 220px;
  width: 100%;
  height: auto;
  margin-bottom: 4px;
}

.google-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  justify-content: center;
}

/* Payroll summary */

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: var(--spacing);
}

.summary-tile {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px;
}

.summary-tile .value {
  font-size: 1.4rem;
  font-weight: 800;
}

.summary-tile .label {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

@media (min-width: 640px) {
  .filters {
    grid-template-columns: repeat(4, 1fr);
  }

  .summary-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}