@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --primary: #0070f3;
  --primary-hover: #005bb5;
  --primary-light: rgba(0, 112, 243, 0.08);
  --bg: #f4f6f8;
  --card-bg: #ffffff;
  --text: #333333;
  --text-light: #666666;
  --text-muted: #999999;
  --border: #e1e4e8;
  --border-light: #f0f0f0;
  --danger: #dc3545;
  --danger-light: #fff1f1;
  --success: #28a745;
  --success-light: #d4edda;
  --warning: #ffc107;
  --warning-light: #fff3cd;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.2s ease;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0;
}

/* ── Header ── */
.app-header {
  width: 100%;
  background: linear-gradient(135deg, #001f3f 0%, #003366 100%);
  color: white;
  padding: 24px 20px;
  text-align: center;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
}
.app-header h1 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}
.app-header p {
  font-size: 13px;
  opacity: 0.75;
  font-weight: 400;
}

/* ── Main Container ── */
.main-container {
  width: 100%;
  max-width: 720px;
  padding: 24px 16px 40px;
  flex: 1;
}

/* ── Stepper ── */
.stepper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 28px;
  padding: 0 10px;
}
.step {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
  transition: color var(--transition);
  white-space: nowrap;
}
.step-number {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--border);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  transition: all var(--transition);
  flex-shrink: 0;
}
.step.active .step-number {
  background: var(--primary);
  color: white;
  box-shadow: 0 0 0 4px var(--primary-light);
}
.step.active {
  color: var(--primary);
  font-weight: 600;
}
.step.completed .step-number {
  background: var(--success);
  color: white;
}
.step.completed { color: var(--success); }
.step-line {
  width: 32px;
  height: 2px;
  background: var(--border);
  margin: 0 6px;
  transition: background var(--transition);
  flex-shrink: 0;
}
.step-line.completed { background: var(--success); }

/* ── Cards ── */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  animation: fadeIn 0.3s ease;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.card-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}
.card-subtitle {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 20px;
}

/* ── Mode Selector ── */
.mode-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.mode-card {
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: white;
}
.mode-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
}
.mode-card.selected {
  border-color: var(--primary);
  background: var(--primary-light);
}
.mode-icon {
  font-size: 28px;
  flex-shrink: 0;
  margin-top: 2px;
}
.mode-info h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}
.mode-info p {
  font-size: 12px;
  color: var(--text-light);
  line-height: 1.4;
}

/* ── Form Elements ── */
.form-group {
  margin-bottom: 16px;
}
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.form-group label .required {
  color: var(--danger);
  margin-left: 2px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 14px;
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
  background: white;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}
.form-group input::placeholder { color: var(--text-muted); }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* ── File Upload ── */
.file-upload {
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 18px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  background: var(--bg);
}
.file-upload:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}
.file-upload.has-file {
  border-color: var(--success);
  background: var(--success-light);
}
.file-upload input[type="file"] {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  opacity: 0;
  cursor: pointer;
}
.file-upload-icon { font-size: 24px; margin-bottom: 6px; }
.file-upload-text {
  font-size: 13px;
  color: var(--text-light);
}
.file-upload-name {
  font-size: 12px;
  color: var(--success);
  font-weight: 600;
  margin-top: 4px;
}

/* ── Buttons ── */
.btn {
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  border: none;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-primary {
  background: var(--primary);
  color: white;
  width: 100%;
  justify-content: center;
  padding: 14px;
  font-size: 15px;
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:disabled {
  background: var(--border);
  color: var(--text-muted);
  cursor: not-allowed;
}
.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}
.btn-secondary:hover { background: var(--primary-light); }
.btn-outline {
  background: transparent;
  color: var(--text-light);
  border: 1px solid var(--border);
}
.btn-outline:hover { border-color: var(--text-light); }
.btn-danger {
  background: var(--danger);
  color: white;
  padding: 6px 12px;
  font-size: 12px;
}
.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.btn-row {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}
.btn-row .btn { flex: 1; justify-content: center; }

/* ── Payment ── */
.payment-summary {
  background: var(--bg);
  border-radius: var(--radius-sm);
  padding: 20px;
  margin-bottom: 20px;
}
.payment-line {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 4px 14px;
  align-items: baseline;
  padding: 6px 0;
  font-size: 14px;
}
.payment-qty {
  font-size: 12px;
  color: var(--text-light);
  font-style: italic;
  text-align: right;
  white-space: nowrap;
}
.payment-amount {
  text-align: right;
  min-width: 80px;
  white-space: nowrap;
}
.payment-line.total {
  border-top: 2px solid var(--border);
  margin-top: 8px;
  padding-top: 12px;
  font-weight: 700;
  font-size: 16px;
  color: var(--primary);
}
.payment-line.discount { color: var(--success); }
.bank-info {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 16px;
}
.bank-info-title {
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}
.bank-info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  padding: 4px 0;
  color: var(--text-light);
}
.bank-info-row strong { color: var(--text); }
.copy-btn {
  background: var(--primary-light);
  color: var(--primary);
  border: none;
  border-radius: 4px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition);
}
.copy-btn:hover { background: rgba(0, 112, 243, 0.15); }

/* ── Coupon ── */
.coupon-row {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}
.coupon-row input { flex: 1; }
.coupon-msg {
  font-size: 12px;
  margin-top: 4px;
}
.coupon-msg.valid { color: var(--success); }
.coupon-msg.invalid { color: var(--danger); }

/* ── Institutional Grid ── */
.grid-controls {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.tech-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
  margin-bottom: 12px;
  table-layout: fixed;
}
.tech-table td {
  padding: 0;
  border: 1px solid var(--border);
  vertical-align: middle;
}
/* Separador entre técnicos */
.tech-row-top td {
  border-top: 2px solid #8fa8c8;
}
/* Número de fila */
.tech-num {
  width: 28px;
  text-align: center;
  font-weight: 700;
  font-size: 13px;
  color: var(--text-light);
  vertical-align: middle !important;
  background: var(--bg) !important;
}
/* Botón eliminar */
.tech-del {
  width: 36px;
  text-align: center;
  vertical-align: middle !important;
}
/* Contenedor campo con etiqueta */
.tech-field {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.tech-label {
  font-size: 9px;
  font-weight: 600;
  color: #aab;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 3px 8px 0;
  line-height: 1;
  user-select: none;
  white-space: nowrap;
}
.tech-table input {
  width: 100%;
  flex: 1;
  padding: 4px 8px 6px;
  border: none;
  border-radius: 0;
  font-size: 12px;
  font-family: inherit;
  background: transparent;
  box-sizing: border-box;
}
.tech-table input:focus {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--primary);
  background: white;
}
/* Grid interior de la fila 2 */
.tech-row2 {
  display: grid;
  grid-template-columns: 1.5fr 0.75fr 2fr 0.55fr 1.4fr auto;
  align-items: stretch;
}
.tech-row2 > .tech-field {
  border-right: 1px solid var(--border);
}
.tech-files {
  display: flex;
  gap: 3px;
  padding: 3px 5px;
  align-items: center;
  flex-wrap: nowrap;
}
.tech-file-btn {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 3px 7px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: white;
  font-size: 11px;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.tech-file-btn:hover { border-color: var(--primary); color: var(--primary); }
.tech-file-btn.loaded { border-color: var(--success); color: var(--success); background: var(--success-light); }

/* ── Feedback / Alerts ── */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.alert-success { background: var(--success-light); color: #155724; }
.alert-error { background: var(--danger-light); color: var(--danger); }
.alert-warning { background: var(--warning-light); color: #856404; }
.alert-info { background: var(--primary-light); color: var(--primary); }

.progress-bar {
  width: 100%;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
  margin: 12px 0;
}
.progress-bar-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 2px;
  transition: width 0.4s ease;
}

/* ── Success Screen ── */
.success-screen {
  text-align: center;
  padding: 40px 20px;
}
.success-icon {
  font-size: 64px;
  margin-bottom: 16px;
}
.success-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--success);
}
.success-text {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.5;
  max-width: 400px;
  margin: 0 auto 24px;
}

/* ── Responsive ── */
@media (min-width: 600px) {
  .mode-grid { grid-template-columns: 1fr 1fr 1fr; }
  .main-container { padding: 32px 24px 48px; }
}
@media (min-width: 900px) {
  .main-container--wide { max-width: 1100px; }
}
@media (max-width: 599px) {
  .form-row { grid-template-columns: 1fr; }
  .step span { display: none; }
  .step-line { width: 20px; }
  .card { padding: 20px 16px; }
  .tech-table { font-size: 11px; }
  .tech-row2 { grid-template-columns: 1.5fr 0.75fr 2fr 0.55fr 1.4fr auto; }
}