/* ==========================================================================
   PLATAFORMA SAAS MULTINOTAS - ESTILOS PREMIUM GLASSMORPHISM DARK MODE
   ========================================================================== */

:root {
  --bg-main: #0b0f19;
  --bg-card: #151c2c;
  --bg-card-hover: #1e283d;
  --accent-green: #3ae374;
  --accent-blue: #00d2d3;
  --accent-purple: #9c88ff;
  --accent-orange: #ff9f43;
  --accent-red: #ff3838;
  --text-main: #f0f6fc;
  --text-muted: #8b949e;
  --border-color: rgba(255, 255, 255, 0.1);
  --font-family: 'Outfit', 'Inter', -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
}

body {
  background: var(--bg-main);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header & Top Bar */
.saas-header {
  background: rgba(21, 28, 44, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.saas-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-main);
}

.saas-brand span {
  color: var(--accent-green);
}

.user-profile-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.05);
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
}

.btn-logout {
  background: rgba(255, 56, 56, 0.15);
  color: var(--accent-red);
  border: 1px solid rgba(255, 56, 56, 0.3);
  padding: 4px 10px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.78rem;
}

/* Layout Principal */
.saas-main-content {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 16px;
}

/* Pantalla de Login */
.login-container {
  max-width: 400px;
  margin: 80px auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 32px 28px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
  text-align: center;
}

.login-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.login-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 16px;
  text-align: left;
}

.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-input, .form-select {
  width: 100%;
  padding: 12px 14px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-main);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-input:focus, .form-select:focus {
  border-color: var(--accent-green);
}

.btn-primary-action {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #2ecc71, #10ac84);
  color: #fff;
  border: none;
  border-radius: 14px;
  font-size: 1rem;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(46, 204, 113, 0.3);
  transition: transform 0.15s ease;
}

.btn-primary-action:active {
  transform: scale(0.98);
}

/* Tarjetas de Métricas (KPIs) */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  overflow: hidden;
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-blue));
}

.kpi-title {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
}

.kpi-value {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-main);
}

/* Secciones de Paneles */
.panel-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 24px;
  margin-bottom: 24px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.section-title {
  font-size: 1.2rem;
  font-weight: 800;
}

/* Tablas Minimalistas */
.saas-table-wrapper {
  overflow-x: auto;
}

.saas-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}

.saas-table th {
  padding: 12px 14px;
  color: var(--text-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border-color);
}

.saas-table td {
  padding: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.saas-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.status-badge {
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.status-badge.active { background: rgba(58, 227, 116, 0.15); color: var(--accent-green); }
.status-badge.pending { background: rgba(255, 159, 67, 0.15); color: var(--accent-orange); }
.status-badge.paid { background: rgba(0, 210, 211, 0.15); color: var(--accent-blue); }

/* Lienzo de Firma Digital HTML5 */
.signature-pad-container {
  border: 2px dashed var(--border-color);
  border-radius: 16px;
  background: rgba(0, 0, 0, 0.3);
  padding: 10px;
  text-align: center;
  position: relative;
}

#signatureCanvas {
  background: #ffffff;
  border-radius: 10px;
  cursor: crosshair;
  touch-action: none;
  width: 100%;
  max-width: 450px;
  height: 140px;
}

.btn-clear-sig {
  margin-top: 8px;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 4px 12px;
  border-radius: 8px;
  font-size: 0.78rem;
  cursor: pointer;
}

.btn-clear-sig:hover {
  color: var(--text-main);
  background: rgba(255,255,255,0.08);
}