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

:root {
  --nb-bg: #0f1419;
  --nb-surface: #ffffff;
  --nb-text: #1a1d21;
  --nb-muted: #5c6570;
  --nb-accent: #0d9488;
  --nb-accent-hover: #0f766e;
  --nb-radius: 12px;
  --nb-shadow: 0 4px 24px rgba(15, 20, 25, 0.08);
  --nb-shadow-lg: 0 12px 40px rgba(15, 20, 25, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  margin: 0;
  padding: 0;
  min-height: 100%;
  color: var(--nb-text);
  -webkit-font-smoothing: antialiased;
}

html {
  height: 100%;
}

.header {
  background: linear-gradient(135deg, var(--nb-bg) 0%, #1a2332 100%);
  color: white;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.header h1 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.menu ul {
  list-style: none;
  display: flex;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.menu a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  padding: 0.45rem 0.85rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.15s ease, color 0.15s ease;
}

.menu a:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.main-container {
  min-height: calc(100vh - 140px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2.5rem 1.5rem;
  background: linear-gradient(180deg, #f8fafb 0%, #eef2f6 100%);
}

.bienvenida {
  max-width: 520px;
  margin: auto;
  padding: 1rem;
}

.bienvenida h2 {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin: 0 0 1rem;
  color: var(--nb-bg);
}

.bienvenida p {
  color: var(--nb-muted);
  line-height: 1.65;
  font-size: 1.05rem;
  margin: 0;
}

.btn-cta {
  display: inline-block;
  margin-top: 1.75rem;
  background: var(--nb-accent);
  color: white;
  padding: 0.85rem 1.75rem;
  border-radius: var(--nb-radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: 0 4px 14px rgba(13, 148, 136, 0.35);
  transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.btn-cta:hover {
  background: var(--nb-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(13, 148, 136, 0.4);
}

.footer {
  text-align: center;
  padding: 1.25rem;
  background: #fff;
  border-top: 1px solid #e8ecf0;
  color: var(--nb-muted);
  font-size: 0.85rem;
}

/* Auth */
.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 80px);
  padding: 1.5rem;
  background: linear-gradient(160deg, #0f1419 0%, #1a2f3d 45%, #e8f4f2 45%, #f0f4f8 100%);
}

.auth-card {
  background: var(--nb-surface);
  padding: 2rem 2rem 2.25rem;
  border-radius: var(--nb-radius);
  box-shadow: var(--nb-shadow-lg);
  width: 100%;
  max-width: 400px;
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.auth-card h1 {
  text-align: center;
  margin: 0 0 0.25rem;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.auth-card label {
  display: block;
  margin-top: 1rem;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--nb-text);
}

.auth-card input[type='text'],
.auth-card input[type='email'],
.auth-card input[type='password'] {
  width: 100%;
  padding: 0.65rem 0.85rem;
  margin-top: 0.35rem;
  border: 1px solid #d8dee6;
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.auth-card input:focus {
  outline: none;
  border-color: var(--nb-accent);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.2);
}

.auth-card button {
  width: 100%;
  margin-top: 1.35rem;
  padding: 0.75rem;
  background: var(--nb-accent);
  border: none;
  color: white;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--nb-radius);
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s ease, transform 0.1s ease;
}

.auth-card button:hover {
  background: var(--nb-accent-hover);
}

.auth-card button:active {
  transform: scale(0.99);
}

.switch-auth {
  text-align: center;
  margin-top: 1.25rem;
  font-size: 0.9rem;
  color: var(--nb-muted);
}

.switch-auth a {
  color: var(--nb-accent);
  font-weight: 600;
  text-decoration: none;
}

.switch-auth a:hover {
  text-decoration: underline;
}