/* Login & Register Form Styles - Minimalistický, sleek design */

:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #dbeafe;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border-color: #e2e8f0;
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-page: #f0f9ff;
  --error: #ef4444;
  --success: #10b981;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: "Montserrat", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg-page);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.auth-container {
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
}

.auth-card {
  background: var(--bg-primary);
  border-radius: var(--radius);
  padding: 2.25rem 2.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.auth-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.375rem;
  letter-spacing: -0.02em;
}

.auth-header p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group:last-of-type {
  margin-bottom: 0;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.form-row .form-group {
  margin-bottom: 0;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4375rem;
  letter-spacing: 0.01em;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-primary);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  outline: none;
}

.form-control::placeholder {
  color: var(--text-secondary);
  opacity: 0.6;
}

.form-control:hover {
  border-color: #cbd5e1;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  outline: none;
}

.btn {
  width: 100%;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  color: white;
  background: var(--primary);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.01em;
  outline: none;
  margin-top: 0.5rem;
}

.btn:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn:active {
  transform: translateY(0);
}

.btn:focus {
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.btn-secondary {
  background: transparent;
  color: var(--text-secondary);
  border: 1.5px solid var(--border-color);
  margin-top: 0.75rem;
}

.btn-secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--border-color);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.alert {
  padding: 0.875rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
  border: 1px solid;
  line-height: 1.5;
}

.alert-danger {
  background: #fef2f2;
  border-color: #fecaca;
  color: var(--error);
}

.alert-success {
  background: #f0fdf4;
  border-color: #bbf7d0;
  color: var(--success);
}

.alert-success a {
  color: var(--success);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
}

.alert-success a:hover {
  text-decoration: underline;
}

.auth-footer {
  text-align: center;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.auth-footer p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.auth-footer a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
}

.auth-footer a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

.auth-link {
  display: inline-block;
  margin-top: 1rem;
  color: var(--primary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  transition: var(--transition);
}

.auth-link:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* Responzivní design */
@media (max-width: 768px) {
  .auth-container {
    max-width: 100%;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .form-row .form-group {
    margin-bottom: 1.5rem;
  }
}

@media (max-width: 576px) {
  body {
    padding: 1rem 0.75rem;
  }

  .auth-card {
    padding: 2rem 1.75rem;
    border-radius: var(--radius-sm);
  }

  .auth-header {
    margin-bottom: 1.75rem;
  }

  .auth-header h1 {
    font-size: 1.625rem;
  }

  .auth-header p {
    font-size: 0.875rem;
  }

  .form-control {
    padding: 0.75rem 0.875rem;
    font-size: 0.875rem;
  }

  .btn {
    padding: 0.75rem 1.25rem;
    font-size: 0.875rem;
  }
}

@media (max-width: 400px) {
  .auth-card {
    padding: 2rem 1.5rem;
  }

  .auth-header {
    margin-bottom: 2rem;
  }
}

/* Dark mode support (optional) */
@media (prefers-color-scheme: dark) {
  /* Zatím ponecháno pro budoucí rozšíření */
}