/* ===== VARIÁVEIS ===== */
:root {
  --bg-body: #f4f6fc;
  --bg-card: #ffffff;
  --bg-soft: #f8fafc;
  
  --border-soft: #e2e8f0;
  --border-medium: #cbd5e1;
  
  --primary: #0b5cff;
  --primary-hover: #0948d6;
  --primary-soft: #e9f0ff;
  
  --text-main: #111827;
  --text-secondary: #1e293b;
  --text-muted: #6b7280;
  
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-primary: 0 4px 12px rgba(11, 92, 255, 0.3);
  
  --radius-md: 10px;
  --radius-lg: 12px;
  
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 20px;
  --spacing-2xl: 24px;
  
  --font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-size-sm: 13px;
  --font-size-base: 14px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 28px;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  
  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;
  --info: #3b82f6;
}

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

body {
  background: var(--bg-body);
  font-family: var(--font-family);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
}

/* ===== CONTAINER ===== */
.login-container {
  width: 100%;
  max-width: 420px;
  animation: fadeIn var(--transition-base) ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== CARD ===== */
.login-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-2xl);
  border: 1px solid var(--border-soft);
}

.login-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.login-header h1 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
}

.login-header p {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

/* ===== FLASH MESSAGES ===== */
.flash-messages {
  margin-bottom: var(--spacing-lg);
}

.flash-message {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  animation: slideIn var(--transition-fast) ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-10px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.flash-error {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.flash-success {
  background: #d1fae5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.flash-warning {
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fde68a;
}

.flash-info {
  background: #dbeafe;
  color: #1e40af;
  border: 1px solid #bfdbfe;
}

/* ===== FORM ===== */
.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.form-group label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.form-group input {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  background: var(--bg-soft);
  transition: var(--transition-fast);
  outline: none;
}

.form-group input:focus {
  border-color: var(--primary);
  background: var(--bg-card);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.form-group input::placeholder {
  color: var(--text-muted);
}

/* ===== BUTTON ===== */
.btn-login {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  font-family: var(--font-family);
  cursor: pointer;
  transition: var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.btn-login:hover {
  box-shadow: var(--shadow-primary);
  transform: translateY(-1px);
}

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

/* ===== FOOTER ===== */
.login-footer {
  margin-top: var(--spacing-xl);
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-soft);
}

.link-recuperar {
  color: var(--primary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  transition: var(--transition-fast);
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 480px) {
  .login-card {
    padding: var(--spacing-xl);
  }
  
  .login-header h1 {
    font-size: var(--font-size-xl);
  }
}