/* Main CSS - Balan7 Inteligência Contábil */

/* CSS Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Color palette */
  --primary-color: #1a4b8c; /* Blue */
  --primary-dark: #0f325e;
  --primary-light: #3a6ba8;
  --secondary-color: #e63c80; /* Pink */
  --secondary-dark: #c22c68;
  --secondary-light: #f16fa1;
  --accent-color: #f8d62b; /* Yellow */
  --accent-dark: #e5c112;
  --accent-light: #fae064;
  --gray-100: #f8f9fa;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-400: #ced4da;
  --gray-500: #adb5bd;
  --gray-600: #6c757d;
  --gray-700: #495057;
  --gray-800: #343a40;
  --gray-900: #212529;
  --white: #ffffff;
  --black: #000000;
  
  /* Typography */
  --heading-font: 'Montserrat', sans-serif;
  --body-font: 'Open Sans', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.25rem; /* 4px */
  --spacing-sm: 0.5rem;  /* 8px */
  --spacing-md: 1rem;    /* 16px */
  --spacing-lg: 1.5rem;  /* 24px */
  --spacing-xl: 2rem;    /* 32px */
  --spacing-xxl: 3rem;   /* 48px */
  
  /* Border radius */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--body-font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--gray-800);
  background-color: var(--white);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--heading-font);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--gray-900);
}

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-dark);
}

ul, ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Section Styles */
section {
  padding: var(--spacing-xxl) 0;
}

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

.section-header h2 {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  position: absolute;
  width: 50px;
  height: 3px;
  background-color: var(--secondary-color);
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
}

.section-header p {
  font-size: 1.1rem;
  color: var(--gray-600);
}

/* Button Styles */
.btn {
  display: inline-block;
  padding: 0.8rem 1.8rem;
  background-color: var(--primary-color);
  color: var(--white);
  border: none;
  border-radius: var(--border-radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.btn:hover {
  background-color: var(--primary-dark);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--secondary-color);
}

.btn-secondary:hover {
  background-color: var(--secondary-dark);
}

.btn-accent {
  background-color: var(--accent-color);
  color: var(--gray-900);
}

.btn-accent:hover {
  background-color: var(--accent-dark);
  color: var(--gray-900);
}

/* Header Styles */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  padding: var(--spacing-sm) 0;
  transition: all var(--transition-normal);
}

header.sticky {
  padding: 5px 0;
  background-color: var(--white);
  box-shadow: var(--shadow-md);
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 50px;
  transition: height var(--transition-normal);
}

header.sticky .logo img {
  height: 40px;
}

nav {
  display: flex;
  align-items: center;
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-menu li {
  margin-left: var(--spacing-lg);
}

.nav-menu a {
  font-weight: 600;
  color: var(--gray-800);
  padding: 0.5rem;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  background-color: var(--secondary-color);
  bottom: 0;
  left: 0;
  transition: width var(--transition-normal);
}

.nav-menu a:hover {
  color: var(--secondary-color);
}

.nav-menu a:hover::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--primary-color);
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 40px;
  height: 40px;
  background-color: var(--primary-color);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 999;
}

.back-to-top.active {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--primary-dark);
  transform: translateY(-5px);
}

/* Responsive Styles */
@media (max-width: 992px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 80%;
    height: 100vh;
    background-color: var(--white);
    flex-direction: column;
    padding: var(--spacing-xl) 0;
    box-shadow: var(--shadow-lg);
    transition: left var(--transition-normal);
    z-index: 999;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-menu li {
    margin: var(--spacing-sm) 0;
    width: 100%;
    text-align: center;
  }
  
  .nav-menu a {
    display: block;
    padding: var(--spacing-sm) 0;
  }
  
  .menu-toggle {
    display: block;
  }
}

@media (max-width: 768px) {
  .section-header h2 {
    font-size: 2rem;
  }
  
  section {
    padding: var(--spacing-xl) 0;
  }
}

@media (max-width: 576px) {
  .section-header h2 {
    font-size: 1.8rem;
  }
  
  .btn {
    padding: 0.6rem 1.4rem;
    font-size: 0.9rem;
  }
}