/* styles.css */

/* 1. CSS RESET */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-background);
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input, button, textarea, select {
  font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}

ul, ol {
  list-style: none;
}

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

a:hover {
  text-decoration: underline;
}


/* 2. CSS VARIABLES */
:root {
  /* Colors */
  --color-primary: #007bff;
  --color-primary-dark: #0056b3;
  --color-secondary: #6c757d;
  --color-accent: #ffc107;
  --color-text: #333333;
  --color-background: #ffffff;
  --color-light-gray: #f8f9fa;
  --color-border: #dee2e6;

  /* Typography */
  --font-family-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-serif: "Georgia", "Times New Roman", serif;
  --font-size-base: 1rem; /* 16px */
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-h1: 2.5rem;
  --font-size-h2: 2rem;
  --font-size-h3: 1.75rem;

  /* 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: 4rem;   /* 64px */

  /* Layout */
  --container-width: 1140px;
  --container-padding: 1rem;

  /* Misc */
  --border-radius: 0.25rem;
  --transition-speed: 0.2s ease-in-out;
}


/* 3. UTILITY CLASSES */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.flex {
  display: flex;
}

.grid {
  display: grid;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-center {
  justify-content: center;
}

.text-center {
  text-align: center;
}

.d-none {
  display: none;
}


/* 4. GLOBAL COMPONENTS */

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: var(--border-radius);
  transition: all var(--transition-speed);
  user-select: none;
}

.btn-primary {
  color: #fff;
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  text-decoration: none;
}

/* Header & Navigation */
.main-header {
  padding: var(--spacing-md) 0;
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
}

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

.main-nav ul {
  display: flex;
  gap: var(--spacing-lg);
}

.main-nav a {
  font-weight: 600;
  color: var(--color-text);
  padding: var(--spacing-sm) 0;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-primary);
  text-decoration: none;
}

.menu-toggle {
  display: none; /* Hidden on desktop */
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1001;
}


/* 5. RESPONSIVENESS */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .main-nav {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 80%;
    max-width: 300px;
    background-color: var(--color-background);
    box-shadow: -2px 0 5px rgba(0,0,0,0.1);
    z-index: 1000;
    padding-top: var(--spacing-xxl);
  }

  .main-nav.is-open {
    display: block;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: center;
    width: 100%;
  }

  .main-nav li {
    width: 100%;
    text-align: center;
  }

  .main-nav a {
    display: block;
    padding: var(--spacing-md);
    font-size: var(--font-size-lg);
  }
}