/* styles.css */

/* 1. FONT IMPORTS */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&family=Roboto:wght@400;500&display=swap');

/* 2. CSS VARIABLES (Design System Foundation) */
:root {
  /* Colors */
  --color-primary: #00704A; /* Starbucks Green */
  --color-primary-light: #008f5e;
  --color-background: #111827; /* Dark Blue/Gray */
  --color-surface: #1F2937; /* Slightly lighter for cards/panels */
  --color-text: #F3F4F6; /* Off-white */
  --color-text-muted: #9CA3AF; /* Gray for secondary text */
  --color-border: #374151;

  /* Typography */
  --font-primary: 'Poppins', sans-serif;
  --font-secondary: 'Roboto', sans-serif;
  --fs-base: 1rem; /* 16px */
  --fs-sm: 0.875rem; /* 14px */
  --fs-lg: 1.125rem; /* 18px */
  --fs-xl: 1.25rem; /* 20px */
  --fs-h3: 1.5rem; /* 24px */
  --fs-h2: 2.25rem; /* 36px */
  --fs-h1: 3rem; /* 48px */

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-section: 6rem;

  /* Other */
  --border-radius: 0.5rem;
  --transition-fast: 0.2s ease-in-out;
  --max-width: 1200px;
}

/* 3. CSS RESET */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 100%; /* 16px */
}

body {
  font-family: var(--font-secondary);
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* CRITICAL: Responsive Images */
img, picture, video, canvas, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

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

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

/* 4. TYPOGRAPHY */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
p { margin-bottom: var(--space-md); }

/* 5. LAYOUT & UTILITY CLASSES */
.container {
  width: 90%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

.section {
  padding-top: var(--space-section);
  padding-bottom: var(--space-section);
}

.grid {
  display: grid;
  gap: var(--space-md);
}

.flex {
  display: flex;
  gap: var(--space-md);
}

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

.text-primary {
  color: var(--color-primary);
}

/* 6. GLOBAL COMPONENTS */

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: var(--fs-sm);
  border-radius: var(--border-radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 1px;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-light);
  color: #fff;
  transform: translateY(-2px);
}

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

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

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: var(--space-sm) 0;
  z-index: 1000;
  background-color: transparent;
  transition: background-color var(--transition-fast), padding var(--transition-fast);
}

.site-header.scrolled {
  background-color: rgba(17, 24, 39, 0.9);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
  padding: var(--space-xs) 0;
}

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

.logo {
  font-family: var(--font-primary);
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--color-text);
}

.logo span {
  color: var(--color-primary);
}

.primary-navigation ul {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.primary-navigation a {
  color: var(--color-text);
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
}

.primary-navigation a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-fast);
}

.primary-navigation a:hover::after,
.primary-navigation a.active::after {
  width: 100%;
}

.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.mobile-nav-toggle .icon-bar {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--color-text);
  margin: 5px 0;
  transition: all var(--transition-fast);
}

/* Footer */
.site-footer {
  background-color: var(--color-surface);
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
}

.footer-column h4 {
  font-size: var(--fs-lg);
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.footer-column ul li {
  margin-bottom: var(--space-xs);
}

.footer-column a {
  color: var(--color-text-muted);
}

.footer-column a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
}

/* 7. RESPONSIVENESS */
@media (max-width: 768px) {
  :root {
    --fs-h2: 1.75rem;
    --fs-h1: 2.25rem;
    --space-section: 4rem;
  }

  .mobile-nav-toggle {
    display: block;
  }

  .primary-navigation {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    background-color: var(--color-surface);
    padding: var(--space-xl);
    padding-top: 6rem;
    transition: right 0.3s ease-in-out;
    box-shadow: -5px 0 15px rgba(0,0,0,0.2);
  }

  .primary-navigation.nav-open {
    right: 0;
  }

  .primary-navigation ul {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-lg);
  }

  .primary-navigation .btn {
    width: 100%;
  }

  /* Hamburger animation */
  .nav-open .mobile-nav-toggle .icon-bar:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }
  .nav-open .mobile-nav-toggle .icon-bar:nth-child(2) {
    opacity: 0;
  }
  .nav-open .mobile-nav-toggle .icon-bar:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
  }
}