/* style.css */
@import 'variables.css';

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.2;
  margin-bottom: var(--space-sm);
  font-weight: 800;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }

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

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

a:hover {
  color: var(--accent-color-hover);
}

ul {
  list-style: none;
}

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

/* Accessibility - Focus visible */
:focus-visible {
  outline: 3px dashed var(--secondary-color);
  outline-offset: 4px;
}

/* Layout Utilities */
.container {
  width: 90%;
  max-width: var(--container-width);
  margin: 0 auto;
}

.section {
  padding: var(--space-2xl) 0;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 9999px; /* Pill shape */
  font-family: var(--font-heading);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  transition: transform var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
  border: 2px solid transparent;
}

.btn:active {
  transform: scale(0.95);
}

.btn-primary {
  background-color: var(--accent-color);
  color: white;
}
.btn-primary:hover {
  background-color: var(--accent-color-hover);
  box-shadow: 0 8px 20px -6px var(--accent-color);
  color: white;
}

.btn-secondary {
  background-color: var(--secondary-color);
  color: hsl(210, 30%, 15%);
}
.btn-secondary:hover {
  background-color: hsl(45, 90%, 45%);
  box-shadow: 0 8px 20px -6px var(--secondary-color);
}

/* Header & Nav */
.header {
  position: sticky;
  top: 0;
  background-color: var(--bg-color);
  border-bottom: 2px solid var(--border-color);
  z-index: 1000;
  padding: var(--space-sm) 0;
  transition: background-color var(--transition-normal);
}

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

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.nav-link {
  font-weight: 600;
  color: var(--text-color);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--accent-color);
  transition: width var(--transition-fast);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-link.active {
  color: var(--accent-color);
}

/* Theme Toggle Button */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-color);
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: var(--card-bg);
}

.theme-toggle svg {
  width: 24px;
  height: 24px;
}

/* Mobile menu toggle */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-color);
}

.mobile-menu-btn svg { width: 32px; height: 32px; }

@media (max-width: 768px) {
  .mobile-menu-btn { display: block; }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 400px;
    height: 100vh;
    background-color: var(--card-bg);
    flex-direction: column;
    padding: var(--space-2xl) var(--space-lg);
    transition: right var(--transition-normal);
    box-shadow: -5px 0 15px rgba(0,0,0,0.1);
  }

  .nav-links.open {
    right: 0;
  }
}

/* Cards */
.card {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: var(--space-lg);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

/* Footer */
.footer {
  background-color: var(--card-bg);
  border-top: 1px solid var(--border-color);
  padding: var(--space-xl) 0 var(--space-lg);
  margin-top: var(--space-2xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.footer h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: var(--text-color-muted);
}
.footer-links a:hover {
  color: var(--accent-color);
}

.footer-bottom {
  text-align: center;
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-color);
  color: var(--text-color-muted);
  font-size: 0.875rem;
}