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

html {
  scroll-behavior: smooth;
}

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  min-height: 100vh;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition-base), color var(--transition-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Focus Styles for Accessibility */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) var(--space-lg);
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: Verdana, Geneva, sans-serif;
  font-size: var(--font-size-xl);
  font-weight: bold;
  font-style: italic;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Theme Toggle Button */
.theme-toggle {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--space-xs) var(--space-sm);
  cursor: pointer;
  font-size: var(--font-size-lg);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-text);
}

.theme-toggle:hover {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
  transform: translateY(-1px);
}

.theme-toggle:active {
  transform: translateY(0);
}

/* Main Content */
.main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-lg);
}

/* Sections */
.section {
  padding: var(--space-3xl) 0;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.section.visible {
  opacity: 1;
  transform: translateY(0);
}

.section:first-child {
  padding-top: var(--space-2xl);
}

/* Section Headers */
.section-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-lg);
  line-height: var(--line-height-tight);
}

.section-content {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
}

/* About Section */
.about-text {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.about-text:last-child {
  margin-bottom: 0;
}

/* Accordion */
.accordion {
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background: var(--color-bg-secondary);
  overflow: hidden;
  transition: all var(--transition-base);
}

.accordion:hover {
  box-shadow: var(--shadow-md);
}

.accordion-header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg);
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  transition: background-color var(--transition-fast);
}

.accordion-header:hover {
  background: var(--color-bg);
}

.accordion-header:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
}

.accordion-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  margin: 0;
}

.accordion-icon {
  width: 24px;
  height: 24px;
  stroke: var(--color-accent);
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.accordion-header[aria-expanded="true"] .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow) ease-out;
}

.accordion-content.expanded {
  max-height: 1000px;
  transition: max-height var(--transition-slow) ease-in;
}

.accordion-body {
  padding: 0 var(--space-lg) var(--space-lg);
}

/* Services Section */
.services-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.service-item {
  padding: var(--space-lg);
  background: var(--color-bg-secondary);
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.service-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
}

.service-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.service-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-sm);
  display: block;
  color: var(--color-accent);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.service-item:hover .service-icon {
  color: var(--color-accent-hover);
  transform: scale(1.1);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Contact Section */
.contact {
  background: var(--color-bg-secondary);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  margin-top: var(--space-xl);
}

.contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-lg);
}

.contact-label {
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  min-width: 100px;
}

.contact-value {
  color: var(--color-text-secondary);
}

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

.contact-value a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

/* Footer */
.footer {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  margin-top: var(--space-3xl);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* Responsive Design */
@media (max-width: 768px) {
  .header {
    padding: var(--space-sm) var(--space-md);
  }

  .main {
    padding: var(--space-md);
  }

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

  .services-list {
    grid-template-columns: 1fr;
  }

  .contact {
    padding: var(--space-lg);
  }

  .contact-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .contact-label {
    min-width: auto;
  }
}

/* Print Styles */
@media print {
  .header,
  .theme-toggle {
    display: none;
  }

  .section {
    page-break-inside: avoid;
  }
}