/* ==========================================================================
   Wyzela LLC - Patent Agent Practice Website
   CSS Custom Properties and Base Styles
   ========================================================================== */

:root {
  /* Colors - Professional dark blue palette */
  --color-primary: #1a365d;
  --color-accent: #2563eb;
  --color-text: #1f2937;
  --color-muted: #6b7280;
  --color-background: #ffffff;
  --color-light-gray: #f3f4f6;
  --color-white: #ffffff;

  /* Typography */
  --font-heading: 'Georgia', 'Times New Roman', serif;
  --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-section: 4rem;

  /* Layout */
  --max-width: 1200px;
  --header-height: 70px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
}

/* ==========================================================================
   Reset and Base Styles
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
}

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

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

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

/* ==========================================================================
   Utility Classes
   ========================================================================== */

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

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

.section--alt {
  background-color: var(--color-light-gray);
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   Typography (T007)
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: 1.25rem;
}

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

.lead {
  font-size: 1.125rem;
  color: var(--color-muted);
}

/* ==========================================================================
   Header & Navigation (T008)
   ========================================================================== */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  height: var(--header-height);
}

.header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header__logo {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.header__logo:hover {
  color: var(--color-primary);
}

/* Mobile menu toggle button */
.header__menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.header__menu-icon {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  position: relative;
  transition: background-color var(--transition-fast);
}

.header__menu-icon::before,
.header__menu-icon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.header__menu-icon::before {
  top: -7px;
}

.header__menu-icon::after {
  top: 7px;
}

/* Mobile menu open state */
.header__menu-toggle[aria-expanded="true"] .header__menu-icon {
  background-color: transparent;
}

.header__menu-toggle[aria-expanded="true"] .header__menu-icon::before {
  transform: rotate(45deg) translate(5px, 5px);
}

.header__menu-toggle[aria-expanded="true"] .header__menu-icon::after {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Navigation */
.header__nav {
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background-color: var(--color-white);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.header__nav.is-open {
  max-height: 400px;
}

.header__nav-list {
  list-style: none;
  padding: var(--spacing-sm);
}

.header__nav-list li {
  margin-bottom: var(--spacing-xs);
}

.header__nav-link {
  display: block;
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--color-text);
  font-weight: 500;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  border-radius: 4px;
}

.header__nav-link:hover {
  color: var(--color-accent);
  background-color: var(--color-light-gray);
}

.header__nav-link--cta {
  background-color: var(--color-accent);
  color: var(--color-white);
  text-align: center;
  margin-top: var(--spacing-xs);
}

.header__nav-link--cta:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* ==========================================================================
   Responsive Breakpoints (T009)
   ========================================================================== */

/* Tablet: 768px and up */
@media (min-width: 768px) {
  :root {
    --spacing-section: 5rem;
  }

  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2rem;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  /* Header - tablet adjustments */
  .header__menu-toggle {
    display: none;
  }

  .header__nav {
    position: static;
    max-height: none;
    overflow: visible;
    box-shadow: none;
    background-color: transparent;
  }

  .header__nav-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0;
  }

  .header__nav-list li {
    margin-bottom: 0;
  }

  .header__nav-link {
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  .header__nav-link--cta {
    margin-top: 0;
    margin-left: var(--spacing-xs);
  }
}

/* Desktop: 1024px and up */
@media (min-width: 1024px) {
  :root {
    --spacing-section: 6rem;
  }

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  .container {
    padding: 0 var(--spacing-lg);
  }

  .header__nav-list {
    gap: var(--spacing-sm);
  }
}

/* ==========================================================================
   Hero Section (T015)
   ========================================================================== */

.hero {
  padding-top: calc(var(--spacing-section) + var(--header-height));
  padding-bottom: var(--spacing-section);
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.hero__content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero__title {
  font-size: 2.5rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.hero__tagline {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-style: italic;
}

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--color-muted);
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
  line-height: 1.7;
}

.hero__cta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  align-items: center;
}

@media (min-width: 768px) {
  .hero__title {
    font-size: 3rem;
  }

  .hero__tagline {
    font-size: 1.75rem;
  }

  .hero__cta {
    flex-direction: row;
    justify-content: center;
  }
}

@media (min-width: 1024px) {
  .hero__title {
    font-size: 3.5rem;
  }

  .hero__tagline {
    font-size: 2rem;
  }
}

/* ==========================================================================
   Value Proposition Section (T016)
   ========================================================================== */

.value__content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

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

.value__body {
  font-size: 1.125rem;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

.value__highlight {
  font-size: 1.125rem;
  color: var(--color-primary);
  padding: var(--spacing-md);
  background-color: var(--color-white);
  border-left: 4px solid var(--color-accent);
  text-align: left;
  margin: 0;
}

.value__highlight strong {
  color: var(--color-accent);
}

/* ==========================================================================
   Services Section (T017)
   ========================================================================== */

.services__heading {
  margin-bottom: var(--spacing-xl);
}

.services__grid {
  display: grid;
  gap: var(--spacing-lg);
}

.services__card {
  background-color: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.services__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.services__card-title {
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.services__card-text {
  color: var(--color-muted);
  margin-bottom: 0;
}

@media (min-width: 768px) {
  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .services__card:last-child {
    grid-column: 1 / -1;
    max-width: 50%;
    margin: 0 auto;
  }
}

@media (min-width: 1024px) {
  .services__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .services__card:last-child {
    grid-column: auto;
    max-width: none;
    margin: 0;
  }
}

/* ==========================================================================
   Audience Section (T018)
   ========================================================================== */

.audience__heading {
  margin-bottom: var(--spacing-xl);
}

.audience__grid {
  display: grid;
  gap: var(--spacing-lg);
}

.audience__card {
  background-color: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  border-top: 4px solid var(--color-accent);
}

.audience__card-title {
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.audience__card-text {
  color: var(--color-muted);
  margin-bottom: 0;
}

@media (min-width: 768px) {
  .audience__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .audience__card:last-child {
    grid-column: 1 / -1;
    max-width: 50%;
    margin: 0 auto;
  }
}

@media (min-width: 1024px) {
  .audience__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .audience__card:last-child {
    grid-column: auto;
    max-width: none;
    margin: 0;
  }
}

/* ==========================================================================
   Buttons (T023)
   ========================================================================== */

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  border-radius: 6px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}

.btn--primary:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

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

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

.btn--large {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1.125rem;
}

.btn:focus {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* ==========================================================================
   Final CTA Section (T024)
   ========================================================================== */

.cta {
  background-color: var(--color-primary);
}

.cta__content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.cta__heading {
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
}

.cta__text {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-lg);
}

.cta__buttons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.cta .btn--primary {
  background-color: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
}

.cta .btn--primary:hover {
  background-color: var(--color-light-gray);
  border-color: var(--color-light-gray);
}

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

.cta .btn--secondary:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
}

.cta__email {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
  margin-bottom: 0;
}

.cta__email a {
  color: var(--color-white);
  text-decoration: underline;
}

.cta__email a:hover {
  color: var(--color-light-gray);
}

@media (min-width: 768px) {
  .cta__buttons {
    flex-direction: row;
    justify-content: center;
  }
}

/* ==========================================================================
   Why Wyzela Section (T028)
   ========================================================================== */

.why__heading {
  margin-bottom: var(--spacing-xl);
}

.why__grid {
  max-width: 700px;
  margin: 0 auto var(--spacing-lg);
}

.why__list {
  list-style: none;
  padding: 0;
}

.why__item {
  position: relative;
  padding: var(--spacing-sm) 0 var(--spacing-sm) var(--spacing-xl);
  border-bottom: 1px solid var(--color-light-gray);
  font-size: 1.0625rem;
}

.why__item:last-child {
  border-bottom: none;
}

.why__item::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: var(--spacing-sm);
  color: var(--color-accent);
  font-weight: bold;
  font-size: 1.25rem;
}

.why__note {
  text-align: center;
  font-style: italic;
  color: var(--color-muted);
  max-width: 600px;
  margin: 0 auto;
  padding: var(--spacing-md);
  background-color: var(--color-light-gray);
  border-radius: 8px;
}

/* ==========================================================================
   Process Section (T026)
   ========================================================================== */

.process__heading {
  margin-bottom: var(--spacing-xl);
}

.process__timeline {
  display: grid;
  gap: var(--spacing-lg);
  max-width: 800px;
  margin: 0 auto;
}

.process__step {
  background-color: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  position: relative;
  padding-left: calc(var(--spacing-lg) + 60px);
}

.process__step-number {
  position: absolute;
  left: var(--spacing-lg);
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  background-color: var(--color-accent);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: bold;
}

.process__step-title {
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.process__step-text {
  color: var(--color-muted);
  margin-bottom: 0;
}

@media (min-width: 768px) {
  .process__timeline {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .process__timeline {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
  }

  .process__step {
    padding: var(--spacing-lg) var(--spacing-md);
    padding-top: calc(var(--spacing-lg) + 50px);
    text-align: center;
  }

  .process__step-number {
    left: 50%;
    top: var(--spacing-md);
    transform: translateX(-50%);
  }
}

/* ==========================================================================
   Footer (T030)
   ========================================================================== */

.footer {
  background-color: var(--color-primary);
  padding: var(--spacing-xl) 0;
}

.footer__content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.footer__brand {
  text-align: center;
}

.footer__company {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: bold;
  color: var(--color-white);
  margin-bottom: var(--spacing-xs);
}

.footer__copyright {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  margin-bottom: 0;
}

.footer__disclaimer {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.footer__disclaimer p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.8rem;
  line-height: 1.6;
  max-width: 800px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .footer__content {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }

  .footer__brand {
    text-align: left;
  }

  .footer__disclaimer {
    text-align: right;
    padding-top: 0;
    border-top: none;
    flex: 1;
    max-width: 60%;
  }

  .footer__disclaimer p {
    margin: 0 0 0 auto;
  }
}

/* ==========================================================================
   Accessibility - Skip Link (T033)
   ========================================================================== */

.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 0 0 8px 8px;
  z-index: 1000;
  text-decoration: none;
  font-weight: 600;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* ==========================================================================
   Accessibility - Focus States (T035)
   ========================================================================== */

/* Enhanced focus styles for keyboard navigation */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Remove outline for mouse users, keep for keyboard */
a:focus:not(:focus-visible),
button:focus:not(:focus-visible) {
  outline: none;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* High contrast focus for header nav links */
.header__nav-link:focus {
  background-color: var(--color-light-gray);
  outline: 2px solid var(--color-accent);
}

/* Cards focus state */
.services__card:focus-within,
.audience__card:focus-within {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Process steps focus */
.process__step:focus-within {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Footer links focus */
.footer a:focus {
  outline-color: var(--color-white);
}

/* CTA section links focus */
.cta a:focus {
  outline-color: var(--color-white);
}