.theme-switcher {
  position: absolute;
  top: 20px;
  right: 20px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  color: var(--color-text-primary);
  z-index: 100;
}

.theme-switcher:hover {
  transform: scale(1.1);
}

body {
  font-family: var(--font-family-main);
  background: var(--color-background);
  color: var(--color-text-primary);
  line-height: 1.6;
  display: flex;
  justify-content: center;
  padding: 2rem;
  min-height: 100dvh;
  height: unset;
}

#spec-container {
  background: var(--color-content-bg);
  box-shadow: var(--box-shadow-main);
  max-width: 1200px;
  width: 100%;
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: fit-content;
}

#content {
  padding: 2rem 3rem;
  display: flex;
  flex-direction: column;
  height: 100%;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

.logo-container {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
}

.logo {
  width: 80px;
  height: auto;
  margin-bottom: 1rem;
}

.dark-logo {
  display: none;
}

.light-logo {
  display: block;
}

[data-theme="dark"] .dark-logo {
  display: block;
}

[data-theme="dark"] .light-logo {
  display: none;
}

h1 {
  font-size: var(--font-size-h1);
  color: var(--color-text-primary);
  margin-bottom: 0.5rem;
}

main.length-main {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
  justify-content: space-between;
}

/* Left section (converter + info) */
.left-section {
  flex: 1 1 500px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Converter box */
.converter {
  background-color: var(--color-info-bg);
  color: var(--color-text-primary);
  border-radius: 12px;
  padding: 1.8rem 2rem;
  box-shadow: 0 4px 12px rgba(52, 152, 219, 0.1);
}

.converter h2 {
  color: var(--color-text-primary);
  margin-bottom: 1.2rem;
  font-weight: 700;
  font-size: 1.8rem;
  text-align: center;
}

.converter-row {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  align-items: center;
}

.converter-row:last-child {
  margin-bottom: 0;
}

.converter-row input[type="number"] {
  background: var(--color-input-bg);
  color: var(--color-text-primary);
  border: 2px solid var(--color-input-border);
  flex: 1;
  padding: 0.6rem 1rem;
  font-size: 1.1rem;
  border-radius: 8px;
  transition: border-color 0.3s ease;
  outline-offset: 2px;
}

.converter-row input[type="number"]:focus {
  border-color: var(--color-input-focus);
  box-shadow: 0 0 6px var(--color-button-shadow);
  outline: none;
  background: #fff;
  color: #000
}

.converter-row input[type="number"][readonly] {
  background-color: #e9ecef;
  cursor: not-allowed;
  color: #666;
}

.converter-row select {
  background: var(--color-input-bg);
  color: var(--color-text-primary);
  border: 2px solid var(--color-input-border);
  width: 210px;
  padding: 0.6rem 1rem;
  font-size: 1.1rem;
  border-radius: 8px;
  transition: border-color 0.3s ease;
  cursor: pointer;
}

.converter-row select:focus {
  border-color: var(--color-input-focus);
  box-shadow: 0 0 6px var(--color-button-shadow);
  outline: none;
}

/* Info sections */
.info-section {
  background-color: var(--color-info-bg);
  color: var(--color-text-primary);
  border-radius: 12px;
  padding: 1.5rem 2rem;
  box-shadow: 0 4px 12px rgba(52, 152, 219, 0.08);
  font-weight: 500;
}

.info-section h3 {
  color: var(--color-text-primary);
  margin-bottom: 0.8rem;
  font-weight: 700;
  font-size: 1.4rem;
}

.info-section p,
.info-section ul {
  font-size: 1rem;
  line-height: 1.5;
}

.info-section p:not(:last-child) {
  margin-bottom: 1rem;
}

.info-section ul {
  list-style-type: disc;
  padding-left: 1.2rem;
}

.info-section ul li {
  margin-bottom: 0.4rem;
}

/* Right navigation */
.right-nav {
  flex: 0 0 320px;
  background-color: var(--color-nav-bg);
  border-radius: 12px;
  padding: 1.8rem 1.5rem;
  color: white;
  box-shadow: 0 8px 20px rgba(52, 152, 219, 0.3);
  display: flex;
  flex-direction: column;
  height: fit-content;
}

.right-nav h3 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 1rem;
  border-bottom: 2px solid rgba(255, 255, 255, 0.4);
  padding-bottom: 0.4rem;
}

.right-nav a {
  color: white;
  text-decoration: none;
  font-weight: 600;
  padding: 0.5rem;
  border-radius: 6px;
  transition: background-color 0.3s ease;
}

.right-nav a:hover,
.right-nav a:focus {
  background-color: rgba(255, 255, 255, 0.2);
  outline: none;
}

/* Footer */
footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid #e1e4e8;
  text-align: center;
  font-size: 0.9rem;
  color: #999;
  font-weight: 500;
}

/* Responsive */
@media (max-width: 900px) {
  main.length-main {
    flex-direction: column;
  }

  .right-nav {
    flex: none;
    width: 100%;
    padding: 1.5rem 1rem;
    margin-top: 2rem;
  }

  .left-section {
    flex: none;
  }
}

@media (max-width: 480px) {
  #content {
    padding: 1.5rem 1.5rem;
  }

  header h1 {
    font-size: 2rem;
  }

  .converter h2 {
    font-size: 1.5rem;
  }

  .converter-row select {
    width: 140px;
    font-size: 1rem;
  }

  .converter-row input[type="number"] {
    font-size: 1rem;
  }

  .right-nav h3 {
    font-size: 1.3rem;
  }

  main.length-main {
    gap: unset
  }

  .logo-container {
    margin-top: 1rem;
    margin-bottom: 0.5rem;
  }
}

/* Medium screens (tablets, small laptops) */
@media (max-width: 900px) {
  main.length-main {
    flex-direction: column;
  }

  .left-section {
    flex: none;
    width: 100%;
  }

  .right-nav {
    flex: none;
    width: 100%;
    margin-top: 2rem;
    padding: 1.5rem 1rem;
  }
}

/* Switch button container */
.switch-button-container {
  /* display: flex; */
  display: none;
  justify-content: center;
  margin: 1rem 0;
}

#switchButton {
  background-color: #3498db;
  border: none;
  color: white;
  font-size: 1.8rem;
  padding: 0.4rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 4px 8px rgba(52, 152, 219, 0.3);
  transition: background-color 0.3s ease, transform 0.2s ease;
  user-select: none;
}

#switchButton:hover,
#switchButton:focus {
  background-color: #2980b9;
  outline: none;
  transform: scale(1.1);
}

#switchButton:active {
  transform: scale(1);
}

/* Small screens (mobile phones) */
@media (max-width: 480px) {
  body {
    padding: 0
  }

  #content {
    padding: 1rem 1rem;
  }

  header h1 {
    font-size: 1.8rem;
  }

  #logo {
    width: 60px;
  }

  .converter h2 {
    font-size: 1.3rem;
  }

  .converter-row {
    flex-direction: column;
    gap: 0.75rem;
  }

  .converter-row input[type="number"],
  .converter-row select {
    width: 100%;
    font-size: 1rem;
  }

  .right-nav {
    padding: 0;
  }

  .right-nav h3 {
    font-size: 1.2rem;
  }

  .right-nav a {
    font-size: 1rem;
    padding: 0.5rem;
  }
}

[data-theme="dark"] #spec-container {
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .converter-row input[type="number"][readonly] {
  background-color: var(--color-background);
}

[data-theme="dark"] .right-nav {
  background-color: var(--color-button-hover-bg);
}

/* Popular converters section */
.popular-converters {
  background-color: var(--color-info-bg);
  color: var(--color-text-primary);
  border-radius: 12px;
  padding: 1.5rem 2rem;
  box-shadow: 0 4px 12px rgba(52, 152, 219, 0.08);
}

.popular-converters h3 {
  color: var(--color-text-primary);
  margin-bottom: 1rem;
  font-weight: 700;
  font-size: 1.4rem;
}

.converter-links {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 0.8rem;
}

.converter-link {
  display: block;
  padding: 0.8rem 1rem;
  background-color: var(--color-button-bg);
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 500;
  transition: background-color 0.3s ease, transform 0.2s ease;
  text-align: center;
}

.converter-link:hover,
.converter-link:focus {
  background-color: var(--color-button-hover);
  transform: translateY(-2px);
  outline: none;
}

/* Mobile Navigation */
.mobile-nav-container {
  display: none;
  position: relative;
  width: 100%;
}

.burger-menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-nav-bg);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.75rem 1rem;
  cursor: pointer;
  font-weight: 600;
  margin-bottom: 1rem;
}

.burger-menu span:not(.menu-text) {
  display: block;
  width: 22px;
  height: 2px;
  background: white;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.burger-menu .menu-text {
  font-size: 1rem;
}

.right-nav.mobile-nav {
  position: absolute;
  top: 7px;
  left: 0;
  width: 100%;
  background: var(--color-nav-bg);
  border-radius: 0 0 12px 12px;
  z-index: 100;
  overflow: hidden;
  transform: translateY(-10px);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.right-nav.mobile-nav.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.right-nav.mobile-nav .nav-content {
  padding: 1rem;
}

/* Desktop Navigation */
.right-nav.desktop-nav {
  display: block;
}

.right-nav.mobile-nav .nav-content,
.right-nav.desktop-nav .nav-content {
  display: flex;
  flex-direction: column;
}

/* Active link styling - for both mobile and desktop */
.right-nav a.active {
  background-color: rgba(255, 255, 255, 0.3);
  pointer-events: none;
  cursor: default;
}

.right-nav a.active:hover {
  background-color: rgba(255, 255, 255, 0.3);
}

/* Responsive styles */
@media (max-width: 900px) {
  .mobile-nav-container {
    display: block;
  }

  .right-nav.desktop-nav {
    display: none;
  }

  .burger-menu.active span:first-child {
    transform: translateY(10px) rotate(45deg);
  }

  .burger-menu.active span:nth-child(2) {
    opacity: 0;
  }

  .burger-menu.active span:nth-child(3) {
    transform: translateY(-10px) rotate(-45deg);
  }
}

/* Dark mode adjustments */
[data-theme="dark"] .right-nav a.active {
  background-color: rgba(255, 255, 255, 0.2);
}