/* CSS Variables - Dark Mode Only */
:root {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-tertiary: #404040;
  --text-primary: #e8e8e8;
  --text-secondary: #b0b0b0;
  --border: #404040;
  --accent: #0056b3;
  --accent-hover: #004085;
  --error: #ff6b6b;
  --success: #51cf66;
}

/* Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Remove any default list styling and pseudo-elements */
ul, ol, li {
  list-style: none;
}

*::before,
*::after {
  list-style: none;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', system-ui, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding-top: 76px;
}

*:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  text-decoration: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header and Navigation */
.header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 0;
  gap: 1rem;
  position: relative;
  list-style: none;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.5px;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.logo__icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
}

.logo__text {
  color: var(--text-primary);
  font-weight: 800;
}

.logo:hover {
  transform: scale(1.05);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
  justify-content: flex-end;
  max-width: calc(100% - 200px);
  list-style: none;
}

.nav__link {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.2s ease;
  position: relative;
  padding: 0.5rem 1rem;
  border-radius: 6px;
}

.nav__link:hover {
  color: var(--text-primary);
  background-color: var(--bg-tertiary);
  transform: translateY(-1px);
  text-decoration: none;
}

/* Mobile Menu Toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 10px;
  z-index: 1001;
  position: relative;
  flex-shrink: 0;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  transition: background 0.2s ease;
}

.nav__toggle:hover {
  background: var(--bg-secondary);
}

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

.nav__toggle-bar {
  width: 26px;
  height: 3px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}

.nav__toggle.active .nav__toggle-bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav__toggle.active .nav__toggle-bar:nth-child(2) {
  opacity: 0;
  transform: scale(0);
}

.nav__toggle.active .nav__toggle-bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Language Switcher */
.nav__language-switcher {
  position: relative;
  margin-left: 0.5rem;
  display: inline-block;
}

.nav__lang-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.8rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.nav__lang-btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent);
}

.nav__lang-btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.nav__lang-code {
  font-size: 0.85rem;
  letter-spacing: 0.5px;
  display: inline-block;
}

.nav__lang-dropdown {
  position: absolute !important;
  top: 100%;
  right: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(0);
  transition: all 0.3s ease;
  min-width: 180px;
  z-index: 100;
  display: block !important;
  padding-top: 0.5rem;
  margin-top: -0.5rem;
}

.nav__language-switcher:hover .nav__lang-dropdown,
.nav__lang-dropdown:hover,
.nav__lang-dropdown.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav__lang-option {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.8rem 1rem;
  color: var(--text-primary);
  text-decoration: none;
  transition: background 0.2s ease;
  border-bottom: 1px solid var(--border);
}

.nav__lang-option:first-child {
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
}

.nav__lang-option:last-child {
  border-bottom: none;
  border-bottom-left-radius: 8px;
  border-bottom-right-radius: 8px;
}

.nav__lang-option:hover {
  background: var(--bg-tertiary);
}

.nav__lang-flag {
  font-size: 1.2rem;
  flex-shrink: 0;
}

.nav__lang-name {
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
}

/* Buttons */
.btn {
  padding: 0.7rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border: 2px solid transparent;
  border-radius: 8px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: inherit;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  text-decoration: none;
  display: inline-block;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: white;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
}

.btn--primary:hover {
  box-shadow: 0 6px 16px rgba(0, 123, 255, 0.4);
}

.btn--secondary {
  background: transparent;
  border: 2px solid var(--border);
}

.btn--secondary:hover {
  border-color: var(--accent);
  background: var(--bg-tertiary);
}

.btn--small {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

.btn--large {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
  border-radius: 12px;
}

.btn--icon {
  padding: 0.6rem;
  font-size: 1.3rem;
  background: transparent;
  border: none;
  border-radius: 50%;
  transition: all 0.3s ease;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn--icon:hover {
  background: var(--bg-tertiary);
  transform: rotate(20deg) scale(1.1);
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

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

.footer__text {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer__links {
  display: flex;
  gap: 1.5rem;
}

.footer__link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.footer__link:hover {
  color: var(--accent);
}

.footer__credit {
  text-align: center;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--text-primary);
}

.footer__credit-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease;
}

.footer__credit-link:hover {
  color: var(--accent-hover);
}

/* Toast Notification */
.toast {
  position: fixed;
  top: 6rem;
  right: 2rem;
  transform: translateX(400px);
  padding: 1.2rem 2rem;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 2px solid var(--accent);
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  pointer-events: none;
  z-index: 1000;
  font-weight: 600;
  font-size: 0.95rem;
  min-width: 300px;
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

/* Responsive Design - Mobile */
@media (max-width: 768px) {
  body {
    padding-top: 76px;
  }
  
  .container {
    padding: 0 20px;
  }
  
  .nav {
    padding: 1rem 0;
    position: relative;
    background: var(--bg-secondary);
  }
  
  .header {
    height: 76px;
    background: var(--bg-secondary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  
  /* Show hamburger menu button */
  .nav__toggle {
    display: flex;
    position: relative;
    margin-left: auto;
    z-index: 1050;
  }
  
  /* Hide nav links by default on mobile */
  .nav__links {
    position: fixed;
    top: 130px;
    left: 0;
    width: 100%;
    height: calc(100vh - 130px);
    background: var(--bg-primary);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 1rem 1rem 1.5rem 1rem;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    overflow: hidden;
    z-index: 500;
  }
  
  .nav__links.active {
    transform: translateX(0);
  }
  
  .nav__link {
    font-size: 1.05rem;
    padding: 0.875rem 0.75rem;
    width: 100%;
    border-bottom: none;
    text-align: left;
    display: block;
  }
  
  .nav__link:first-child {
    border-top: none;
  }
  
  .nav__link:hover, .nav__link:active {
    background: var(--bg-secondary);
    transition: background 0.2s ease;
  }
  
  .logo {
    font-size: 1.4rem;
  }
  
  .logo__icon {
    width: 28px;
    height: 28px;
  }
  
  /* Language Switcher Mobile Styles */
  .nav__language-switcher {
    margin-left: 0;
    margin-top: 1rem;
    width: 100%;
    border-top: none;
    padding-top: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
  }
  
  .nav__lang-btn {
    padding: 1rem 1.5rem;
    width: auto;
    min-width: 150px;
    justify-content: center;
    font-size: 1rem;
    border: 1px solid var(--border);
    border-radius: 0;
    background: var(--bg-secondary);
    position: relative;
  }
  
  .nav__lang-btn svg {
    width: 20px;
    height: 20px;
  }
  
  .nav__lang-code {
    font-size: 1rem;
  }
  
  .nav__lang-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    transform: none;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    padding: 0;
    margin-top: 0.5rem;
    width: 150px;
    display: none;
    max-height: 250px;
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 1001;
    -ms-overflow-style: none;
    scrollbar-width: none;
  }
  
  .nav__lang-dropdown::-webkit-scrollbar {
    display: none;  /* Chrome, Safari and Opera */
  }
  
  .nav__lang-dropdown.active {
    display: block;
  }
  
  .nav__lang-option {
    padding: 0.75rem;
    font-size: 0.95rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 0.75rem;
  }
  
  .nav__lang-option:last-child {
    border-bottom: none;
  }
  
  .nav__lang-option:hover, .nav__lang-option:active {
    background: var(--bg-primary);
  }
  
  .nav__lang-flag {
    font-size: 1.15rem;
  }
  
  .nav__lang-name {
    font-size: 1rem;
  }
  
  /* Footer Mobile Styles */
  .footer {
    padding: 1.5rem 0;
  }
  
  .footer__content {
    flex-direction: column;
    gap: 1.25rem;
    text-align: center;
    align-items: center;
  }
  
  .footer__text {
    font-size: 0.875rem;
    order: 2;
  }
  
  .footer__links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem 1rem;
    order: 1;
    max-width: 100%;
  }
  
  .footer__link {
    font-size: 0.875rem;
    padding: 0.25rem 0.5rem;
    display: inline-block;
  }
  
  .footer__credit {
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    font-size: 0.875rem;
    line-height: 1.6;
  }
  
  /* Button Mobile Adjustments */
  .btn {
    padding: 0.65rem 1.2rem;
    font-size: 0.9rem;
  }
  
  .btn--large {
    padding: 0.85rem 2rem;
    font-size: 1.05rem;
  }
  
  /* Toast Mobile Styles */
  .toast {
    top: 5rem;
    right: 1rem;
    left: 1rem;
    min-width: auto;
    padding: 1rem 1.5rem;
    font-size: 0.9rem;
    transform: translateX(0) translateY(-100px);
  }
  
  .toast.show {
    transform: translateX(0) translateY(0);
  }
}

@media (max-width: 640px) {
  /* Footer adjustments for medium-small screens */
  .footer__links {
    gap: 0.6rem 0.85rem;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    max-width: 400px;
  }
  
  .footer__link {
    font-size: 0.8125rem;
    padding: 0.35rem 0.4rem;
  }
}

@media (max-width: 480px) {
  body {
    padding-top: 60px;
  }
  
  .container {
    padding: 0 16px;
  }
  
  .nav {
    padding: 0.75rem 0;
  }
  
  .nav__links {
    top: 60px;
    height: calc(100vh - 60px);
    padding: 0.875rem;
  }
  
  .nav__link {
    font-size: 1rem;
    padding: 0.875rem 0;
  }
  
  .logo {
    font-size: 1.2rem;
  }
  
  .logo__icon {
    width: 24px;
    height: 24px;
  }
  
  .nav__lang-btn {
    padding: 0.875rem;
    font-size: 1rem;
  }
  
  .nav__lang-option {
    padding: 0.875rem;
    font-size: 0.9375rem;
  }
  
  /* Footer Extra Small Mobile */
  .footer {
    padding: 1.25rem 0;
  }
  
  .footer__content {
    gap: 1rem;
  }
  
  .footer__text {
    font-size: 0.8125rem;
    line-height: 1.5;
    order: 2;
  }
  
  .footer__links {
    gap: 0.5rem 0.75rem;
    order: 1;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    width: 100%;
    max-width: 300px;
  }
  
  .footer__link {
    font-size: 0.8125rem;
    padding: 0.4rem 0.3rem;
    text-align: center;
  }
  
  .footer__credit {
    margin-top: 1rem;
    padding-top: 1rem;
    font-size: 0.8125rem;
    line-height: 1.5;
  }
  
  /* Button Extra Small Mobile */
  .btn {
    padding: 0.6rem 1rem;
    font-size: 0.85rem;
  }
  
  .btn--small {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
  }
  
  .btn--large {
    padding: 0.8rem 1.8rem;
    font-size: 1rem;
  }
  
  /* Toast Extra Small Mobile */
  .toast {
    top: 4.5rem;
    padding: 0.85rem 1.25rem;
    font-size: 0.85rem;
  }
}

@media (max-width: 360px) {
  /* Footer for extra small screens (iPhone SE, small Android) */
  .footer__links {
    grid-template-columns: repeat(2, 1fr);
    max-width: 280px;
    gap: 0.4rem 0.6rem;
  }
  
  .footer__link {
    font-size: 0.75rem;
    padding: 0.35rem 0.25rem;
  }
  
  .footer__text {
    font-size: 0.75rem;
  }
  
  .footer__credit {
    font-size: 0.75rem;
  }
}

/* Ensure hamburger toggle doesn't appear on desktop */
@media (min-width: 769px) {
  .nav__toggle {
    display: none;
  }
  
  /* Keep header fixed and navbar positioned correctly */
  .header {
    position: fixed;
    top: 0;
    z-index: 1200;
    height: auto;
  }
  
  .nav {
    position: relative;
    z-index: 1200;
    padding: 1.2rem 0;
  }
  
  body {
    padding-top: 76px;
  }
  
  /* Desktop nav links should be visible and on top */
  .nav__links {
    position: static;
    transform: none;
    opacity: 1;
    z-index: 1190;
  }
}