@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;500;600;700&display=swap');

:root {
  --primary-blue: #007AFF;
  --secondary-blue: #D6E8FF;
  --dark-text: #222222;
  --light-text: #666666;
  --background-color: #F8F8F8;
  --card-background: #FFFFFF;
  --border-color: #EFEFEF;
  --shadow-color: rgba(0, 0, 0, 0.05);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --dark-background: #111827;
  --dark-card-background: #1F2937;
  --dark-text-color: #E5E7EB;
  --dark-light-text: #9CA3AF;
  --dark-border-color: #374151;
  --dark-shadow-color: rgba(0, 0, 0, 0.2);
  --dark-blue-accent: #3B82F6;
  --dark-secondary-blue-accent: #60A5FA;
  --glow: 0 0 12px var(--primary-blue);
  --error-red: #E53E3E;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

*:focus,
*:focus-visible,
*:focus-within {
  outline: none !important;
  box-shadow: none !important;
}

select:focus,
#url:focus {
  border-color: var(--primary-blue) !important;
  box-shadow: 0 0 8px var(--secondary-blue) !important;
}

::-webkit-scrollbar {
  width: 0 !important;
  height: 0 !important;
}
body {
  font-family: 'Poppins', sans-serif;
  background: var(--background-color);
  color: var(--dark-text);
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
  transition: background-color 0.4s ease, color 0.4s ease;
}

#file {
  display: none;
}

#loading-screen {
  position: fixed;
  inset: 0;
  background: var(--card-background);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1rem;
  animation: fadeIn 0.3s ease;
}
.loading-spinner-large {
  width: 44px;
  height: 44px;
  border: 4px solid rgba(0, 122, 255, 0.2);
  border-top-color: var(--primary-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
.loading-text {
  font-weight: 500;
  color: var(--dark-text);
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.sidebar {
  width: 240px;
  background: var(--card-background);
  box-shadow: 2px 0 20px var(--shadow-color);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: background-color 0.4s ease;
  min-height: 100vh;
}
.logo-box {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  overflow: hidden;
  background: var(--background-color);
  display: grid;
  place-items: center;
  box-shadow: 0 0 0 3px var(--primary-blue), var(--glow);
  transition: var(--transition);
  margin-bottom: 8px;
}
.logo-box:hover {
  transform: rotate(10deg);
}
.logo-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.sidebar a {
  color: var(--light-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  padding: 10px 14px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: var(--transition);
  outline: none; 
}
.sidebar a:hover {
  background: var(--secondary-blue);
  color: var(--primary-blue);
  transform: translateX(6px);
}
.sidebar a svg {
  width: 20px;
  height: 20px;
  fill: var(--light-text);
  transition: fill 0.3s ease;
  flex-shrink: 0;
}
.sidebar a:hover svg {
  fill: var(--primary-blue);
}
.sidebar a span {
  transition: color 0.3s ease;
}

.sidebar a.active {
  background: var(--secondary-blue);
  color: var(--primary-blue);
  font-weight: 600;
}
.sidebar a.active svg {
  fill: var(--primary-blue);
}

main {
  flex: 1;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

main.page-text {
  align-items: flex-start;
}
main.page-text h1,
main.page-text p,
main.page-text h2,
main.page-text ul,
main.page-text ol,
main.page-text pre {
  width: 100%;
  max-width: 440px;
  text-align: left;
  margin-left: auto;
  margin-right: auto;
  animation: slideUpFade 0.6s ease-out;
}
main.page-text p,
main.page-text ul,
main.page-text ol {
  animation-delay: 0.1s;
}
@keyframes slideUpFade {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
main.page-text h1 {
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--dark-text);
}
main.page-text p {
  margin-bottom: 12px;
  font-size: 1rem;
  color: var(--light-text);
  line-height: 1.6;
}
main.page-text p strong {
  color: var(--dark-text);
  font-weight: 600;
}

main.page-text h2 {
  font-weight: 600;
  margin-top: 28px;
  margin-bottom: 12px;
  color: var(--dark-text);
  animation-delay: 0.15s;
}
main.page-text code {
  background: var(--secondary-blue);
  color: var(--primary-blue);
  padding: 3px 6px;
  border-radius: 6px;
  font-family: monospace;
  font-size: 0.9rem;
}
main.page-text p code {
  font-size: 0.95rem;
}
main.page-text pre {
  background: var(--background-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px;
  overflow-x: auto;
  font-family: monospace;
  font-size: 0.9rem;
  margin-top: 8px;
  margin-bottom: 16px;
  animation-delay: 0.2s;
}
main.page-text ul,
main.page-text ol {
  margin-left: 20px;
  margin-bottom: 16px;
  line-height: 1.7;
  color: var(--light-text);
}
main.page-text ul li {
  margin-bottom: 8px;
}
main.page-text ul li::marker {
  color: var(--primary-blue);
  font-weight: 600;
}


main:not(.page-text) h1,
main:not(.page-text) > p {
  text-align: center;
  transition: color 0.4s ease;
}
main:not(.page-text) h1 {
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--dark-text);
}
main:not(.page-text) > p {
  margin-bottom: 16px;
  font-size: 1rem;
  color: var(--light-text);
  line-height: 1.6;
}

#upload-box {
  background: var(--card-background);
  padding: 28px;
  border-radius: 20px;
  width: 100%;
  max-width: 440px;
  box-shadow: 0 8px 30px var(--shadow-color);
  transition: var(--transition);
  backdrop-filter: blur(4px);
  animation: slideUpFade 0.6s ease-out;
  position: relative;
  overflow: hidden;
}
#upload-box:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 35px var(--shadow-color);
}
label {
  font-size: 0.95rem;
  color: var(--light-text);
  margin-bottom: 8px;
  display: block;
}
select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  margin-bottom: 20px;
  background: var(--background-color);
  color: var(--dark-text);
  font-family: inherit;
  -webkit-appearance: none;
  appearance: none;
  outline: none;
  transition: var(--transition), border-color 0.3s ease, box-shadow 0.3s ease;
}
#drop {
  border: 2px dashed var(--border-color);
  border-radius: 16px;
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--light-text);
}
#drop svg {
  width: 48px;
  height: 48px;
  fill: var(--light-text);
  transition: var(--transition);
}
#drop:active {
  transform: scale(0.98);
}
#drop.drag {
  border-color: var(--primary-blue);
  transform: scale(1.02);
  box-shadow: 0 0 20px var(--secondary-blue);
}
#drop.drag svg {
  fill: var(--primary-blue);
  transform: scale(1.1);
}
.browse-link {
  color: var(--primary-blue);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
}
.browse-link:hover {
  text-decoration: underline;
}

.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  z-index: 10;
  transition: opacity 0.3s ease;
}
.loading-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}
.loading-spinner {
  width: 32px;
  height: 32px;
  border: 4px solid rgba(0, 122, 255, 0.2);
  border-top-color: var(--primary-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
.loading-overlay p {
  font-weight: 500;
  color: var(--dark-text);
}


#result {
  background: var(--card-background);
  padding: 28px;
  border-radius: 20px;
  width: 100%;
  max-width: 440px;
  margin-top: 32px;
  text-align: center;
  box-shadow: 0 8px 30px var(--shadow-color);
  transition: background-color 0.4s ease, opacity 0.3s ease;
  animation: popIn 0.5s ease-out;
}
@keyframes popIn {
  0% { transform: scale(0.9); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}
#result.hidden {
  display: none;
}
.check {
  width: 64px;
  margin-bottom: 16px;
  animation: checkBounce 0.6s ease-out;
}
@keyframes checkBounce {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.15); }
}
#url {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  margin: 16px 0;
  background: var(--background-color);
  color: var(--dark-text);
  font-family: monospace;
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition), border-color 0.3s ease, box-shadow 0.3s ease;
}

button {
  background: var(--primary-blue);
  color: #fff;
  border: none;
  padding: 10px 22px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  outline: none; 
}
button:hover {
  background: var(--dark-text);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}
button:active {
  transform: scale(0.98) translateY(-1px);
}

#list {
  margin-top: 32px;
  width: 100%;
  max-width: 440px;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.list-loader {
  text-align: center;
  color: var(--light-text);
  padding: 20px;
  font-weight: 500;
  animation: pulse 1.5s infinite ease-in-out;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
.item {
  background: var(--card-background);
  padding: 16px 20px;
  border-radius: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 4px 12px var(--shadow-color);
  transition: var(--transition);
  animation: slideUp 0.5s ease-out;
  animation-fill-mode: both;
}
.item:nth-child(1) { animation-delay: 0.05s; }
.item:nth-child(2) { animation-delay: 0.1s; }
.item:nth-child(3) { animation-delay: 0.15s; }
@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.item:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}
.item a {
  color: var(--primary-blue);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  outline: none; 
  border-radius: 4px;
}
.item a:hover {
  color: var(--dark-text);
}
small {
  color: var(--light-text);
  font-size: 0.85rem;
}

.theme-switcher {
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.theme-switcher svg {
  width: 20px;
  height: 20px;
  transition: fill 0.3s ease;
}
.theme-switcher .sun-icon { fill: #f39c12; }
.theme-switcher .moon-icon { fill: var(--light-text); }
.switch { position: relative; display: inline-block; width: 44px; height: 24px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0;
  background-color: #ccc; transition: .4s; border-radius: 24px;
}
.slider:before {
  position: absolute; content: ""; height: 18px; width: 18px; left: 3px; bottom: 3px;
  background-color: white; transition: .4s; border-radius: 50%;
}
input:checked + .slider { background-color: var(--primary-blue); }
input:checked + .slider:before { transform: translateX(20px); }


body.dark-mode {
  background: var(--dark-background);
  color: var(--dark-text-color);
}
body.dark-mode .sidebar,
body.dark-mode #upload-box,
body.dark-mode #result,
body.dark-mode .item {
  background: var(--dark-card-background);
  box-shadow: 0 8px 30px var(--dark-shadow-color);
}
body.dark-mode .logo-box {
  background: var(--dark-border-color);
  box-shadow: 0 0 0 3px var(--dark-blue-accent), 0 0 16px var(--dark-blue-accent);
}
body.dark-mode main h1 {
  color: var(--dark-text-color);
}
body.dark-mode main > p,
body.dark-mode small,
body.dark-mode label,
body.dark-mode .list-loader {
  color: var(--dark-light-text);
}
body.dark-mode main p strong {
  color: var(--dark-text-color);
}
body.dark-mode #url,
body.dark-mode select,
body.dark-mode #drop {
  background: var(--dark-background);
  border-color: var(--dark-border-color);
  color: var(--dark-text-color);
}
body.dark-mode a:hover {
  color: var(--dark-blue-accent);
}
body.dark-mode .sidebar a:hover {
  background: var(--dark-border-color);
  color: var(--dark-blue-accent);
}
body.dark-mode .sidebar a:hover svg {
  fill: var(--dark-blue-accent);
}
body.dark-mode .sidebar a.active {
  background: var(--dark-border-color);
  color: var(--dark-blue-accent);
}
body.dark-mode .sidebar a.active svg {
  fill: var(--dark-blue-accent);
}
body.dark-mode #drop.drag {
  border-color: var(--dark-blue-accent);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.5);
}
body.dark-mode #drop.drag svg {
  fill: var(--dark-blue-accent);
}
body.dark-mode .browse-link {
  color: var(--dark-blue-accent);
}
body.dark-mode button:hover {
  background: var(--dark-blue-accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}
body.dark-mode select:focus,
body.dark-mode #url:focus {
  border-color: var(--dark-blue-accent) !important;
  box-shadow: 0 0 8px rgba(59, 130, 246, 0.3) !important;
}

body.dark-mode .loading-overlay {
  background: rgba(31, 41, 55, 0.9);
}
body.dark-mode .loading-overlay p {
  color: var(--dark-text-color);
}
body.dark-mode .loading-spinner {
  border-color: rgba(59, 130, 246, 0.2);
  border-top-color: var(--dark-blue-accent);
}

body.dark-mode main.page-text h1,
body.dark-mode main.page-text h2 {
  color: var(--dark-text-color);
}
body.dark-mode main.page-text p,
body.dark-mode main.page-text ul,
body.dark-mode main.page-text ol {
  color: var(--dark-light-text);
}
body.dark-mode main.page-text code {
  background: var(--dark-border-color);
  color: var(--dark-blue-accent);
}
body.dark-mode main.page-text pre {
  background: var(--dark-background);
  border-color: var(--dark-border-color);
  color: var(--dark-light-text);
}
body.dark-mode main.page-text ul li::marker {
  color: var(--dark-blue-accent);
}


body.dark-mode .theme-switcher { border-top-color: var(--dark-border-color); }
body.dark-mode .theme-switcher .sun-icon { fill: var(--dark-light-text); }
body.dark-mode .theme-switcher .moon-icon { fill: var(--dark-blue-accent); }
body.dark-mode input:checked + .slider { background-color: var(--dark-blue-accent); }


#toast-container {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  z-index: 10000;
}
.toast {
  background: var(--dark-text);
  color: #fff;
  padding: 12px 20px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  font-weight: 500;
  font-size: 0.95rem;
  animation: toastIn 0.4s ease-out;
  transition: transform 0.4s ease, opacity 0.4s ease;
}
.toast.hide {
  animation: toastOut 0.5s ease-in forwards;
}
.toast.error {
  background: var(--error-red);
  color: #fff;
}
@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes toastOut {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(20px);
  }
}

@media (max-width: 600px) {
  body { flex-direction: column; }
  .sidebar {
    width: 100%;
    flex-direction: row;
    padding: 12px 16px;
    gap: 10px;
    align-items: center; 
    min-height: auto;
  }
  .logo-box {
    margin-right: auto;
    margin-bottom: 0;
  }
  .sidebar a {
    padding: 8px 10px;
  }
  .sidebar a span {
    display: none;
  }
  .sidebar a svg {
    width: 22px;
    height: 22px;
  }
  .logo-box { width: 48px; height: 48px; }
  main { padding: 24px 16px; } 
  
  main.page-text h1,
  main.page-text p,
  main.page-text h2,
  main.page-text ul,
  main.page-text ol,
  main.page-text pre {
    margin-left: 0;
    margin-right: 0;
  }

  main h1 { font-size: 1.5rem; }
  main > p { margin-bottom: 10px; }
  
  #upload-box, #result { padding: 20px; }
  #drop { padding: 24px; }
  #list { margin-top: 24px; }
  
  .theme-switcher {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
    margin-left: 10px;
  }
}