:root {
  --primary-gradient: linear-gradient(135deg, #00d2ff 0%, #3a7bd5 100%);
  --bg-color: #0b0e14;
  --glass-bg: rgba(255, 255, 255, 0.05);
  --card-bg: rgba(255, 255, 255, 0.05);
  --glass-border: 1px solid rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --text-primary: #f8f9fa;
  --text-secondary: #adb5bd;
  --accent-color: #00d2ff;
  --success-color: #2ecc71;
  --menu-bg: rgba(11, 14, 20, 0.8);
  --input-bg: rgba(255, 255, 255, 0.05);
  --code-bg: rgba(0, 0, 0, 0.3);
}

body.light-theme {
  --bg-color: #f2f2f7; 
  --glass-bg: rgba(255, 255, 255, 0.6);
  --card-bg: rgba(255, 255, 255, 0.6);
  --glass-border: 1px solid rgba(255, 255, 255, 0.4);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.1);
  --text-primary: #1d1d1f;
  --text-secondary: #3a3a3c;
  --accent-color: #007aff;
  --menu-bg: rgba(255, 255, 255, 0.85);
  --input-bg: rgba(255, 255, 255, 0.5);
  --code-bg: rgba(255, 255, 255, 0.5);
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  font-size: 1.1rem;
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
  color: var(--text-primary);
  background-color: var(--bg-color);
  background-image:
    radial-gradient(at 0% 0%, rgba(58, 123, 213, 0.15) 0, transparent 50%),
    radial-gradient(at 100% 100%, rgba(0, 210, 255, 0.1) 0, transparent 50%);
  min-height: 100vh;
  text-align: center;
  transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3 {
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 24px;
}

h1, h2, h3 {
  text-align: center;
}

h2 {
  font-size: 2.2rem;
}

a {
  text-decoration: none;
  color: var(--accent-color);
  transition: all 0.2s ease;
}

a:hover {
  filter: brightness(1.2);
  text-decoration: underline;
}

.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 20px;
}

.container {
  max-width: 900px;
  margin: 0 auto;
}

.content-panel {
  text-align: right;
  display: block;
  max-width: 760px;
  margin: 20px auto;
  line-height: 1.9;
}

.content-panel p {
  line-height: 1.9;
}

.content-panel h2,
.content-panel h3 {
  text-align: right;
}

.section-heading {
  margin-bottom: 40px;
}

.navbar {
  position: sticky;
  top: 20px;
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 30px;
  margin-bottom: 40px;
}

.nav-links {
  display: flex;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 0;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--menu-bg);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: var(--glass-border);
  border-radius: 16px;
  flex-direction: column;
  align-items: center;
  padding: 20px;
  margin-top: 10px;
  opacity: 0;
  transform: translateY(-20px);
  pointer-events: none;
  transition: all 0.3s ease;
  width: 100%;
}

.nav-links.active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.nav-links li a {
  color: var(--text-secondary);
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 8px;
  transition: all 0.3s ease;
  display: inline-block;
  text-decoration: none;
}

.nav-links li a:hover,
.nav-links li a.active {
  background: var(--primary-gradient);
  color: #fff;
  box-shadow: 0 4px 15px rgba(0, 210, 255, 0.3);
  text-decoration: none;
}

.nav-links li a:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 3px;
}

.menu-toggle {
  display: flex;
  flex-direction: column;
  cursor: pointer;
  gap: 6px;
}

.bar {
  width: 25px;
  height: 3px;
  background-color: var(--text-primary);
  border-radius: 3px;
  transition: all 0.3s ease;
}

@media (max-width: 768px) {
  .nav-links li {
    width: 100%;
  }

  .nav-links li a {
    width: 100%;
    text-align: center;
  }

  .navbar {
    flex-wrap: wrap;
    justify-content: space-between; 
  }
}

.cta-button {
  display: inline-block;
  background: var(--glass-bg); 
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: var(--glass-border);
  color: var(--text-primary) !important;
  padding: 14px 28px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  box-shadow: var(--glass-shadow);
  transition: all 0.3s ease;
  text-decoration: none !important;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.cta-button.primary {
  background: var(--primary-gradient);
  color: #fff !important;
  border: none;
}

.cta-button.primary::before {
  opacity: 0;
}

.cta-button.ghost {
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.2);
}

.cta-button.compact {
  font-size: 0.95rem;
  padding: 10px 20px;
}

.cta-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--primary-gradient);
  opacity: 0.2; 
  z-index: -1;
  transition: opacity 0.3s ease;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(58, 123, 213, 0.4);
  border-color: var(--accent-color);
}

.cta-button:hover::before {
  opacity: 0.4;
}

.input-container {
  text-align: center;
  margin-bottom: 20px;
}

.input-container label {
  display: block;
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: var(--text-primary);
}

#username {
  width: 100%;
  max-width: 400px;
  padding: 15px;
  font-size: 1.2rem;
  background: var(--input-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: var(--glass-border);
  border-radius: 12px;
  color: var(--text-primary);
  text-align: center;
  transition: all 0.3s ease;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}

#username:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 15px rgba(0, 210, 255, 0.2);
  background: var(--glass-bg);
}

.code-box {
  position: relative;
  background: var(--code-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 15px;
  border-radius: 12px;
  border: var(--glass-border);
  margin: 20px auto;
  overflow: hidden;
  text-align: center;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}

.code-box pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-all;
  color: var(--accent-color);
  font-family: 'Courier New', monospace;
  font-weight: 600;
}

.copy-btn {
  background-color: var(--glass-bg);
  border: var(--glass-border);
  color: var(--text-primary);
  backdrop-filter: blur(5px);
  padding: 6px 16px;
  border-radius: 8px;
  font-weight: bold;
  cursor: pointer;
  margin-bottom: 10px;
  transition: all 0.2s;
}

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

.manual-box {
  text-align: right;
  background: rgba(255, 255, 255, 0.05);
  padding: 20px;
  border-radius: 16px;
  margin-top: 20px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.note-box {
  background: rgba(255, 255, 255, 0.05);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.form-container {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  padding: 30px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  max-width: 560px;
  margin: 30px auto;
  text-align: right;
}

.form-group {
  margin-bottom: 20px;
}

.form-container label {
  display: block;
  margin-bottom: 10px;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-container input {
  width: 100%;
  padding: 14px;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 1rem;
  box-sizing: border-box;
  direction: ltr;
}

.form-container input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 10px rgba(0, 210, 255, 0.2);
}

.help-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 8px;
}

.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(5px);
}

.modal-content {
  background-color: var(--bg-color);
  margin: 15% auto;
  padding: 24px;
  border: 1px solid var(--accent-color);
  width: 80%;
  max-width: 420px;
  border-radius: 16px;
  text-align: center;
  box-shadow: 0 0 30px rgba(0, 210, 255, 0.2);
}

.error-popup {
  color: #ff4444;
  margin-bottom: 16px;
  font-weight: 700;
}

.copy-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

.success-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  padding: 32px;
  border-radius: 20px;
  border: 1px solid rgba(46, 204, 113, 0.2);
  text-align: center;
  max-width: 640px;
  margin: 30px auto;
}

.share-url {
  background: rgba(0, 0, 0, 0.3);
  padding: 16px;
  border-radius: 12px;
  font-family: monospace;
  font-size: 1rem;
  margin: 20px 0;
  border: 1px solid rgba(255, 255, 255, 0.1);
  word-break: break-all;
  color: var(--accent-color);
  direction: ltr;
}

.contact-card {
  background: var(--card-bg);
  backdrop-filter: blur(15px);
  padding: 40px;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  max-width: 650px;
  margin: 40px auto;
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--primary-gradient);
}

.avatar {
  width: 100px;
  height: 100px;
  background: var(--primary-gradient);
  border-radius: 50%;
  margin: 0 auto 25px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: 800;
  color: white;
  box-shadow: 0 10px 20px rgba(58, 123, 213, 0.3);
}

.warning-box {
  background: rgba(255, 171, 0, 0.1);
  border: 1px solid rgba(255, 171, 0, 0.3);
  border-radius: 12px;
  padding: 18px;
  margin: 20px 0;
  text-align: right;
  color: #ffab00;
  font-size: 0.95rem;
}

.warning-title {
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
}

.warning-title::after {
  content: '⚠️';
  margin-right: 10px;
}

.experimental {
  margin-top: 30px;
  padding: 16px;
  background: rgba(255, 68, 68, 0.1);
  border-left: 4px solid #ff4444;
  border-radius: 8px;
  color: #ff8888;
  font-size: 0.9rem;
  text-align: right;
}

.ss-prominent-box {
  background: rgba(0, 210, 255, 0.1);
  border: 2px solid #00d2ff;
  border-radius: 12px;
  padding: 22px;
  margin: 30px auto;
  max-width: 700px;
  text-align: center;
}

.ss-prominent-box strong {
  display: block;
  font-size: 1.1rem;
  color: #00d2ff;
  margin-bottom: 12px;
}

.ss-copy-container {
  background: rgba(0, 0, 0, 0.3);
  padding: 12px;
  border-radius: 8px;
  margin: 15px 0;
}

.ss-copy-text {
  font-family: monospace;
  background: #222;
  padding: 8px;
  border-radius: 4px;
  color: #fff;
  cursor: pointer;
  word-break: break-all;
  display: block;
  font-size: 1rem;
  direction: ltr;
}

.ss-copy-text:hover {
  background: #333;
}

.error {
  color: #ff4444;
  font-size: 0.9rem;
  margin-top: 5px;
  display: none;
}

footer {
  margin-top: 60px;
  padding: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  text-align: right;
}

.download-card {
  padding: 18px;
}

.download-card h3 {
  margin: 0 0 12px 0;
  text-align: right;
}

.download-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.download-list li {
  margin-top: 10px;
}

.download-list li:first-child {
  margin-top: 0;
}

.text-right { text-align: right; }
.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color); 
}
 
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2); 
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.4); 
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.8s ease-out forwards;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: transform 0.3s ease, background-color 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background-color: var(--glass-bg);
    transform: rotate(15deg);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    stroke: var(--text-primary);
}

.neon-hr {
    border: none;
    height: 2px;
    margin: 30px 0;
    background: linear-gradient(
        90deg,
        rgba(0,210,255,0) 0%,
        rgba(0,210,255,0.6) 50%,
        rgba(0,210,255,0) 100%
    );
    box-shadow: 0 0 4px rgba(0,210,255,0.35),
                0 0 6px rgba(0,210,255,0.25);
    border-radius: 2px;
}