/* Threads Timeline Exact Replica */

:root {
  /* Threads exact colors */
  --threads-bg: #ffffff;
  --threads-bg-dark: #000000;
  --threads-text: #000000;
  --threads-text-dark: #ffffff;
  --threads-secondary: #999999;
  --threads-border: #dbdbdb;
  --threads-border-dark: #2a2a2a;
  --threads-hover: #f3f3f3;
  --threads-hover-dark: #1a1a1a;
  --threads-blue: #0095f6;
  --threads-heart: #ed4956;

  /* Threads spacing */
  --threads-spacing: 16px;
  --threads-avatar-size: 40px;
  --threads-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  font-family: var(--threads-font);
  background: var(--threads-bg);
  color: var(--threads-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-color-scheme: dark) {
  body {
    background: var(--threads-bg-dark);
    color: var(--threads-text-dark);
  }
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: #000;
  color: #fff;
  padding: 8px 16px;
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}

/* Threads App Container */
.threads-app {
  max-width: 630px;
  margin: 0 auto;
  background: var(--threads-bg);
}

@media (prefers-color-scheme: dark) {
  .threads-app {
    background: var(--threads-bg-dark);
  }
}

/* Threads Header - Exact replica */
.threads-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--threads-bg);
  border-bottom: 1px solid var(--threads-border);
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.8);
}

@media (prefers-color-scheme: dark) {
  .threads-header {
    background: rgba(0, 0, 0, 0.8);
    border-bottom-color: var(--threads-border-dark);
  }
}

.threads-header-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 60px;
  padding: 0 var(--threads-spacing);
  position: relative;
}

.threads-logo {
  width: 32px;
  height: 32px;
}

.threads-logo svg {
  width: 100%;
  height: 100%;
}

/* Threads Post (Thread) */
.thread {
  border-bottom: 1px solid var(--threads-border);
  padding: 16px var(--threads-spacing);
  cursor: pointer;
  transition: background 0.1s;
}

.thread:hover {
  background: var(--threads-hover);
}

@media (prefers-color-scheme: dark) {
  .thread {
    border-bottom-color: var(--threads-border-dark);
  }

  .thread:hover {
    background: var(--threads-hover-dark);
  }
}

.thread-header {
  display: flex;
  gap: 12px;
  margin-bottom: 8px;
}

.thread-avatar {
  width: var(--threads-avatar-size);
  height: var(--threads-avatar-size);
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 18px;
}

.thread-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.thread-main {
  flex: 1;
  min-width: 0;
}

.thread-user {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 2px;
}

.thread-username {
  font-weight: 600;
  font-size: 15px;
  color: var(--threads-text);
}

@media (prefers-color-scheme: dark) {
  .thread-username {
    color: var(--threads-text-dark);
  }
}

.thread-verified {
  width: 14px;
  height: 14px;
  color: var(--threads-blue);
}

.thread-time {
  color: var(--threads-secondary);
  font-size: 15px;
  margin-left: auto;
}

.thread-content {
  font-size: 15px;
  line-height: 20px;
  margin-bottom: 12px;
  white-space: pre-wrap;
  word-wrap: break-word;
  color: var(--threads-text);
}

.thread-content strong {
  font-weight: 600;
  color: var(--threads-text);
  display: block;
  margin-top: 12px;
  margin-bottom: 6px;
}

.thread-content strong:first-child {
  margin-top: 8px;
}

@media (prefers-color-scheme: dark) {
  .thread-content {
    color: var(--threads-text-dark);
  }

  .thread-content strong {
    color: var(--threads-text-dark);
  }
}

.thread-link {
  color: var(--threads-blue);
  text-decoration: none;
}

.thread-link:hover {
  text-decoration: underline;
}

.thread-code {
  background: var(--threads-hover);
  border: 1px solid var(--threads-border);
  border-radius: 12px;
  padding: 12px;
  margin: 12px 0;
  overflow-x: auto;
}

@media (prefers-color-scheme: dark) {
  .thread-code {
    background: var(--threads-hover-dark);
    border-color: var(--threads-border-dark);
  }
}

.thread-code pre {
  font-family: 'SF Mono', Monaco, Menlo, Consolas, monospace;
  font-size: 13px;
  line-height: 1.6;
  margin: 0;
}

.thread-code code {
  color: var(--threads-text);
}

@media (prefers-color-scheme: dark) {
  .thread-code code {
    color: var(--threads-text-dark);
  }
}

/* Syntax highlighting for code */
.code-keyword { color: #cf222e; font-weight: 500; }
.code-string { color: #0a3069; }
.code-comment { color: #6e7781; font-style: italic; }
.code-function { color: #8250df; }
.code-variable { color: #953800; }

@media (prefers-color-scheme: dark) {
  .code-keyword { color: #ff7b72; }
  .code-string { color: #a5d6ff; }
  .code-comment { color: #8b949e; }
  .code-function { color: #d2a8ff; }
  .code-variable { color: #ffa657; }
}

@media (prefers-color-scheme: dark) {
  .code-keyword { color: #ff7b72; }
  .code-string { color: #a5d6ff; }
  .code-comment { color: #8b949e; }
  .code-function { color: #d2a8ff; }
  .code-variable { color: #ffa657; }
}

.thread-actions {
  display: flex;
  gap: 16px;
  margin-top: 12px;
}

.thread-action {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  padding: 0;
  border: none;
  background: none;
  color: var(--threads-text);
  font-size: 14px;
  transition: opacity 0.1s;
}

.thread-action:hover {
  opacity: 0.7;
}

@media (prefers-color-scheme: dark) {
  .thread-action {
    color: var(--threads-text-dark);
  }
}

.thread-action svg {
  width: 20px;
  height: 20px;
  stroke-width: 2;
}

.thread-action.liked svg {
  fill: var(--threads-heart);
  stroke: var(--threads-heart);
}

/* Badge */
.thread-badge {
  display: inline-block;
  padding: 4px 10px;
  background: var(--threads-hover);
  border-radius: 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--threads-text);
  margin: 4px 4px 4px 0;
}

@media (prefers-color-scheme: dark) {
  .thread-badge {
    background: var(--threads-hover-dark);
    color: var(--threads-text-dark);
  }
}

.thread-badge.primary {
  background: var(--threads-blue);
  color: white;
}

/* Feature grid in thread */
.thread-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin: 12px 0;
}

.thread-feature {
  background: var(--threads-hover);
  border: 1px solid var(--threads-border);
  border-radius: 12px;
  padding: 12px;
  font-size: 14px;
}

@media (prefers-color-scheme: dark) {
  .thread-feature {
    background: var(--threads-hover-dark);
    border-color: var(--threads-border-dark);
  }
}

.thread-feature-icon {
  font-size: 24px;
  margin-bottom: 6px;
}

.thread-feature-title {
  font-weight: 600;
  margin-bottom: 4px;
}

.thread-feature-desc {
  color: var(--threads-secondary);
  font-size: 13px;
}

/* CTA Button */
.thread-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--threads-text);
  color: var(--threads-bg);
  border: none;
  border-radius: 12px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.1s;
  margin: 8px 4px 8px 0;
}

.thread-cta:hover {
  opacity: 0.8;
}

@media (prefers-color-scheme: dark) {
  .thread-cta {
    background: var(--threads-text-dark);
    color: var(--threads-bg-dark);
  }
}

.thread-cta.secondary {
  background: transparent;
  color: var(--threads-text);
  border: 1px solid var(--threads-border);
}

@media (prefers-color-scheme: dark) {
  .thread-cta.secondary {
    color: var(--threads-text-dark);
    border-color: var(--threads-border-dark);
  }
}

/* Footer - Threads style */
.threads-footer {
  border-top: 1px solid var(--threads-border);
  padding: 32px var(--threads-spacing);
  text-align: center;
  color: var(--threads-secondary);
  font-size: 13px;
}

@media (prefers-color-scheme: dark) {
  .threads-footer {
    border-top-color: var(--threads-border-dark);
  }
}

.threads-footer a {
  color: var(--threads-secondary);
  text-decoration: none;
  margin: 0 8px;
}

.threads-footer a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
  .threads-app {
    max-width: 100%;
  }

  .thread-features {
    grid-template-columns: 1fr;
  }
}

/* Loading animation */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.loading {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
}

/* Selection color */
::selection {
  background: var(--threads-blue);
  color: white;
}