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

:root {
  --color-bg: #fafafa;
  --color-text: #333;
  --color-border: #ddd;
  --color-link: #0066cc;
  --color-primary: #0066cc;
  --color-secondary: #666;
  --font-serif: Georgia, 'Times New Roman', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

:root[data-theme="dark"] {
  --color-bg: #1a1a1a;
  --color-text: #e0e0e0;
  --color-border: #444;
  --color-link: #66b3ff;
  --color-primary: #66b3ff;
  --color-secondary: #aaa;
}

html, body {
  height: 100%;
}

body {
  font-family: var(--font-serif);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  transition: background-color 0.3s, color 0.3s;
}

/* Header */
.header {
  border-bottom: 1px solid var(--color-border);
  padding: 2rem 1rem;
  text-align: center;
}

.header-inner {
  max-width: 800px;
  margin: 0 auto;
}

.logo {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.logo-link {
  color: var(--color-text);
  text-decoration: none;
}

.logo-link:hover {
  color: var(--color-primary);
}

.tagline {
  font-size: 0.95rem;
  color: var(--color-secondary);
  font-style: italic;
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  padding: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.nav-list {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-link {
  color: var(--color-text);
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: color 0.3s;
}

.nav-link:hover {
  color: var(--color-primary);
}

.nav-link.active {
  color: var(--color-primary);
  font-weight: 600;
}

.theme-toggle {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* Container */
.container {
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 1rem;
}

/* Pages */
.page {
  display: none;
}

.page.active-page {
  display: block;
}

/* Page wrapper */
.page-wrapper {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 2rem;
}

@media (max-width: 768px) {
  .page-wrapper {
    grid-template-columns: 1fr;
  }

  .sidebar {
    order: -1;
  }
}

/* Main column */
.main-column {
  min-width: 0;
}

/* Sidebar */
.sidebar {
  font-size: 0.9rem;
}

.sidebar-widget {
  margin-bottom: 2rem;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.sidebar-widget h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  font-weight: 700;
}

.sidebar-widget p {
  font-size: 0.85rem;
  line-height: 1.5;
}

.sidebar-widget ul {
  list-style: none;
}

.sidebar-widget li {
  margin-bottom: 0.5rem;
}

.sidebar-widget a {
  color: var(--color-link);
  text-decoration: none;
}

.sidebar-widget a:hover {
  text-decoration: underline;
}

/* Feed */
.feed-container {
  /* Empty initially, filled by JS */
}

.post-card {
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
}

.post-card:last-child {
  border-bottom: none;
}

.post-card-title {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.post-card-title a {
  color: var(--color-text);
  text-decoration: none;
}

.post-card-title a:hover {
  color: var(--color-primary);
}

.post-card-meta .author-link {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
}

.post-card-meta .author-link:hover {
  text-decoration: underline;
}

.post-card-meta {
  font-size: 0.85rem;
  color: var(--color-secondary);
  margin-bottom: 1rem;
  font-family: var(--font-sans);
}

.post-card-excerpt {
  margin-bottom: 1rem;
  color: var(--color-text);
}

.post-card-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  background-color: var(--color-border);
  padding: 0.25rem 0.5rem;
  border-radius: 3px;
  font-size: 0.75rem;
  color: var(--color-secondary);
}

/* Forms */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.25rem;
  font-weight: 600;
  font-family: var(--font-sans);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  border-radius: 4px;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.1);
}

.help-text {
  font-size: 0.8rem;
  color: var(--color-secondary);
  margin-top: 0.25rem;
}

.info-box {
  background-color: var(--color-border);
  padding: 1rem;
  border-radius: 4px;
  font-size: 0.9rem;
  margin: 1rem 0;
}

/* CoinIMP instructions */
.coinimp-instructions {
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.75rem 1rem;
  margin: 0.75rem 0;
  font-size: 0.9rem;
}

.coinimp-instructions summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-accent);
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.coinimp-instructions summary::before {
  content: '▶';
  font-size: 0.7rem;
  transition: transform 0.2s;
}

.coinimp-instructions[open] summary::before {
  transform: rotate(90deg);
}

.instructions-list {
  margin: 0.75rem 0 0.5rem 1.25rem;
  line-height: 1.8;
}

.instructions-list li {
  margin-bottom: 0.25rem;
}

.instructions-sublist {
  margin: 0.4rem 0 0.4rem 1.25rem;
  line-height: 1.9;
  list-style: none;
}

.instructions-sublist li {
  margin-bottom: 0.1rem;
}

.coinimp-instructions code {
  display: inline-block;
  background: var(--color-border);
  border-radius: 3px;
  padding: 0.15rem 0.4rem;
  font-family: monospace;
  font-size: 0.82rem;
  word-break: break-all;
}

/* CoinIMP Stats Panel */
.coinimp-stats-panel {
  background: var(--color-border);
  border-radius: 8px;
  padding: 1rem;
  margin-top: 1rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.stat-card {
  background: var(--color-surface, #1e1e1e);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--color-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent, #7c5cbf);
  line-height: 1.1;
}

.stat-unit {
  font-size: 0.75rem;
  color: var(--color-secondary);
}

.stats-updated {
  font-size: 0.78rem;
  color: var(--color-secondary);
  margin: 0;
}

/* Editor */
.editor-container {
  /* */
}

.auth-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--color-border);
}

.auth-tab {
  background: none;
  border: none;
  padding: 0.6rem 1.25rem;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  color: var(--color-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.15s, border-color 0.15s;
}

.auth-tab.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  font-weight: 600;
}

.auth-tab:hover {
  color: var(--color-primary);
}

.required {
  color: #e53935;
  font-size: 0.85em;
}

.auth-section {
  margin-bottom: 2rem;
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.auth-form {
  /* */
}

.editor-section {
  /* */
}

.editor-form {
  /* */
}

.editor-body {
  min-height: 400px;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-serif);
  line-height: 1.8;
  outline: none;
}

.editor-body:focus {
  border-color: var(--color-primary);
}

.editor-body[contenteditable]:empty:before {
  content: attr(placeholder);
  color: var(--color-secondary);
  pointer-events: none;
}

.form-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s;
}

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

.btn-primary {
  background-color: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

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

.btn-link {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-link);
  text-decoration: underline;
}

.btn-link:hover {
  color: var(--color-primary);
}

/* User profile */
.user-container {
  max-width: 600px;
}

.user-form fieldset {
  margin-bottom: 2rem;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.user-form legend {
  font-weight: 700;
  padding: 0 0.5rem;
}

/* Legal content */
.legal-content {
  max-width: 700px;
  font-size: 1rem;
}

.legal-content h2 {
  font-size: 1.3rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.legal-content p {
  margin-bottom: 1rem;
}

.legal-content ul {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

.legal-content li {
  margin-bottom: 0.5rem;
}

.legal-content a {
  color: var(--color-link);
}

/* Reader */
.reader-container {
  font-size: 1.05rem;
  line-height: 1.8;
}

.reader-container h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.reader-meta {
  font-size: 0.9rem;
  color: var(--color-secondary);
  margin-bottom: 2rem;
  font-family: var(--font-sans);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1rem;
}

.reader-body {
  margin-bottom: 2rem;
}

.reader-body p {
  margin-bottom: 1rem;
}

.reader-body h2 {
  font-size: 1.4rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.reader-body h3 {
  font-size: 1.2rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.reader-body blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: 1rem;
  margin: 1rem 0;
  color: var(--color-secondary);
  font-style: italic;
}

.reader-body code {
  background-color: var(--color-border);
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-family: monospace;
}

.reader-body pre {
  background-color: var(--color-border);
  padding: 1rem;
  border-radius: 4px;
  overflow-x: auto;
  margin: 1rem 0;
}

.reader-body pre code {
  background: none;
  padding: 0;
}

.author-widget {
  margin-top: 2rem;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background-color: var(--color-border);
}

.author-widget h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.author-widget p {
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.author-widget a {
  color: var(--color-link);
  text-decoration: none;
}

.author-widget a:hover {
  text-decoration: underline;
}

/* Dialogs */
dialog {
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background-color: var(--color-bg);
  color: var(--color-text);
  padding: 2rem;
  max-width: 500px;
}

dialog::backdrop {
  background-color: rgba(0, 0, 0, 0.5);
}

.dialog-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text);
}

.reader-dialog {
  max-width: 600px;
}

.compute-dialog {
  max-width: 420px;
  width: 95vw;
}

.compute-dialog-content {
  position: relative;
  padding: 0.5rem 0;
}

.compute-title {
  margin-bottom: 0.75rem;
  font-size: 1.15rem;
}

/* Platform support button */
#platformSupportBtn {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  z-index: 9000;
  background: linear-gradient(135deg, #6c3fc5, #9b59b6);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 0.5rem 1.1rem;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(108,63,197,0.35);
  transition: opacity 0.2s, transform 0.2s;
  display: none; /* shown by JS after platform config loads */
}
#platformSupportBtn:hover { opacity: 0.88; transform: translateY(-2px); }

/* Mining float widget */
#miningFloat {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  width: 280px;
  background: var(--color-surface, #1e1e1e);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.45);
  overflow: hidden;
  user-select: none;
}

.mining-float-handle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0.75rem;
  background: rgba(108,63,197,0.18);
  cursor: grab;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text);
}
.mining-float-handle:active { cursor: grabbing; }

.mining-float-actions { display: flex; gap: 0.3rem; }

.mining-float-btn {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-secondary);
  border-radius: 4px;
  width: 26px;
  height: 26px;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  line-height: 1;
}
.mining-float-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }

#miningFloatBody {
  padding: 0.75rem 1rem 1rem;
}

#miningFloat.minimized #miningFloatBody { display: none; }

.compute-intro {
  font-size: 0.9rem;
  color: var(--color-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.compute-thanks {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

/* Power selector */
.power-selector { margin: 1rem 0; }

.power-label {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  color: var(--color-secondary);
}

.power-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.5rem;
}

.power-btn {
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: none;
  color: var(--color-text);
  font-size: 0.85rem;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.power-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.power-btn.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
  font-weight: 700;
}

.power-hint {
  font-size: 0.8rem;
  color: var(--color-secondary);
}

.power-active {
  font-size: 0.9rem;
  margin: 0.75rem 0 0;
}

/* Hash display */
.hash-display {
  display: flex;
  gap: 1.5rem;
  margin: 1rem 0;
}

.hash-count-box {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hash-count-box span {
  font-size: 1.8rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-accent);
}

.hash-count-box small {
  font-size: 0.75rem;
  color: var(--color-secondary);
}

.hash-contrib {
  font-size: 0.82rem;
  color: var(--color-secondary);
}

/* Author widget action buttons */
.btn-support-compute {
  display: block;
  width: 100%;
  margin-top: 0.75rem;
  padding: 0.55rem 1rem;
  background: linear-gradient(135deg, #6c3fc5, #9b59b6);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: opacity 0.2s;
}
.btn-support-compute:hover { opacity: 0.85; }

.btn-donate-link {
  display: block;
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.45rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 0.85rem;
  text-align: center;
  color: var(--color-secondary);
  text-decoration: none;
  transition: border-color 0.2s;
}
.btn-donate-link:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* Supporters */
.supporters-widget {
  background: var(--color-border);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  margin-bottom: 1.5rem;
}

.supporters-widget h4 {
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.supporters-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.supporter-chip {
  background: var(--color-accent);
  color: #fff;
  border-radius: 20px;
  padding: 0.2rem 0.65rem;
  font-size: 0.8rem;
  font-family: var(--font-sans);
}

/* Author post card */
.author-post-card {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
}

.author-post-card:last-child {
  border-bottom: none;
}

.author-post-card h4 {
  margin-bottom: 0.2rem;
}

.author-post-meta {
  font-size: 0.8rem;
  color: var(--color-secondary);
  margin-bottom: 0.25rem;
}

/* Comments section */
.comments-section {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.comments-section h3 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.comment-item {
  margin-bottom: 1.5rem;
  padding: 1rem;
  background-color: var(--color-border);
  border-radius: 4px;
}

.comment-author {
  font-weight: 600;
  font-family: var(--font-sans);
  margin-bottom: 0.25rem;
}

.comment-body {
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.comment-time {
  font-size: 0.8rem;
  color: var(--color-secondary);
}

.comment-form {
  margin-top: 2rem;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.comment-form h4 {
  font-size: 1rem;
  margin-bottom: 1rem;
}

/* Toast notifications */
#toastContainer {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  pointer-events: none;
}

.toast {
  padding: 0.75rem 1.25rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-family: var(--font-sans);
  box-shadow: 0 4px 16px rgba(0,0,0,0.18);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  max-width: 320px;
  line-height: 1.4;
}

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

.toast-success {
  background: #2d6a2d;
  color: #e8f5e8;
  border-left: 4px solid #4caf50;
}

.toast-error {
  background: #6a2d2d;
  color: #f5e8e8;
  border-left: 4px solid #f44336;
}

.toast-info {
  background: var(--color-border);
  color: var(--color-text);
  border-left: 4px solid var(--color-accent);
}

/* Utilities */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.mt-2 {
  margin-top: 1rem;
}

.mb-2 {
  margin-bottom: 1rem;
}