/* Oxocarbon Theme Variables */
:root {
  /* Oxocarbon Light Palette */
  --oxo-light-bg: #ffffff;
  --oxo-light-surface: #f4f4f4;
  --oxo-light-surface-variant: #e0e0e0;
  --oxo-light-border: #d1d1d1;
  --oxo-light-text-primary: #161616;
  --oxo-light-text-secondary: #525252;
  --oxo-light-text-muted: #8d8d8d;
  
  /* Oxocarbon Dark Palette */
  --oxo-dark-bg: #161616;
  --oxo-dark-surface: #262626;
  --oxo-dark-surface-variant: #393939;
  --oxo-dark-border: #525252;
  --oxo-dark-text-primary: #f4f4f4;
  --oxo-dark-text-secondary: #c6c6c6;
  --oxo-dark-text-muted: #a8a8a8;
  
  /* Accent Colors (BlueSky inspired) */
  --accent-primary: #0066ff;
  --accent-primary-hover: #0052cc;
  --accent-secondary: #0ea5e9;
  --accent-success: #22c55e;
  --accent-error: #ef4444;
  --accent-warning: #f59e0b;
  
  /* Default to light theme */
  --bg: var(--oxo-light-bg);
  --surface: var(--oxo-light-surface);
  --surface-variant: var(--oxo-light-surface-variant);
  --border: var(--oxo-light-border);
  --text-primary: var(--oxo-light-text-primary);
  --text-secondary: var(--oxo-light-text-secondary);
  --text-muted: var(--oxo-light-text-muted);
}

/* Oxocarbon Dark */
[data-theme="dark"] {
  --bg: var(--oxo-dark-bg);
  --surface: var(--oxo-dark-surface);
  --surface-variant: var(--oxo-dark-surface-variant);
  --border: var(--oxo-dark-border);
  --text-primary: var(--oxo-dark-text-primary);
  --text-secondary: var(--oxo-dark-text-secondary);
  --text-muted: var(--oxo-dark-text-muted);
}

/* Catppuccin Theme Variables */
:root {
  /* Catppuccin Latte (Light) */
  --ctp-latte-bg: #eff1f5;
  --ctp-latte-surface: #e6e9ef;
  --ctp-latte-surface-variant: #ccd0da;
  --ctp-latte-border: #bcc0cc;
  --ctp-latte-text-primary: #4c4f69;
  --ctp-latte-text-secondary: #6c6f85;
  --ctp-latte-text-muted: #9ca0b0;

  /* Catppuccin Mocha (Dark) */
  --ctp-mocha-bg: #1e1e2e;
  --ctp-mocha-surface: #181825;
  --ctp-mocha-surface-variant: #313244;
  --ctp-mocha-border: #45475a;
  --ctp-mocha-text-primary: #cdd6f4;
  --ctp-mocha-text-secondary: #a6adc8;
  --ctp-mocha-text-muted: #7f849c;
}

/* Catppuccin Latte */
[data-theme="catppuccin-latte"] {
  --bg: var(--ctp-latte-bg);
  --surface: var(--ctp-latte-surface);
  --surface-variant: var(--ctp-latte-surface-variant);
  --border: var(--ctp-latte-border);
  --text-primary: var(--ctp-latte-text-primary);
  --text-secondary: var(--ctp-latte-text-secondary);
  --text-muted: var(--ctp-latte-text-muted);
  --accent-primary: #7287fd;
  --accent-primary-hover: #5c6ee6;
  --accent-secondary: #209fb5;
  --accent-success: #40a02b;
  --accent-error: #d20f39;
  --accent-warning: #fe640b;
}

/* Catppuccin Mocha */
[data-theme="catppuccin-mocha"] {
  --bg: var(--ctp-mocha-bg);
  --surface: var(--ctp-mocha-surface);
  --surface-variant: var(--ctp-mocha-surface-variant);
  --border: var(--ctp-mocha-border);
  --text-primary: var(--ctp-mocha-text-primary);
  --text-secondary: var(--ctp-mocha-text-secondary);
  --text-muted: var(--ctp-mocha-text-muted);
  --accent-primary: #b4befe;
  --accent-primary-hover: #9aa3e6;
  --accent-secondary: #74c7ec;
  --accent-success: #a6e3a1;
  --accent-error: #f38ba8;
  --accent-warning: #fab387;
}

/* Nord Theme Variables */
:root {
  /* Nord Snow Storm (Light) */
  --nord-light-bg: #eceff4;
  --nord-light-surface: #e5e9f0;
  --nord-light-surface-variant: #d8dee9;
  --nord-light-border: #c2c8d4;
  --nord-light-text-primary: #2e3440;
  --nord-light-text-secondary: #434c5e;
  --nord-light-text-muted: #4c566a;

  /* Nord Polar Night (Dark) */
  --nord-dark-bg: #2e3440;
  --nord-dark-surface: #3b4252;
  --nord-dark-surface-variant: #434c5e;
  --nord-dark-border: #4c566a;
  --nord-dark-text-primary: #eceff4;
  --nord-dark-text-secondary: #d8dee9;
  --nord-dark-text-muted: #a5abb6;
}

/* Nord Snow Storm */
[data-theme="nord-light"] {
  --bg: var(--nord-light-bg);
  --surface: var(--nord-light-surface);
  --surface-variant: var(--nord-light-surface-variant);
  --border: var(--nord-light-border);
  --text-primary: var(--nord-light-text-primary);
  --text-secondary: var(--nord-light-text-secondary);
  --text-muted: var(--nord-light-text-muted);
  --accent-primary: #5e81ac;
  --accent-primary-hover: #4c6d96;
  --accent-secondary: #88c0d0;
  --accent-success: #a3be8c;
  --accent-error: #bf616a;
  --accent-warning: #d08770;
}

/* Nord Polar Night */
[data-theme="nord-dark"] {
  --bg: var(--nord-dark-bg);
  --surface: var(--nord-dark-surface);
  --surface-variant: var(--nord-dark-surface-variant);
  --border: var(--nord-dark-border);
  --text-primary: var(--nord-dark-text-primary);
  --text-secondary: var(--nord-dark-text-secondary);
  --text-muted: var(--nord-dark-text-muted);
  --accent-primary: #88c0d0;
  --accent-primary-hover: #6fb0c2;
  --accent-secondary: #81a1c1;
  --accent-success: #a3be8c;
  --accent-error: #bf616a;
  --accent-warning: #d08770;
}

/* Rosé Pine Theme Variables */
:root {
  /* Rosé Pine Dawn (Light) */
  --rose-light-bg: #faf4ed;
  --rose-light-surface: #fffaf3;
  --rose-light-surface-variant: #f2e9e1;
  --rose-light-border: #dfdad9;
  --rose-light-text-primary: #575279;
  --rose-light-text-secondary: #797593;
  --rose-light-text-muted: #9893a5;

  /* Rosé Pine Main (Dark) */
  --rose-dark-bg: #191724;
  --rose-dark-surface: #1f1d2e;
  --rose-dark-surface-variant: #26233a;
  --rose-dark-border: #524f67;
  --rose-dark-text-primary: #e0def4;
  --rose-dark-text-secondary: #908caa;
  --rose-dark-text-muted: #6e6a86;
}

/* Rosé Pine Dawn */
[data-theme="rose-pine-dawn"] {
  --bg: var(--rose-light-bg);
  --surface: var(--rose-light-surface);
  --surface-variant: var(--rose-light-surface-variant);
  --border: var(--rose-light-border);
  --text-primary: var(--rose-light-text-primary);
  --text-secondary: var(--rose-light-text-secondary);
  --text-muted: var(--rose-light-text-muted);
  --accent-primary: #d7827e;
  --accent-primary-hover: #c56d69;
  --accent-secondary: #56949f;
  --accent-success: #286983;
  --accent-error: #b4637a;
  --accent-warning: #ea9d34;
}

/* Rosé Pine Main */
[data-theme="rose-pine-moon"] {
  --bg: var(--rose-dark-bg);
  --surface: var(--rose-dark-surface);
  --surface-variant: var(--rose-dark-surface-variant);
  --border: var(--rose-dark-border);
  --text-primary: var(--rose-dark-text-primary);
  --text-secondary: var(--rose-dark-text-secondary);
  --text-muted: var(--rose-dark-text-muted);
  --accent-primary: #ebbcba;
  --accent-primary-hover: #d9a8a6;
  --accent-secondary: #9ccfd8;
  --accent-success: #31748f;
  --accent-error: #eb6f92;
  --accent-warning: #f6c177;
}

/* Base Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Font Variables */
:root {
  --font-heading: 'Lora', Georgia, 'Times New Roman', serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', 'Fira Code', monospace;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--text-primary);
}

p {
  color: var(--text-secondary);
}

/* Mobile Container */
.mobile-container {
  max-width: 414px;
  margin: 0 auto;
  min-height: 100vh;
  background-color: var(--bg);
  position: relative;
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
}

@media (max-width: 414px) {
  .mobile-container {
    border: none;
  }
}

/* Navigation Bar */
.nav-bar {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 414px;
  background-color: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-around;
  padding: 12px 0 24px;
  z-index: 100;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-item:hover,
.nav-item.active {
  color: var(--accent-primary);
}

.nav-item svg {
  width: 24px;
  height: 24px;
}

.nav-item span {
  font-size: 12px;
  font-weight: 500;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  background-color: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-title {
  font-size: 18px;
  font-weight: 600;
}

.header-action {
  background: none;
  border: none;
  color: var(--accent-primary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  padding: 8px 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 9999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  width: 100%;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: white;
}

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

.btn-secondary {
  background-color: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

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

.btn-outline {
  background-color: transparent;
  color: var(--accent-primary);
  border: 1.5px solid var(--accent-primary);
}

.btn-outline:hover {
  background-color: rgba(0, 102, 255, 0.1);
}

/* Cards */
.card {
  background-color: var(--surface);
  border-radius: 12px;
  padding: 16px;
  border: 1px solid var(--border);
}

/* Inputs */
.input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background-color: var(--surface);
  color: var(--text-primary);
  font-size: 15px;
  transition: border-color 0.2s ease;
}

.input:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.input::placeholder {
  color: var(--text-muted);
}

/* Divider */
.divider {
  height: 1px;
  background-color: var(--border);
  margin: 16px 0;
}

/* Avatar */
.avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--surface-variant);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.avatar-sm {
  width: 40px;
  height: 40px;
  font-size: 14px;
}

.avatar-lg {
  width: 80px;
  height: 80px;
  font-size: 28px;
}

/* Post Card */
.post-card {
  padding: 16px;
  border-bottom: 1px solid var(--border);
  background-color: var(--bg);
}

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

.post-author {
  flex: 1;
}

.post-author-name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 15px;
}

.post-author-handle {
  color: var(--text-secondary);
  font-size: 14px;
}

.post-timestamp {
  color: var(--text-muted);
  font-size: 13px;
}

.post-content {
  color: var(--text-primary);
  font-size: 15px;
  line-height: 1.5;
  margin-bottom: 12px;
}

.post-facet {
  color: var(--accent-primary);
  text-decoration: none;
}

.post-facet:hover {
  text-decoration: underline;
}

.post-actions {
  display: flex;
  gap: 24px;
}

.post-action {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  font-size: 13px;
  background: none;
  border: none;
  cursor: pointer;
  transition: color 0.2s ease;
}

.post-action:hover {
  color: var(--accent-primary);
}

.post-action svg {
  width: 20px;
  height: 20px;
}

/* Settings Items */
.settings-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.settings-item:hover {
  background-color: var(--surface);
}

.settings-item-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.settings-item-icon {
  width: 24px;
  height: 24px;
  color: var(--text-secondary);
}

.settings-item-content {
  display: flex;
  flex-direction: column;
}

.settings-item-title {
  font-weight: 500;
  color: var(--text-primary);
  font-size: 15px;
}

.settings-item-subtitle {
  color: var(--text-secondary);
  font-size: 13px;
}

.settings-item-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Toggle Switch */
.toggle {
  width: 48px;
  height: 28px;
  background-color: var(--surface-variant);
  border-radius: 14px;
  position: relative;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.toggle.active {
  background-color: var(--accent-primary);
}

.toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 24px;
  height: 24px;
  background-color: white;
  border-radius: 50%;
  transition: transform 0.3s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.toggle.active .toggle-thumb {
  transform: translateX(20px);
}

/* Theme Preview */
.theme-preview {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 2px solid var(--border);
  cursor: pointer;
  transition: all 0.2s ease;
}

.theme-preview:hover,
.theme-preview.active {
  border-color: var(--accent-primary);
  transform: scale(1.05);
}

.theme-preview-light {
  background: linear-gradient(135deg, #ffffff 50%, #f4f4f4 50%);
}

.theme-preview-dark {
  background: linear-gradient(135deg, #161616 50%, #262626 50%);
}

.theme-preview-catppuccin-latte {
  background: linear-gradient(135deg, #eff1f5 50%, #e6e9ef 50%);
}

.theme-preview-catppuccin-mocha {
  background: linear-gradient(135deg, #1e1e2e 50%, #181825 50%);
}

.theme-preview-nord-light {
  background: linear-gradient(135deg, #eceff4 50%, #e5e9f0 50%);
}

.theme-preview-nord-dark {
  background: linear-gradient(135deg, #2e3440 50%, #3b4252 50%);
}

.theme-preview-rose-pine-dawn {
  background: linear-gradient(135deg, #faf4ed 50%, #fffaf3 50%);
}

.theme-preview-rose-pine-moon {
  background: linear-gradient(135deg, #191724 50%, #1f1d2e 50%);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--surface);
}

::-webkit-scrollbar-thumb {
  background: var(--surface-variant);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border);
}

/* Safe Area for Mobile */
.safe-area-bottom {
  padding-bottom: 88px;
}

/* Screen Content Padding */
.screen-content {
  padding: 16px;
}

/* Debug Badge */
.debug-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  background-color: var(--accent-warning);
  color: #161616;
  font-size: 11px;
  font-weight: 600;
  border-radius: 4px;
  text-transform: uppercase;
}

/* OAuth Provider Button */
.oauth-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 14px 24px;
  border-radius: 9999px;
  border: 1.5px solid var(--border);
  background-color: var(--surface);
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  width: 100%;
}

.oauth-btn:hover {
  background-color: var(--surface-variant);
  border-color: var(--text-secondary);
}

.oauth-btn svg {
  width: 20px;
  height: 20px;
}

/* Link */
.link {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 500;
}

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

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  text-align: center;
}

.empty-state-icon {
  width: 64px;
  height: 64px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.empty-state-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.empty-state-text {
  color: var(--text-secondary);
  font-size: 14px;
  max-width: 280px;
}