/* Modern Design System - Professional & Intuitive */
:root {
  /* Core Palette - HSL for better manipulation */
  --hue-primary: 210;
  /* Blue */
  --hue-accent: 170;
  /* Teal */
  --hue-success: 150;
  --hue-warning: 40;
  --hue-danger: 350;

  /* Light Theme Variables */
  --bg-color: #f4f6f9;
  --surface-color: #ffffff;
  --surface-hover: #f8f9fa;
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-tertiary: #718096;

  --primary-color: hsl(var(--hue-primary), 90%, 50%);
  --primary-hover: hsl(var(--hue-primary), 90%, 45%);
  --primary-light: hsl(var(--hue-primary), 90%, 96%);

  --accent-color: hsl(var(--hue-accent), 80%, 45%);

  --border-color: #e2e8f0;
  --border-hover: #cbd5e0;

  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.6);
  --glass-blur: 16px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Mono', monospace;
}

[data-theme="dark"] {
  /* Dark Theme Variables */
  --bg-color: #0f172a;
  --surface-color: #1e293b;
  --surface-hover: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;

  --primary-color: hsl(var(--hue-primary), 80%, 60%);
  --primary-hover: hsl(var(--hue-primary), 80%, 55%);
  --primary-light: rgba(56, 189, 248, 0.1);

  --accent-color: hsl(var(--hue-accent), 70%, 50%);

  --border-color: #334155;
  --border-hover: #475569;

  --glass-bg: rgba(30, 41, 59, 0.85);
  --glass-border: rgba(255, 255, 255, 0.08);

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
}

/* Global Reset & Base */
body {
  background-color: var(--bg-color);
  background-image:
    radial-gradient(at 0% 0%, hsla(253, 16%, 7%, 1) 0, transparent 50%),
    radial-gradient(at 50% 0%, hsla(225, 39%, 30%, 1) 0, transparent 50%),
    radial-gradient(at 100% 0%, hsla(339, 49%, 30%, 1) 0, transparent 50%);
  background-attachment: fixed;
  color: var(--text-primary);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
  margin: 0;
  min-height: 100vh;
}

[data-theme="light"] body {
  background-color: #f4f6f9;
  background-image:
    radial-gradient(at 40% 20%, hsla(210, 100%, 96%, 1) 0px, transparent 50%),
    radial-gradient(at 80% 0%, hsla(189, 100%, 96%, 1) 0px, transparent 50%),
    radial-gradient(at 0% 50%, hsla(341, 100%, 96%, 1) 0px, transparent 50%);
}

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

a:hover {
  color: var(--primary-hover);
}

/* Glassmorphism Utility */
.glass {
  background: var(--glass-bg) !important;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border) !important;
  box-shadow: var(--shadow-lg) !important;
}

/* Sticky Header Override */
.ui.fixed.menu {
  position: sticky !important;
  top: 0;
  width: 100%;
  z-index: 1000;
}

/* Dropdown Fix */
#user_dropdown .menu {
  margin-top: 0 !important;
  padding-top: 0.5rem;
  display: none;
  /* Semantic UI handles display, but we override margin */
}

#user_dropdown:hover .menu {
  display: block;
}

/* Bridge to prevent menu closing */
#user_dropdown .menu::before {
  content: '';
  position: absolute;
  top: -0.5rem;
  left: 0;
  width: 100%;
  height: 0.5rem;
  background: transparent;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    transform: translateY(10px);
    opacity: 0;
  }

  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes scaleIn {
  from {
    transform: scale(0.95);
    opacity: 0;
  }

  to {
    transform: scale(1);
    opacity: 1;
  }
}

.animate-fade-in {
  animation: fadeIn 0.4s ease-out forwards;
}

.animate-slide-up {
  animation: slideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-scale-in {
  animation: scaleIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Semantic UI Overrides - The "Professional" Look */

/* Containers */
.ui.container {
  width: 100%;
  max-width: 1200px !important;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Headers */
.ui.header {
  color: var(--text-primary) !important;
  font-family: var(--font-sans);
  font-weight: 700;
  letter-spacing: -0.025em;
}

/* Segments & Cards */
.ui.segment,
.ui.card,
.ui.cards>.card {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  border-radius: var(--radius-lg);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.ui.segment:hover,
.ui.card:hover,
.ui.cards>.card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.ui.card:hover,
.ui.cards>.card:hover {
  transform: translateY(-2px);
}

/* Menus */
.ui.menu {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
}

.ui.menu .item {
  color: var(--text-secondary);
  font-weight: 500;
  transition: all 0.2s ease;
}

.ui.menu .item:hover {
  color: var(--text-primary);
  background: var(--surface-hover);
}

.ui.menu .active.item {
  color: var(--primary-color) !important;
  background: var(--primary-light) !important;
  font-weight: 600;
}

/* Buttons */
.ui.button {
  border-radius: var(--radius-md);
  font-weight: 600;
  font-family: var(--font-sans);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-xs);
}

.ui.primary.button {
  background-color: var(--primary-color);
  color: #ffffff;
}

.ui.primary.button:hover {
  background-color: var(--primary-hover);
  box-shadow: 0 4px 12px rgba(var(--hue-primary), 90%, 50%, 0.3);
  transform: translateY(-1px);
}

/* Inputs */
.ui.input input {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--surface-color);
  color: var(--text-primary);
  padding: 0.75em 1em;
  transition: all 0.2s ease;
}

.ui.input input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px var(--primary-light);
}

/* Tables */
.ui.table {
  background: var(--surface-color);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: none;
}

.ui.table thead th {
  background: var(--surface-hover);
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  padding: 1em;
}

.ui.table tbody td {
  border-top: 1px solid var(--border-color);
  padding: 1em;
}

/* Dark Theme Specifics for UI Components */
[data-theme="dark"] .ui.segment,
[data-theme="dark"] .ui.menu,
[data-theme="dark"] .ui.card,
[data-theme="dark"] .ui.table {
  background: var(--surface-color);
  border-color: var(--border-color);
}

[data-theme="dark"] .ui.header {
  color: var(--text-primary);
}

[data-theme="dark"] .ui.table thead th {
  background: var(--surface-hover);
  color: var(--text-secondary);
}

/* Code Blocks */
pre {
  background: var(--surface-hover);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25em;
  font-family: var(--font-mono);
  font-size: 0.9em;
  overflow-x: auto;
}

code {
  font-family: var(--font-mono);
  background: rgba(0, 0, 0, 0.05);
  padding: 0.2em 0.4em;
  border-radius: 4px;
}

[data-theme="dark"] code {
  background: rgba(255, 255, 255, 0.1);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border-hover);
  border-radius: 5px;
  border: 2px solid var(--bg-color);
}

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

/* Status Colors */
.status.success {
  color: hsl(var(--hue-success), 70%, 45%) !important;
}

.status.wrong_answer {
  color: hsl(var(--hue-danger), 80%, 55%) !important;
}

.status.time_limit_exceeded {
  color: hsl(var(--hue-warning), 80%, 45%) !important;
}

.status.runtime_error {
  color: #8b5cf6 !important;
}

/* Violet */
.status.compile_error {
  color: var(--primary-color) !important;
}

.status.waiting {
  color: var(--text-tertiary) !important;
}

/* User Hover Card */
.user-hover-card {
  position: fixed;
  display: none;
  min-width: 280px;
  max-width: 340px;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-xl);
  border-radius: var(--radius-lg);
  padding: 16px;
  z-index: 1000;
  animation: scaleIn 0.2s ease-out;
}

.user-hover-card .uhc-header {
  display: flex;
  align-items: center;
  margin-bottom: 12px;
}

.user-hover-card .uhc-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  margin-right: 12px;
  object-fit: cover;
  border: 2px solid var(--surface-color);
  box-shadow: var(--shadow-sm);
}

.user-hover-card .uhc-name {
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.1em;
}

.user-hover-card .uhc-stats {
  color: var(--text-secondary);
  font-size: 0.9em;
  line-height: 1.5;
}

/* Utilities */
.padding {
  padding: 0 1em;
}

.font-content {
  font-family: var(--font-sans);
}

.markdown-edit {
  font-family: var(--font-mono);
}

/* Responsive */
@media (max-width: 991px) {
  .ui.container {
    padding: 0 1rem;
  }

  .ui.menu {
    overflow-x: auto;
  }

  #menu_toggle {
    display: flex !important;
  }

  .item.computer.only {
    display: none !important;
  }
}