.four-sections {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
}

.drop-section {
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 1rem;
  background: #f9f9f9;
}

.cell-label {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #2c3e50;
}

.drop-cell {
  background: #fff;
  border: 2px dashed #ddd;
  border-radius: 6px;
  padding: 0.5rem;
  min-height: 100px;
}

.placeholder {
  display: block;
  text-align: center;
  color: #aaa;
  font-style: italic;
  margin-top: 0.5rem;
}

.word-group {
  border-radius: 10px;
  padding: 10px 15px;
  margin-bottom: 1rem;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.group-title {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 8px;
  text-align: left;
  color: #333;
}

.group-words {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.word-item {
  background: #fff;
  border-radius: 6px;
  border: 1px solid #ccc;
  padding: 6px 10px;
  cursor: grab;
  transition: transform 0.15s;
}

.word-item:hover {
  transform: scale(1.03);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

/* 1) Opt-in and base tokens */
:root {
  color-scheme: light dark;
  /* lets UA widgets match */
  --primary: #0d6efd;
  --primary-hover: #0056b3;
  --bg: #ffffff;
  --text: #1f2328;
  --muted: #888888;
  --border: #d0d7de;
  --elev: rgba(0, 0, 0, 0.15);
  --elev-strong: rgba(0, 0, 0, 0.20);
}

/* 2) Dark-mode overrides driven by OS/Browser theme */
@media (prefers-color-scheme: dark) {
  :root {
    --primary: #66b0ff;
    --primary-hover: #8cc3ff;
    --bg: #0f1115;
    --text: #e6edf3;
    --muted: #a0a0a0;
    --border: #2d333b;
    --elev: rgba(0, 0, 0, 0.5);
    --elev-strong: rgba(0, 0, 0, 0.6);
  }
}

/* 3) Use tokens in your components */
.help-icon {
  cursor: pointer;
  font-size: 28px;
  position: fixed;
  top: 20px;
  right: 120px;
  z-index: 1001;
  color: var(--primary);
  background: var(--bg);
  border: 1px solid var(--primary);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px var(--elev);
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.help-icon:hover {
  background: var(--primary);
  color: var(--bg);
  border-color: var(--primary-hover);
}

.popup-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .4);
  z-index: 1000;
}

.popup-content {
  background: var(--bg);
  color: var(--text);
  border-radius: 8px;
  max-width: 600px;
  margin: 80px auto;
  padding: 30px;
  position: relative;
  box-shadow: 0 4px 24px var(--elev-strong);
  font-family: Arial, sans-serif;
  border: 1px solid var(--border);
}

.close-btn {
  position: absolute;
  top: 15px;
  right: 15px;
  font-size: 22px;
  cursor: pointer;
  color: var(--muted);
}

.lang-switcher {
  margin-bottom: 18px;
  text-align: right;
}

.lang-switcher button {
  margin-left: 6px;
  padding: 3px 10px;
  border: 1px solid var(--primary);
  background: var(--bg);
  color: var(--primary);
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  text-transform: uppercase;
  font-weight: bold;
}

.lang-switcher button:hover:not(.active) {
  background: var(--primary);
  color: var(--bg);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  border-bottom: 1px solid var(--border);
}

.logo {
  height: 40px;
}

.lang-switch {
  font-weight: bold;
}

:root {
  /* Colors */
  --color-background: rgba(252, 252, 249, 1);
  --color-surface: rgba(255, 255, 253, 1);
  --color-text: rgba(19, 52, 59, 1);
  --color-text-secondary: rgba(98, 108, 113, 1);
  --color-primary: rgba(33, 128, 141, 1);
  --color-primary-hover: rgba(29, 116, 128, 1);
  --color-primary-active: rgba(26, 104, 115, 1);
  --color-secondary: rgba(94, 82, 64, 0.12);
  --color-secondary-hover: rgba(94, 82, 64, 0.2);
  --color-secondary-active: rgba(94, 82, 64, 0.25);
  --color-border: rgba(94, 82, 64, 0.2);
  --color-btn-primary-text: rgba(252, 252, 249, 1);
  --color-card-border: rgba(94, 82, 64, 0.12);
  --color-card-border-inner: rgba(94, 82, 64, 0.12);
  --color-error: rgba(192, 21, 47, 1);
  --color-success: rgba(33, 128, 141, 1);
  --color-warning: rgba(168, 75, 47, 1);
  --color-info: rgba(98, 108, 113, 1);
  --color-focus-ring: rgba(33, 128, 141, 0.4);
  --color-select-caret: rgba(19, 52, 59, 0.8);

  /* German classification colors */
  --color-allowed: rgba(76, 175, 80, 1);
  --color-allowed-bg: rgba(76, 175, 80, 0.1);
  --color-caution: rgba(255, 193, 7, 1);
  --color-caution-bg: rgba(255, 193, 7, 0.1);
  --color-forbidden: rgba(244, 67, 54, 1);
  --color-forbidden-bg: rgba(244, 67, 54, 0.1);

  /* Common style patterns */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  /* RGB versions for opacity control */
  --color-primary-rgb: 33, 128, 141;
  --color-success-rgb: 33, 128, 141;
  --color-error-rgb: 192, 21, 47;
  --color-warning-rgb: 168, 75, 47;
  --color-info-rgb: 98, 108, 113;

  /* Typography */
  --font-family-base: "FKGroteskNeue", "Geist", "Inter", -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-mono: "Berkeley Mono", ui-monospace, SFMono-Regular, Menlo,
    Monaco, Consolas, monospace;
  --font-size-xs: 11px;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 24px;
  --font-size-4xl: 30px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 550;
  --font-weight-bold: 600;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --letter-spacing-tight: -0.01em;

  /* Spacing */
  --space-0: 0;
  --space-1: 1px;
  --space-2: 2px;
  --space-4: 4px;
  --space-6: 6px;
  --space-8: 8px;
  --space-10: 10px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-24: 24px;
  --space-32: 32px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-base: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.04),
    0 2px 4px -1px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04),
    0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.15),
    inset 0 -1px 0 rgba(0, 0, 0, 0.03);

  /* Animation */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);

  /* Wider layout */
  --container-sm: 900px;
  --container-md: 1100px;
  --container-lg: 1400px;
  --container-xl: 1800px;
}

/* Dark mode colors */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: rgba(31, 33, 33, 1);
    --color-surface: rgba(38, 40, 40, 1);
    --color-text: rgba(245, 245, 245, 1);
    --color-text-secondary: rgba(167, 169, 169, 0.7);
    --color-primary: rgba(50, 184, 198, 1);
    --color-primary-hover: rgba(45, 166, 178, 1);
    --color-primary-active: rgba(41, 150, 161, 1);
    --color-secondary: rgba(119, 124, 124, 0.15);
    --color-secondary-hover: rgba(119, 124, 124, 0.25);
    --color-secondary-active: rgba(119, 124, 124, 0.3);
    --color-border: rgba(119, 124, 124, 0.3);
    --color-error: rgba(255, 84, 89, 1);
    --color-success: rgba(50, 184, 198, 1);
    --color-warning: rgba(230, 129, 97, 1);
    --color-info: rgba(167, 169, 169, 1);
    --color-focus-ring: rgba(50, 184, 198, 0.4);
    --color-btn-primary-text: rgba(19, 52, 59, 1);
    --color-card-border: rgba(119, 124, 124, 0.2);
    --color-card-border-inner: rgba(119, 124, 124, 0.15);
    --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
      inset 0 -1px 0 rgba(0, 0, 0, 0.15);
    --button-border-secondary: rgba(119, 124, 124, 0.2);
    --color-border-secondary: rgba(119, 124, 124, 0.2);
    --color-select-caret: rgba(245, 245, 245, 0.8);

    /* German classification colors for dark mode */
    --color-allowed: rgba(129, 199, 132, 1);
    --color-allowed-bg: rgba(129, 199, 132, 0.15);
    --color-caution: rgba(255, 213, 79, 1);
    --color-caution-bg: rgba(255, 213, 79, 0.15);
    --color-forbidden: rgba(255, 138, 128, 1);
    --color-forbidden-bg: rgba(255, 138, 128, 0.15);

    /* Common style patterns - updated for dark mode */
    --focus-ring: 0 0 0 3px var(--color-focus-ring);
    --focus-outline: 2px solid var(--color-primary);
    --status-bg-opacity: 0.15;
    --status-border-opacity: 0.25;
    --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

    /* RGB versions for dark mode */
    --color-primary-rgb: 50, 184, 198;
    --color-success-rgb: 50, 184, 198;
    --color-error-rgb: 255, 84, 89;
    --color-warning-rgb: 230, 129, 97;
    --color-info-rgb: 167, 169, 169;
  }
}

/* Data attribute for manual theme switching */
[data-color-scheme="dark"] {
  --color-background: rgba(31, 33, 33, 1);
  --color-surface: rgba(38, 40, 40, 1);
  --color-text: rgba(245, 245, 245, 1);
  --color-text-secondary: rgba(167, 169, 169, 0.7);
  --color-primary: rgba(50, 184, 198, 1);
  --color-primary-hover: rgba(45, 166, 178, 1);
  --color-primary-active: rgba(41, 150, 161, 1);
  --color-secondary: rgba(119, 124, 124, 0.15);
  --color-secondary-hover: rgba(119, 124, 124, 0.25);
  --color-secondary-active: rgba(119, 124, 124, 0.3);
  --color-border: rgba(119, 124, 124, 0.3);
  --color-error: rgba(255, 84, 89, 1);
  --color-success: rgba(50, 184, 198, 1);
  --color-warning: rgba(230, 129, 97, 1);
  --color-info: rgba(167, 169, 169, 1);
  --color-focus-ring: rgba(50, 184, 198, 0.4);
  --color-btn-primary-text: rgba(19, 52, 59, 1);
  --color-card-border: rgba(119, 124, 124, 0.15);
  --color-card-border-inner: rgba(119, 124, 124, 0.15);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
    inset 0 -1px 0 rgba(0, 0, 0, 0.15);
  --color-border-secondary: rgba(119, 124, 124, 0.2);
  --color-select-caret: rgba(245, 245, 245, 0.8);

  /* German classification colors for dark mode */
  --color-allowed: rgba(129, 199, 132, 1);
  --color-allowed-bg: rgba(129, 199, 132, 0.15);
  --color-caution: rgba(255, 213, 79, 1);
  --color-caution-bg: rgba(255, 213, 79, 0.15);
  --color-forbidden: rgba(255, 138, 128, 1);
  --color-forbidden-bg: rgba(255, 138, 128, 0.15);

  /* Common style patterns - updated for dark mode */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  /* RGB versions for dark mode */
  --color-primary-rgb: 50, 184, 198;
  --color-success-rgb: 50, 184, 198;
  --color-error-rgb: 255, 84, 89;
  --color-warning-rgb: 230, 129, 97;
  --color-info-rgb: 167, 169, 169;
}

[data-color-scheme="light"] {
  --color-background: rgba(252, 252, 249, 1);
  --color-surface: rgba(255, 255, 253, 1);
  --color-text: rgba(19, 52, 59, 1);
  --color-text-secondary: rgba(98, 108, 113, 1);
  --color-primary: rgba(33, 128, 141, 1);
  --color-primary-hover: rgba(29, 116, 128, 1);
  --color-primary-active: rgba(26, 104, 115, 1);
  --color-secondary: rgba(94, 82, 64, 0.12);
  --color-secondary-hover: rgba(94, 82, 64, 0.2);
  --color-secondary-active: rgba(94, 82, 64, 0.25);
  --color-border: rgba(94, 82, 64, 0.2);
  --color-btn-primary-text: rgba(252, 252, 249, 1);
  --color-card-border: rgba(94, 82, 64, 0.12);
  --color-card-border-inner: rgba(94, 82, 64, 0.12);
  --color-error: rgba(192, 21, 47, 1);
  --color-success: rgba(33, 128, 141, 1);
  --color-warning: rgba(168, 75, 47, 1);
  --color-info: rgba(98, 108, 113, 1);
  --color-focus-ring: rgba(33, 128, 141, 0.4);

  /* German classification colors for light mode */
  --color-allowed: rgba(76, 175, 80, 1);
  --color-allowed-bg: rgba(76, 175, 80, 0.1);
  --color-caution: rgba(255, 193, 7, 1);
  --color-caution-bg: rgba(255, 193, 7, 0.1);
  --color-forbidden: rgba(244, 67, 54, 1);
  --color-forbidden-bg: rgba(244, 67, 54, 0.1);

  /* RGB versions for light mode */
  --color-primary-rgb: 33, 128, 141;
  --color-success-rgb: 33, 128, 141;
  --color-error-rgb: 192, 21, 47;
  --color-warning-rgb: 168, 75, 47;
  --color-info-rgb: 98, 108, 113;
}

/* Base styles */
html {
  font-size: var(--font-size-base);
  font-family: var(--font-family-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  /* margin: 0; */
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
  text-align: center;
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-md);
}

p {
  margin: 0 0 var(--space-16) 0;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}

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

code,
pre {
  font-family: var(--font-family-mono);
  font-size: calc(var(--font-size-base) * 0.95);
  background-color: var(--color-secondary);
  border-radius: var(--radius-sm);
}

code {
  padding: var(--space-1) var(--space-4);
}

pre {
  padding: var(--space-16);
  margin: var(--space-16) 0;
  overflow: auto;
  border: 1px solid var(--color-border);
}

pre code {
  background: none;
  padding: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-base);
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1.5;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  border: none;
  text-decoration: none;
  position: relative;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

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

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

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

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

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

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

.btn--danger {
  background: #dc3545;
  color: white;
  border: 1px solid #dc3545;
}

.btn--danger:hover {
  background: #c82333;
  border-color: #bd2130;
}

.btn--danger:active {
  background: #bd2130;
  border-color: #b21e2f;
}

.btn--outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn--sm {
  padding: var(--space-4) var(--space-12);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

.btn--lg {
  padding: var(--space-10) var(--space-20);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-md);
}

.btn--full-width {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Form elements */
.form-control {
  display: block;
  width: 100%;
  padding: var(--space-8) var(--space-12);
  font-size: var(--font-size-md);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  transition: border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

textarea.form-control {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
}

select.form-control {
  padding: var(--space-8) var(--space-12);
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: var(--select-caret-light);
  background-repeat: no-repeat;
  background-position: right var(--space-12) center;
  background-size: 16px;
  padding-right: var(--space-32);
}

/* Add a dark mode specific caret */
@media (prefers-color-scheme: dark) {
  select.form-control {
    background-image: var(--select-caret-dark);
  }
}

/* Also handle data-color-scheme */
[data-color-scheme="dark"] select.form-control {
  background-image: var(--select-caret-dark);
}

[data-color-scheme="light"] select.form-control {
  background-image: var(--select-caret-light);
}

.form-control:focus {
  border-color: var(--color-primary);
  outline: var(--focus-outline);
}

.form-label {
  display: block;
  margin-bottom: var(--space-8);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.form-group {
  margin-bottom: var(--space-16);
}

/* Card component */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--duration-normal) var(--ease-standard);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card__body {
  padding: var(--space-16);
}

.card__header,
.card__footer {
  padding: var(--space-16);
  border-bottom: 1px solid var(--color-card-border-inner);
}

/* Status indicators - simplified with CSS variables */
.status {
  display: inline-flex;
  align-items: center;
  padding: var(--space-6) var(--space-12);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.status--success {
  background-color: rgba(var(--color-success-rgb, 33, 128, 141),
      var(--status-bg-opacity));
  color: var(--color-success);
  border: 1px solid rgba(var(--color-success-rgb, 33, 128, 141), var(--status-border-opacity));
}

.status--error {
  background-color: rgba(var(--color-error-rgb, 192, 21, 47),
      var(--status-bg-opacity));
  color: var(--color-error);
  border: 1px solid rgba(var(--color-error-rgb, 192, 21, 47), var(--status-border-opacity));
}

.status--warning {
  background-color: rgba(var(--color-warning-rgb, 168, 75, 47),
      var(--status-bg-opacity));
  color: var(--color-warning);
  border: 1px solid rgba(var(--color-warning-rgb, 168, 75, 47), var(--status-border-opacity));
}

.status--info {
  background-color: rgba(var(--color-info-rgb, 98, 108, 113),
      var(--status-bg-opacity));
  color: var(--color-info);
  border: 1px solid rgba(var(--color-info-rgb, 98, 108, 113), var(--status-border-opacity));
}

/* Container layout */
.container {
  width: 100%;
  margin-right: auto;
  margin-left: auto;
  padding-right: var(--space-16);
  padding-left: var(--space-16);
}

@media (min-width: 640px) {
  .container {
    max-width: var(--container-sm);
  }
}

@media (min-width: 768px) {
  .container {
    max-width: var(--container-md);
  }
}

@media (min-width: 1024px) {
  .container {
    max-width: var(--container-lg);
  }
}

@media (min-width: 1280px) {
  .container {
    max-width: var(--container-xl);
  }
}

/* Utility classes */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

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

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-4 {
  gap: var(--space-4);
}

.gap-8 {
  gap: var(--space-8);
}

.gap-16 {
  gap: var(--space-16);
}

.m-0 {
  margin: 0;
}

.mt-8 {
  margin-top: var(--space-8);
}

.mb-8 {
  margin-bottom: var(--space-8);
}

.mx-8 {
  margin-left: var(--space-8);
  margin-right: var(--space-8);
}

.my-8 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

.p-0 {
  padding: 0;
}

.py-8 {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

.px-8 {
  padding-left: var(--space-8);
  padding-right: var(--space-8);
}

.py-16 {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.px-16 {
  padding-left: var(--space-16);
  padding-right: var(--space-16);
}

.block {
  display: block;
}

.hidden {
  display: none;
}

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

/* Dark mode specifics */
[data-color-scheme="dark"] .btn--outline {
  border: 1px solid var(--color-border-secondary);
}

@font-face {
  font-family: 'FKGroteskNeue';
  src: url('https://r2cdn.perplexity.ai/fonts/FKGroteskNeue.woff2') format('woff2');
}

/* Additional styles for the AI Tools Categorizer */

.header {
  text-align: center;
  margin-bottom: var(--space-32);
  padding: var(--space-24) 0;
  border-bottom: 1px solid var(--color-border);
}

.header h1 {
  margin-bottom: var(--space-8);
  color: var(--color-text);
}

.header p {
  color: var(--color-text-secondary);
  margin: 0;
}

.course-info {
  margin-bottom: var(--space-32);
}

.course-info h2 {
  margin-bottom: var(--space-16);
  text-align: center;
}

.course-fields {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-16);
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: var(--space-16);
}

.instructions {
  background-color: var(--color-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-16);
  margin-bottom: var(--space-32);
}

.instructions-content h3 {
  margin-bottom: var(--space-12);
  color: var(--color-text);
}

.instructions-content ul {
  margin: 0;
  padding-left: var(--space-20);
}

.instructions-content li {
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
}

.word-section {
  margin-bottom: var(--space-32);
}

.word-section h2 {
  margin-bottom: var(--space-16);
  text-align: center;
}

.words-container {
  /* display: flex; */
  flex-wrap: wrap;
  gap: var(--space-12);
  justify-content: center;
  padding: var(--space-16);
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

/* Base word styling - used for both preset and editable words */
.word {
  display: inline-block;
  padding: var(--space-8) var(--space-12);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  cursor: grab;
  user-select: none;
  font-weight: var(--font-weight-medium);
  transition: all var(--duration-normal) var(--ease-standard);
  min-width: 80px;
  text-align: center;
  color: var(--color-text);
  box-shadow: var(--shadow-xs);
  margin-inline: 0.2rem;
}

/* Editable word styling for empty state */
.word.editable.empty {
  border: 2px dashed var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  cursor: text;
  box-shadow: none;
}

/* Editable word styling for non-empty state */
.word.editable:not(.empty) {
  cursor: grab;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);
}

.word-item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-surface);
  color: var(--color-text);
  border-radius: var(--radius-base);
  cursor: grab;
  user-select: none;
  font-weight: var(--font-weight-medium);
  transition: all var(--duration-normal) var(--ease-standard);
  border: 1px solid var(--color-border);
  min-width: 80px;
  text-align: center;
  box-shadow: var(--shadow-xs);
}

.word-item.custom:hover,
.word:not(.empty):hover {
  background-color: var(--color-secondary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
  border-color: var(--color-text-secondary);
}

.word-item.dragging,
.word.dragging {
  opacity: 0.6;
  cursor: grabbing;
  transform: rotate(2deg) scale(0.95);
  box-shadow: var(--shadow-lg);
}

.word.custom,
.word-item.custom {
  background-color: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

/* Preset AI tools styling - light gray theme */
.word-item:not(.custom) {
  background-color: #f8f9fa;
  color: #495057;
  border: 1px solid #dee2e6;
  box-shadow: var(--shadow-xs);
}

.word-item:not(.custom):hover {
  background-color: #e9ecef;
  border-color: #adb5bd;
  color: #343a40;
}

/* Dark mode styling for preset words */
@media (prefers-color-scheme: dark) {
  .word-item:not(.custom) {
    background-color: #343a40;
    color: #f8f9fa;
    border: 1px solid #495057;
  }

  .word-item:not(.custom):hover {
    background-color: #495057;
    border-color: #6c757d;
    color: #ffffff;
  }
}

[data-color-scheme="dark"] .word-item:not(.custom) {
  background-color: #343a40;
  color: #f8f9fa;
  border: 1px solid #495057;
}

[data-color-scheme="dark"] .word-item:not(.custom):hover {
  background-color: #495057;
  border-color: #6c757d;
  color: #ffffff;
}

.table-section {
  margin-bottom: var(--space-32);
}

.table-section h2 {
  margin-bottom: var(--space-16);
  text-align: center;
}

/* === SWOT TABLE STYLE (4 SECTIONS) === */

.table-container.four-sections {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  /* 2 per row */
  gap: var(--space-16);
  margin-top: var(--space-16);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-sm);
  padding: var(--space-16);
}

/* Responsive collapse to 1 column on mobile */
@media (max-width: 768px) {
  .table-container.four-sections {
    grid-template-columns: 1fr;
  }
}

/* Base block */
.drop-section {
  border-radius: var(--radius-base);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);
  transition: transform var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

.drop-section:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.drop-section .cell-label {
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  border-bottom: 2px solid currentColor;
  margin-bottom: var(--space-8);
  text-align: center;
}

/* === Individual colors (with background) === */
.cell-strength {
  border-top: 4px solid #388e3c;
  /* darker green top border */
  background: linear-gradient(180deg, #e8f5e9 0%, #c8e6c9 100%);
}

.cell-strength .cell-label {
  color: #1b5e20;
}

.cell-weakness {
  border-top: 4px solid #ef6c00;
  /* darker orange */
  background: linear-gradient(180deg, #fff3e0 0%, #ffe0b2 100%);
}

.cell-weakness .cell-label {
  color: #e65100;
}

.cell-opportunity {
  border-top: 4px solid #1976d2;
  /* darker blue */
  background: linear-gradient(180deg, #e3f2fd 0%, #bbdefb 100%);
}

.cell-opportunity .cell-label {
  color: #0d47a1;
}

.cell-threat {
  border-top: 4px solid #7b1fa2;
  /* darker purple */
  background: linear-gradient(180deg, #f3e5f5 0%, #e1bee7 100%);
}

.cell-threat .cell-label {
  color: #4a148c;
}

/* === Drop zones === */
.drop-cell {
  background: var(--color-surface);
  border-radius: var(--radius-base);
  border: 2px dashed var(--color-border);
  padding: var(--space-12);
  min-height: 120px;
  transition: all var(--duration-fast) var(--ease-standard);
}

.drop-cell:hover {
  border-color: var(--color-primary);
}

.drop-zone {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  min-height: 100px;
  transition: all var(--duration-fast) var(--ease-standard);
}

.drop-zone.drag-over {
  background-color: rgba(var(--color-primary-rgb), 0.1);
  border: 2px dashed var(--color-primary);
  border-radius: var(--radius-base);
}

/* === Dropped items === */
.dropped-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  width: 100%;
}

.dropped-word {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border-inner);
  border-left: 4px solid var(--color-border);
  padding: var(--space-8) var(--space-12);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all var(--duration-fast) var(--ease-standard);
  box-shadow: var(--shadow-xs);
}

.dropped-word:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-sm);
}

/* Colored accents per section */
.cell-strength .dropped-word {
  border-left-color: #4caf50;
}

.cell-weakness .dropped-word {
  border-left-color: #ff9800;
}

.cell-opportunity .dropped-word {
  border-left-color: #2196f3;
}

.cell-threat .dropped-word {
  border-left-color: #9c27b0;
}

.placeholder {
  text-align: center;
  color: var(--color-text-secondary);
  font-style: italic;
  font-size: var(--font-size-xs);
  margin-top: var(--space-8);
}

/* Dark mode tuning */
@media (prefers-color-scheme: dark) {
  .cell-strength {
    border-top-color: #81c784;
  }

  .cell-weakness {
    border-top-color: #ffb74d;
  }

  .cell-opportunity {
    border-top-color: #64b5f6;
  }

  .cell-threat {
    border-top-color: #ba68c8;
  }

  .cell-strength .cell-label {
    color: #81c784;
  }

  .cell-weakness .cell-label {
    color: #ffb74d;
  }

  .cell-opportunity .cell-label {
    color: #64b5f6;
  }

  .cell-threat .cell-label {
    color: #ba68c8;
  }

  .drop-cell {
    background: var(--color-surface);
    border-color: var(--color-border);
  }
}

.placeholder {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
  text-align: center;
  pointer-events: none;
  padding: var(--space-4);
  line-height: 1.2;
  width: 90%;
}

.dropped-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  width: 100%;
  flex-grow: 1;
}

.dropped-items:not(:empty)+.placeholder {
  display: none;
}

.dropped-word {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6) var(--space-8);
  background-color: var(--color-surface);
  color: var(--color-text);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: grab;
  /* Indicate draggable */
  transition: all var(--duration-fast) var(--ease-standard);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);
  text-transform: none;
  letter-spacing: normal;
  margin: 2px;
  position: relative;
  min-width: 80px;
}

.dropped-word.dragging {
  cursor: grabbing;
  opacity: 0.6;
  transform: rotate(2deg) scale(0.95);
  box-shadow: var(--shadow-lg);
}

.dropped-word-text {
  flex: 1;
  margin-right: var(--space-4);
  pointer-events: none;
  /* Prevent text selection while dragging */
}

.remove-button {
  display: none;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border: none;
  background-color: var(--color-error);
  color: white;
  border-radius: 50%;
  font-size: 14px;
  font-weight: bold;
  line-height: 1;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
  padding: 0;
  margin-left: var(--space-4);
  flex-shrink: 0;
}

.remove-button:hover {
  background-color: #d32f2f;
  transform: scale(1.1);
}

.dropped-word:hover .remove-button {
  display: flex;
}

.dropped-word:hover:not(.dragging) {
  background-color: var(--color-secondary);
  transform: scale(1.02);
  box-shadow: var(--shadow-sm);
  padding-right: var(--space-6);
  /* Adjust padding when button is visible */
}

/* Dark mode styling for remove button */
@media (prefers-color-scheme: dark) {
  .remove-button {
    background-color: var(--color-error);
  }

  .remove-button:hover {
    background-color: #ff5252;
  }
}

[data-color-scheme="dark"] .remove-button {
  background-color: var(--color-error);
}

[data-color-scheme="dark"] .remove-button:hover {
  background-color: #ff5252;
}

/* Cell-specific border colors for dropped words */
.cell-allowed .dropped-word {
  border-left: 3px solid #4caf50;
  background-color: rgba(76, 175, 80, 0.05);
}

.cell-caution .dropped-word {
  border-left: 3px solid #ff9800;
  background-color: rgba(255, 152, 0, 0.05);
}

.cell-forbidden .dropped-word {
  border-left: 3px solid #f44336;
  background-color: rgba(244, 67, 54, 0.05);
}

/* Hover states for cell-specific colors */
.cell-allowed .dropped-word:hover {
  background-color: rgba(76, 175, 80, 0.1);
  border-left-color: #388e3c;
}

.cell-caution .dropped-word:hover {
  background-color: rgba(255, 152, 0, 0.1);
  border-left-color: #f57c00;
}

.cell-forbidden .dropped-word:hover {
  background-color: rgba(244, 67, 54, 0.1);
  border-left-color: #d32f2f;
}

/* Dark mode styling for dropped words */
@media (prefers-color-scheme: dark) {
  .cell-allowed .dropped-word {
    background-color: rgba(129, 199, 132, 0.1);
  }

  .cell-caution .dropped-word {
    background-color: rgba(255, 213, 79, 0.1);
  }

  .cell-forbidden .dropped-word {
    background-color: rgba(255, 138, 128, 0.1);
  }

  .cell-allowed .dropped-word:hover {
    background-color: rgba(129, 199, 132, 0.15);
  }

  .cell-caution .dropped-word:hover {
    background-color: rgba(255, 213, 79, 0.15);
  }

  .cell-forbidden .dropped-word:hover {
    background-color: rgba(255, 138, 128, 0.15);
  }
}

[data-color-scheme="dark"] .cell-allowed .dropped-word {
  background-color: rgba(129, 199, 132, 0.1);
}

[data-color-scheme="dark"] .cell-caution .dropped-word {
  background-color: rgba(255, 213, 79, 0.1);
}

[data-color-scheme="dark"] .cell-forbidden .dropped-word {
  background-color: rgba(255, 138, 128, 0.1);
}

[data-color-scheme="dark"] .cell-allowed .dropped-word:hover {
  background-color: rgba(129, 199, 132, 0.15);
}

[data-color-scheme="dark"] .cell-caution .dropped-word:hover {
  background-color: rgba(255, 213, 79, 0.15);
}

[data-color-scheme="dark"] .cell-forbidden .dropped-word:hover {
  background-color: rgba(255, 138, 128, 0.15);
}

.controls {
  display: flex;
  gap: var(--space-16);
  justify-content: center;
  margin-bottom: var(--space-32);
  align-items: center;
}

.controls .btn--danger {
  margin-right: var(--space-24);
}

.message {
  position: fixed;
  top: var(--space-20);
  right: var(--space-20);
  padding: var(--space-12) var(--space-16);
  border-radius: var(--radius-base);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  opacity: 0;
  transform: translateX(100%);
  transition: all var(--duration-normal) var(--ease-standard);
  z-index: 1000;
}

.message.show {
  opacity: 1;
  transform: translateX(0);
}

.message.success {
  background-color: rgba(var(--color-success-rgb), 0.1);
  color: var(--color-success);
  border: 1px solid rgba(var(--color-success-rgb), 0.3);
}

.message.error {
  background-color: rgba(var(--color-error-rgb), 0.1);
  color: var(--color-error);
  border: 1px solid rgba(var(--color-error-rgb), 0.3);
}

.message.info {
  background-color: rgba(var(--color-info-rgb), 0.1);
  color: var(--color-info);
  border: 1px solid rgba(var(--color-info-rgb), 0.3);
}

/* Site Footer */
.site-footer {
  margin-top: var(--space-32);
  padding: var(--space-24) 0;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface);
}

.footer-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.footer-date {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

.footer-attribution {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: 0;
  font-style: italic;
}

.footer-attribution a {
  color: var(--color-primary);
  text-decoration: none;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .course-fields {
    grid-template-columns: 1fr;
  }

  .words-container {
    gap: var(--space-8);
  }

  .word-item,
  .word {
    min-width: 70px;
    padding: var(--space-8) var(--space-12);
    font-size: var(--font-size-sm);
  }

  .category-table {
    min-width: 600px;
  }

  .column-header,
  .drop-cell {
    width: 150px;
  }

  .drop-cell {
    height: 100px;
  }

  .row-header {
    width: 100px;
    font-size: var(--font-size-xs);
  }

  .controls {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 200px;
  }
}

/* Animation for drag and drop */
@keyframes dropSuccess {
  0% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.1);
  }

  100% {
    transform: scale(1);
  }
}

.dropped-word.just-dropped {
  animation: dropSuccess 0.3s ease-out;
}

/* Scrollbar styling */
.table-container::-webkit-scrollbar {
  height: 8px;
}

.table-container::-webkit-scrollbar-track {
  background: var(--color-secondary);
  border-radius: var(--radius-sm);
}

.table-container::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-sm);
}

.table-container::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-secondary);
}

/* PDF Export Styles */
.pdf-container {
  position: absolute;
  top: -9999px;
  left: -9999px;
  width: 210mm;
  /* A4 width */
  background: white;
  color: black;
  font-family: Arial, sans-serif;
  padding: 20mm;
  box-sizing: border-box;
}

.pdf-header {
  text-align: center;
  margin-bottom: 30px;
  border-bottom: 2px solid #333;
  padding-bottom: 20px;
}

.pdf-header h1 {
  font-size: 24px;
  color: #333;
  margin-bottom: 10px;
  line-height: 1.3;
}

.pdf-header .course-info {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  margin-top: 20px;
}

.pdf-header .course-info>div {
  text-align: center;
}

.pdf-header .course-info strong {
  display: block;
  font-weight: bold;
  color: #555;
  margin-bottom: 5px;
}

.pdf-table-section {
  margin: 30px 0;
}

.pdf-table-section h2 {
  font-size: 18px;
  color: #333;
  margin-bottom: 20px;
  text-align: center;
}

.pdf-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 12px;
}

.pdf-table th,
.pdf-table td {
  border: 2px solid #333;
  padding: 12px;
  text-align: left;
  vertical-align: top;
  min-height: 60px;
}

.pdf-table th {
  background-color: #f5f5f5;
  font-weight: bold;
  text-align: center;
  font-size: 14px;
  color: #333;
}

.pdf-table .column-allowed {
  background-color: #e8f5e8;
  color: #2e7d32;
}

.pdf-table .column-caution {
  background-color: #fff8e1;
  color: #f57c00;
}

.pdf-table .column-forbidden {
  background-color: #ffebee;
  color: #d32f2f;
}

.pdf-cell-label {
  font-weight: bold;
  margin-bottom: 8px;
  display: block;
  font-size: 12px;
  color: #000;
}

.pdf-cell-items {
  line-height: 1.4;
}

.pdf-cell-item {
  margin-bottom: 4px;
  padding: 2px 0;
  border-bottom: 1px dotted #ccc;
}

.pdf-cell-item:last-child {
  border-bottom: none;
}

.pdf-empty-cell {
  background-color: #f9f9f9;
  text-align: center;
  color: #999;
  font-style: italic;
}

.pdf-footer {
  margin-top: 30px;
  text-align: center;
  font-size: 10px;
  color: #666;
  border-top: 1px solid #ddd;
  padding-top: 15px;
}

/* PDF Legend styling */
.pdf-legend {
  margin: 20px 0 30px 0;
  padding: 15px;
  background-color: #f8f9fa;
  border: 1px solid #e0e0e0;
  border-radius: 6px;
}

.pdf-legend h3 {
  margin: 0 0 10px 0;
  font-size: 14px;
  font-weight: bold;
  color: #333;
}

.pdf-legend-items {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.pdf-legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: #555;
}

.pdf-legend-icon {
  font-size: 16px;
}

.pdf-legend-text {
  white-space: nowrap;
}

/* Icon section styling */
.icon-section {
  margin: var(--space-16) 0;
  padding: var(--space-12);
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-xs);
}

.icon-container {
  display: flex;
  gap: var(--space-12);
  justify-content: center;
  flex-wrap: wrap;
}

.icon-item {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-8);
  padding: var(--space-8) var(--space-12);
  background: var(--color-background);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: grab;
  transition: all var(--duration-normal) var(--ease-standard);
  min-width: auto;
  text-align: left;
}

.icon-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.icon-item.dragging {
  opacity: 0.7;
  transform: scale(0.95);
  cursor: grabbing;
}

.icon-symbol {
  font-size: 20px;
  line-height: 1;
  flex-shrink: 0;
}

.icon-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  font-weight: 500;
  white-space: nowrap;
}

/* Dark mode styling for icon section */
@media (prefers-color-scheme: dark) {
  .icon-item {
    background: var(--color-surface);
    border-color: var(--color-border);
  }

  .icon-item:hover {
    border-color: var(--color-primary);
    background: var(--color-background);
  }
}

[data-color-scheme="dark"] .icon-item {
  background: var(--color-surface);
  border-color: var(--color-border);
}

[data-color-scheme="dark"] .icon-item:hover {
  border-color: var(--color-primary);
  background: var(--color-background);
}

/* Icon badges on dropped words */

.word-icons {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-left: 6px;
}

.word-icon-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  font-size: 12px;
  margin-left: 4px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.word-icon-badge.pen {
  background-color: #e3f2fd;
  border: 1px solid #2196f3;
}

.word-icon-badge.pin {
  background-color: #fff3e0;
  border: 1px solid #ff9800;
}

.word-icon-badge:hover {
  transform: scale(1.1);
  box-shadow: 0 0 3px rgba(0, 0, 0, 0.2);
}


/* Icon drop target styling */
.icon-drop-target {
  position: relative;
  border: 2px dashed var(--color-primary) !important;
  background-color: rgba(var(--color-primary-rgb), 0.1) !important;
  transform: scale(1.02);
  z-index: 10;
}

.icon-drop-target::before {
  content: attr(data-drop-icon);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-primary);
  color: white;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  white-space: nowrap;
  z-index: 11;
  pointer-events: none;
}

/* Dynamic drop indicator based on dragged icon */
body[data-dragging-icon="pen"] .icon-drop-target::before {
  content: '+🖋️';
}

body[data-dragging-icon="pin"] .icon-drop-target::before {
  content: '+📌';
}

/* Visual feedback during icon drag */
body.dragging-icon .dropped-word {
  cursor: copy;
}

body.dragging-icon .dropped-word.icon-drop-target {
  cursor: copy;
}

/* Prevent drop zones from reacting to icon drags */
body.dragging-icon .drop-zone {
  pointer-events: none;
}

body.dragging-icon .dropped-word {
  pointer-events: auto;
}

/* Icon drag state styling */
body.dragging-icon .dropped-word:not(.icon-drop-target) {
  opacity: 0.6;
  filter: grayscale(0.2);
}

body.dragging-icon .dropped-word:not(.icon-drop-target)::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border: 1px dashed rgba(var(--color-primary-rgb), 0.3);
  border-radius: inherit;
  pointer-events: none;
}

body.dragging-icon {
  cursor: copy;
}

/* Dark mode styling for icon interactions */
@media (prefers-color-scheme: dark) {
  .word-icon-badge.pen {
    background-color: rgba(33, 150, 243, 0.2);
    border-color: #2196f3;
  }

  .word-icon-badge.pin {
    background-color: rgba(255, 152, 0, 0.2);
    border-color: #ff9800;
  }

  .icon-drop-target {
    background-color: rgba(var(--color-primary-rgb), 0.15) !important;
  }
}

[data-color-scheme="dark"] .word-icon-badge.pen {
  background-color: rgba(33, 150, 243, 0.2);
  border-color: #2196f3;
}

[data-color-scheme="dark"] .word-icon-badge.pin {
  background-color: rgba(255, 152, 0, 0.2);
  border-color: #ff9800;
}

[data-color-scheme="dark"] .icon-drop-target {
  background-color: rgba(var(--color-primary-rgb), 0.15) !important;
}

.layout-container {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: var(--space-32);
  margin-top: var(--space-32);
  margin-bottom: var(--space-32);
}

.left-panel {
  /* flex: 1; */
  /* instead of fixed width */
  max-width: 50%;
  /* takes 45% of available width */
  min-width: 300px;
  overflow-y: auto;
  max-height: 85vh;
}

.right-panel {
  flex: 1.2;
  /* a bit wider than left panel */
  max-width: 50%;
  /* limit so it doesn’t stretch too much */
  position: sticky;
  top: 100px;
}

.right-panel {
  position: relative;
  top: auto;

}

@media (max-width: 1200px) {
  .left-panel {
    max-width: 45%;
  }

  .right-panel {
    max-width: 55%;
  }
}

@media (max-width: 900px) {
  .layout-container {
    flex-direction: column;
  }

  .left-panel,
  .right-panel {
    max-width: 100%;
  }
}