/* main.css: Modern POS Tagger Design System */
:root {
  --color-primary: #4361ee;
  --color-primary-light: #4895ef;
  --color-primary-dark: #3a0ca3;
  --color-secondary: #4cc9f0;
  --color-secondary-light: #72efdd;
  --color-secondary-dark: #3f8efc;
  --color-accent: #f72585;
  --color-accent-light: #ff8fab;
  --color-accent-dark: #b5179e;
  --color-success: #4caf50;
  --color-error: #f44336;
  --color-neutral-50: #f8fafc;
  --color-neutral-100: #f1f5f9;
  --color-neutral-200: #e2e8f0;
  --color-neutral-300: #cbd5e1;
  --color-neutral-400: #94a3b8;
  --color-neutral-500: #64748b;
  --color-neutral-600: #475569;
  --color-neutral-700: #334155;
  --color-neutral-800: #1e293b;
  --color-neutral-900: #0f172a;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --shadow-md: 0 4px 6px -1px rgba(67, 97, 238, 0.08),
    0 2px 4px -1px rgba(67, 97, 238, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(67, 97, 238, 0.1),
    0 4px 6px -2px rgba(67, 97, 238, 0.05);

  /* Legacy variables for backward compatibility */
  --primary-color: var(--color-primary);
  --secondary-color: var(--color-secondary);
  --success-color: var(--color-success);
  --error-color: var(--color-error);
  --text-color: var(--color-neutral-800);
  --background-color: var(--color-neutral-50);
  --border-color: var(--color-neutral-200);
  --info-color: var(--color-primary);
  --hint-color: var(--color-neutral-600);
  --pane-bg: #fff;
  --pane-border: var(--color-neutral-200);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--color-neutral-800);
  background-color: var(--color-neutral-50);
  font-size: 0.97em;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Ensure all elements inherit the same font family */
* {
  font-family: inherit;
}

/* Comprehensive Font Inheritance - Ensure all text elements use the same font */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: inherit !important;
}

p,
div,
span,
label,
li,
td,
th,
a {
  font-family: inherit !important;
}

input,
button,
select,
textarea,
option {
  font-family: inherit !important;
}

table,
tbody,
thead,
tfoot,
tr {
  font-family: inherit !important;
}

/* Simulation-specific elements */
.step-heading,
.step-title,
.step-explanation {
  font-family: inherit !important;
}

.result-heading,
.instruction-step,
.step-number {
  font-family: inherit !important;
}

.instructions-list,
.instructions-list li {
  font-family: inherit !important;
}

.primary-button,
.secondary-button,
.sim-button {
  font-family: inherit !important;
}

.pane-label,
.info-icon,
.toggle-btn {
  font-family: inherit !important;
}

.example-pos-sentence,
.tag-sample {
  font-family: inherit !important;
}

.pos-tag-legend,
.pos-tag-legend h3 {
  font-family: inherit !important;
}

#result-content,
#result-demo-output,
#demo-sentence-output {
  font-family: inherit !important;
}

#accuracy_ans,
.error-message,
.loading {
  font-family: inherit !important;
}

.container {
  width: 90vw;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
}

h1,
.experiment-title {
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--color-primary-dark);
  text-align: center;
  margin: 1.2rem 0 0.8rem 0;
  letter-spacing: 0.01em;
  line-height: 1.1;
}
h2 {
  font-size: 2rem;
  font-weight: 700;
  margin: 1rem 0 0.6rem 0;
}
h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin: 0.8rem 0 0.4rem 0;
}

/* 2-Pane Layout */
.three-pane-layout {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  box-sizing: border-box;
  display: grid;
  grid-template-columns: 39% 59%;
  grid-template-rows: auto auto;
  gap: 1rem 2%;
  justify-items: stretch;
}
.pane {
  box-sizing: border-box;
  width: 100%;
  overflow-wrap: break-word;
  padding: 0.5rem 0.3rem;
  box-shadow: var(--shadow-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--pane-border);
  margin: 0 auto;
  background: var(--pane-bg);
}
.pane-left {
  grid-column: 1;
  grid-row: 1;
  min-width: 0;
  max-width: 100%;
  width: 100%;
  box-sizing: border-box;
}
.pane-middle {
  grid-column: 1;
  grid-row: 2;
  min-width: 0;
  max-width: 100%;
  width: 100%;
  box-sizing: border-box;
  margin-top: 0.5rem;
}
.pane-right {
  grid-column: 2;
  grid-row: 1 / span 2;
  min-width: 0;
  width: 100%;
  box-sizing: border-box;
}
.pane-label {
  margin-top: 0.5rem;
  margin-bottom: 0.2rem;
  font-size: 0.9em;
  font-weight: 600;
  color: var(--color-primary-dark);
}

/* Info Icon and Tooltip */
.info-icon {
  color: var(--color-primary-dark);
  margin-left: 0.5rem;
  cursor: pointer;
  position: relative;
  display: inline-flex;
  align-items: center;
  background: var(--color-secondary-light);
  border-radius: 50%;
  width: 1.3em;
  height: 1.3em;
  text-align: center;
  line-height: 1.3em;
  font-weight: bold;
  border: 1px solid var(--color-primary-light);
  font-size: 0.9rem;
  justify-content: center;
}
.info-icon:focus {
  outline: 2px solid var(--color-primary);
}

/* Instructions Panel */
.instructions-panel {
  width: 100%;
  max-width: 100%;
  margin: 0.6rem auto 0.8rem auto;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  padding: 0;
  border-radius: 0;
}
.instructions-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0.6rem 1rem;
  background: linear-gradient(
    90deg,
    var(--color-secondary-light) 0%,
    var(--color-primary-light) 100%
  );
  border-bottom: 1px solid var(--color-neutral-200);
  cursor: pointer;
  transition: background 0.2s;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.instructions-header:hover {
  background: linear-gradient(
    90deg,
    var(--color-secondary) 0%,
    var(--color-primary) 100%
  );
}
.instructions-header h3 {
  margin: 0;
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: 1.15em;
}
.arrow-icon {
  color: var(--color-primary-dark);
  font-size: 1rem;
  transition: transform 0.3s ease;
}
.instructions-panel:not(.collapsed) .arrow-icon {
  transform: rotate(180deg);
}
.toggle-btn {
  background: none;
  border: none;
  color: var(--color-primary-dark);
  cursor: pointer;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.2s;
}
.toggle-btn:hover {
  background-color: rgba(67, 97, 238, 0.1);
  transform: translateY(-1px);
}
.instructions-content {
  padding: 0.4rem 0.3rem;
  max-width: 100%;
  width: 100%;
  box-sizing: border-box;
  background: var(--color-neutral-100);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: 0 2px 8px rgba(67, 97, 238, 0.04);
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1),
    opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  opacity: 1;
  max-height: 400px;
}
.instructions-content.collapsed {
  display: block;
  opacity: 0;
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1),
    opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.instructions-list {
  list-style: disc inside;
  margin: 0.2em 0 0.2em 1em;
  padding: 0;
  font-size: 1em;
  color: var(--color-neutral-800);
  line-height: 1.5;
}
.instructions-list li {
  margin-bottom: 0.3em;
}

/* Step Headers */
.step-header {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.6rem;
  padding: 0.3rem 0.6rem;
  background: transparent; /* Changed from gradient to transparent */
  border-radius: var(--radius-md);
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: 1.4em;
  text-align: center;
}

/* Button Styles */
.button-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 0.5rem 0;
  justify-content: flex-start;
}

.primary-button,
.secondary-button,
.sim-button {
  border: none;
  border-radius: 2.2em;
  font-size: 1.08em;
  font-weight: 700;
  padding: 0.4em 1.2em;
  margin: 0.2em 0.2em 0.2em 0;
  box-shadow: 0 2px 8px rgba(67, 97, 238, 0.08);
  transition: background 0.2s, color 0.2s, box-shadow 0.2s, transform 0.1s;
  outline: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
}
.primary-button,
.sim-button {
  background: linear-gradient(
    90deg,
    var(--color-primary) 60%,
    var(--color-secondary) 100%
  );
  color: #fff;
}
.primary-button:hover,
.primary-button:focus,
.sim-button:hover,
.sim-button:focus {
  background: linear-gradient(
    90deg,
    var(--color-primary-dark) 60%,
    var(--color-accent) 100%
  );
  color: #fff;
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 4px 16px rgba(67, 97, 238, 0.13);
}
.secondary-button {
  background: linear-gradient(
    90deg,
    var(--color-secondary) 60%,
    var(--color-accent-light) 100%
  );
  color: #fff;
}
.secondary-button:hover,
.secondary-button:focus {
  background: linear-gradient(
    90deg,
    var(--color-secondary-dark) 60%,
    var(--color-accent) 100%
  );
  color: #fff;
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 4px 16px rgba(67, 97, 238, 0.13);
}

.sim-button:disabled,
.sim-button[disabled],
.primary-button:disabled,
.primary-button[disabled] {
  background: linear-gradient(90deg, #e0e7ef 60%, #d0f0f7 100%);
  color: #b0b0b0;
  cursor: not-allowed;
  opacity: 0.7;
  box-shadow: none;
  transform: none;
}

/* Center the Check Accuracy button */
#step-accuracy-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  margin: 1rem 0;
}

/* Form Elements */
select,
input[type="text"] {
  display: block;
  margin: 0.3em auto 0.3em auto;
  width: 90%;
  min-width: 120px;
  max-width: 320px;
  box-sizing: border-box;
  background: var(--color-neutral-100);
  border: 1px solid var(--color-neutral-300);
  border-radius: var(--radius-md);
  font-size: 1rem;
  color: var(--color-neutral-800);
  padding: 0.3em 0.6em;
  transition: border-color 0.2s;
}
select:focus,
input[type="text"]:focus {
  border-color: var(--color-primary);
  outline: none;
}

input[readonly] {
  background: var(--color-neutral-200);
  border: 1px solid var(--color-neutral-300);
  color: var(--color-neutral-700);
  padding: 0.5em 0.8em;
  border-radius: var(--radius-md);
}

/* Results Panel */
#result-panel {
  background: #fff;
  border: 2px solid var(--color-primary-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  min-height: 0;
  min-width: 0;
  padding: 0.7em 0.7em 0.7em 0.7em;
  margin-bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  flex-grow: 1;
}
.result-heading {
  color: var(--color-primary-dark);
  font-size: 1.8em;
  font-weight: 700;
  margin-top: 0.1em;
  margin-bottom: 0.1em;
  text-align: center;
}
#result-content {
  width: 100%;
  min-height: 120px;
  text-align: left;
  font-size: 1.5em;
}

/* Accuracy Display */
#accuracy_ans {
  color: var(--color-success);
  font-size: 1.2em;
  font-weight: bold;
  margin-top: 1em;
  text-align: center;
}

/* Demo Panel */
#interactive-demo-panel {
  background: #fff;
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 1.5em 2em;
  margin-top: 2.5em;
  text-align: center;
}
#interactive-demo-panel h3 {
  font-size: 1.5em;
  color: var(--color-accent-dark);
  margin-top: 0;
  margin-bottom: 0.5em;
}
#interactive-demo-panel p {
  font-size: 1.05em;
  margin-bottom: 1em;
}
#demo-sentence-select,
#result-demo-select {
  width: 80%;
  padding: 0.4em;
  font-size: 1.05em;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-neutral-300);
}

/* Specific styling for result-demo-select to fit the demo sentence */
#result-demo-select {
  min-width: 420px;
  max-width: 500px;
  width: auto;
}
#demo-sentence-output,
#result-demo-output {
  margin-top: 1.5em;
  padding: 1em;
  background: var(--color-neutral-100);
  border-radius: var(--radius-md);
  min-height: 50px;
  text-align: left;
}

/* POS Tag Examples */
#example-pos-output {
  background: var(--color-neutral-100);
  border: 1.5px solid var(--color-primary-light);
  border-radius: var(--radius-lg);
  margin-top: 1.5em;
  padding: 1.2em 1.5em;
  font-size: 1.08em;
  box-shadow: 0 2px 8px rgba(67, 97, 238, 0.06);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.example-pos-sentence {
  font-size: 1.15em;
  margin-top: 0.7em;
  color: var(--color-neutral-800);
  word-break: break-word;
}

/* POS Tag Legend */
.pos-tag-legend {
  margin-top: 1.5em;
  background: var(--color-neutral-50);
  border-radius: var(--radius-md);
  padding: 1em 1.2em;
  border: 1px solid var(--color-neutral-200);
}
.pos-tag-legend h3 {
  font-size: 1.1em;
  margin-top: 0;
  color: var(--color-primary);
}
.tag-sample {
  display: inline-block;
  background: var(--color-secondary-light);
  color: var(--color-primary-dark);
  border-radius: 0.4em;
  padding: 0.1em 0.5em;
  font-size: 0.98em;
  font-weight: 600;
  margin: 0 0.2em;
  border: 1px solid var(--color-primary-light);
}

/* Professional styling for tag-sample in demo output */
#result-demo-output .tag-sample,
#demo-sentence-output .tag-sample {
  background: var(--color-neutral-100);
  color: var(--color-neutral-600);
  border: 1px solid var(--color-neutral-300);
  font-size: 0.85em;
  font-weight: 500;
  padding: 0.1em 0.4em;
  margin: 0 0.1em;
  border-radius: 0.25em;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, sans-serif;
  vertical-align: baseline;
}

/* Responsive Design */
@media (max-width: 1200px) {
  .three-pane-layout {
    grid-template-columns: 40% 60%;
    gap: 1rem 0;
  }
}

@media (max-width: 1000px) {
  .three-pane-layout {
    grid-template-columns: 45% 55%;
    gap: 1rem 0;
  }
}

@media (max-width: 900px) {
  .container {
    width: 98vw;
    max-width: 98vw;
    padding-left: 0.2rem;
    padding-right: 0.2rem;
  }
  .main-content {
    width: 100%;
    max-width: 100%;
  }
  .three-pane-layout {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }
  .instructions-panel {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }
  .pane,
  .pane-left,
  .pane-middle,
  .pane-right {
    max-width: 100%;
    width: 100%;
    min-width: 280px;
    grid-column: unset;
    grid-row: unset;
    box-sizing: border-box;
  }

  /* Explicitly set the order for small screens */
  .pane-left {
    order: 1;
  }
  .pane-middle {
    order: 2;
  }
  .pane-right {
    order: 3;
  }
  .button-container {
    flex-direction: column;
    align-items: stretch;
    gap: 0.3rem;
  }
  .primary-button,
  .secondary-button,
  .sim-button {
    font-size: 0.97em;
    padding: 0.5rem 1rem;
    margin: 0.1em 0;
  }
}

@media (max-width: 600px) {
  .container {
    width: 98vw;
    padding-left: 0.2rem;
    padding-right: 0.2rem;
  }
  .main-content {
    width: 100%;
    max-width: 100%;
  }
  .instructions-panel,
  .three-pane-layout {
    width: 100%;
    max-width: 100%;
  }
  .pane,
  .pane-left,
  .pane-middle,
  .pane-right {
    padding: 0.3rem 0.05rem;
    max-width: 100%;
    width: 100%;
    min-width: 250px;
    box-sizing: border-box;
  }
  .instructions-list {
    font-size: 0.93em;
  }
  h1,
  .experiment-title {
    font-size: 2rem;
  }
  h2 {
    font-size: 1.5rem;
  }

  /* Contain result-demo-select within result-panel on small screens */
  #result-demo-select {
    min-width: 200px;
    max-width: 90%;
    width: 90%;
  }
}

@media (max-width: 480px) {
  .container {
    width: 95vw;
    padding-left: 0.3rem;
    padding-right: 0.3rem;
  }
  .step-header {
    flex-direction: column;
    gap: 0.3rem;
    text-align: center;
    font-size: 1.2em;
  }
  .info-icon {
    margin-left: 0;
    margin-top: 0.2rem;
  }
  select,
  input[type="text"] {
    font-size: 0.9rem;
    padding: 0.4em 0.6em;
  }

  /* Further adjust result-demo-select for very small screens */
  #result-demo-select {
    min-width: 180px;
    max-width: 95%;
    width: 95%;
    font-size: 0.85em;
  }
}

/* Ensure proper order for small screens */
.main-content {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}
.instructions-panel {
  order: 0; /* Instructions panel first */
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}
.three-pane-layout {
  order: 1; /* Three-pane layout second */
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

/* Animation and transitions */
.pane {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.pane:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.simulation-step {
  transition: box-shadow 0.2s ease;
}
.simulation-step:hover {
  box-shadow: var(--shadow-lg);
}

/* Focus accessibility improvements */
select:focus,
input:focus,
button:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* High contrast mode improvements */
@media (prefers-contrast: high) {
  :root {
    --color-primary: #000080;
    --color-primary-dark: #000066;
    --color-secondary: #006666;
    --color-accent: #800040;
    --color-neutral-800: #000000;
    --color-neutral-200: #cccccc;
  }
}

/* Print styles */
@media print {
  .instructions-panel {
    page-break-inside: avoid;
  }
  .three-pane-layout {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

/* Loading and error states */
.loading {
  opacity: 0.6;
  pointer-events: none;
}
.error-message {
  background: var(--color-error);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  margin: 0.5rem 0;
}

/* Remove old instruction-step/step-number styles */
.instruction-step,
.step-number {
  display: none !important;
}

/* Center the Try Another Configuration button */
#interactive-demo-panel .button-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  margin: 1.5rem 0 1rem 0;
}

#interactive-demo-panel .secondary-button {
  margin: 0;
}

/* Center button in reset-container */
#reset-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  margin: 1rem 0;
}

#reset-container .secondary-button {
  margin: 0;
}