/* style.css - カード風＋モダンレイアウト */

:root {
  /* Light mode colors */
  --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --text-color: #2d3748;
  --card-bg: #ffffff;
  --card-border: rgba(255, 255, 255, 0.2);
  --input-bg: #ffffff;
  --input-border: #e2e8f0;
  --input-focus: #667eea;
  --readonly-bg: #f7fafc;
  --readonly-text: #4a5568;
  --button-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --button-disabled-bg: #e2e8f0;
  --button-disabled-text: #a0aec0;
  --toast-bg: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
  --tooltip-bg: rgba(0, 0, 0, 0.9);
  --secondary-text: #718096;
  --error-text: #d32f2f;
  --char-count-text: #666;
  --drop-area-bg: #f9f9f9;
  --drop-area-border: #ccc;
  --drop-area-hover-bg: #f0f8ff;
  --drop-area-hover-border: #007acc;
}

[data-theme="dark"] {
  /* Dark mode colors */
  --bg-gradient: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  --text-color: #e2e8f0;
  --card-bg: rgba(45, 55, 72, 0.95);
  --card-border: rgba(255, 255, 255, 0.1);
  --input-bg: #2d3748;
  --input-border: #4a5568;
  --input-focus: #667eea;
  --readonly-bg: #1a202c;
  --readonly-text: #a0aec0;
  --button-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --button-disabled-bg: #4a5568;
  --button-disabled-text: #718096;
  --toast-bg: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
  --tooltip-bg: rgba(0, 0, 0, 0.9);
  --secondary-text: #a0aec0;
  --error-text: #fc8181;
  --char-count-text: #a0aec0;
  --drop-area-bg: #2d3748;
  --drop-area-border: #4a5568;
  --drop-area-hover-bg: #374151;
  --drop-area-hover-border: #667eea;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  background: var(--bg-gradient);
  color: var(--text-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  transition: background 0.3s ease, color 0.3s ease;
}

main {
  max-width: 860px;
  width: 100%;
  padding: 30px;
  box-sizing: border-box;
  background: var(--card-bg);
  border-radius: 16px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  margin: 20px;
  position: relative;
  transition: background 0.3s ease;
}

header, footer {
  width: calc(100% - 60px);
  max-width: 800px;
  text-align: center;
  padding: 24px 30px;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  margin: 20px;
  transition: background 0.3s ease;
}

footer {
  border: 1px solid var(--card-border);
}

#results-container {
  max-width: 860px;
  width: 100%;
  padding: 30px;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--card-border);
  margin: 20px;
  box-sizing: border-box;
  transition: background 0.3s ease;
}

h1 {
  font-size: 2.2em;
  font-weight: 700;
  margin-bottom: 0.3em;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

section {
  margin-top: 24px;
}

.card {
  background: var(--card-bg);
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  margin-bottom: 20px;
  transition: box-shadow 0.3s ease-in-out, background 0.3s ease;
}

.card:hover {
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 1.2em;
  border-bottom: 1px solid #eee;
  padding-bottom: 5px;
}

textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 12px;
  margin-top: 6px;
  margin-bottom: 12px;
  border: 2px solid var(--input-border);
  border-radius: 8px;
  font-size: 1em;
  font-family: inherit;
  background: var(--input-bg);
  color: var(--text-color);
  transition: border-color 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
  resize: vertical;
}

textarea:focus {
  outline: none;
  border-color: var(--input-focus);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

textarea[readonly] {
  background-color: var(--readonly-bg);
  color: var(--readonly-text);
  cursor: default;
  border-color: var(--input-border);
}

input[type="number"], input[type="range"] {
  box-sizing: border-box;
  padding: 8px 12px;
  margin-top: 4px;
  margin-bottom: 10px;
  border: 2px solid var(--input-border);
  border-radius: 6px;
  font-size: 1em;
  background: var(--input-bg);
  color: var(--text-color);
  transition: border-color 0.3s ease, background 0.3s ease;
}

input[type="number"]:focus {
  outline: none;
  border-color: var(--input-focus);
}

button {
  margin-top: 6px;
  margin-right: 6px;
  padding: 10px 18px;
  font-size: 0.95em;
  font-weight: 500;
  border: none;
  border-radius: 8px;
  background: var(--button-bg);
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

button:active {
  transform: translateY(0);
}

button:disabled {
  background: var(--button-disabled-bg);
  color: var(--button-disabled-text);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

fieldset {
  border: 1px solid var(--input-border);
  padding: 10px;
  border-radius: 4px;
  background: var(--input-bg);
  transition: background 0.3s ease, border-color 0.3s ease;
}

legend {
  padding: 0 6px;
  font-weight: bold;
}

.split-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.split-controls input[type="number"] {
  width: 80px;
  margin-bottom: 0;
  cursor: help;
}

.split-controls input[type="range"] {
  flex: 1;
  margin-bottom: 0;
}

.slider-labels {
  display: grid;
  grid-template-columns: repeat(20, 1fr);
  font-size: 0.85em;
  margin-top: 5px;
  margin-left: 90px; /* Offset to align with slider */
  width: calc(100% - 90px); /* Match slider width */
  text-align: center;
}

/* Individual label positioning adjustments */
.slider-labels .label-1 {
  transform: translateX(20%);
}

.slider-labels .label-3 {
  transform: translateX(10%);
}

.slider-labels .label-5 {
  transform: translateX(5%);
}

.slider-labels .label-20 {
  transform: translateX(-25%);
}

.slider-labels .mark {
  color: red;
  font-weight: bold;
}

.error-message {
  color: var(--error-text);
  font-size: 0.875em;
  margin-top: 5px;
  margin-left: 90px;
  min-height: 20px;
}

.char-count {
  font-size: 0.9em;
  color: var(--char-count-text);
  margin-left: 10px;
}

.file-drop-area {
  position: relative;
  margin: 10px 0;
  border: 2px dashed var(--drop-area-border);
  border-radius: 8px;
  background-color: var(--drop-area-bg);
  transition: all 0.3s ease;
}

.file-drop-area input[type="file"] {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.file-drop-area label {
  display: block;
  cursor: pointer;
  margin: 0;
}

.drop-area-content {
  padding: 15px 30px;
  text-align: center;
  color: var(--char-count-text);
}

.drop-icon {
  display: block;
  font-size: 1.5em;
  margin-bottom: 6px;
}

.drop-text {
  display: block;
  font-size: 0.9em;
  line-height: 1.4;
}

.file-drop-area:hover {
  border-color: var(--drop-area-hover-border);
  background-color: var(--drop-area-hover-bg);
}

.file-drop-area.drag-over {
  border-color: var(--drop-area-hover-border);
  background-color: var(--drop-area-hover-bg);
  transform: scale(1.02);
}

.button-group-right {
  text-align: right;
  margin-top: 10px;
}


.footer {
  font-size: 0.9em;
  color: var(--char-count-text);
  padding: 10px;
}

.footer a {
  color: var(--input-focus);
  text-decoration: none;
}

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

.output-column {
  margin-bottom: 20px;
}

.column-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}

.column-header p {
  margin: 0;
  font-weight: bold;
}

.column-buttons {
  display: flex;
  gap: 8px;
}

.copy-btn-inline, .analyze-btn-inline {
  margin: 0;
  padding: 4px 8px;
  font-size: 0.85em;
}

.export-controls {
  display: flex;
  align-items: center;
  gap: 15px;
}

.export-option {
  font-size: 0.9em;
  color: var(--char-count-text);
  cursor: pointer;
}

/* Toast notification */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--toast-bg);
  color: white;
  padding: 12px 20px;
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  font-size: 0.9em;
  font-weight: 500;
  z-index: 1000;
  opacity: 0;
  transform: translateX(100%);
  transition: all 0.3s ease;
}

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

.toast.hide {
  opacity: 0;
  transform: translateX(100%);
}

/* Tooltip styles for analyze button */
.analyze-btn-inline:hover::after {
  content: 'このテキストを頻度分析ツールで開きます（新しいタブで外部サイトに移動）';
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--tooltip-bg);
  color: white;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.8em;
  z-index: 1001;
  width: 280px;
  text-align: center;
  line-height: 1.3;
  margin-bottom: 5px;
}

.analyze-btn-inline:hover::before {
  content: '';
  position: absolute;
  bottom: 95%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--tooltip-bg);
  z-index: 1001;
}

.analyze-btn-inline {
  position: relative;
}

/* Header layout */
.header-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  width: 100%;
}

.header-text {
  flex: 1;
}

/* Header buttons */
.header-buttons {
  display: flex;
  gap: 8px;
  align-items: center;
}

.header-btn {
  background: var(--card-bg);
  border: 2px solid var(--input-border);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  margin: 0;
  padding: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.header-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  border-color: var(--input-focus);
}

.toggle-icon, .btn-icon {
  font-size: 1.2em;
  transition: transform 0.3s ease;
}

.header-btn:hover .toggle-icon,
.header-btn:hover .btn-icon {
  transform: rotate(15deg);
}

/* Modal styles */
.modal {
  display: none;
  position: fixed;
  z-index: 2000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.modal-content {
  background-color: var(--card-bg);
  margin: 2% auto;
  border-radius: 16px;
  width: 90%;
  max-width: 800px;
  max-height: 90vh;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--card-border);
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s ease;
}

.modal-header {
  padding: 24px 30px 16px;
  border-bottom: 1px solid var(--input-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
}

.modal-header h2 {
  margin: 0;
  color: var(--text-color);
  font-size: 1.5em;
}

.modal-close {
  background: none;
  border: none;
  font-size: 2em;
  color: var(--char-count-text);
  cursor: pointer;
  padding: 0;
  margin: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.3s ease;
}

.modal-close:hover {
  background-color: var(--input-border);
  color: var(--text-color);
  transform: none;
  box-shadow: none;
}

.modal-body {
  padding: 24px 30px 30px;
  overflow-y: auto;
  flex: 1;
  color: var(--text-color);
}

.modal-body section {
  margin-bottom: 28px;
}

.modal-body section:last-child {
  margin-bottom: 0;
}

.modal-body h3 {
  color: var(--text-color);
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 1.2em;
  border-bottom: 1px solid var(--input-border);
  padding-bottom: 8px;
}

.modal-body h4 {
  color: var(--text-color);
  margin-top: 16px;
  margin-bottom: 8px;
  font-size: 1.1em;
}

.modal-body p {
  color: var(--text-color);
  line-height: 1.6;
  margin-bottom: 12px;
}

.modal-body ul,
.modal-body ol {
  color: var(--text-color);
  margin-bottom: 16px;
  padding-left: 24px;
}

.modal-body li {
  margin-bottom: 8px;
  line-height: 1.5;
}

.modal-body a {
  color: var(--input-focus);
  text-decoration: none;
}

.modal-body a:hover {
  text-decoration: underline;
}

.modal-body strong {
  color: var(--text-color);
  font-weight: 600;
}

/* Modal responsive */
@media (max-width: 768px) {
  .modal-content {
    width: 95%;
    margin: 5% auto;
    max-height: 85vh;
  }
  
  .modal-header,
  .modal-body {
    padding-left: 20px;
    padding-right: 20px;
  }
}