/* Modern iOS Markdown Viewer */
@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=SF+Mono:wght@400;500&display=swap");

:root {
  /* Common sizes and colors */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --success-color: #34c759;
  --error-color: #ff3b30;

  --primary-color: #007aff;
  --primary-hover: #0063cc;
}

/* Light theme */
:root,
:root[data-theme="light"] {
  --bg-color: #f2f2f7;
  --card-bg: #ffffff;
  --text-primary: #1c1c1e;
  --text-secondary: #6c6c70;
  --border-color: #e5e5ea;
  --content-bg: #ffffff;
  --code-bg: #f2f2f7;
  --blockquote-bg: rgba(0, 122, 255, 0.08);
  --table-header-bg: #f9f9fa;
  --details-bg: #f9f9fa;
  --input-text: #1c1c1e;
  --input-placeholder: #8e8e93;
  --clear-button-bg: #e5e5ea;
  --clear-button-hover: #d1d1d6;
  --clear-button-text: #1c1c1e;
  --mermaid-bg: #ffffff;
  --pre-bg: #1c1c1e;
  --pre-text: #ffffff;

  /* Header colors */
  --header-bg: rgba(255, 255, 255, 0.8);
  --header-blur: 20px;
  --header-border: rgba(0, 0, 0, 0.05);
  --app-icon-bg: #007aff;
  --app-icon-color: #ffffff;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
}

/* Dark theme */
:root[data-theme="dark"] {
  --bg-color: #1c1c1e;
  --card-bg: #2c2c2e;
  --text-primary: #ffffff;
  --text-secondary: #aeaeb2;
  --border-color: #38383a;
  --content-bg: #2c2c2e;
  --code-bg: #3a3a3c;
  --blockquote-bg: rgba(10, 132, 255, 0.15);
  --table-header-bg: #3a3a3c;
  --details-bg: #3a3a3c;
  --input-text: #ffffff;
  --input-placeholder: #8e8e93;
  --clear-button-bg: #3a3a3c;
  --clear-button-hover: #48484a;
  --clear-button-text: #ffffff;
  --mermaid-bg: #2c2c2e;
  --pre-bg: #3a3a3c;
  --pre-text: #ffffff;

  /* Header colors */
  --header-bg: rgba(44, 44, 46, 0.8);
  --header-blur: 20px;
  --header-border: rgba(255, 255, 255, 0.05);
  --app-icon-bg: #0a84ff;
  --app-icon-color: #ffffff;

  /* Shadows for dark mode */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
}

/* Basic reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Body styles */
body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "SF Pro Display", system-ui, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  padding: 1rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Header */
.ios-style-header {
  position: relative;
  text-align: center;
  margin-bottom: 2rem;
  width: 100%;
  max-width: 1000px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  padding: 1.5rem;
  z-index: 10;
}

.header-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--header-bg);
  backdrop-filter: blur(var(--header-blur));
  -webkit-backdrop-filter: blur(var(--header-blur));
  border: 1px solid var(--header-border);
  border-radius: var(--radius-lg);
  z-index: -1;
  box-shadow: var(--shadow-md);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  transition: transform 0.3s ease;
}

.header-content:hover {
  transform: translateY(-2px);
}

.app-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background-color: var(--app-icon-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 1.5rem;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.app-icon svg {
  width: 32px;
  height: 32px;
  stroke: var(--app-icon-color);
  stroke-width: 2;
}

.header-text {
  text-align: left;
}

.ios-style-header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.3rem;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.ios-style-header .subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  margin: 0;
  text-align: left;
}

/* Theme Switch */
.switch {
  font-size: 17px;
  position: fixed;
  top: 2rem;
  right: 2rem;
  display: inline-block;
  width: 4em;
  height: 2.2em;
  border-radius: 30px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  z-index: 100;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #2a2a2a;
  transition: 0.4s;
  border-radius: 30px;
  overflow: hidden;
}

.slider:before {
  position: absolute;
  content: "";
  height: 1.2em;
  width: 1.2em;
  border-radius: 20px;
  left: 0.5em;
  bottom: 0.5em;
  transition: 0.4s;
  transition-timing-function: cubic-bezier(0.81, -0.04, 0.38, 1.5);
  box-shadow: inset 8px -4px 0px 0px #fff;
}

.switch input:checked + .slider {
  background-color: #00a6ff;
}

.switch input:checked + .slider:before {
  transform: translateX(1.8em);
  box-shadow: inset 15px -4px 0px 15px #ffcf48;
}

.star {
  background-color: #fff;
  border-radius: 50%;
  position: absolute;
  width: 5px;
  transition: all 0.4s;
  height: 5px;
}

.star_1 {
  left: 2.5em;
  top: 0.5em;
}

.star_2 {
  left: 2.2em;
  top: 1.2em;
}

.star_3 {
  left: 3em;
  top: 0.9em;
}

.switch input:checked ~ .slider .star {
  opacity: 0;
}

.cloud {
  width: 3.5em;
  position: absolute;
  bottom: -1.4em;
  left: -1.1em;
  opacity: 0;
  transition: all 0.4s;
}

.switch input:checked ~ .slider .cloud {
  opacity: 1;
}

/* Regular header */
header {
  text-align: center;
  margin-bottom: 1.5rem;
  width: 100%;
  max-width: 1000px;
}

h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  letter-spacing: -0.025em;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 700px;
  margin: 0 auto;
}

h2 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

/* Main container */
#container {
  width: 100%;
  max-width: 1600px;
  margin: 0 auto 1.5rem;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  gap: 1.5rem;
  flex: 1;
}

/* Main panels */
.editor-section,
.preview-section {
  background-color: var(--card-bg);
  padding: 1.5rem;
  width: 100%;
  flex: 1;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

#markdown-form {
  display: flex;
  flex-direction: column;
  flex: 1;
}

/* Text areas */
textarea,
#markdown-preview {
  width: 100%;
  min-height: 150px;
  padding: 1.5rem;
  font-size: 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: left;
  background-color: var(--content-bg);
  margin: 1rem 0 1.5rem;
  transition: all 0.2s ease;
  line-height: 1.6;
}

textarea {
  font-family: "SF Mono", "Menlo", monospace;
  resize: none;
  box-shadow: var(--shadow-sm);
  color: var(--input-text);
  overflow-y: hidden;
  overflow-x: hidden;
}

textarea::-webkit-scrollbar {
  display: none;
}

textarea {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

textarea::placeholder {
  color: var(--input-placeholder);
  opacity: 0.8;
}

textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(var(--primary-color-rgb, 10, 132, 255), 0.2);
}

#markdown-preview {
  overflow-x: auto;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  box-shadow: var(--shadow-sm);
}

/* Buttons */
.button-container {
  display: flex;
  gap: 1rem;
  margin-top: auto;
}

button {
  padding: 0.75rem 1.5rem;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif;
  font-weight: 500;
  font-size: 1rem;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

button[type="submit"] {
  background-color: var(--primary-color);
  color: white;
  flex: 1;
}

button[type="submit"]:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

button[type="submit"]:active {
  transform: translateY(0);
}

#clear-button {
  background-color: var(--clear-button-bg);
  color: var(--clear-button-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex: 1;
}

#clear-button::before {
  content: "🧹";
  font-size: 1.2em;
  display: inline-block;
  vertical-align: middle;
  margin-right: 0.3rem;
  transform: translateY(-1px);
}

#clear-button:hover {
  background-color: var(--clear-button-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

#clear-button:active {
  transform: translateY(0);
}

button.success {
  background-color: var(--success-color);
  box-shadow: 0 0 0 3px rgba(52, 199, 89, 0.2);
}

/* Empty state */
.empty-message {
  color: var(--text-secondary);
  font-style: italic;
  text-align: center;
  padding: 2rem 0;
}

/* Loading styles */
.loading {
  opacity: 0.7;
  position: relative;
}

.loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

/* Markdown styling */
#markdown-preview h1 {
  font-size: 2rem;
  margin: 1.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
}

#markdown-preview h2 {
  font-size: 1.5rem;
  margin: 1.5rem 0 1rem;
  text-align: left;
}

#markdown-preview h3 {
  font-size: 1.25rem;
  margin: 1.25rem 0 0.75rem;
  text-align: left;
}

#markdown-preview h4,
#markdown-preview h5,
#markdown-preview h6 {
  margin: 1rem 0 0.5rem;
  text-align: left;
}

#markdown-preview p {
  margin-bottom: 1rem;
  line-height: 1.7;
}

#markdown-preview ul,
#markdown-preview ol {
  margin: 1rem 0;
  padding-left: 2rem;
}

#markdown-preview li {
  margin-bottom: 0.5rem;
}

#markdown-preview a {
  color: var(--primary-color);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

#markdown-preview a:hover {
  border-bottom-color: var(--primary-color);
}

#markdown-preview blockquote {
  margin: 1rem 0;
  padding: 0.75rem 1.25rem;
  border-left: 4px solid var(--primary-color);
  background-color: var(--blockquote-bg);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
}

#markdown-preview code {
  font-family: "SF Mono", "Menlo", monospace;
  background-color: var(--code-bg);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9rem;
}

#markdown-preview pre {
  background-color: var(--pre-bg);
  color: var(--pre-text);
  padding: 1rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: 1rem 0;
}

#markdown-preview pre code {
  font-family: "SF Mono", "Menlo", monospace;
  background-color: transparent;
  padding: 0;
  color: inherit;
  font-size: 0.9rem;
  line-height: 1.5;
}

#markdown-preview img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: 1rem 0;
}

#markdown-preview table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

#markdown-preview table th,
#markdown-preview table td {
  border: 1px solid var(--border-color);
  padding: 0.75rem 1rem;
  text-align: left;
}

#markdown-preview table th {
  background-color: var(--table-header-bg);
}

#markdown-preview hr {
  height: 1px;
  background-color: var(--border-color);
  border: none;
  margin: 2rem 0;
}

/* Copy button */
#copy-button {
  background-color: var(--primary-color);
  color: white;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex: 1;
}

#copy-button::before {
  content: "📋";
  font-size: 1.2em;
  display: inline-block;
  vertical-align: middle;
  margin-right: 0.3rem;
  transform: translateY(-1px);
}

#copy-button:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

#copy-button:active {
  transform: translateY(0);
}

/* GitHub Markdown extras */
.task-list-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 0.5rem;
}

.task-list-item input[type="checkbox"] {
  margin-right: 0.5rem;
  margin-top: 0.25rem;
}

/* Footnotes */
.footnotes {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.footnote {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.footnote-ref {
  font-size: 0.75rem;
  position: relative;
  top: -0.5em;
  text-decoration: none;
  margin-left: 0.2rem;
}

.footnote-backref {
  text-decoration: none;
}

/* Definition lists */
dl {
  margin: 1rem 0;
}

dt {
  font-weight: bold;
  margin-top: 0.5rem;
}

dd {
  margin-left: 2rem;
  margin-bottom: 0.5rem;
}

/* Math stuff */
.math {
  overflow-x: auto;
  max-width: 100%;
}

/* Mermaid diagrams */
.mermaid {
  background-color: var(--mermaid-bg);
  padding: 1rem;
  border-radius: var(--radius-md);
  margin: 1rem 0;
  border: 1px solid var(--border-color);
}

/* Collapsible sections */
details {
  margin: 1rem 0;
  padding: 0.75rem;
  background-color: var(--details-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

summary {
  cursor: pointer;
  font-weight: 600;
  padding: 0.5rem 0;
}

details[open] summary {
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

/* HTML in markdown */
#markdown-preview div {
  max-width: 100%;
}

/* Footer */
footer {
  margin-top: auto;
  padding: 1.5rem 0;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.heart {
  color: #ff3b30;
  display: inline-block;
  transform: translateY(1px);
}

/* Mobile styles */
@media (max-width: 992px) {
  #container {
    flex-direction: column;
    gap: 1.5rem;
    max-width: 800px;
  }

  .editor-section,
  .preview-section {
    width: 100%;
  }

  textarea,
  #markdown-preview {
    min-height: 300px;
  }
}

@media (max-width: 768px) {
  body {
    padding: 1rem 0.75rem;
  }

  header {
    margin-bottom: 1rem;
  }

  h1 {
    font-size: 1.75rem;
  }

  .subtitle {
    font-size: 0.9rem;
  }

  h2 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
  }

  .editor-section,
  .preview-section {
    padding: 1rem;
  }

  textarea,
  #markdown-preview {
    padding: 0.75rem;
    font-size: 0.9rem;
    margin: 0.75rem 0 1rem;
    min-height: 250px;
  }

  button {
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
  }

  .button-container {
    gap: 0.5rem;
  }

  .switch {
    top: 1.75rem;
    right: 1.75rem;
    font-size: 15px;
  }
}

@media (max-width: 480px) {
  body {
    padding: 0.75rem 0.5rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  .switch {
    top: 1.5rem;
    right: 1.5rem;
    font-size: 14px;
  }

  .editor-section,
  .preview-section {
    padding: 0.75rem;
  }

  textarea,
  #markdown-preview {
    min-height: 200px;
    padding: 0.75rem;
    font-size: 0.85rem;
  }

  .button-container {
    flex-direction: column;
    gap: 0.5rem;
  }

  button {
    width: 100%;
    padding: 0.6rem 0.75rem;
    font-size: 0.85rem;
  }

  footer {
    padding: 1rem 0;
    font-size: 0.8rem;
  }
}