/* Import DM Sans font from assets */
@font-face {
  font-family: "DM Sans";
  src: url("./assets/fonts/DM_Sans/static/DMSans-Regular.ttf")
    format("truetype");
  font-weight: 400;
}

@font-face {
  font-family: "DM Sans";
  src: url("./assets/fonts/DM_Sans/static/DMSans-Bold.ttf") format("truetype");
  font-weight: 700;
}

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

:root {
  --bg: #fff;
  --text: #2a2b37;
  --textarea-bg: #f2f2f7;
  --textarea-border: #e4e4ef;
  --textarea-text: #2a2b37;
}

body.dark-mode {
  --bg: #12131a;
  --text: #f2f2f7;
  --textarea-bg: #21222c;
  --textarea-border: #2a2b37;
  --textarea-text: #e4e4ef;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: "DM Sans", system-ui, -apple-system, sans-serif;
  transition: background 0.3s ease, color 0.3s ease;
  padding: 2em 14.0625em 17.3125em 14.0625em;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 2em;
}

.theme-btn {
  border: none;
  background: none;
  cursor: pointer;
  padding: 0.5em;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* All theme icon syling */
.theme-btn .icon {
  width: 30px;
  height: 30px;
  display: none;
  transition: opacity 0.3s ease;
}

.logos .logo {
  display: none;
  width: 200px;
}

/* Light mode: show moon */
body:not(.dark-mode) .theme-btn .moon {
  display: block;
}

/* Dark mode: show light theme logo */
body:not(.dark-mode) .logo-light-mode {
  display: block;
}

/* Dark mode: show sun */
body.dark-mode .theme-btn .sun {
  display: block;
}
/* Dark mode: show dark theme logo */
body.dark-mode .logo-dark-mode {
  display: block;
}

.theme-btn:hover {
  transform: scale(1.1);
  transition: transform 0.2s ease;
}

.text-section {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.heading {
  font-family: "DM Sans";
  font-size: 4rem;
  width: 50%;
  text-align: center;
  margin-bottom: 2.5rem; /* Space below heading: 40px */
}

/* ========================================
   TEXTAREA SECTION
   ======================================== */

/* Wrapper for textarea and controls */
.input-area {
  width: 80%; /* Matches card width for alignment */
  display: flex; /* Makes children flexible */
  flex-direction: column; /* Stacks textarea above controls */
  gap: 1rem; /* Space between textarea and controls: 16px */
}

/* Main textarea styling */
.textarea {
  background-color: var(
    --textarea-bg
  ); /* Uses CSS variable for theme support */
  color: var(--textarea-text); /* Text color from CSS variable */
  border-radius: 12px; /* Rounded corners */
  border: 2px solid var(--textarea-border); /* Border using CSS variable */
  padding: 1.5rem; /* Internal spacing: 24px all sides */
  width: 100%; /* Full width of parent (.input-area) */
  height: 180px; /* Fixed height (answer 1A) */
  font-size: 1rem; /* 16px font size */
  font-family: inherit; /* Uses body font */
  resize: none; /* Prevents user from resizing */
  transition: border-color 0.3s ease; /* Smooth transition for border color changes */
  outline: none; /* Removes default browser outline */
}

/* Placeholder text styling */
.textarea::placeholder {
  color: var(--textarea-text); /* Uses theme color */
  opacity: 0.5; /* Makes placeholder lighter/subtle */
}

/* Focus state - when user clicks in textarea (answer 2A) */
.textarea:focus {
  border-color: #a78bfa; /* Purple border on focus */
  border-width: 2px; /* Keeps same width, just changes color */
}

/* Error state - when character limit exceeded (answer 3A) */
.textarea.error {
  border-color: #ef4444; /* Red border for error */
  border-width: 2px; /* Consistent border width */
}

/* Controls container - holds checkboxes and reading time (answer 4B) */
.controls {
  display: flex; /* Makes children sit in a row */
  justify-content: space-between; /* Pushes checkboxes left, reading time right */
  align-items: center; /* Vertically centers items */
  width: 100%; /* Full width of parent */
  padding: 0.5rem 0; /* Small top/bottom padding: 8px */
}

/* Checkboxes wrapper on the left */
.options {
  display: flex; /* Makes checkboxes sit in a row */
  gap: 1.5rem; /* Space between checkbox items: 24px */
  align-items: center; /* Vertically centers checkboxes */
}

/* Individual checkbox item (checkbox + label) */
.check-item {
  display: flex; /* Makes checkbox and label sit side-by-side */
  align-items: center; /* Vertically centers checkbox with label */
  gap: 0.5rem; /* Space between checkbox and label: 8px */
}

/* Checkbox input styling */
.check-item input[type="checkbox"] {
  width: 18px; /* Checkbox width */
  height: 18px; /* Checkbox height */
  cursor: pointer; /* Shows hand cursor on hover */
  accent-color: #a78bfa; /* Purple color when checked */
}

/* Checkbox label text */
.check-item label {
  font-size: 0.95rem; /* Slightly smaller: 15px */
  color: var(--text); /* Uses theme text color */
  cursor: pointer; /* Shows hand cursor on hover */
  -webkit-user-select: none; /* Safari support */
  user-select: none; /* Prevents text selection when clicking */
}

/* Screen reader only - visually hidden but accessible to screen readers */
.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;
}

/* Character limit input field */
.limit-input {
  width: 70px; /* Fixed width for number input */
  padding: 0.25rem 0.5rem; /* Small padding: 4px top/bottom, 8px left/right */
  border: 1px solid var(--textarea-border); /* Border matches theme */
  border-radius: 6px; /* Small rounded corners */
  background-color: var(--textarea-bg); /* Background matches theme */
  color: var(--text); /* Text color from theme */
  font-size: 0.9rem; /* Slightly smaller: 14px */
  text-align: center; /* Centers the number */
  outline: none; /* Removes default outline */
}

/* Focus state for limit input */
.limit-input:focus {
  border-color: #a78bfa; /* Purple border on focus */
}

/* Hidden class - hides elements with display:none */
.hidden {
  display: none; /* Completely removes from layout */
}

/* Reading time text on the right */
.reading-time {
  font-size: 0.95rem; /* Slightly smaller: 15px */
  color: var(--text); /* Uses theme text color */
  white-space: nowrap; /* Prevents text from wrapping to new line */
}

/* Highlighted span inside reading time (the actual time number) */
.reading-time span {
  font-weight: 600; /* Makes the number slightly bolder */
}

/* Warning message below textarea when limit exceeded (answer 3A) */
.limit-warning {
  display: flex; /* Makes icon and text sit side-by-side */
  align-items: center; /* Vertically centers icon with text */
  gap: 0.5rem; /* Space between icon and text: 8px */
  color: #ef4444; /* Red color for warning */
  font-size: 0.9rem; /* Slightly smaller: 14px */
  margin-top: -0.5rem; /* Pulls warning closer to textarea */
  padding-left: 0.25rem; /* Small left padding for alignment */
}

/* Warning icon (if using an icon) */
.limit-warning::before {
  content: "⚠"; /* Warning emoji/symbol */
  font-size: 1rem; /* Icon size */
}

/* ========================================
   STATISTICS CARDS SECTION
   ======================================== */

/* Container for all three stat cards */
.stats-container {
  display: flex;
  gap: 1.5rem;
  margin-top: 3rem;
  width: 80%;
  margin-left: auto;
  margin-right: auto;
}

/* Individual card styling */
.card {
  flex: 1;
  min-width: 0;
  padding: 2rem 1.5rem;
  border-radius: 16px;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 150px;
}

/* Purple card - for Total Characters */
.purple-card {
  background-color: #c4b5fd;
  background-image: url("./assets/images/pattern-character-count.svg");
  background-size: 120px 120px;
  background-position: right center;
  background-repeat: no-repeat;
}

/* Orange card - for Word Count */
.orange-card {
  background-color: #fb923c;
  background-image: url("./assets/images/pattern-word-count.svg");
  background-size: 120px 120px;
  background-position: right center;
  background-repeat: no-repeat;
}

/* Red/coral card - for Sentence Count */
.red-card {
  background-color: #f87171;
  background-image: url("./assets/images/pattern-sentence-count.svg");
  background-size: 120px 120px;
  background-position: right center;
  background-repeat: no-repeat;
}

/* Card content wrapper */
.card-content {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  position: relative;
  z-index: 1;
}

/* The number/count display */
.card .count {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1;
  color: #1f2937;
}

/* The label text */
.card .label {
  font-size: 0.95rem;
  font-weight: 500;
  color: #1f2937;
  line-height: 1.4;
}

/* ========================================
   LETTER DENSITY SECTION
   ======================================== */

/* Main letter density section */
.letter-density {
  width: 80%; /* Matches textarea and cards width */
  margin: 3rem auto 0 auto; /* 48px top margin, centered horizontally */
}

/* Section heading */
.letter-density h2 {
  font-size: 1.5rem; /* 24px */
  font-weight: 600; /* Semi-bold */
  color: var(--text); /* Uses theme color */
  margin-bottom: 1.5rem; /* 24px space below heading */
}

/* Container for all letter items */
.density-list {
  display: flex; /* Makes children flexible */
  flex-direction: column; /* Stacks letter items vertically */
  gap: 1rem; /* 16px space between each letter item */
}

/* Empty message when no text is entered */
.empty-message {
  color: var(--text); /* Uses theme color */
  opacity: 0.6; /* Makes it lighter/subtle */
  font-size: 0.95rem; /* 15px */
  text-align: center; /* Centers the message */
  padding: 2rem 0; /* 32px top/bottom padding */
}

/* Individual letter item (letter + bar + percentage) */
.letter-item {
  display: flex; /* Makes children sit in a row */
  align-items: center; /* Vertically centers all items */
  gap: 1rem; /* 16px space between letter, bar, and percentage */
}

/* The letter label on the left (E, I, T, etc.) */
.letter-item .letter {
  font-size: 1.125rem; /* 18px - slightly larger */
  font-weight: 600; /* Semi-bold */
  color: var(--text); /* Uses theme color */
  width: 1.5rem; /* Fixed width: 24px for alignment */
  text-align: center; /* Centers the letter in its space */
  flex-shrink: 0; /* Prevents letter from shrinking */
}

/* Progress bar container (background track) */
.letter-item .progress-bar {
  flex: 1; /* Takes up remaining space between letter and percentage */
  height: 12px; /* Bar height */
  background-color: var(--textarea-bg); /* Light background (theme-aware) */
  border-radius: 6px; /* Rounded ends */
  overflow: hidden; /* Hides overflow of fill bar */
  position: relative; /* Allows positioning of fill inside */
}

/* Progress bar fill (the actual purple bar) */
.letter-item .fill {
  height: 100%; /* Full height of parent */
  background-color: #a78bfa; /* Purple color matching theme */
  border-radius: 6px; /* Rounded ends */
  transition: width 0.3s ease; /* Smooth animation when width changes */
  /* Width will be set dynamically by JavaScript (e.g., width: 50%) */
}

/* Percentage and count text on the right */
.letter-item .percentage {
  font-size: 0.95rem; /* 15px */
  color: var(--text); /* Uses theme color */
  white-space: nowrap; /* Prevents wrapping to new line */
  min-width: 90px; /* Fixed minimum width for alignment */
  text-align: right; /* Right-aligns the text */
  flex-shrink: 0; /* Prevents percentage from shrinking */
}

/* "See more" / "See less" button */
.see-more {
  display: flex; /* Makes text and icon sit side-by-side */
  align-items: center; /* Vertically centers text with icon */
  gap: 0.5rem; /* 8px space between text and arrow icon */
  background: none; /* No background (text button style) */
  border: none; /* No border */
  color: var(--text); /* Uses theme color */
  font-size: 0.95rem; /* 15px */
  font-weight: 500; /* Medium weight */
  cursor: pointer; /* Shows hand cursor on hover */
  padding: 0.75rem 0; /* 12px top/bottom padding */
  margin-top: 1rem; /* 16px space above button */
  transition: opacity 0.2s ease; /* Smooth hover effect */
}

/* Hover state for see more button */
.see-more:hover {
  opacity: 0.7; /* Slightly transparent on hover */
}

/* Arrow icon inside button */
.see-more img {
  width: 16px; /* Icon width */
  height: 16px; /* Icon height */
  transition: transform 0.3s ease; /* Smooth rotation animation */
}

/* Rotate arrow when expanded (will toggle class with JavaScript) */
.see-more.expanded img {
  transform: rotate(180deg); /* Flips arrow upside down */
}

/* Media Queries */

@media (max-width: 375px) {
  body {
    padding: 1.5em;
  }

  header {
    padding-bottom: 1.2em;
  }

  .logos .logo {
    width: 95px;
  }

  .theme-btn .icon {
    width: 26px;
    height: 26px;
  }

  /* Heading adjustments */
  .heading {
    font-size: 2rem; /* Smaller heading: 32px */
    width: 90%; /* Wider on mobile */
    margin-bottom: 1.5rem; /* Less space below */
  }

  /* Textarea section adjustments */
  .input-area {
    width: 100%; /* Full width on mobile */
  }

  .textarea {
    height: 150px; /* Slightly shorter on mobile */
    font-size: 0.95rem; /* Slightly smaller text */
  }

  /* Stack controls vertically on very small screens */
  .controls {
    flex-direction: column; /* Changes from row to column */
    align-items: flex-start; /* Aligns items to left */
    gap: 0.75rem; /* Space between stacked items */
  }

  .options {
    flex-direction: column; /* Stack checkboxes vertically */
    align-items: flex-start; /* Align to left */
    gap: 0.5rem; /* Smaller gap */
  }

  .check-item {
    width: 100%;
  }

  .check-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
  }

  .check-item label {
    font-size: 0.85rem;
  }

  /* Letter Density adjustments */
  .letter-density {
    width: 100%; /* Full width on mobile */
    margin-top: 2rem; /* Less top margin */
  }

  .letter-density h2 {
    font-size: 1.25rem; /* Smaller heading: 20px */
  }

  .letter-item {
    gap: 0.75rem; /* Tighter spacing */
  }

  .letter-item .letter {
    font-size: 1rem; /* Smaller letter: 16px */
    width: 1.25rem; /* Narrower width */
  }

  .letter-item .percentage {
    font-size: 0.875rem; /* Smaller text: 14px */
    min-width: 80px; /* Narrower on mobile */
  }

  /* Stack cards vertically on small screens */
  .stats-container {
    flex-direction: column;
    gap: 1rem;
    width: 100%;
  }

  .card .count {
    font-size: 3rem;
  }
}

@media (min-width: 376px) and (max-width: 480px) {
  body {
    padding: 2em;
  }

  .logos .logo {
    width: 110px;
  }

  .theme-btn .icon {
    width: 28px;
    height: 28px;
  }

  /* Heading adjustments */
  .heading {
    font-size: 2.5rem; /* Medium heading: 40px */
    width: 85%; /* Slightly wider */
    margin-bottom: 2rem; /* 32px space below */
  }

  /* Textarea adjustments */
  .input-area {
    width: 100%; /* Full width on mobile */
  }

  /* Controls responsive */
  .controls {
    flex-wrap: wrap;
    gap: 1rem;
  }

  .options {
    flex-wrap: wrap;
    width: 100%;
    gap: 1rem;
  }

  .check-item label {
    font-size: 0.9rem;
  }

  /* Letter Density adjustments */
  .letter-density {
    width: 100%; /* Full width on mobile landscape */
    margin-top: 2.5rem;
  }

  /* Stack cards vertically on small screens */
  .stats-container {
    flex-direction: column;
    gap: 1rem;
    width: 100%;
  }
}

/* Tablets and large phones (481px to 768px) */
@media (min-width: 481px) and (max-width: 768px) {
  body {
    padding: 2.5em 4em; /* Comfortable padding for tablets */
  }

  .logos .logo {
    width: 130px; /* Medium logo size */
  }

  /* Tablet heading */
  .heading {
    font-size: 3rem; /* 48px for small tablets */
    width: 70%; /* Moderate width */
    margin-bottom: 2rem; /* 32px space below */
  }

  /* Textarea adjustments */
  .input-area {
    width: 90%; /* Slightly narrower than mobile */
  }

  /* Letter Density adjustments */
  .letter-density {
    width: 90%; /* Match input-area width */
  }

  /* Controls responsive */
  .controls {
    justify-content: flex-start;
    gap: 1.5rem;
    flex-wrap: wrap;
  }

  .options {
    gap: 1.2rem;
    flex-wrap: wrap;
  }

  /* Keep cards stacked on smaller tablets */
  .stats-container {
    flex-direction: column;
    gap: 1rem;
    width: 90%;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  body {
    padding: 3em 6em;
  }

  .logo .logo {
    width: 150px;
  }

  /* Tablet heading - slightly smaller than desktop */
  .heading {
    font-size: 3.5rem; /* 56px for tablets */
    width: 60%; /* Slightly narrower */
    margin-bottom: 2.25rem; /* 36px space below */
  }
}

@media (min-width: 1025px) and (max-width: 1440px) {
  body {
    padding: 4em 10em;
  }

  /* Desktop heading - standard size */
  .heading {
    font-size: 3.75rem; /* 60px for smaller desktops */
    width: 55%; /* Balanced width */
    margin-bottom: 2.5rem; /* 40px space below */
  }
}

@media (min-width: 1441px) {
  body {
    padding: 2em 14em;
  }

  /* Large desktop heading - full size from base styles */
  .heading {
    font-size: 4rem; /* 64px for large screens */
    width: 50%; /* Original design width */
    margin-bottom: 2.5rem; /* 40px space below */
  }
}