/* ────────────────────────────────────────────────────────────────────────────────
   Snip Text – Paraphraser UI Styles (clean + commented)
   - All base/desktop styles first
   - All responsive media queries consolidated at the very end
   - Nothing changed/removed: only reordered + commented
──────────────────────────────────────────────────────────────────────────────── */

/* ────────────────────────────────────────────────────────────────────────────────
   1) Dark/Light Theme Variables
──────────────────────────────────────────────────────────────────────────────── */
:root {
  /* Brand */
  --brand-color: #1D4ED8;
  --brand-color-rgb: 29, 78, 216;
  --brand-gradient-start: rgba(29, 78, 216, 0.8);
  --brand-gradient-end:   rgba(29, 78, 216, 1);

  /* Backgrounds */
  --bg-page:     #f0f4f8;
  --bg-container:#ffffff;
  --bg-input:    #fafafa;
  --bg-tab:      #f9f9f9;
  --bg-tab-hover:#eeeeee;
  --bg-highlight:#f1f4ff;
  --bg-svg-circle: rgba(170, 182, 254, 0.2);

  /* Text */
  --text-primary:   #222222;
  --text-secondary: #444444;
  --text-subtitle:  #666666;
  --text-light:     #ffffff;
  --text-muted:     #888888;

  /* Borders & Shadows */
  --border-default: #dddddd;
  --shadow-light:   rgba(0,0,0,0.05);
  --shadow-medium:  rgba(0,0,0,0.1);

  /* Diff highlights */
  --diff-added-bg:   #d4edda;
  --diff-added-text: #155724;
  --diff-del-bg:     #f8d7da;
  --diff-del-text:   #721c24;
  
  /* Controls */
  --control-surface: var(--bg-container);
  --control-border:  var(--border-default);
  --chip-bg:         rgba(var(--brand-color-rgb), .08);
  --chip-text:       var(--text-secondary);
  --chip-remove:     rgba(var(--brand-color-rgb), .95);

  /* Slider */
  --slider-track:    #dfe3ea;
  --slider-fill:     rgba(var(--brand-color-rgb), 1);
  --slider-thumb:    var(--brand-color);
  --slider-thumb-ring: rgba(var(--brand-color-rgb), .25);
}

[data-theme="dark"] {
  /* Brand */
  --brand-color: #3B82F6;
  --brand-color-rgb: 59, 130, 246;
  --brand-gradient-start: rgba(59, 130, 246, 0.8);
  --brand-gradient-end:   rgba(59, 130, 246, 1);

  /* Backgrounds */
  --bg-page:      #1E1E2A;
  --bg-container: #2A2A3F;
  --bg-input:     #333349;
  --bg-tab:       #2F2F45;
  --bg-tab-hover: #3A3A55;
  --bg-highlight: #252535;
  --bg-svg-circle: rgba(59, 130, 246, 0.1);

  /* Text */
  --text-primary:   #F0F0F0;
  --text-secondary: #DDDDDD;
  --text-subtitle:  #BBBBBB;
  --text-light:     #ffffff;
  --text-muted:     #AAAAAA;

  /* Borders & Shadows */
  --border-default: #444457;
  --shadow-light:   rgba(0,0,0,0.3);
  --shadow-medium:  rgba(0,0,0,0.5);

  /* Diff highlights */
  --diff-added-bg:   #274d2f;
  --diff-added-text: #a6d8a1;
  --diff-del-bg:     #4d292f;
  --diff-del-text:   #e09a9f;
  
  /* Controls */
  --control-surface: var(--bg-input);
  --control-border:  #40445a;
  --chip-bg:         rgba(var(--brand-color-rgb), .18);
  --chip-text:       var(--text-secondary);
  --chip-remove:     rgba(var(--brand-color-rgb), 1);

  /* Slider */
  --slider-track:    #393e55;
  --slider-fill:     rgba(var(--brand-color-rgb), 1);
  --slider-thumb:    var(--brand-color);
  --slider-thumb-ring: rgba(var(--brand-color-rgb), .35);
}

/* ────────────────────────────────────────────────────────────────────────────────
   2) Reset & Base
──────────────────────────────────────────────────────────────────────────────── */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}

body {
  background: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: hidden;
}

/* ────────────────────────────────────────────────────────────────────────────────
   3) Main Container + Fade-in
──────────────────────────────────────────────────────────────────────────────── */
.qb-main { padding: 2rem 1rem; }

.qb-container {
  width: 95%;
  margin: 0 auto;
  background-color: var(--bg-container);
  border-radius: 12px;
  padding: 3rem 2rem 3.5rem;
  box-shadow: 0 6px 20px var(--shadow-light);
  position: relative;
  overflow: hidden;
}

/* Fade-in animation */
.fade-in { animation: fadeInContainer 0.7s ease forwards; }
@keyframes fadeInContainer {
  from { opacity: 0; transform: translateY(15px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ────────────────────────────────────────────────────────────────────────────────
   4) Titles & Subtitles
──────────────────────────────────────────────────────────────────────────────── */
.qb-title {
  font-size: 2.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  text-align: center;
  color: var(--text-primary);
}
.qb-subtitle {
  font-size: 1rem;
  color: var(--text-subtitle);
  margin-bottom: 2rem;
  text-align: center;
}

/* ────────────────────────────────────────────────────────────────────────────────
   5) Language Selector
──────────────────────────────────────────────────────────────────────────────── */
.qb-language {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 20px 0;
  color: var(--brand-color);
  font-size: 16px;
}

.qb-select {
  padding: 8px 12px;
  border: 2px solid var(--brand-color);
  border-radius: 6px;
  background: var(--bg-container);
  color: var(--brand-color);
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  outline: none;
  transition: all 0.3s ease;
}
.qb-select:hover { background-color: rgba(var(--brand-color-rgb), 0.05); }
.qb-select:focus { box-shadow: 0 0 0 3px rgba(var(--brand-color-rgb), 0.25); }

/* ────────────────────────────────────────────────────────────────────────────────
   6) Tabs & Toolbar (Mode / Style / Tone)
──────────────────────────────────────────────────────────────────────────────── */
.qb-toolbar { display: flex; flex-wrap: nowrap; gap: 1.5rem; overflow-x: auto; margin-bottom: 1.5rem; }
.qb-section-group { flex-shrink: 0; min-width: 250px; }

.qb-tabs {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border-default);
  margin-bottom: 1rem;
}

.qb-tab {
  white-space: nowrap;
  padding: 0.75rem 1.25rem;
  margin-right: 0.5rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
  background-color: var(--bg-tab);
  border: 1px solid var(--border-default);
  border-bottom: none;
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}
.qb-tab:hover { background-color: var(--bg-tab-hover); }
.qb-tab.active {
  background-color: var(--brand-color);
  color: var(--text-light);
  border-color: var(--brand-color);
}

/* Tooltip for tabs */
.qb-tab[data-tooltip] { position: relative; }
.qb-tab[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  background-color: #111;
  color: #fff;
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 4px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 99;
}
.qb-tab[data-tooltip]:hover::after { opacity: 1; }

/* Section Titles */
.qb-section-title {
  font-family: 'Poppins', 'Roboto', sans-serif;
  color: var(--brand-color);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 2px;
  padding-left: 2px;
  cursor: auto;
  background: none;
  border: none;
}

/* ────────────────────────────────────────────────────────────────────────────────
   7) Meta Bar (trust message + model badge + export buttons)
──────────────────────────────────────────────────────────────────────────────── */
.qb-meta-bar{
  margin-top: 1rem;
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  padding: 10px 12px;
  background: var(--control-surface);
  border: 1px solid var(--control-border);
  border-radius: 12px;
}
.qb-meta-left{
  display:flex; align-items:center; gap:10px; flex-wrap:wrap;
  color: var(--text-subtitle); font-size:.9rem;
}
.qb-trust-dot{
  width:10px; height:10px; border-radius:50%;
  background: radial-gradient(circle at 60% 40%, rgba(var(--brand-color-rgb),.9), var(--brand-color));
  box-shadow: 0 0 0 3px rgba(var(--brand-color-rgb), .12);
}
.qb-model-badge{
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(var(--brand-color-rgb), .08);
  color: var(--text-secondary);
  border: 1px solid rgba(var(--brand-color-rgb), .18);
}
.qb-model-badge strong{ color: var(--brand-color); font-weight: 700; }

/* Export buttons cluster */
.qb-meta-right{ display:flex; align-items:center; gap:8px; flex-wrap:wrap; }
.qb-export-btn{
  display:inline-flex; align-items:center; gap:6px;
  padding: 8px 12px; font-size: .9rem; font-weight: 600;
  background: var(--bg-tab); color: var(--text-secondary);
  border: 1px solid var(--control-border);
  border-radius: 10px; cursor:pointer;
  transition: background-color .2s ease, transform .08s ease, box-shadow .2s ease;
}
.qb-export-btn:hover{
  background: var(--bg-tab-hover);
  box-shadow: 0 2px 8px var(--shadow-light);
}
.qb-export-btn:active{ transform: translateY(1px); }
.qb-export-btn i{ color: var(--brand-color); }

/* ────────────────────────────────────────────────────────────────────────────────
   8) Controls Panel (Protected words + Strength + Quality)
──────────────────────────────────────────────────────────────────────────────── */
.qb-section-controls{ margin-top: .5rem; }

.qb-controls{
  display:grid;
  grid-template-columns: 1fr 230px 200px;
  gap:14px;
  align-items:start;
  background: var(--control-surface);
  border: 1px solid var(--control-border);
  border-radius: 12px;
  padding: 14px;
}

.qb-control label{
  display:block;
  margin-bottom:8px;
  font-weight:600;
  color: var(--text-secondary);
}

/* Protected words chips */
.qb-chips{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  min-height:40px;
  padding:8px;
  border:1px dashed var(--control-border);
  border-radius:10px;
  background: var(--bg-input);
}
.qb-chip{
  display:inline-flex;
  gap:6px;
  align-items:center;
  padding:6px 10px;
  border-radius:999px;
  background: var(--chip-bg);
  color: var(--chip-text);
  font-size:12px;
  line-height:1;
  border:1px solid transparent;
  transition: border-color .15s ease, transform .1s ease;
}
.qb-chip:hover{ border-color: var(--brand-color); transform: translateY(-1px); }
.qb-chip-remove{ cursor:pointer; opacity:.8; color: var(--chip-remove); }
.qb-chip-remove:hover{ opacity:1; }

/* Chip input */
.qb-chip-input{
  width:100%;
  padding:10px 12px;
  border:1px solid var(--control-border);
  border-radius:10px;
  margin-top:8px;
  background: var(--bg-container);
  color: var(--text-primary);
  outline:none;
  transition: box-shadow .2s ease, border-color .2s ease;
}
.qb-chip-input:focus{
  border-color: var(--brand-color);
  box-shadow: 0 0 0 3px rgba(var(--brand-color-rgb), .18);
}

/* Quality dropdown (inherits .qb-select) */
.qb-control .qb-select{
  width:100%;
  height: 40px;
  border-radius:10px;
}

/* Strength range */
#qb-strength{
  --percent: 50%; /* JS updates this */
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 10px;
  border-radius: 999px;
  outline: none;
  background:
    linear-gradient(to right,
      var(--slider-fill) 0%,
      var(--slider-fill) var(--percent),
      var(--slider-track) var(--percent),
      var(--slider-track) 100%);
  border: 1px solid var(--control-border);
  transition: box-shadow .2s ease, border-color .2s ease, background .2s linear;
}
#qb-strength:focus{
  box-shadow: 0 0 0 3px var(--slider-thumb-ring);
  border-color: var(--brand-color);
}
#qb-strength::-webkit-slider-thumb{
  -webkit-appearance: none;
  appearance: none;
  width: 18px; height: 18px;
  background: var(--slider-thumb);
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,.15);
  cursor: pointer;
  margin-top: -4px; /* centers thumb */
}
#qb-strength::-moz-range-track{ height:10px; border-radius:999px; background: transparent; }
#qb-strength::-moz-range-progress{ height:10px; border-radius:999px; background: var(--slider-fill); }
#qb-strength::-moz-range-thumb{
  width: 18px; height: 18px;
  background: var(--slider-thumb);
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,.15);
  cursor: pointer;
}

/* Strength value bubble */
#qb-strength-value{
  display:inline-block;
  min-width: 2ch;
  color: var(--brand-color);
  font-weight: 700;
}

/* ────────────────────────────────────────────────────────────────────────────────
   9) Tool Sections (Input / Output panels)
──────────────────────────────────────────────────────────────────────────────── */
.qb-tool { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.qb-section { display: flex; flex-direction: column; margin: 1rem 0; }
.qb-label { font-weight: 500; color: var(--text-secondary); }
.input-upper-part,
.output-upper-part { display: flex; align-items: center; justify-content: space-between; margin-bottom: .5rem; }

.qb-textarea-container { position: relative; display: flex; align-items: center; }
.qb-textarea {
  width: 100%;
  resize: vertical;
  padding: 2rem 4rem 1rem 1rem;
  border: 1px solid var(--border-default);
  border-radius: 8px;
  font-size: 1rem;
  color: var(--text-secondary);
  min-height: 300px;
  background-color: var(--bg-input);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}
.qb-textarea:hover { background-color: var(--bg-container); }
.qb-textarea:focus {
  outline: none;
  border-color: var(--brand-color);
  box-shadow: 0 0 0 3px rgba(var(--brand-color-rgb), 0.15);
}

.qb-textarea-button {
  background: transparent;
  border: 1px solid var(--border-default);
  color: var(--text-muted);
  border-radius: 6px;
  padding: 0.3rem 0.6rem;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}
.qb-textarea-button:hover { border: 1px solid var(--text-secondary); }

/* Input footer (counter, file info, upload) */
.qb-count { margin-top: 0.5rem; font-size: 0.9rem; color: var(--text-subtitle); }
.qb-input-footer { display: flex; justify-content: space-between; align-items: center; margin-top: 0.5rem; }

.qb-upload-btn {
  font-size: 0.85rem;
  border: 1px solid #ccc;
  border-radius: 6px;
  padding: 0.3rem 0.7rem;
  cursor: pointer;
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}
.qb-upload-btn:hover { background-color: var(--bg-tab-hover); box-shadow: 0 2px 6px var(--shadow-light); }

.file-info { font-size: 0.9rem; color: var(--text-subtitle); margin-right: 12px; display: inline-block; }
.hidden { display: none !important; }

/* ────────────────────────────────────────────────────────────────────────────────
   10) Buttons & Actions (CTA Row)
──────────────────────────────────────────────────────────────────────────────── */
.qb-actions { margin-top: 2rem; display: flex; justify-content: flex-end; gap: 1rem; }

.qb-button {
  padding: 0.8rem 1.8rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.1s ease, box-shadow 0.2s ease;
}
.qb-button--animated:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--shadow-light);
}
.qb-button--animated:active { transform: translateY(0); box-shadow: none; }

.qb-button--primary {
  background: linear-gradient(135deg, var(--brand-gradient-start), var(--brand-gradient-end));
  color: var(--text-light);
}
.qb-button--primary:hover { background: linear-gradient(135deg, var(--brand-color), var(--brand-gradient-end)); }

.qb-button--secondary {
  background-color: var(--bg-tab);
  color: var(--text-secondary);
  box-shadow: 0 2px 6px var(--shadow-light);
}
.qb-button--secondary:hover { background-color: var(--bg-tab-hover); }

/* Loader spinner + disabled state */
.qb-btn-spinner {
  display: inline-block;
  width: 18px; height: 18px;
  margin-left: 10px;
  border: 3px solid var(--text-light);
  border-top: 3px solid transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.qb-button:disabled { opacity: 0.6; cursor: not-allowed; }

/* ────────────────────────────────────────────────────────────────────────────────
   11) Highlight & Diff (visual comparison)
──────────────────────────────────────────────────────────────────────────────── */
.qb-highlight-container {
  border: 1px solid var(--border-default);
  padding: 1rem;
  border-radius: 4px;
  white-space: pre-wrap;
}
.diff-added {
  background: var(--diff-added-bg);
  color: var(--diff-added-text);
  border-radius: 3px;
  padding: 0 2px;
}
.diff-deleted {
  background: var(--diff-del-bg);
  color: var(--diff-del-text);
  text-decoration: line-through;
  border-radius: 3px;
  padding: 0 2px;
}

/* ────────────────────────────────────────────────────────────────────────────────
   12) “Why Snip Text” Marketing Section
──────────────────────────────────────────────────────────────────────────────── */
.qb-why-snip {
  background: linear-gradient(135deg, var(--bg-highlight) 0%, var(--bg-container) 100%);
  position: relative;
  overflow: hidden;
  padding: 2rem 20px;
}
.qb-svg-bg::before {
  content: '';
  position: absolute;
  top: -100px; left: -150px;
  width: 400px; height: 400px;
  background: radial-gradient(circle at center, var(--bg-svg-circle) 0%, transparent 70%);
  transform: rotate(30deg);
  z-index: 0;
}
.qb-why-container {
  max-width: 1200px;
  margin: auto;
  text-align: center;
  position: relative;
  z-index: 2;
}
.qb-why-title {
  font-size: 2.4rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 50px;
}
.qb-why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
  text-align: left;
}
.qb-why-box {
  background: var(--bg-container);
  padding: 30px 25px;
  border-radius: 16px;
  box-shadow: 0 10px 30px var(--shadow-light);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  opacity: 0;
  transform: translateY(30px);
}
.qb-why-box:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 12px 40px var(--shadow-medium);
}
.qb-why-box h3 {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin: 15px 0 10px;
}
.qb-why-box p {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-muted);
}
.qb-icon { font-size: 1.8rem; color: var(--brand-color); }

/* Reveal on scroll */
.fade-in-box.fade-in-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

/* ────────────────────────────────────────────────────────────────────────────────
   13) Responsive Breakpoints (all consolidated)
   - Each breakpoint groups ALL related components’ responsive tweaks
──────────────────────────────────────────────────────────────────────────────── */

/* ≥ 0 to 1100px */
@media (max-width: 1100px){
  /* Controls: collapse to two columns */
  .qb-controls{
    grid-template-columns: 1fr 1fr;
  }
}

/* ≥ 0 to 1024px */
@media (max-width: 1024px) {
  /* Container padding tighter on tablets */
  .qb-container { padding: 2rem 1.5rem 2.5rem; }
}

/* ≥ 0 to 768px */
@media (max-width: 768px) {
  /* Language: keep dropdown full width on small screens */
  /* .qb-language { flex-direction: column; align-items: flex-start; } */
  .qb-select { width: 100%; }

  /* Tabs: scrollable row */
  .qb-tabs {
    display: flex; overflow-x: auto; -webkit-overflow-scrolling: touch;
    flex-wrap: nowrap; gap: 0.5rem; margin-bottom: 0.75rem;
    padding-bottom: 1rem; scroll-padding-bottom: 1rem;
  }
  .qb-tab { flex: none; }

  /* Container + layout */
  .qb-container { padding: 2rem 1rem 2.5rem; }
  .qb-tool { grid-template-columns: 1fr; }
  .qb-tabs-mode { margin-bottom: 0.5rem; }
  .qb-tabs-style { margin-bottom: 1rem; }

  /* Buttons sizing */
  .qb-button { padding: 0.6rem 1rem; font-size: 0.9rem; }
}

/* ≥ 0 to 720px */
@media (max-width: 720px){
  /* Meta bar: stack trust/model + export buttons */
  .qb-meta-bar{ flex-direction: column; align-items: stretch; }
  .qb-meta-right{ justify-content: flex-start; }
}

/* ≥ 0 to 700px */
@media (max-width: 700px){
  /* Controls: single column on phones */
  .qb-controls{
    grid-template-columns: 1fr;
  }
}

/* ≥ 0 to 480px */
@media (max-width: 480px) {
  /* Overall sizing */
  .qb-container { padding: 1.5rem 1rem 2rem; }
  .qb-title { font-size: 1.8rem; }
  .qb-subtitle { font-size: 0.95rem; }

  /* Tabs sizing */
  .qb-tab { font-size: 0.85rem; padding: 0.6rem 1rem; }
  .qb-tabs { gap: 0.4rem; }

  /* Text area */
  .qb-textarea { font-size: 0.95rem; min-height: 200px; }

  /* Minor text/button tweaks */
  .qb-count { font-size: 0.85rem; }
  .qb-button { padding: 0.5rem 1rem; font-size: 0.75rem; }
}

/* ≥ 0 to 360px */
@media (max-width: 360px) {
  .qb-container { padding: 1rem 0.75rem 1.5rem; border-radius: 6px; }
  .qb-title { font-size: 1.5rem; margin-bottom: 0.25rem; }
  .qb-subtitle { font-size: 0.9rem; margin-bottom: 1.25rem; }

  .qb-tab { font-size: 0.8rem; padding: 0.5rem 0.75rem; margin-right: 0.4rem; }
  .qb-tabs { gap: 0.3rem; }
  .qb-tool { gap: 1rem; }

  .qb-textarea { font-size: 0.85rem; min-height: 120px; }
  .qb-count { font-size: 0.8rem; width: 50%; }

  .qb-button {
    width: 100%; max-width: 300px;
    padding: 0.3rem 1rem; font-size: 0.5rem;
  }
}