/* ===== CMS THEME VARIABLES (Dreamweaver Safe - UTF-8 Only) ===== */
:root {
  --primary: #1EB6DE;
  --primary-dark: #1892B2;
  --light-bg: #F8FCFF;
  --border: #e1e5f1;
  --text: #1e293b;
  --text-light: #475569;
  --card-bg: #ffffff;
  --toast-bg: #2c3e50;
  --switch-bg: #cbd5e1;
  --switch-active: #1ba4c8;
  --danger: #e53e3e;
  --success: #2c7a4d;
  --warning: #ed8936;
  --info: #4299e1;
}
[data-theme="dark"] {
  --primary: #1EB6DE;
  --primary-dark: #1892B2;
  --light-bg: #292b32;
  --border: #4a4a5a;
  --text: #f1f5f9;
  --text-light: #cbd5e1;
  --card-bg: #1e1f28;
  --toast-bg: #111827;
  --switch-bg: #4b5563;
  --switch-active: #1ba4c8;
  --danger: #f56565;
  --success: #48bb78;
  --warning: #f6ad55;
  --info: #63b3ed;
}

/* ===== GLOBAL UTILITIES ===== */
.fa-sm { font-size: 0.875em; vertical-align: -0.1em; }
button i { display: inline-flex; align-items: center; justify-content: center; width: 1em; }
.panel-hidden { display: none !important; }
code { background: var(--light-bg); padding: 2px 6px; border-radius: 3px; font-size: 12px; color: var(--text); border: 1px solid var(--border); }
input[type="file"] { display: none; }

/* ===== BUTTONS (CMS Compatible - NO .btn CLASS) ===== */
button {
  font-family: inherit; font-size: 13px; font-weight: 600; border-radius: 3px; cursor: pointer;
  transition: all 0.2s; display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; background: var(--light-bg); color: var(--text); border: 1px solid var(--border);
  min-height: 38px; padding: 0 14px; white-space: nowrap; text-shadow: none;
}
button:hover { border-color: var(--primary) !important; color: var(--text); }
button:active { transform: translateY(0); }
button:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }
button.primary { background: var(--primary); border-color: var(--primary); color: white; }
button.primary:hover { background: var(--primary-dark); }
button.secondary { background: var(--light-bg); border: 1px solid var(--border); }
button.secondary:hover { border-color: var(--primary); background: rgba(30, 182, 222, 0.1); }
button.success-btn { background: rgba(44, 122, 77, 0.12); border-color: var(--success); color: var(--success); }
button.success-btn:hover { background: rgba(44, 122, 77, 0.2); }
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* ===== CONTAINER & LAYOUT ===== */
.container-custom {
    max-width: 1600px; margin: 0 auto; border-radius: 5px; background: var(--card-bg);
    box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.1); transition: background 0.2s; overflow: hidden;
}
.tool-header { padding: 20px 24px 0 24px; border-bottom: 1px solid var(--border); }
.tool-header-content { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.tool-title { margin: 0; color: var(--primary); font-size: 1.4rem; display: flex; align-items: center; gap: 10px; }
.tool-subtitle { margin: 4px 0 0 0; color: var(--text-light); font-size: 0.9rem; }

/* STACKED LAYOUT */
.text-columns-wrapper { display: flex; flex-direction: column; gap: 24px; }
.input-column, .output-column { flex: 1; width: 100%; min-width: 0; display: flex; flex-direction: column; }

/* ===== TEXTAREAS ===== */
textarea {
  width: 100%; max-width: 100%; border: 1px solid var(--border); background: var(--card-bg);
  resize: vertical; font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.9rem; line-height: 1.5; color: var(--text); padding: 14px;
  outline: none; min-height: 300px; height: auto; box-sizing: border-box; overflow: auto;
}
textarea:focus { outline: none; box-shadow: none; border-color: var(--primary); }
.output-view { display: none; min-height: 300px; }
.output-view.active { display: block; }

/* ===== TEXTAREA - Remove baseline gap ===== */
.input-column textarea {
  display: block;
  margin: 0 !important;
  vertical-align: bottom;
}

/* ===== Ensure source-content has zero bottom padding ===== */
.source-content {
  padding: 0 10px;
}
.source-content > textarea {
  margin-bottom: 0 !important;
}

/* ===== STATS & BARS ===== */
.stats-bar {
  display: flex; gap: 16px; flex-wrap: wrap; align-items: center; font-size: 0.85rem;
  background: var(--light-bg); padding: 0px 10px; border-radius: 5px; margin: 0;
  justify-content: space-between; min-height: 40px; flex-shrink: 0;
}
.stat-badge {
  background: rgba(27,164,200,0.12); padding: 4px 12px; border-radius: 20px;
  font-weight: 600; color: var(--primary);
}

/* ===== SOURCE PANEL (Collapsible + Focus Highlight) ===== */
.source-card {
  background: var(--light-bg);
  overflow: hidden; transition: all 0.3s ease;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.source-card.highlighted {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(30, 182, 222, 0.15);
}
.source-header {
  display: flex; align-items: center; justify-content: space-between;
  cursor: pointer; user-select: none; padding: 8px 16px;
  transition: background 0.2s ease;
}
.source-header:hover { background: rgba(30, 182, 222, 0.12); }
.source-content {
  overflow: hidden; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  max-height: 2000px; opacity: 1; padding: 0 10px;
}
.input-column.collapsed .source-content {
  max-height: 0 !important; opacity: 0; padding: 0 10px;
  visibility: hidden; margin: 0;
}
.input-column.collapsed .collapse-icon { transform: rotate(-90deg); }
.input-column.collapsed { min-height: auto; }

/* ===== OUTPUT PANEL STYLING ===== */
.output-column {
  background: var(--light-bg); overflow: hidden;
    border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.output-content {
  overflow: hidden; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  max-height: 3000px; opacity: 1; padding: 0 10px;
}
.output-column.collapsed .output-content {
  max-height: 0 !important; opacity: 0; padding: 0 10px;
  visibility: hidden; margin: 0;
}
.output-column.collapsed .collapse-icon { transform: rotate(-90deg); }

/* ===== HEADER ALIGNMENT ===== */
.section-title-custom {
  font-size: 1rem; font-weight: 600; color: var(--primary); margin: 0;
  display: flex; align-items: center; gap: 10px;
}
.header-actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

/* ===== OPTIONS PANEL ===== */
.options-panel { padding: 10px 20px; margin-top: 0; background: var(--card-bg); }
.options-header {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap;
  margin-bottom: 12px; gap: 10px;
}
.options-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 18px; margin-top: 8px; align-items: start;
}

/* ===== COLLAPSIBLE OPTION CARDS ===== */
.option-card {
  background: var(--light-bg); border-radius: 8px; padding: 0;
  border: 1px solid var(--border); overflow: hidden; transition: all 0.2s ease;
}
.option-card-header {
  display: flex; align-items: center; justify-content: space-between;
  cursor: pointer; user-select: none; padding: 5px 16px;
  transition: background 0.2s ease; border-bottom: 1px solid rgb(185 178 178 / 15%);
}
.option-card-header:hover { background: rgba(30, 182, 222, 0.1); }
.option-card-title {
  margin: 0; padding: 0; border: none; cursor: pointer; flex: 1;
  font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.5px;
  font-weight: 700; color: var(--primary); pointer-events: none;
  display: flex; align-items: center; gap: 8px;
}
.collapse-icon {
  font-size: 0.85rem; color: var(--primary);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  width: 28px; height: 28px; display: inline-flex;
  align-items: center; justify-content: center;
  border-radius: 6px; background: rgba(27, 164, 200, 0.1);
  cursor: pointer; flex-shrink: 0;
}
.collapse-icon:hover { background: rgba(27, 164, 200, 0.2); }
.option-card.collapsed .collapse-icon { transform: rotate(-90deg); }
.option-card-content {
  overflow: hidden; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  max-height: 2000px; opacity: 1; padding: 0 16px 12px 16px;
}
.option-card.collapsed .option-card-content {
  max-height: 0 !important; opacity: 0; padding: 0 16px;
  visibility: hidden; margin: 0;
}
.option-card.collapsed { min-height: auto; }

/* ===== SWITCH ITEMS ===== */
.switch-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 0; border-bottom: 1px solid rgba(0,0,0,0.05);
}
.switch-item:last-child { border-bottom: none; }
.switch-label {
  display: flex; align-items: center; gap: 8px; font-size: 0.85rem;
  font-weight: 500; cursor: pointer; color: var(--text);
}
.switch-label i { width: 20px; color: var(--primary); }
.switch {
  position: relative; display: inline-block; width: 48px; height: 24px;
}
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--switch-bg); transition: 0.25s; border-radius: 24px;
}
.slider:before {
  position: absolute; content: ""; height: 18px; width: 18px; left: 3px; bottom: 3px;
  background-color: white; transition: 0.25s; border-radius: 50%;
}
input:checked + .slider { background-color: var(--switch-active); }
input:checked + .slider:before { transform: translateX(24px); }

/* ===== INPUT GROUPS ===== */
.custom-input-group {
  display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap;
}
.custom-input-group input {
  flex: 1; padding: 8px 10px; border: 1px solid var(--border);
  border-radius: 4px; background: var(--card-bg); color: var(--text);
  font-size: 13px; min-width: 0;
}
.custom-input-group input:focus { outline: none; border-color: var(--primary); }
.helper-text { font-size: 0.75rem; color: var(--text-light); margin-top: 8px; display: flex; align-items: center; gap: 6px; }
.helper-text i { color: var(--primary); }

/* ===== TABS ===== */
.tabs { display: flex; gap: 4px; flex-wrap: wrap; margin: 0; }
.tab-btn {
  background: none; border: none !important; border-bottom: 2px solid transparent !important;
  color: var(--text-light); padding: 8px 14px; cursor: pointer; font-size: 13px;
  border-radius: 4px 4px 0 0; display: flex; align-items: center; gap: 6px; font-weight: 500;
  transition: all 0.15s ease; transform: none !important; filter: none !important;
}
.tab-btn:hover { transform: none !important; filter: none !important; color: var(--text); background: rgba(30, 182, 222, 0.08); border-bottom-color: var(--primary) !important; }
.tab-btn.active { background: var(--light-bg); color: var(--primary); border-bottom: 2px solid var(--primary) !important; font-weight: 600; }

/* ===== VIEW CONTAINER ===== */
.view-container {
  background: var(--light-bg); border-radius: 5px; padding: 16px; min-height: 300px;
  max-height: 65vh; overflow: auto; font-size: 13px; line-height: 1.5; border: 1px solid var(--border);
}
.view-container img { max-width: 100%; height: auto; border-radius: 4px; }
.view-container pre { background: var(--card-bg); padding: 12px; border-radius: 4px; overflow-x: auto; border: 1px solid var(--border); }
.view-container code { background: none; padding: 0; border: none; }

/* ===== STAT CARDS ===== */
.stats-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px;
}
.stat-card {
  background: linear-gradient(135deg, var(--card-bg) 0%, rgba(30, 182, 222, 0.04) 100%);
  border: 1px solid var(--border); border-left: 3px solid var(--primary);
  border-radius: 6px; padding: 16px 14px; text-align: center;
  transition: all 0.2s ease; position: relative; overflow: hidden;
}
.stat-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0; transition: opacity 0.2s;
}
.stat-card:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(30, 182, 222, 0.12); border-left-color: var(--primary-dark); }
.stat-card:hover::before { opacity: 1; }
.stat-card .val { font-size: 26px; font-weight: 700; color: var(--text); display: block; line-height: 1.2; margin-bottom: 4px; }
.stat-card .label { font-size: 11px; color: var(--text-light); text-transform: uppercase; letter-spacing: 0.6px; font-weight: 500; display: block; }

/* ===== ENCODING INFO ===== */
.encoding-info {
  font-size: 11px; color: var(--text-light); background: var(--light-bg);
  padding: 4px 10px; border-radius: 4px; display: inline-flex; align-items: center;
  gap: 6px; margin-top: 8px; border: 1px dashed var(--border);
}
.encoding-info strong { color: var(--text); font-weight: 600; }

/* ===== ACTION BAR ===== */
.action-buttons-bar {
  display: flex; gap: 12px; flex-wrap: wrap; padding: 16px 20px;
  background: var(--card-bg); border-top: 1px solid var(--border);
}

/* ===== TOAST NOTIFICATIONS ===== */
#toastContainer { position: fixed; bottom: 24px; right: 24px; z-index: 1000; }
.toast {
  background: var(--toast-bg); color: white; padding: 12px 20px; border-radius: 5px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15); display: flex; align-items: center; gap: 10px;
  font-size: 14px; margin-top: 8px; animation: slideUp 0.3s ease, fadeOut 0.3s ease 2.7s forwards;
  max-width: 350px; border-left: 4px solid var(--primary);
}
.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.info { border-left-color: var(--info); }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeOut { to { opacity: 0; transform: translateY(10px); } }

/* ===== COPY FEEDBACK ===== */
@keyframes copyFlash {
  0%, 100% { background: var(--card-bg); }
  50% { background: rgba(44, 122, 77, 0.15); border-color: var(--success); }
}
.copy-feedback { animation: copyFlash 0.4s ease; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .text-columns-wrapper { padding: 16px; }
  textarea { min-height: 280px; }
}
@media (max-width: 600px) {
  .tool-header-content { flex-direction: column; align-items: flex-start; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .action-buttons-bar { flex-direction: column; }
  button { width: 100%; justify-content: center; }
}