/*
 * Markdown Unwrapper Styling
 * High-end premium dark/light fluid aesthetics
 */

/* ----------------------------------------------------
   1. Design System Tokens & Root
   ---------------------------------------------------- */
:root {
  /* Common Fonts */
  --font-ui: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  /* Theme: Dark (Default) */
  --bg-app: #090d16;
  --bg-gradient: radial-gradient(circle at 50% 0%, #151e36 0%, #090d16 100%);
  --bg-glow: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.15) 0%, rgba(168, 85, 247, 0.05) 50%, transparent 100%);
  
  --color-pane-bg: rgba(20, 26, 42, 0.7);
  --color-pane-border: rgba(255, 255, 255, 0.07);
  --color-pane-shadow: rgba(0, 0, 0, 0.35);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-primary: #6366f1;
  --accent-secondary: #a855f7;
  --accent-gradient: linear-gradient(135deg, #6366f1, #a855f7);
  --accent-glow: rgba(99, 102, 241, 0.4);
  
  --btn-sec-bg: rgba(255, 255, 255, 0.05);
  --btn-sec-border: rgba(255, 255, 255, 0.08);
  --btn-sec-text: #e2e8f0;
  --btn-sec-hover-bg: rgba(255, 255, 255, 0.1);
  
  --textarea-bg: rgba(13, 17, 28, 0.5);
  --textarea-border: rgba(255, 255, 255, 0.05);
  --textarea-focus-border: #6366f1;
  --textarea-focus-shadow: rgba(99, 102, 241, 0.15);
  
  --scrollbar-track: rgba(13, 17, 28, 0.3);
  --scrollbar-thumb: rgba(255, 255, 255, 0.1);
  --scrollbar-thumb-hover: rgba(255, 255, 255, 0.2);

  --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-bounce: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-theme="light"] {
  /* Theme: Light */
  --bg-app: #f4f6fa;
  --bg-gradient: radial-gradient(circle at 50% 0%, #e2e8f0 0%, #f4f6fa 100%);
  --bg-glow: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.06) 0%, rgba(168, 85, 247, 0.03) 50%, transparent 100%);
  
  --color-pane-bg: rgba(255, 255, 255, 0.85);
  --color-pane-border: rgba(0, 0, 0, 0.06);
  --color-pane-shadow: rgba(15, 23, 42, 0.08);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --accent-primary: #4f46e5;
  --accent-secondary: #9333ea;
  --accent-gradient: linear-gradient(135deg, #4f46e5, #9333ea);
  --accent-glow: rgba(79, 70, 229, 0.2);
  
  --btn-sec-bg: rgba(0, 0, 0, 0.03);
  --btn-sec-border: rgba(0, 0, 0, 0.05);
  --btn-sec-text: #334155;
  --btn-sec-hover-bg: rgba(0, 0, 0, 0.06);
  
  --textarea-bg: rgba(255, 255, 255, 0.8);
  --textarea-border: rgba(0, 0, 0, 0.04);
  --textarea-focus-border: #4f46e5;
  --textarea-focus-shadow: rgba(79, 70, 229, 0.08);
  
  --scrollbar-track: rgba(0, 0, 0, 0.02);
  --scrollbar-thumb: rgba(0, 0, 0, 0.15);
  --scrollbar-thumb-hover: rgba(0, 0, 0, 0.25);
}

/* ----------------------------------------------------
   2. Reset & Global Styles
   ---------------------------------------------------- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-ui);
  color: var(--text-primary);
  background-color: var(--bg-app);
  background-image: var(--bg-gradient);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

/* Background gradient blurs */
.bg-gradient-glow {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: var(--bg-glow);
  z-index: 0;
  pointer-events: none;
}

/* ----------------------------------------------------
   3. Application Container Layout
   ---------------------------------------------------- */
.app-container {
  max-width: 1600px;
  width: 100%;
  margin: 0 auto;
  padding: 24px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  z-index: 1;
  position: relative;
}

/* ----------------------------------------------------
   4. Header Section
   ---------------------------------------------------- */
.app-header {
  margin-bottom: 24px;
  position: relative;
}

.header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-pane-border);
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo-icon {
  background: var(--accent-gradient);
  color: #ffffff;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px var(--accent-glow);
  flex-shrink: 0;
}

.logo-icon svg {
  width: 24px;
  height: 24px;
  animation: logo-float 4s ease-in-out infinite;
}

.logo-text h1 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-text p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ----------------------------------------------------
   5. Buttons & Controls
   ---------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  font-family: var(--font-ui);
  transition: var(--transition-bounce);
  border: 1px solid transparent;
  user-select: none;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 12px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--btn-sec-bg);
  border-color: var(--btn-sec-border);
  color: var(--btn-sec-text);
}

.btn-secondary:hover {
  background: var(--btn-sec-hover-bg);
  transform: translateY(-1px);
}

.btn-secondary:active {
  transform: translateY(0);
}

.btn-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--btn-sec-bg);
  border: 1px solid var(--btn-sec-border);
  color: var(--btn-sec-text);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-bounce);
}

.btn-circle:hover {
  background: var(--btn-sec-hover-bg);
  transform: scale(1.08) rotate(15deg);
}

.btn-circle:active {
  transform: scale(0.95);
}

.icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  transition: var(--transition-smooth);
}

.hidden {
  display: none !important;
}

/* Theme Toggle Icons state */
[data-theme="dark"] .icon-sun {
  display: block;
}
[data-theme="dark"] .icon-moon {
  display: none;
}
[data-theme="light"] .icon-sun {
  display: none;
}
[data-theme="light"] .icon-moon {
  display: block;
}

/* ----------------------------------------------------
   6. Workspace Dual-Pane Layout
   ---------------------------------------------------- */
.workspace {
  flex-grow: 1;
  display: grid;
  grid-template-columns: 1fr 40px 1fr;
  gap: 0;
  margin-bottom: 24px;
}

@media (max-width: 1024px) {
  .workspace {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr auto 1fr;
    gap: 16px;
  }
  
  .workspace-divider {
    transform: rotate(90deg);
    padding: 8px 0;
  }
}

/* ----------------------------------------------------
   7. Panes & Cards
   ---------------------------------------------------- */
.pane {
  background: var(--color-pane-bg);
  border: 1px solid var(--color-pane-border);
  border-radius: 20px;
  box-shadow: 0 10px 30px var(--color-pane-shadow);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.pane:hover {
  border-color: rgba(99, 102, 241, 0.2);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25);
}

.pane-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--color-pane-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.pane-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.pane-title h2 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.2px;
}

.badge {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 4px 8px;
  border-radius: 6px;
  color: #ffffff;
}

.badge-primary {
  background: linear-gradient(135deg, #3b82f6, #6366f1);
}

.badge-accent {
  background: linear-gradient(135deg, #a855f7, #ec4899);
}

.pane-meta {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}

.pane-body {
  flex-grow: 1;
  position: relative;
  display: flex;
  flex-direction: column;
}

.editor-container {
  display: flex;
  flex-grow: 1;
  min-height: 500px;
  background: var(--textarea-bg);
  transition: var(--transition-smooth);
  position: relative;
}

.line-numbers {
  width: 54px;
  padding: 24px 12px 24px 0;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-muted);
  text-align: right;
  background: rgba(0, 0, 0, 0.12);
  border-right: 1px solid var(--color-pane-border);
  user-select: none;
  white-space: pre;
  overflow: hidden;
  pointer-events: none; /* Click pass-through */
  opacity: 0.65;
  transition: var(--transition-smooth);
}

.pane:focus-within .line-numbers {
  opacity: 1;
  color: var(--accent-primary);
  background: rgba(0, 0, 0, 0.18);
}

/* Read-Only Output Editor with row-by-row layout */
.editor-container.read-only {
  display: block;
  overflow-y: auto;
  padding: 24px 0;
  min-height: 500px;
  background: var(--textarea-bg);
  transition: var(--transition-smooth);
}

.line-row {
  display: flex;
  width: 100%;
  align-items: stretch;
}

.line-row .line-number {
  width: 54px;
  padding-right: 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-muted);
  text-align: right;
  background: rgba(0, 0, 0, 0.12);
  border-right: 1px solid var(--color-pane-border);
  user-select: none;
  -webkit-user-select: none;
  flex-shrink: 0;
  opacity: 0.65;
  transition: var(--transition-smooth);
}

.line-row:hover .line-number {
  opacity: 1;
  color: var(--accent-primary);
  background: rgba(0, 0, 0, 0.16);
}

.line-row .line-content {
  flex-grow: 1;
  padding: 0 24px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-word;
}

textarea {
  width: 100%;
  flex-grow: 1;
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  padding: 24px;
  resize: none;
  outline: none;
  transition: var(--transition-smooth);
}

textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.6;
}

textarea:focus {
  background: rgba(13, 17, 28, 0.1);
}

.pane-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.pane-stats {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
  margin-right: 8px;
}

/* Custom Scrollbars for Read-Only Editor */
.editor-container.read-only::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

.editor-container.read-only::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

.editor-container.read-only::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 5px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

.editor-container.read-only::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
  border: 2px solid transparent;
  background-clip: padding-box;
}

/* Custom Scrollbars */
textarea::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

textarea::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

textarea::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 5px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

textarea::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
  border: 2px solid transparent;
  background-clip: padding-box;
}

/* ----------------------------------------------------
   9. Mid-Workspace Divider
   ---------------------------------------------------- */
.workspace-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
}

.divider-arrow {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-pane-bg);
  border: 1px solid var(--color-pane-border);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  transition: var(--transition-bounce);
}

.workspace-divider:hover .divider-arrow {
  transform: scale(1.15);
  border-color: var(--accent-primary);
  color: var(--text-primary);
  box-shadow: 0 0 12px var(--accent-glow);
}

.divider-arrow svg {
  width: 14px;
  height: 14px;
}

/* ----------------------------------------------------
   9.5. FAQ & SEO Section
   ---------------------------------------------------- */
.faq-section {
  margin-top: 48px;
  margin-bottom: 32px;
  position: relative;
  z-index: 2;
}

.faq-header {
  text-align: center;
  margin-bottom: 32px;
}

.faq-header h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  margin-bottom: 8px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.faq-header p {
  font-size: 14px;
  color: var(--text-secondary);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}

.faq-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.2px;
  border-left: 3px solid var(--accent-primary);
  padding-left: 10px;
  margin-bottom: 4px;
}

.faq-card p {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.faq-card code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--textarea-bg);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--color-pane-border);
  color: var(--text-primary);
}

/* ----------------------------------------------------
   10. Footer Section
   ---------------------------------------------------- */
.app-footer {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--color-pane-border);
  text-align: center;
}

.footer-content p {
  font-size: 12px;
  color: var(--text-muted);
}

/* ----------------------------------------------------
   11. Animations
   ---------------------------------------------------- */
@keyframes logo-float {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-3px) rotate(3deg); }
  100% { transform: translateY(0px) rotate(0deg); }
}