/* ============================================
   OLE Markdown Easy — Editorial Design System
   Based on design.md tokens
   ============================================ */

/* Google Fonts — EB Garamond (Waldenburg substitute) + Inter */
@import url('https://fonts.googleapis.com/css2?family=EB+Garamond:wght@300;400&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

/* ============================================
   Design Tokens
   ============================================ */
:root {
  /* ---- Colors: Brand ---- */
  --color-primary: #292524;
  --color-primary-active: #0c0a09;

  /* ---- Colors: Surface ---- */
  --color-canvas: #f5f5f5;
  --color-canvas-soft: #fafafa;
  --color-surface-card: #ffffff;
  --color-surface-strong: #f0efed;

  /* ---- Colors: Hairlines ---- */
  --color-hairline: #e7e5e4;
  --color-hairline-soft: #f0efed;
  --color-hairline-strong: #d6d3d1;

  /* ---- Colors: Text ---- */
  --color-ink: #0c0a09;
  --color-body: #4e4e4e;
  --color-body-strong: #292524;
  --color-muted: #777169;
  --color-muted-soft: #a8a29e;
  --color-on-primary: #ffffff;

  /* ---- Colors: Atmospheric Gradients ---- */
  --gradient-mint: #a7e5d3;
  --gradient-peach: #f4c5a8;
  --gradient-lavender: #c8b8e0;
  --gradient-sky: #a8c8e8;
  --gradient-rose: #e8b8c4;

  /* ---- Colors: Semantic ---- */
  --color-success: #16a34a;
  --color-error: #dc2626;

  /* ---- Typography ---- */
  --font-display: 'EB Garamond', 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* ---- Spacing ---- */
  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-base: 16px;
  --space-md: 20px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  --space-section: 96px;

  /* ---- Radius ---- */
  --rounded-xs: 4px;
  --rounded-sm: 6px;
  --rounded-md: 8px;
  --rounded-lg: 12px;
  --rounded-xl: 16px;
  --rounded-xxl: 24px;
  --rounded-pill: 9999px;

  /* ---- Elevation ---- */
  --shadow-soft: 0 4px 16px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.06);

  /* ---- Transition ---- */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --duration-slow: 500ms;

  /* ---- Layout ---- */
  --nav-height: 64px;
  --max-width: 1200px;
}

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0.16px;
  color: var(--color-body);
  background-color: var(--color-canvas);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ============================================
   Scrollbar — minimal, editorial
   ============================================ */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--color-hairline-strong);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-muted-soft);
}

/* ============================================
   Atmospheric Gradient Orbs
   ============================================ */
.orb {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  filter: blur(80px);
  opacity: 0.45;
  animation: orb-drift 25s ease-in-out infinite alternate;
}

.orb--mint {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--gradient-mint), transparent 70%);
  top: -100px;
  right: -150px;
}

.orb--peach {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--gradient-peach), transparent 70%);
  bottom: 200px;
  left: -120px;
}

.orb--lavender {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, var(--gradient-lavender), transparent 70%);
  top: 40%;
  right: -80px;
}

@keyframes orb-drift {
  0% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(20px, -15px) scale(1.05); }
  66% { transform: translate(-10px, 10px) scale(0.97); }
  100% { transform: translate(15px, -8px) scale(1.02); }
}

/* ============================================
   Navigation
   ============================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-lg);
  background: rgba(245, 245, 245, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-hairline);
}

.nav__brand {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  text-decoration: none;
}

.nav__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 24px;
  letter-spacing: -0.96px;
  line-height: 1.08;
  color: var(--color-ink);
}

.nav__tag {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.96px;
  text-transform: uppercase;
  color: var(--color-muted);
}

/* ============================================
   Main Container
   ============================================ */
.main {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-sm) var(--space-lg) var(--space-xxl);
}

/* ============================================
   Hero / Drop Zone
   ============================================ */
.hero {
  text-align: center;
  padding: 0 var(--space-lg) var(--space-xl);
  position: relative;
}

.hero__headline {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 48px;
  line-height: 1.08;
  letter-spacing: -0.96px;
  color: var(--color-ink);
  margin-bottom: var(--space-base);
}

.hero__subheadline {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0.16px;
  color: var(--color-body);
  max-width: 520px;
  margin: 0 auto var(--space-xxl);
}

/* ---- Drop Zone ---- */
.dropzone {
  position: relative;
  border: 1px dashed var(--color-hairline-strong);
  border-radius: var(--rounded-xxl);
  padding: var(--space-xxl) var(--space-lg);
  text-align: center;
  background: var(--color-surface-card);
  cursor: pointer;
  transition: border-color var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
  max-width: 680px;
  margin: 0 auto;
}

.dropzone:hover {
  border-color: var(--color-muted-soft);
  box-shadow: var(--shadow-soft);
}

.dropzone.dragover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
  background: var(--color-canvas-soft);
}

.dropzone__icon {
  font-size: 40px;
  display: block;
  margin-bottom: var(--space-base);
  opacity: 0.8;
}

.dropzone__title {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 500;
  line-height: 1.44;
  letter-spacing: 0.18px;
  color: var(--color-ink);
  margin-bottom: var(--space-xxs);
}

.dropzone__subtitle {
  font-size: 15px;
  font-weight: 400;
  color: var(--color-muted);
  letter-spacing: 0.15px;
  margin-bottom: var(--space-lg);
}

.dropzone__formats {
  display: flex;
  justify-content: center;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

.dropzone__input {
  display: none;
}

/* ---- Format Badges (pill shape) ---- */
.format-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--rounded-pill);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.96px;
  text-transform: uppercase;
  background: var(--color-surface-strong);
  color: var(--color-ink);
  border: none;
  transition: transform var(--duration-fast) var(--ease-out);
}

.format-badge:hover {
  transform: translateY(-1px);
}

/* ============================================
   Processing Indicator
   ============================================ */
.processing {
  display: none;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  margin-top: var(--space-lg);
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.processing.active {
  display: flex;
}

.processing__spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-hairline);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.processing__text {
  font-size: 15px;
  font-weight: 400;
  color: var(--color-muted);
  letter-spacing: 0.15px;
}

/* ============================================
   File Info Bar
   ============================================ */
.file-info {
  display: none;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-base);
  margin-top: var(--space-lg);
  border-radius: var(--rounded-xl);
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
}

.file-info.active {
  display: flex;
  animation: fade-in 0.3s var(--ease-out);
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.file-info__icon {
  font-size: 1.35rem;
}

.file-info__details {
  flex: 1;
}

.file-info__name {
  font-weight: 500;
  font-size: 15px;
  color: var(--color-ink);
  word-break: break-all;
}

.file-info__meta {
  font-size: 14px;
  color: var(--color-muted);
  margin-top: 1px;
}

.file-info__status {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--rounded-pill);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.96px;
  text-transform: uppercase;
  background: var(--color-surface-strong);
  color: var(--color-success);
}

/* ============================================
   Editor Section
   ============================================ */
.editor-section {
  display: none;
  margin-top: var(--space-lg);
  border-radius: var(--rounded-xl);
  overflow: hidden;
  border: 1px solid var(--color-hairline);
  background: var(--color-surface-card);
  box-shadow: var(--shadow-soft);
}

.editor-section.active {
  display: block;
  animation: fade-in 0.4s var(--ease-out);
}

/* ---- Editor Tabs ---- */
.editor-tabs {
  display: flex;
  align-items: center;
  background: var(--color-canvas-soft);
  border-bottom: 1px solid var(--color-hairline);
  padding: 0 var(--space-xs);
  overflow-x: auto;
}

.editor-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px var(--space-base);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--color-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out);
  white-space: nowrap;
  user-select: none;
}

.editor-tab:hover {
  color: var(--color-body-strong);
}

.editor-tab.active {
  color: var(--color-ink);
  border-bottom-color: var(--color-primary);
}

.editor-tab__icon {
  font-size: 15px;
}

/* ---- Panels ---- */
.editor-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  height: 75vh;
}

.editor-panels.single-view {
  grid-template-columns: 1fr;
}

.editor-panel {
  display: flex;
  flex-direction: column;
  overflow: auto;
  min-height: 0;
}

.editor-panel:first-child {
  border-right: 1px solid var(--color-hairline);
}

.editor-panel.hidden {
  display: none;
}

/* Panel headers */
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-xs) var(--space-base);
  background: var(--color-canvas-soft);
  border-bottom: 1px solid var(--color-hairline-soft);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.96px;
  text-transform: uppercase;
  color: var(--color-muted);
}

/* Markdown Editor Textarea */
.markdown-editor {
  flex: 1;
  width: 100%;
  padding: var(--space-base);
  background: var(--color-surface-card);
  color: var(--color-ink);
  border: none;
  outline: none;
  resize: none;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.65;
  tab-size: 2;
  overflow-y: auto;
}

.markdown-editor::placeholder {
  color: var(--color-muted-soft);
}

/* Preview Panel */
.markdown-preview {
  flex: 1;
  padding: var(--space-base) var(--space-lg);
  overflow-y: auto;
  overflow-x: auto;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0.16px;
  color: var(--color-body);
  word-wrap: break-word;
  overflow-wrap: break-word;
}

/* ============================================
   Markdown Preview Typography
   ============================================ */
.markdown-preview h1 {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 300;
  letter-spacing: -0.36px;
  line-height: 1.17;
  color: var(--color-ink);
  margin: 0 0 var(--space-base) 0;
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-hairline);
}

.markdown-preview h2 {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 300;
  letter-spacing: -0.32px;
  line-height: 1.13;
  color: var(--color-ink);
  margin: var(--space-xl) 0 var(--space-sm) 0;
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-hairline-soft);
}

.markdown-preview h3 {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 300;
  line-height: 1.2;
  color: var(--color-ink);
  margin: var(--space-lg) 0 var(--space-xs) 0;
}

.markdown-preview h4,
.markdown-preview h5,
.markdown-preview h6 {
  font-family: var(--font-body);
  font-size: 20px;
  font-weight: 500;
  line-height: 1.35;
  color: var(--color-ink);
  margin: var(--space-base) 0 var(--space-xs) 0;
}

.markdown-preview p {
  margin: 0 0 var(--space-sm) 0;
}

.markdown-preview a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: var(--color-hairline-strong);
  text-underline-offset: 2px;
  transition: text-decoration-color var(--duration-fast);
}

.markdown-preview a:hover {
  text-decoration-color: var(--color-primary);
}

.markdown-preview strong {
  font-weight: 500;
  color: var(--color-body-strong);
}

.markdown-preview em {
  font-style: italic;
}

.markdown-preview code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 2px 6px;
  background: var(--color-surface-strong);
  border-radius: var(--rounded-xs);
  color: var(--color-body-strong);
}

.markdown-preview pre {
  background: var(--color-canvas-soft);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-md);
  padding: var(--space-base);
  overflow-x: auto;
  margin: 0 0 var(--space-base) 0;
}

.markdown-preview pre code {
  background: none;
  padding: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-ink);
}

.markdown-preview ul,
.markdown-preview ol {
  margin: 0 0 var(--space-sm) 0;
  padding-left: var(--space-lg);
}

.markdown-preview li {
  margin-bottom: var(--space-xxs);
}

.markdown-preview blockquote {
  border-left: 3px solid var(--color-hairline-strong);
  margin: 0 0 var(--space-sm) 0;
  padding: var(--space-xs) var(--space-base);
  background: var(--color-canvas-soft);
  color: var(--color-muted);
  border-radius: 0 var(--rounded-sm) var(--rounded-sm) 0;
}

.markdown-preview table {
  width: max-content;
  min-width: 100%;
  border-collapse: collapse;
  margin: 0 0 var(--space-base) 0;
  font-size: 14px;
  display: block;
  overflow-x: auto;
}

.markdown-preview th,
.markdown-preview td {
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-hairline);
  text-align: left;
}

.markdown-preview th {
  background: var(--color-surface-strong);
  font-weight: 500;
  color: var(--color-ink);
  font-size: 12px;
  letter-spacing: 0.96px;
  text-transform: uppercase;
}

.markdown-preview tr:nth-child(even) {
  background: var(--color-canvas-soft);
}

.markdown-preview hr {
  border: none;
  border-top: 1px solid var(--color-hairline);
  margin: var(--space-lg) 0;
}

.markdown-preview img {
  max-width: 100%;
  border-radius: var(--rounded-md);
}

/* Empty preview */
.preview-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--color-muted-soft);
  gap: var(--space-xs);
}

.preview-empty__icon {
  font-size: 2rem;
  opacity: 0.5;
}

.preview-empty__text {
  font-size: 15px;
  letter-spacing: 0.15px;
}

/* ============================================
   Action Bar
   ============================================ */
.action-bar {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) 0;
  gap: var(--space-sm);
}

.action-bar.active {
  display: flex;
  animation: fade-in 0.3s var(--ease-out);
}

.action-bar__group {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

/* ============================================
   Buttons — ink pill system
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 10px 20px;
  height: 40px;
  border-radius: var(--rounded-pill);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
  user-select: none;
}

.btn:active {
  transform: scale(0.97);
}

/* Primary — ink pill */
.btn--primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
  border-color: var(--color-primary);
}

.btn--primary:hover {
  background: var(--color-primary-active);
  border-color: var(--color-primary-active);
}

/* Secondary — outline pill */
.btn--secondary {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-hairline-strong);
}

.btn--secondary:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-soft);
}

/* Danger — outline pill, muted red */
.btn--danger {
  background: transparent;
  color: var(--color-error);
  border-color: var(--color-hairline);
}

.btn--danger:hover {
  border-color: var(--color-error);
}

.btn__icon {
  font-size: 15px;
}

/* Copy success state */
.btn--copy-success {
  border-color: var(--color-success) !important;
  color: var(--color-success) !important;
}

/* ============================================
   Stats Bar
   ============================================ */
.stats {
  display: flex;
  gap: var(--space-base);
  font-size: 14px;
  font-weight: 400;
  color: var(--color-muted-soft);
  font-family: var(--font-mono);
}

/* ============================================
   Toast Notification
   ============================================ */
.toast {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--rounded-pill);
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  box-shadow: var(--shadow-hover);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-ink);
  transform: translateY(80px);
  opacity: 0;
  transition: all var(--duration-base) var(--ease-out);
  pointer-events: none;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.toast--success {
  border-color: var(--color-hairline);
}

.toast--error {
  border-color: var(--color-error);
}

.toast__icon {
  font-size: 16px;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  text-align: center;
  padding: var(--space-xxl) var(--space-lg);
  margin-top: var(--space-section);
  font-size: 15px;
  font-weight: 400;
  color: var(--color-muted);
  letter-spacing: 0.15px;
  border-top: 1px solid var(--color-hairline);
}

/* ============================================
   Responsive
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
  .hero__headline {
    font-size: 36px;
    letter-spacing: -0.36px;
  }
}

/* Mobile */
@media (max-width: 640px) {
  .nav {
    padding: 0 var(--space-base);
  }

  .nav__tag {
    display: none;
  }

  .main {
    padding: var(--space-lg) var(--space-base);
  }

  .hero {
    padding: var(--space-xxl) var(--space-base);
  }

  .hero__headline {
    font-size: 32px;
    letter-spacing: -0.32px;
  }

  .hero__subheadline {
    font-size: 15px;
  }

  .dropzone {
    padding: var(--space-xl) var(--space-base);
  }

  .editor-panels {
    grid-template-columns: 1fr;
    height: auto;
    min-height: 400px;
  }

  .editor-panel:first-child {
    border-right: none;
    border-bottom: 1px solid var(--color-hairline);
    max-height: 50vh;
  }

  .action-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .action-bar__group {
    justify-content: center;
  }

  .btn {
    flex: 1;
    justify-content: center;
  }

  .format-badge {
    font-size: 11px;
    padding: 3px 8px;
  }

  .editor-tab {
    padding: 10px var(--space-sm);
    font-size: 14px;
  }

  /* Orbs shrink on mobile */
  .orb--mint { width: 250px; height: 250px; }
  .orb--peach { width: 200px; height: 200px; }
  .orb--lavender { width: 180px; height: 180px; }
}