/* ======================================================
   Write Onlyx — Design System & Styles
   ====================================================== */

/* --- Design Tokens --- */
:root {
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-content: 'Lora', 'Georgia', 'Times New Roman', serif;

  --color-bg: #F8F7F4;
  --color-surface: #FFFFFF;
  --color-text: #1C1C1C;
  --color-text-secondary: #5F5F5F;
  --color-text-tertiary: #9A9A9A;
  --color-text-muted: #B8B8B8;
  --color-accent: #1C1C1C;
  --color-accent-hover: #3A3A3A;
  --color-border: #E5E3DF;
  --color-border-light: #EDEBE7;
  --color-success: #2D8A4E;
  --color-success-bg: #E8F5EE;
  --color-warning: #C4841D;
  --color-warning-bg: #FFF8ED;
  --color-error: #C53030;
  --color-error-bg: #FEF0F0;
  --color-overlay: rgba(28, 28, 28, 0.4);

  --max-width: 720px;
  --max-width-wide: 960px;
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.08);
  --transition: 180ms ease;
  --transition-slow: 350ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-ui);
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity var(--transition);
}
a:hover {
  opacity: 0.7;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: var(--font-ui);
  cursor: pointer;
  border: none;
  background: none;
  font-size: inherit;
}

input, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

/* --- Utility --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.container-wide {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 24px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
}

/* --- Page Transitions --- */
.page-enter {
  opacity: 0;
  transform: translateY(8px);
}
.page-active {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 300ms ease, transform 300ms ease;
}

/* ======================================================
   HOME PAGE
   ====================================================== */
.home {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
  padding: 40px 24px;
}

.home__brand {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: 48px;
}

.home__title {
  font-family: var(--font-content);
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 400;
  line-height: 1.15;
  color: var(--color-text);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.home__subtitle {
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-text-secondary);
  max-width: 420px;
  margin-bottom: 48px;
}

.home__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  background: var(--color-accent);
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius);
  transition: background var(--transition), transform var(--transition);
  letter-spacing: 0.01em;
}
.home__cta:hover {
  background: var(--color-accent-hover);
  opacity: 1;
  transform: translateY(-1px);
}
.home__cta:active {
  transform: translateY(0);
}

.home__note {
  margin-top: 24px;
  font-size: 13px;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.home__footer {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  color: var(--color-text-muted);
}

/* ======================================================
   HEADER / NAV
   ====================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 247, 244, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 24px;
}

.header__logo {
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
}
.header__logo:hover {
  opacity: 0.7;
}

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

/* ======================================================
   BUTTONS
   ====================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-accent-hover);
  opacity: 1;
}

.btn--secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn--secondary:hover {
  background: var(--color-border-light);
  opacity: 1;
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-secondary);
}
.btn--ghost:hover {
  color: var(--color-text);
  opacity: 1;
}

.btn--success {
  background: var(--color-success);
  color: #fff;
}
.btn--success:hover {
  opacity: 0.9;
}

.btn--small {
  padding: 6px 12px;
  font-size: 12px;
}

.btn--large {
  padding: 12px 28px;
  font-size: 15px;
}

/* ======================================================
   EDITOR
   ====================================================== */
.editor-page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.editor-page .header {
  border-bottom-color: var(--color-border-light);
}

/* Toolbar */
.toolbar {
  position: sticky;
  top: 56px;
  z-index: 90;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border-light);
  padding: 0;
}

.toolbar__inner {
  display: flex;
  align-items: center;
  gap: 2px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 6px 24px;
  flex-wrap: wrap;
}

.toolbar__sep {
  width: 1px;
  height: 20px;
  background: var(--color-border);
  margin: 0 6px;
  flex-shrink: 0;
}

.toolbar__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: 14px;
  font-weight: 600;
  transition: all var(--transition);
  position: relative;
}
.toolbar__btn:hover {
  background: var(--color-border-light);
  color: var(--color-text);
}
.toolbar__btn.active {
  background: var(--color-accent);
  color: #fff;
}
.toolbar__btn svg {
  width: 16px;
  height: 16px;
}

.toolbar__select {
  padding: 4px 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  cursor: pointer;
  outline: none;
}
.toolbar__select:hover {
  border-color: var(--color-text-tertiary);
}

/* Editor Body */
.editor-body {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 120px;
  width: 100%;
}

.editor-title {
  font-family: var(--font-content);
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-text);
  width: 100%;
  border: none;
  outline: none;
  background: none;
  resize: none;
  padding: 0;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.editor-title::placeholder {
  color: var(--color-text-muted);
}

.editor-author {
  font-family: var(--font-ui);
  font-size: 15px;
  color: var(--color-text-secondary);
  width: 100%;
  border: none;
  outline: none;
  background: none;
  padding: 0;
  margin-bottom: 32px;
}
.editor-author::placeholder {
  color: var(--color-text-muted);
}

/* Content Editable */
.editor-content {
  font-family: var(--font-content);
  font-size: 18px;
  line-height: 1.8;
  color: var(--color-text);
  min-height: 400px;
  outline: none;
  word-wrap: break-word;
  overflow-wrap: break-word;
}
.editor-content:empty::before {
  content: attr(data-placeholder);
  color: var(--color-text-muted);
  pointer-events: none;
}

.editor-content p {
  margin-bottom: 1em;
}
.editor-content h2 {
  font-family: var(--font-ui);
  font-size: 24px;
  font-weight: 600;
  margin: 1.5em 0 0.5em;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.editor-content h3 {
  font-family: var(--font-ui);
  font-size: 20px;
  font-weight: 600;
  margin: 1.3em 0 0.4em;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.editor-content strong { font-weight: 700; }
.editor-content em { font-style: italic; }
.editor-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.editor-content blockquote {
  border-left: 3px solid var(--color-border);
  padding-left: 20px;
  margin: 1.2em 0;
  color: var(--color-text-secondary);
  font-style: italic;
}
.editor-content ul, .editor-content ol {
  padding-left: 24px;
  margin: 1em 0;
}
.editor-content li {
  margin-bottom: 0.4em;
}
.editor-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin: 1.5em 0;
  box-shadow: var(--shadow);
  display: block;
}
.editor-content figure {
  margin: 1.5em 0;
  padding: 0;
}
.editor-content figure img {
  margin: 0;
}
.editor-content hr {
  border: none;
  height: 1px;
  background: var(--color-border);
  margin: 2em 0;
}
.editor-content .text-small { font-size: 0.85em; }
.editor-content .text-normal { font-size: 1em; }
.editor-content .text-large { font-size: 1.25em; }

/* Sections Panel */
.sections-panel {
  position: fixed;
  left: 0;
  top: 56px;
  bottom: 0;
  width: 280px;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border-light);
  z-index: 80;
  transform: translateX(-100%);
  transition: transform var(--transition-slow);
  overflow-y: auto;
  padding: 20px 16px;
}
.sections-panel.open {
  transform: translateX(0);
}

.sections-panel__title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: 16px;
}

.section-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition);
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}
.section-item:hover {
  background: var(--color-border-light);
}
.section-item.active {
  background: var(--color-accent);
  color: #fff;
}

.section-item__num {
  font-size: 11px;
  font-weight: 600;
  opacity: 0.5;
  min-width: 18px;
}

.section-item__title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.section-item__delete {
  opacity: 0;
  padding: 2px;
  color: inherit;
  transition: opacity var(--transition);
}
.section-item:hover .section-item__delete {
  opacity: 0.5;
}
.section-item__delete:hover {
  opacity: 1 !important;
}

.sections-panel__add {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 12px;
  width: 100%;
  font-size: 13px;
  color: var(--color-text-tertiary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  margin-top: 8px;
}
.sections-panel__add:hover {
  background: var(--color-border-light);
  color: var(--color-text-secondary);
}

/* Section Title Input (in editor body) */
.section-title-input {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  width: 100%;
  border: none;
  outline: none;
  background: none;
  padding: 0;
  margin-bottom: 24px;
}
.section-title-input::placeholder {
  color: var(--color-text-muted);
}

/* ======================================================
   PUBLISH RESULT
   ====================================================== */
.publish-result {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 40px 24px;
  text-align: center;
}

.publish-result__check {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-success-bg);
  color: var(--color-success);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 24px;
}

.publish-result__title {
  font-family: var(--font-content);
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 8px;
}

.publish-result__subtitle {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 40px;
}

.publish-result__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  max-width: 480px;
  width: 100%;
  text-align: left;
  box-shadow: var(--shadow);
}

.publish-result__field {
  margin-bottom: 20px;
}
.publish-result__field:last-child {
  margin-bottom: 0;
}

.publish-result__label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: 8px;
}

.publish-result__value {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
  word-break: break-all;
}

.publish-result__value-text {
  flex: 1;
  min-width: 0;
  word-break: break-all;
}

.publish-result__copy {
  flex-shrink: 0;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.publish-result__copy:hover {
  background: var(--color-border-light);
}

.publish-result__warning {
  display: flex;
  gap: 10px;
  padding: 14px 16px;
  background: var(--color-warning-bg);
  border-radius: var(--radius);
  margin-top: 20px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-warning);
  text-align: left;
}

.publish-result__warning-icon {
  flex-shrink: 0;
  font-size: 16px;
}

.publish-result__actions {
  display: flex;
  gap: 12px;
  margin-top: 32px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ======================================================
   ARTICLE READER
   ====================================================== */
.article-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.article-header {
  padding: 64px 24px 40px;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.article-header__title {
  font-family: var(--font-content);
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 600;
  line-height: 1.15;
  color: var(--color-text);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.article-header__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-size: 14px;
  color: var(--color-text-tertiary);
}

.article-header__meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.article-body {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 80px;
  width: 100%;
}

.article-body .article-content {
  font-family: var(--font-content);
  font-size: 18px;
  line-height: 1.8;
  color: var(--color-text);
}

.article-content p {
  margin-bottom: 1.2em;
}
.article-content h2 {
  font-family: var(--font-ui);
  font-size: 24px;
  font-weight: 600;
  margin: 2em 0 0.6em;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.article-content h3 {
  font-family: var(--font-ui);
  font-size: 20px;
  font-weight: 600;
  margin: 1.5em 0 0.5em;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.article-content strong { font-weight: 700; }
.article-content em { font-style: italic; }
.article-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--color-border);
  transition: text-decoration-color var(--transition);
}
.article-content a:hover {
  text-decoration-color: var(--color-accent);
  opacity: 1;
}
.article-content blockquote {
  border-left: 3px solid var(--color-border);
  padding-left: 20px;
  margin: 1.5em 0;
  color: var(--color-text-secondary);
  font-style: italic;
}
.article-content ul, .article-content ol {
  padding-left: 28px;
  margin: 1em 0;
}
.article-content li {
  margin-bottom: 0.5em;
}
.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin: 2em 0;
  box-shadow: var(--shadow-sm);
  display: block;
}
.article-content figure {
  margin: 2em 0;
  padding: 0;
}
.article-content figure img {
  margin: 0;
}
.article-content hr {
  border: none;
  height: 1px;
  background: var(--color-border);
  margin: 2.5em 0;
}
.article-content .text-small { font-size: 0.85em; }
.article-content .text-normal { font-size: 1em; }
.article-content .text-large { font-size: 1.25em; }

/* Section Separator */
.article-section-sep {
  text-align: center;
  padding: 32px 0;
  color: var(--color-text-muted);
  font-size: 18px;
  letter-spacing: 0.3em;
}

.article-section-title {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border-light);
}

/* Section Nav (hamburger) */
.section-nav-toggle {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  z-index: 200;
  transition: transform var(--transition);
  cursor: pointer;
}
.section-nav-toggle:hover {
  transform: scale(1.05);
}
.section-nav-toggle svg {
  width: 20px;
  height: 20px;
}

.section-nav-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-overlay);
  z-index: 199;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-slow);
}
.section-nav-overlay.open {
  opacity: 1;
  visibility: visible;
}

.section-nav {
  position: fixed;
  right: 0;
  top: 0;
  bottom: 0;
  width: 300px;
  max-width: 85vw;
  background: var(--color-surface);
  z-index: 201;
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  padding: 24px;
  overflow-y: auto;
}
.section-nav.open {
  transform: translateX(0);
}

.section-nav__title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: 20px;
}

.section-nav__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px;
  color: var(--color-text-secondary);
  transition: all var(--transition);
  margin-bottom: 4px;
}
.section-nav__item:hover {
  background: var(--color-border-light);
}
.section-nav__item.active {
  background: var(--color-accent);
  color: #fff;
}
.section-nav__item-num {
  font-size: 11px;
  font-weight: 600;
  opacity: 0.5;
}

/* Article Footer */
.article-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 24px;
  border-top: 1px solid var(--color-border-light);
  text-align: center;
  width: 100%;
}

.article-footer__edit {
  font-size: 14px;
  color: var(--color-text-tertiary);
  cursor: pointer;
  transition: color var(--transition);
}
.article-footer__edit:hover {
  color: var(--color-text-secondary);
}

/* ======================================================
   EDIT KEY MODAL
   ====================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-overlay);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}
.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  transform: translateY(10px);
  transition: transform var(--transition);
}
.modal-overlay.open .modal {
  transform: translateY(0);
}

.modal__title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.modal__desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  line-height: 1.5;
}

.modal__input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
  margin-bottom: 8px;
  transition: border-color var(--transition);
  background: var(--color-surface);
  color: var(--color-text);
}
.modal__input:focus {
  border-color: var(--color-accent);
  outline: none;
}

.modal__error {
  font-size: 13px;
  color: var(--color-error);
  margin-bottom: 16px;
  min-height: 20px;
}

.modal__actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

/* ======================================================
   LOADING
   ====================================================== */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.loading__spinner {
  width: 32px;
  height: 32px;
  border: 2px solid var(--color-border-light);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* ======================================================
   404
   ====================================================== */
.not-found {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
  padding: 40px 24px;
}

.not-found__code {
  font-size: 72px;
  font-weight: 700;
  color: var(--color-border);
  line-height: 1;
  margin-bottom: 16px;
}

.not-found__text {
  font-size: 17px;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

/* ======================================================
   TOAST
   ====================================================== */
.toast-container {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 400;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: var(--color-text);
  color: #fff;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(10px);
  animation: toast-in 300ms ease forwards;
  pointer-events: auto;
}

.toast.toast-out {
  animation: toast-out 200ms ease forwards;
}

@keyframes toast-in {
  to { opacity: 1; transform: translateY(0); }
}
@keyframes toast-out {
  to { opacity: 0; transform: translateY(-10px); }
}

/* ======================================================
   RESPONSIVE
   ====================================================== */
@media (max-width: 768px) {
  .toolbar__inner {
    padding: 4px 16px;
    gap: 1px;
  }
  .toolbar__btn {
    width: 30px;
    height: 30px;
  }
  .toolbar__sep {
    margin: 0 3px;
  }
  .editor-body {
    padding: 32px 16px 100px;
  }
  .article-header {
    padding: 40px 20px 24px;
  }
  .article-body {
    padding: 0 20px 60px;
  }
  .article-body .article-content {
    font-size: 17px;
  }
  .section-nav {
    width: 260px;
  }
  .publish-result__card {
    padding: 20px;
  }
  .container, .container-wide {
    padding: 0 16px;
  }
}

@media (max-width: 480px) {
  .toolbar__inner {
    padding: 4px 12px;
  }
  .toolbar__btn {
    width: 28px;
    height: 28px;
    font-size: 12px;
  }
  .editor-title {
    font-size: 26px;
  }
  .editor-content {
    font-size: 16px;
  }
  .home__title {
    font-size: 32px;
  }
  .article-header__title {
    font-size: 28px;
  }
  .article-body .article-content {
    font-size: 16px;
    line-height: 1.75;
  }
  .header__inner {
    padding: 0 16px;
  }
}

/* Image upload button (file input hidden) */
.image-upload-input {
  display: none;
}