/* ========================================
   第2部：ニュース収集＋AI解説 — スライドスタイル
   デザインスタイルガイド A案（Sage & Charcoal）準拠
   ======================================== */

/* --- CSS Variables --- */
:root {
  --color-bg: #F8F6F2;
  --color-surface: #FFFFFF;
  --color-text: #2D2D2D;
  --color-text-secondary: #6B7280;
  --color-accent: #7C9A72;
  --color-accent-hover: #5E7E54;
  --color-border: #E5E2DC;
  --color-success: #4A8C5C;
  --color-warning: #D4A04A;
  --color-info: #6B8DB2;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  --font-family: "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Meiryo", "Yu Gothic", sans-serif;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.85;
  letter-spacing: 0.05em;
  overflow: hidden;
  height: 100vh;
  height: 100dvh;
}

/* --- Slide Container --- */
.slide-container {
  position: relative;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

/* --- Navigation --- */
.slide-nav {
  position: fixed;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: 99px;
  padding: 8px 20px;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.nav-btn {
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-btn:hover {
  background: var(--color-bg);
  color: var(--color-accent);
}

.nav-btn:disabled {
  opacity: 0.3;
  cursor: default;
}

.nav-btn:disabled:hover {
  background: transparent;
  color: var(--color-text);
}

.slide-indicator {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  min-width: 60px;
  text-align: center;
  letter-spacing: 0.04em;
}

/* --- Progress Bar --- */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--color-border);
  z-index: 100;
}

.progress-fill {
  height: 100%;
  background: var(--color-accent);
  border-radius: 0 99px 99px 0;
  transition: width 0.5s ease;
  width: 8.33%;
}

/* --- Slides Wrapper --- */
.slides-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
}

/* --- Individual Slide --- */
.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateX(60px);
  transition: opacity 0.45s ease, transform 0.45s ease, visibility 0.45s;
  padding: var(--space-lg);
  padding-bottom: 100px;
}

.slide.active {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

.slide.slide-exit-left {
  opacity: 0;
  visibility: hidden;
  transform: translateX(-60px);
}

.slide-content {
  max-width: 720px;
  width: 100%;
}

/* --- Title Slide --- */
.title-slide {
  text-align: center;
}

.title-slide .subtitle {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.title-slide h1 {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.title-divider {
  width: 48px;
  height: 3px;
  background: var(--color-accent);
  border-radius: 99px;
  margin: var(--space-lg) auto;
}

.title-desc {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.title-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  margin-top: var(--space-2xl);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.meta-separator {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-border);
}

.start-hint {
  margin-top: var(--space-2xl);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  opacity: 0.6;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.8; }
}

/* --- Section Label --- */
.section-label {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-sm);
  padding: 4px 12px;
  background: rgba(124, 154, 114, 0.1);
  border-radius: 99px;
}

/* --- Time Badge --- */
.time-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 99px;
  padding: 4px 12px;
  margin-bottom: var(--space-md);
  margin-left: var(--space-sm);
}

/* --- Headings --- */
h2 {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
}

h3 {
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.03em;
  color: var(--color-text);
}

/* --- Slide Description --- */
.slide-desc {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.85;
  margin-bottom: var(--space-xl);
}

/* --- Info Box --- */
.info-box {
  border-radius: 8px;
  padding: 14px 16px;
  font-size: 0.875rem;
  line-height: 1.7;
  margin: 12px 0;
}

.info-box.tip {
  background: #F0F5EE;
  border-left: 4px solid var(--color-success);
}

.info-box.warning {
  background: #FDF6E8;
  border-left: 4px solid var(--color-warning);
}

.info-box.note {
  background: #EEF2F7;
  border-left: 4px solid var(--color-info);
}

code {
  background: var(--color-bg);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.875rem;
  font-family: "SF Mono", "Consolas", "Menlo", monospace;
  color: var(--color-accent-hover);
}

a {
  color: var(--color-info);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* --- Copy Hint --- */
.copy-hint {
  font-size: 0.8125rem;
  color: var(--color-accent);
  font-weight: 700;
}

/* --- Auth Note --- */
.auth-note {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

/* --- Output Comment --- */
.output-line.output-comment {
  color: #6A9955;
  font-style: italic;
  margin-bottom: 4px;
}

/* --- Steps Overview (Slide 2) --- */
.steps-overview {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.overview-step {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: var(--space-lg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
}

.overview-step.current-step {
  border-color: var(--color-accent);
  background: rgba(124, 154, 114, 0.04);
}

.overview-number {
  flex-shrink: 0;
}

.overview-number span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #FFFFFF;
  font-weight: 700;
  font-size: 1.125rem;
}

.overview-content h3 {
  margin-bottom: 4px;
}

.overview-content p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.overview-time {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  background: var(--color-bg);
  border-radius: 99px;
  padding: 2px 10px;
  margin-top: 6px;
}

/* --- Action Steps (Slide 3, 6, 9) --- */
.action-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.action-step {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 14px var(--space-lg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
}

.action-step.highlight-step {
  border-color: var(--color-warning);
  background: rgba(212, 160, 74, 0.04);
}

.action-number {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #FFFFFF;
  font-weight: 700;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.action-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.action-text strong {
  font-size: 0.9375rem;
}

.action-text span {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.action-steps.compact .action-step {
  padding: 10px var(--space-lg);
}

/* --- Operation Cards (Slide 4) --- */
.operation-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.operation-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: var(--space-lg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
}

.operation-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: rgba(124, 154, 114, 0.08);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.operation-detail h3 {
  margin-bottom: 4px;
}

.operation-detail p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.operation-hint {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  background: var(--color-bg);
  padding: 4px 10px;
  border-radius: 6px;
  margin-top: 6px;
  display: inline-block;
}

/* --- Demo Box (Slide 5, 8) --- */
.demo-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
}

.demo-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 12px var(--space-lg);
  background: rgba(124, 154, 114, 0.08);
  border-bottom: 1px solid var(--color-border);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-accent);
}

.demo-body {
  padding: var(--space-lg);
}

.demo-body > p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.demo-note {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-md);
  line-height: 1.7;
}

/* --- Prompt Card (Slide 5, 6, 9) --- */
.prompt-card {
  background: #F9FAFB;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: var(--space-md);
}

.prompt-label {
  padding: 8px 16px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-accent);
  background: rgba(124, 154, 114, 0.06);
  border-bottom: 1px solid var(--color-border);
  letter-spacing: 0.04em;
}

.prompt-text {
  padding: 16px;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--color-text);
}

.prompt-card.copyable {
  border-color: var(--color-accent);
}

/* --- Copy Button --- */
.copy-btn {
  float: right;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 0.6875rem;
  font-weight: 700;
  font-family: var(--font-family);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  line-height: 1;
}

.copy-btn:hover {
  background: var(--color-bg);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.copy-btn.copied {
  background: rgba(74, 140, 92, 0.08);
  color: var(--color-success);
  border-color: var(--color-success);
}

.copy-btn-text {
  pointer-events: none;
}

/* --- Plain Box --- */
.plain-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: var(--space-lg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
}

/* --- Conversation Flow (Slide 8) --- */
.conversation-flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  margin-bottom: var(--space-md);
}

.conversation-bubble {
  width: 100%;
  max-width: 400px;
  padding: 14px var(--space-lg);
  border-radius: 12px;
  font-size: 0.9375rem;
}

.conversation-bubble p {
  line-height: 1.7;
}

.bubble-label {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.user-bubble {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
}

.user-bubble .bubble-label {
  color: var(--color-text-secondary);
}

.ai-bubble {
  background: rgba(124, 154, 114, 0.08);
  border: 1px solid rgba(124, 154, 114, 0.2);
}

.ai-bubble .bubble-label {
  color: var(--color-accent);
}

.conversation-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px 0;
}

/* --- Expected Output (Slide 7, 10) --- */
.expected-output {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: var(--space-lg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
}

.output-header {
  padding: 10px 16px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-success);
  background: rgba(74, 140, 92, 0.06);
  border-bottom: 1px solid var(--color-border);
}

.output-body {
  padding: 16px;
  background: #1E1E1E;
  font-family: "SF Mono", "Consolas", "Menlo", monospace;
  font-size: 0.8125rem;
  line-height: 1.8;
}

.output-line {
  color: #D4D4D4;
}

.output-line.output-detail {
  color: #9CDCFE;
  padding-left: 16px;
}

.output-line.output-more {
  color: #6A6A6A;
}

.output-line.output-spacer {
  height: 8px;
}

/* --- Trouble Section (Slide 7, 10) --- */
.trouble-section {
  margin-bottom: var(--space-md);
}

.trouble-section h3 {
  font-size: 0.9375rem;
  margin-bottom: var(--space-sm);
}

.trouble-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.trouble-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 12px 16px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.trouble-q {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-warning);
  margin-bottom: 2px;
}

.trouble-a {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- Achievement Card (Slide 11) --- */
.achievement-card {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: var(--space-lg) var(--space-xl);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  margin-bottom: var(--space-xl);
}

.achievement-icon {
  flex-shrink: 0;
}

.achievement-text p {
  font-size: 1.125rem;
  line-height: 1.7;
}

.achievement-sub {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

/* --- Next Preview (Slide 11) --- */
.next-preview {
  background: rgba(124, 154, 114, 0.06);
  border: 1px solid rgba(124, 154, 114, 0.2);
  border-radius: 16px;
  padding: var(--space-lg);
}

.next-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-md);
}

.next-content {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.next-icon {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  background: var(--color-surface);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.next-text strong {
  font-size: 1rem;
  display: block;
  margin-bottom: 4px;
}

.next-text p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- Home Link（もくじに戻る） --- */
.home-link {
  position: fixed;
  top: var(--space-md);
  left: var(--space-md);
  z-index: 200;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  text-decoration: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: background 0.2s ease, color 0.2s ease;
}

.home-link:hover {
  color: var(--color-accent);
  background: var(--color-surface);
}

/* --- Timer --- */
.timer-area {
  position: fixed;
  top: var(--space-md);
  right: var(--space-md);
  z-index: 200;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.timer-toggle {
  width: 40px;
  height: 40px;
  border: none;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--color-border);
  transition: background 0.2s ease, color 0.2s ease;
}

.timer-toggle:hover {
  color: var(--color-accent);
  background: var(--color-surface);
}

.timer-display {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: 99px;
  padding: 6px 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.timer-time {
  font-family: "SF Mono", "Consolas", "Menlo", monospace;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.04em;
  min-width: 56px;
  text-align: center;
}

.timer-display.timer-warning .timer-time {
  color: var(--color-warning);
}

.timer-display.timer-finished .timer-time {
  color: #C0392B;
  animation: timer-blink 0.8s ease-in-out infinite;
}

@keyframes timer-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.timer-reset-btn {
  width: 24px;
  height: 24px;
  border: none;
  background: transparent;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  transition: background 0.2s ease, color 0.2s ease;
}

.timer-reset-btn:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

.timer-popover {
  position: absolute;
  top: 48px;
  right: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: var(--space-lg);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
  min-width: 200px;
}

.timer-popover-title {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  letter-spacing: 0.04em;
}

.timer-presets {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.timer-preset {
  padding: 8px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg);
  font-family: var(--font-family);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.timer-preset:hover {
  border-color: var(--color-accent);
  background: rgba(124, 154, 114, 0.06);
}

.timer-preset.selected {
  border-color: var(--color-accent);
  background: rgba(124, 154, 114, 0.1);
  color: var(--color-accent);
}

.timer-custom {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.timer-input {
  width: 64px;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  text-align: center;
  background: var(--color-bg);
}

.timer-input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.timer-unit {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.timer-start-btn {
  width: 100%;
  padding: 10px;
  border: none;
  border-radius: 8px;
  background: var(--color-accent);
  color: #FFFFFF;
  font-family: var(--font-family);
  font-size: 0.9375rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease;
}

.timer-start-btn:hover {
  background: var(--color-accent-hover);
}

.hidden {
  display: none !important;
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 480px) {
  .title-slide h1 {
    font-size: 1.625rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  .slide {
    padding: var(--space-md);
    padding-bottom: 100px;
  }

  .slide-nav {
    bottom: var(--space-md);
    padding: 6px 16px;
  }

  .title-meta {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .meta-separator {
    display: none;
  }

  .operation-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-md);
  }

  .achievement-card {
    flex-direction: column;
    text-align: center;
    padding: var(--space-lg);
  }

  .next-content {
    flex-direction: column;
    text-align: center;
  }

  .overview-step {
    padding: var(--space-md);
  }

  .overview-number span {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }

  .prompt-text {
    font-size: 0.8125rem;
  }
}

@media (min-width: 768px) {
  .slide {
    padding: var(--space-xl);
    padding-bottom: 100px;
  }
}