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

:root {
  --green-50: #f0fdf4;
  --green-100: #dcfce7;
  --green-200: #bbf7d0;
  --green-300: #86efac;
  --green-400: #4ade80;
  --green-500: #22c55e;
  --green-600: #16a34a;
  --green-700: #15803d;
  --green-800: #166534;
  --green-900: #14532d;
  --purple-500: #a855f7;
  --purple-600: #9333ea;
  --yellow-400: #facc15;
  --yellow-500: #eab308;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,.1), 0 8px 10px -6px rgba(0,0,0,.1);
  --max-w: 1200px;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--gray-800);
  line-height: 1.6;
  background: #fff;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--green-600); text-decoration: none; }
a:hover { color: var(--green-700); }

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

/* ===== Nav ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
}
.nav .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav-logo {
  font-size: 1.25rem; font-weight: 700; color: var(--green-700);
  display: flex; align-items: center; gap: 8px;
}
.nav-logo span { font-size: 1.5rem; }
.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a { color: var(--gray-600); font-weight: 500; font-size: .95rem; transition: color .2s; }
.nav-links a:hover { color: var(--green-600); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--green-600); color: #fff; font-weight: 600;
  padding: 8px 20px; border-radius: 999px; font-size: .9rem;
  transition: background .2s;
}
.nav-cta:hover { background: var(--green-700); color: #fff; }

.nav-hamburger { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-hamburger svg { width: 28px; height: 28px; color: var(--gray-700); }

/* ===== Hero ===== */
.hero {
  padding: 80px 0 60px;
  background: linear-gradient(135deg, var(--green-50) 0%, #fff 50%, #faf5ff 100%);
}
.hero .container {
  display: flex; align-items: center; gap: 60px;
}
.hero-text { flex: 1; }
.hero-badge {
  display: inline-block; background: var(--green-100); color: var(--green-700);
  font-size: .85rem; font-weight: 600; padding: 4px 14px; border-radius: 999px;
  margin-bottom: 16px;
}
.hero h1 {
  font-size: 3rem; font-weight: 800; line-height: 1.15;
  color: var(--gray-900); margin-bottom: 20px;
}
.hero h1 .accent { color: var(--green-600); }
.hero p {
  font-size: 1.2rem; color: var(--gray-600); margin-bottom: 32px;
  max-width: 540px;
}
.hero-actions { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }

.hero-visual { flex: 0 0 420px; position: relative; }
.hero-mockup {
  width: 100%; border-radius: var(--radius-lg);
  background: var(--green-100); aspect-ratio: 9/16;
  display: flex; align-items: center; justify-content: center;
  font-size: 6rem; box-shadow: var(--shadow-xl);
  max-width: 280px; margin: 0 auto;
  overflow: hidden;
}
.hero-mockup img { width: 100%; height: 100%; object-fit: cover; }
.hero-stars {
  position: absolute; top: -12px; right: 20px;
  background: #fff; padding: 8px 16px; border-radius: var(--radius);
  box-shadow: var(--shadow-lg); font-size: .9rem; font-weight: 600;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600; font-size: 1rem; padding: 14px 28px;
  border-radius: 999px; transition: all .2s; border: none; cursor: pointer;
}
.btn-primary { background: var(--green-600); color: #fff; }
.btn-primary:hover { background: var(--green-700); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-lg); }
.btn-secondary { background: var(--gray-100); color: var(--gray-700); }
.btn-secondary:hover { background: var(--gray-200); color: var(--gray-800); }
.btn-outline { background: transparent; color: var(--green-600); border: 2px solid var(--green-600); }
.btn-outline:hover { background: var(--green-50); }
.btn-sm { padding: 10px 20px; font-size: .9rem; }

.store-badge { height: 48px; width: auto; transition: transform .2s; }
.store-badge:hover { transform: scale(1.05); }

/* ===== Sections ===== */
section { padding: 80px 0; }
section:nth-child(even) { background: var(--gray-50); }

.section-label {
  display: inline-block; font-size: .85rem; font-weight: 700;
  color: var(--green-600); text-transform: uppercase; letter-spacing: .05em;
  margin-bottom: 8px;
}
.section-title {
  font-size: 2.25rem; font-weight: 800; color: var(--gray-900);
  margin-bottom: 16px; line-height: 1.2;
}
.section-subtitle {
  font-size: 1.1rem; color: var(--gray-500); max-width: 640px;
  margin-bottom: 48px;
}
.section-header-center { text-align: center; }
.section-header-center .section-subtitle { margin-left: auto; margin-right: auto; }

/* ===== Features Grid ===== */
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.feature-card {
  background: #fff; border-radius: var(--radius-lg); padding: 32px;
  border: 1px solid var(--gray-200); transition: all .3s;
}
.feature-card:hover { border-color: var(--green-300); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.feature-icon {
  width: 56px; height: 56px; border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; margin-bottom: 20px;
}
.feature-icon.green { background: var(--green-100); }
.feature-icon.purple { background: #f3e8ff; }
.feature-icon.yellow { background: #fef9c3; }
.feature-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; }
.feature-card p { color: var(--gray-500); font-size: .95rem; }

/* ===== How It Works ===== */
.steps {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px; counter-reset: step;
}
.step {
  text-align: center; padding: 24px; position: relative;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  display: flex; width: 48px; height: 48px;
  align-items: center; justify-content: center;
  background: var(--green-600); color: #fff;
  font-weight: 800; font-size: 1.2rem;
  border-radius: 50%; margin: 0 auto 16px;
}
.step h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.step p { font-size: .9rem; color: var(--gray-500); }

/* ===== Grade Cards ===== */
.grade-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.grade-card {
  background: #fff; border-radius: var(--radius-lg); padding: 28px;
  border: 1px solid var(--gray-200); transition: all .3s;
  display: block; color: inherit;
}
.grade-card:hover { border-color: var(--green-400); box-shadow: var(--shadow-lg); transform: translateY(-3px); color: inherit; }
.grade-card-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.grade-card-level {
  width: 44px; height: 44px; border-radius: 10px;
  background: var(--green-100); color: var(--green-700);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 1.1rem;
}
.grade-card h3 { font-size: 1.1rem; font-weight: 700; }
.grade-card p { color: var(--gray-500); font-size: .9rem; margin-bottom: 12px; }
.grade-card .sample-words {
  display: flex; flex-wrap: wrap; gap: 6px;
}
.grade-card .word-chip {
  background: var(--green-50); color: var(--green-700);
  font-size: .8rem; font-weight: 600; padding: 4px 10px;
  border-radius: 6px;
}

/* ===== Monster Showcase ===== */
.monster-section { background: linear-gradient(135deg, var(--green-800) 0%, #1e1b4b 100%); color: #fff; }
.monster-section .section-label { color: var(--green-300); }
.monster-section .section-title { color: #fff; }
.monster-section .section-subtitle { color: rgba(255,255,255,.7); }
.monster-rarity-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.rarity-card {
  background: rgba(255,255,255,.08); border-radius: var(--radius);
  padding: 24px; text-align: center; border: 1px solid rgba(255,255,255,.1);
  transition: all .3s;
}
.rarity-card:hover { background: rgba(255,255,255,.14); transform: translateY(-3px); }
.rarity-stars { font-size: 1.2rem; margin-bottom: 8px; color: var(--yellow-400); }
.rarity-label { font-weight: 700; font-size: .95rem; margin-bottom: 4px; }
.rarity-desc { font-size: .8rem; color: rgba(255,255,255,.6); }

/* ===== Testimonials ===== */
.testimonial-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.testimonial-card {
  background: #fff; border-radius: var(--radius-lg); padding: 28px;
  border: 1px solid var(--gray-200);
}
.testimonial-stars { color: var(--yellow-500); font-size: 1rem; margin-bottom: 12px; }
.testimonial-text { font-size: .95rem; color: var(--gray-600); margin-bottom: 16px; font-style: italic; }
.testimonial-author { font-weight: 600; font-size: .9rem; color: var(--gray-800); }

/* ===== CTA Banner ===== */
.cta-banner {
  background: linear-gradient(135deg, var(--green-600) 0%, var(--green-700) 100%);
  color: #fff; text-align: center; padding: 64px 24px; border-radius: var(--radius-lg);
  margin: 0 24px;
}
.cta-banner h2 { font-size: 2rem; font-weight: 800; margin-bottom: 12px; }
.cta-banner p { font-size: 1.1rem; opacity: .9; margin-bottom: 28px; max-width: 500px; margin-left: auto; margin-right: auto; }
.cta-banner .btn-primary { background: #fff; color: var(--green-700); }
.cta-banner .btn-primary:hover { background: var(--green-50); }

/* ===== FAQ ===== */
.faq-list { max-width: 760px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--gray-200); padding: 20px 0;
}
.faq-question {
  width: 100%; background: none; border: none; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 1.05rem; font-weight: 600; color: var(--gray-800);
  text-align: left; padding: 0;
}
.faq-question::after { content: '+'; font-size: 1.4rem; color: var(--gray-400); transition: transform .2s; }
.faq-item.open .faq-question::after { content: '-'; }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height .3s ease;
  color: var(--gray-500); font-size: .95rem; line-height: 1.7;
}
.faq-item.open .faq-answer { max-height: 500px; padding-top: 12px; }

/* ===== Footer ===== */
.footer {
  background: var(--gray-900); color: rgba(255,255,255,.7);
  padding: 48px 0 32px;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px; margin-bottom: 40px;
}
.footer-brand p { font-size: .9rem; margin-top: 8px; line-height: 1.6; max-width: 300px; }
.footer h4 { color: #fff; font-size: .9rem; font-weight: 700; margin-bottom: 16px; text-transform: uppercase; letter-spacing: .05em; }
.footer ul { list-style: none; }
.footer li { margin-bottom: 10px; }
.footer a { color: rgba(255,255,255,.6); font-size: .9rem; }
.footer a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 24px; text-align: center; font-size: .85rem;
}

/* ===== Content / Article Pages ===== */
.article-hero {
  padding: 60px 0 40px;
  background: linear-gradient(135deg, var(--green-50) 0%, #fff 100%);
}
.article-hero h1 { font-size: 2.5rem; font-weight: 800; margin-bottom: 16px; }
.article-hero p { font-size: 1.15rem; color: var(--gray-500); max-width: 680px; }
.breadcrumb { font-size: .85rem; color: var(--gray-400); margin-bottom: 16px; }
.breadcrumb a { color: var(--gray-500); }

.article-body {
  max-width: 780px; margin: 0 auto; padding: 48px 24px 80px;
}
.article-body h2 {
  font-size: 1.6rem; font-weight: 700; margin: 40px 0 16px;
  color: var(--gray-900);
}
.article-body h3 {
  font-size: 1.2rem; font-weight: 700; margin: 32px 0 12px;
  color: var(--gray-800);
}
.article-body p { margin-bottom: 16px; color: var(--gray-600); }
.article-body ul, .article-body ol {
  margin: 0 0 16px 24px; color: var(--gray-600);
}
.article-body li { margin-bottom: 8px; }

.internal-links {
  background: var(--green-50); border-radius: var(--radius);
  padding: 24px; margin: 32px 0;
}
.internal-links h3 { font-size: 1rem; margin-bottom: 12px; color: var(--green-800); }
.internal-links ul { list-style: none; margin: 0; padding: 0; }
.internal-links li { margin-bottom: 8px; }
.internal-links a { font-weight: 600; font-size: .95rem; }

.article-cta {
  background: var(--green-50); border: 2px solid var(--green-200);
  border-radius: var(--radius-lg); padding: 32px; text-align: center;
  margin: 40px 0;
}
.article-cta h3 { font-size: 1.3rem; margin-bottom: 8px; }
.article-cta p { color: var(--gray-500); margin-bottom: 20px; }

/* ===== Tool Page ===== */
.tool-hero {
  padding: 60px 0 40px;
  background: linear-gradient(135deg, var(--green-50) 0%, #faf5ff 100%);
}
.tool-area {
  max-width: 680px; margin: 0 auto; padding: 48px 24px 80px;
}
.spelling-tool {
  background: #fff; border-radius: var(--radius-lg);
  border: 2px solid var(--gray-200); padding: 40px;
  box-shadow: var(--shadow-lg);
}
.tool-grade-select {
  display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px;
}
.tool-grade-btn {
  padding: 8px 16px; border-radius: 999px;
  border: 2px solid var(--gray-200); background: #fff;
  font-weight: 600; font-size: .9rem; cursor: pointer;
  transition: all .2s; color: var(--gray-600);
}
.tool-grade-btn:hover { border-color: var(--green-400); }
.tool-grade-btn.active { background: var(--green-600); color: #fff; border-color: var(--green-600); }
.tool-word-display {
  text-align: center; padding: 32px 0; margin-bottom: 24px;
}
.tool-word-num { font-size: .9rem; color: var(--gray-400); margin-bottom: 8px; }
.tool-prompt { font-size: 1.1rem; color: var(--gray-500); margin-bottom: 4px; }
.tool-play-btn {
  background: var(--green-600); color: #fff; border: none;
  width: 64px; height: 64px; border-radius: 50%;
  font-size: 1.6rem; cursor: pointer; margin: 16px auto;
  display: flex; align-items: center; justify-content: center;
  transition: all .2s; box-shadow: var(--shadow);
}
.tool-play-btn:hover { background: var(--green-700); transform: scale(1.08); }
.tool-input-row { display: flex; gap: 12px; margin-bottom: 16px; }
.tool-input {
  flex: 1; padding: 14px 18px; border-radius: var(--radius);
  border: 2px solid var(--gray-200); font-size: 1.1rem;
  outline: none; transition: border .2s;
}
.tool-input:focus { border-color: var(--green-400); }
.tool-input.correct { border-color: var(--green-500); background: var(--green-50); }
.tool-input.incorrect { border-color: #ef4444; background: #fef2f2; }
.tool-submit {
  padding: 14px 28px; border-radius: var(--radius);
  background: var(--green-600); color: #fff; border: none;
  font-weight: 700; font-size: 1rem; cursor: pointer;
  transition: background .2s;
}
.tool-submit:hover { background: var(--green-700); }
.tool-result {
  text-align: center; padding: 16px; border-radius: var(--radius);
  font-weight: 600; margin-top: 16px; display: none;
}
.tool-result.show { display: block; }
.tool-result.correct { background: var(--green-50); color: var(--green-700); }
.tool-result.incorrect { background: #fef2f2; color: #dc2626; }
.tool-score {
  text-align: center; padding: 20px; margin-top: 24px;
  background: var(--gray-50); border-radius: var(--radius);
}
.tool-score-number { font-size: 2rem; font-weight: 800; color: var(--green-600); }
.tool-score-label { font-size: .9rem; color: var(--gray-500); }
.tool-final {
  text-align: center; padding: 40px 20px;
}
.tool-final h3 { font-size: 1.5rem; margin-bottom: 8px; }
.tool-final p { color: var(--gray-500); margin-bottom: 24px; }

/* ===== Download Page ===== */
.download-hero {
  padding: 100px 0 80px;
  background: linear-gradient(135deg, var(--green-50) 0%, #faf5ff 50%, var(--green-50) 100%);
  text-align: center;
}
.download-hero h1 { font-size: 2.8rem; margin-bottom: 16px; }
.download-hero p { font-size: 1.2rem; color: var(--gray-500); max-width: 560px; margin: 0 auto 32px; }
.download-badges { display: flex; gap: 16px; justify-content: center; align-items: center; flex-wrap: wrap; }
.download-qr {
  margin: 40px auto 0; padding: 20px; background: #fff;
  border-radius: var(--radius); box-shadow: var(--shadow-lg);
  display: inline-block;
}
.download-qr p { font-size: .85rem; color: var(--gray-500); margin-top: 8px; }

/* ===== Nav Icon ===== */
.nav-icon {
  width: 32px; height: 32px; border-radius: 8px;
  display: inline-block; vertical-align: middle;
}

/* ===== Screenshot Gallery ===== */
.screenshot-gallery {
  display: flex; gap: 16px;
  overflow-x: auto; padding: 10px 0 20px;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}
.screenshot-gallery::-webkit-scrollbar { height: 8px; }
.screenshot-gallery::-webkit-scrollbar-track { background: var(--gray-100); border-radius: 4px; }
.screenshot-gallery::-webkit-scrollbar-thumb { background: var(--green-500); border-radius: 4px; }
.screenshot-item {
  flex-shrink: 0; border-radius: 16px; overflow: hidden;
  box-shadow: var(--shadow-lg); transition: transform .3s;
}
.screenshot-item:hover { transform: translateY(-5px); }
.screenshot-item img { display: block; height: 480px; width: auto; object-fit: cover; }

/* ===== Challenge Banner ===== */
.challenge-banner {
  display: block; text-decoration: none;
  padding: 24px 36px; border-radius: 16px;
  background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
  color: #fff; text-align: center;
  box-shadow: 0 5px 20px rgba(238,90,36,.3);
  transition: transform .3s, box-shadow .3s;
}
.challenge-banner:hover {
  transform: translateY(-3px); color: #fff;
  box-shadow: 0 8px 30px rgba(238,90,36,.4);
}
.challenge-banner h3 { font-size: 1.5rem; margin-bottom: 4px; }
.challenge-banner p { font-size: 1rem; opacity: .9; margin: 0; }

/* ===== AI Review Avatars ===== */
.ai-avatar {
  width: 40px; height: 40px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: .75rem;
  flex-shrink: 0;
}

/* ===== Blog Cards ===== */
.blog-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.blog-card {
  display: block; background: #fff; border-radius: var(--radius-lg);
  padding: 28px; border: 1px solid var(--gray-200);
  transition: all .3s; color: inherit;
}
.blog-card:hover { border-color: var(--green-400); box-shadow: var(--shadow-lg); transform: translateY(-3px); color: inherit; }
.blog-card-tag {
  display: inline-block; font-size: .75rem; font-weight: 700;
  color: var(--green-600); text-transform: uppercase; letter-spacing: .05em;
  background: var(--green-50); padding: 3px 10px; border-radius: 6px;
  margin-bottom: 12px;
}
.blog-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; line-height: 1.4; }
.blog-card p { color: var(--gray-500); font-size: .9rem; line-height: 1.6; }

/* ===== Blog Index ===== */
.blog-list { max-width: 780px; margin: 0 auto; }
.blog-list-item {
  display: flex; gap: 20px; padding: 24px 0;
  border-bottom: 1px solid var(--gray-200); color: inherit;
  transition: all .2s;
}
.blog-list-item:hover { color: inherit; }
.blog-list-item:hover h3 { color: var(--green-600); }
.blog-list-tag {
  flex-shrink: 0; width: 80px; text-align: center;
  font-size: .75rem; font-weight: 700; color: var(--green-600);
  text-transform: uppercase; padding-top: 4px;
}
.blog-list-item h3 { font-size: 1.1rem; margin-bottom: 6px; transition: color .2s; }
.blog-list-item p { font-size: .9rem; color: var(--gray-500); }

/* ===== Tool Preview Card ===== */
.tool-preview-card {
  display: inline-block; max-width: 440px; text-align: center;
  background: #fff; border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg); padding: 40px 32px;
  transition: all .3s; color: inherit;
}
.tool-preview-card:hover { border-color: var(--green-400); box-shadow: var(--shadow-lg); transform: translateY(-3px); color: inherit; }
.tool-preview-icon { font-size: 3rem; margin-bottom: 16px; }
.tool-preview-card h3 { font-size: 1.2rem; margin-bottom: 8px; }
.tool-preview-card p { color: var(--gray-500); font-size: .95rem; margin-bottom: 16px; }
.tool-preview-link { color: var(--green-600); font-weight: 600; font-size: .95rem; }

/* ===== Subtle App Mention ===== */
.subtle-app-mention {
  display: flex; align-items: center; gap: 20px;
  background: var(--gray-50); border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg); padding: 24px;
  margin-top: 40px; max-width: 680px; margin-left: auto; margin-right: auto;
}
.subtle-app-icon {
  width: 56px; height: 56px; border-radius: 14px;
  flex-shrink: 0; box-shadow: var(--shadow);
}
.subtle-app-mention p { font-size: .95rem; color: var(--gray-600); margin: 0; }
.subtle-app-mention a { font-weight: 600; }

/* ===== Smart App Banner spacer ===== */
.smart-banner-spacer { height: 0; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero h1 { font-size: 2.4rem; }
  .hero .container { gap: 40px; }
  .hero-visual { flex: 0 0 320px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .monster-rarity-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .screenshot-item img { height: 360px; }
  .hero { padding: 48px 0 40px; }
  .hero .container { flex-direction: column; text-align: center; }
  .hero p { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-visual { flex: none; width: 100%; max-width: 240px; }
  .hero h1 { font-size: 2rem; }

  .nav-links { display: none; }
  .nav-hamburger { display: block; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 64px; left: 0; right: 0;
    background: #fff; padding: 16px 24px; gap: 16px;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow);
  }

  .features-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .grade-grid { grid-template-columns: 1fr; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
  .subtle-app-mention { flex-direction: column; text-align: center; }
  .blog-list-item { flex-direction: column; gap: 8px; }
  .blog-list-tag { width: auto; text-align: left; }
  .monster-rarity-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }

  section { padding: 56px 0; }
  .section-title { font-size: 1.75rem; }

  .tool-input-row { flex-direction: column; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.7rem; }
  .hero-visual { max-width: 200px; }
  .cta-banner { margin: 0; border-radius: 0; }
  .cta-banner h2 { font-size: 1.5rem; }
}