:root {
    --ink: #1a1008;
    --paper: #f5f0e8;
    --paper2: #ede7d9;
    --red: #c0392b;
    --red-light: #e74c3c;
    --gold: #b8860b;
    --gold-light: #d4a017;
    --muted: #6b5a4e;
    --brush: #2c1810;
  }

  * { margin: 0; padding: 0; box-sizing: border-box; }

  html { scroll-behavior: smooth; }

  body {
    background: var(--paper);
    color: var(--ink);
    font-family: 'Space Mono', monospace;
    overflow-x: hidden;
    cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath fill='%231a1008' d='M3 17.25V21h3.75L17.81 9.94l-3.75-3.75L3 17.25zM20.71 7.04a1 1 0 0 0 0-1.41l-2.34-2.34a1 1 0 0 0-1.41 0l-1.83 1.83 3.75 3.75 1.83-1.83z'/%3E%3C/svg%3E") 0 24, crosshair;
  }

  /* ── NOISE TEXTURE OVERLAY ── */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9999;
    opacity: 0.6;
  }

  /* ── JAPANESE GRID LINES ── */
  body::after {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
      linear-gradient(rgba(26,16,8,0.04) 1px, transparent 1px),
      linear-gradient(90deg, rgba(26,16,8,0.04) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: 0;
  }

  /* ════════════════════════════
     NAVBAR
  ════════════════════════════ */
  nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.2rem 3rem;
    background: rgba(245,240,232,0.85);
    backdrop-filter: blur(12px);
    border-bottom: 2px solid var(--ink);
  }

  .nav-logo {
    font-family: 'Cinzel Decorative', serif;
    font-size: 1.1rem;
    font-weight: 900;
    letter-spacing: 0.05em;
    color: var(--ink);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .nav-logo span { color: var(--red); }

  .nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
  }

  .nav-links a {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--muted);
    text-decoration: none;
    transition: color 0.2s;
  }

  .nav-links a:hover { color: var(--red); }

  .nav-cta {
    background: var(--ink);
    color: var(--paper) !important;
    padding: 0.6rem 1.5rem;
    border: 2px solid var(--ink);
    transition: background 0.2s, color 0.2s !important;
  }

  .nav-cta:hover {
    background: var(--red) !important;
    border-color: var(--red) !important;
    color: white !important;
  }

  /* ════════════════════════════
     HERO
  ════════════════════════════ */
  #hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
  }

  /* BIG SUN */
  .hero-sun {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 480px;
    height: 480px;
    border-radius: 50%;
    background: radial-gradient(circle at 40% 40%, #e8c49a, #c0392b 55%, #7b1a10);
    opacity: 0.18;
    animation: sunPulse 6s ease-in-out infinite;
    pointer-events: none;
  }

  @keyframes sunPulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.18; }
    50% { transform: translate(-50%, -50%) scale(1.04); opacity: 0.22; }
  }

  /* INK SPLASH SVG BG */
  .hero-ink-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
  }

  .hero-ink-bg svg {
    width: 100%;
    height: 100%;
    opacity: 0.07;
  }

  /* LEFT COLUMN */
  .hero-left {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 6rem 4rem 4rem 5rem;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--ink);
    color: var(--paper);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    padding: 0.4rem 1rem;
    margin-bottom: 2rem;
    width: fit-content;
    animation: slideIn 0.8s ease 0.2s both;
  }

  .hero-badge::before {
    content: '●';
    color: var(--red);
    animation: blink 1.5s infinite;
  }

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

  @keyframes slideIn {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
  }

  .hero-kanji {
    font-family: 'Noto Serif JP', serif;
    font-size: 4rem;
    font-weight: 900;
    color: var(--ink);
    line-height: 1;
    letter-spacing: -0.02em;
    animation: slideIn 0.8s ease 0.35s both;
  }

  .hero-kanji .red-accent { color: var(--red); }

  .hero-subtitle-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 0.5rem 0 1.5rem;
    animation: slideIn 0.8s ease 0.5s both;
  }

  .hero-line {
    height: 2px;
    width: 50px;
    background: var(--red);
  }

  .hero-sub-text {
    font-family: 'Noto Serif JP', serif;
    font-size: 1rem;
    color: var(--muted);
    letter-spacing: 0.08em;
  }

  .hero-desc {
    font-size: 0.78rem;
    line-height: 1.9;
    color: var(--muted);
    max-width: 420px;
    margin-bottom: 2.5rem;
    animation: slideIn 0.8s ease 0.65s both;
  }

  .hero-desc strong { color: var(--ink); }

  .hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    animation: slideIn 0.8s ease 0.8s both;
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background: var(--ink);
    color: var(--paper);
    font-family: 'Space Mono', monospace;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 1rem 2rem;
    border: 2px solid var(--ink);
    text-decoration: none;
    transition: all 0.25s;
    position: relative;
    overflow: hidden;
  }

  .btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--red);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
    z-index: -1;
  }

  .btn-primary:hover { border-color: var(--red); color: white; }
  .btn-primary:hover::after { transform: scaleX(1); transform-origin: left; }

  .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background: transparent;
    color: var(--ink);
    font-family: 'Space Mono', monospace;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 1rem 2rem;
    border: 2px solid var(--ink);
    text-decoration: none;
    transition: all 0.25s;
  }

  .btn-secondary:hover { background: var(--paper2); }

  /* RIGHT COLUMN */
  .hero-right {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 4rem 4rem;
    animation: fadeUp 1s ease 0.4s both;
  }

  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* PHONE MOCKUP */
  .phone-wrap {
    position: relative;
  }

  .phone-frame {
    width: 260px;
    height: 520px;
    background: var(--ink);
    border-radius: 36px;
    border: 3px solid var(--brush);
    box-shadow:
      12px 12px 0 var(--red),
      24px 24px 0 rgba(192,57,43,0.15),
      0 40px 80px rgba(26,16,8,0.3);
    overflow: hidden;
    position: relative;
  }

  .phone-notch {
    width: 80px;
    height: 20px;
    background: var(--brush);
    border-radius: 0 0 14px 14px;
    margin: 0 auto;
    position: relative;
    z-index: 5;
  }

  .phone-screen {
    background: #0f0a06;
    height: calc(100% - 20px);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
  }

  .phone-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid rgba(245,240,232,0.1);
  }

  .phone-logo-circle {
    width: 28px;
    height: 28px;
    background: var(--red);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.5rem;
    font-weight: 900;
    color: white;
    font-family: 'Cinzel Decorative', serif;
  }

  .phone-app-name {
    font-size: 0.6rem;
    font-weight: 700;
    color: var(--paper);
    font-family: 'Cinzel Decorative', serif;
    letter-spacing: 0.05em;
  }

  .phone-course-card {
    background: rgba(245,240,232,0.07);
    border: 1px solid rgba(245,240,232,0.12);
    border-radius: 10px;
    padding: 0.7rem;
    transition: all 0.3s;
    animation: cardFloat 0.5s ease both;
  }

  .phone-course-card:nth-child(2) { animation-delay: 0.1s; }
  .phone-course-card:nth-child(3) { animation-delay: 0.2s; }
  .phone-course-card:nth-child(4) { animation-delay: 0.3s; }
  .phone-course-card:nth-child(5) { animation-delay: 0.4s; }

  @keyframes cardFloat {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .phone-course-title {
    font-size: 0.55rem;
    font-weight: 700;
    color: var(--paper);
    margin-bottom: 0.2rem;
  }

  .phone-course-meta {
    font-size: 0.45rem;
    color: rgba(245,240,232,0.5);
    margin-bottom: 0.4rem;
  }

  .phone-progress-bar {
    height: 3px;
    background: rgba(245,240,232,0.1);
    border-radius: 2px;
    overflow: hidden;
  }

  .phone-progress-fill {
    height: 100%;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--red), var(--gold-light));
    animation: progressGrow 2s ease 1s both;
  }

  @keyframes progressGrow {
    from { width: 0%; }
  }

  .phone-free-tag {
    position: absolute;
    bottom: 1rem;
    right: -10px;
    background: var(--red);
    color: white;
    font-size: 0.5rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    padding: 0.3rem 0.6rem;
    text-transform: uppercase;
  }

  /* FLOATING ELEMENTS */
  .float-badge {
    position: absolute;
    background: var(--paper);
    border: 2px solid var(--ink);
    padding: 0.6rem 1rem;
    font-size: 0.6rem;
    font-weight: 700;
    color: var(--ink);
    box-shadow: 4px 4px 0 var(--ink);
    white-space: nowrap;
  }

  .float-badge-1 {
    top: 15%;
    left: -60px;
    animation: floatY 4s ease-in-out infinite;
  }

  .float-badge-2 {
    bottom: 20%;
    right: -50px;
    animation: floatY 4s ease-in-out infinite 2s;
  }

  @keyframes floatY {
    0%,100%{ transform: translateY(0); }
    50% { transform: translateY(-8px); }
  }

  /* VERTICAL JAPANESE TEXT */
  .kanji-strip {
    position: absolute;
    left: 2rem;
    top: 50%;
    transform: translateY(-50%);
    writing-mode: vertical-rl;
    font-family: 'Noto Serif JP', serif;
    font-size: 0.75rem;
    letter-spacing: 0.3em;
    color: rgba(26,16,8,0.15);
    pointer-events: none;
  }

  .kanji-strip-right {
    left: auto;
    right: 2rem;
  }

  /* STATS BAR */
  .stats-bar {
    background: var(--ink);
    color: var(--paper);
    padding: 1.2rem 5rem;
    display: flex;
    gap: 0;
    overflow: hidden;
    position: relative;
    z-index: 5;
  }

  .stat-item {
    flex: 1;
    text-align: center;
    padding: 0 2rem;
    border-right: 1px solid rgba(245,240,232,0.15);
  }

  .stat-item:last-child { border-right: none; }

  .stat-num {
    font-family: 'Cinzel Decorative', serif;
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--red-light);
    display: block;
    line-height: 1;
  }

  .stat-label {
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(245,240,232,0.5);
    margin-top: 0.3rem;
    display: block;
  }

  /* ════════════════════════════
     SECTION: COURSES
  ════════════════════════════ */
  #courses {
    padding: 6rem 5rem;
    position: relative;
    overflow: hidden;
  }

  .section-header {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    margin-bottom: 4rem;
  }

  .section-num {
    font-family: 'Cinzel Decorative', serif;
    font-size: 5rem;
    font-weight: 900;
    color: rgba(26,16,8,0.06);
    line-height: 1;
    flex-shrink: 0;
  }

  .section-title-block { }

  .section-eyebrow {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--red);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
  }

  .section-eyebrow::before {
    content: '';
    width: 20px;
    height: 2px;
    background: var(--red);
  }

  .section-h2 {
    font-family: 'Noto Serif JP', serif;
    font-size: 2.8rem;
    font-weight: 900;
    line-height: 1.1;
    color: var(--ink);
  }

  .courses-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border: 2px solid var(--ink);
  }

  .course-card {
    padding: 2rem;
    border-right: 2px solid var(--ink);
    position: relative;
    overflow: hidden;
    transition: background 0.3s;
  }

  .course-card:last-child { border-right: none; }
  .course-card:nth-child(n+4) { border-top: 2px solid var(--ink); }

  .course-card:hover { background: var(--paper2); }

  .course-card::before {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 100%;
    height: 3px;
    background: var(--red);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s;
  }

  .course-card:hover::before { transform: scaleX(1); }

  .course-icon {
    width: 44px;
    height: 44px;
    background: var(--ink);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin-bottom: 1rem;
  }

  .course-level {
    font-size: 0.55rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    padding: 0.2rem 0.6rem;
    background: var(--paper2);
    color: var(--muted);
    width: fit-content;
    margin-bottom: 0.8rem;
  }

  .course-card.featured .course-level {
    background: var(--red);
    color: white;
  }

  .course-name {
    font-family: 'Noto Serif JP', serif;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 0.5rem;
    line-height: 1.3;
  }

  .course-desc {
    font-size: 0.7rem;
    line-height: 1.7;
    color: var(--muted);
    margin-bottom: 1.2rem;
  }

  .course-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.6rem;
    color: var(--muted);
    font-weight: 700;
  }

  .course-meta span { display: flex; align-items: center; gap: 0.3rem; }

  .free-badge {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: var(--red);
    color: white;
    font-size: 0.55rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    padding: 0.25rem 0.6rem;
  }

  /* ════════════════════════════
     WHY SECTION
  ════════════════════════════ */
  #why {
    background: var(--ink);
    color: var(--paper);
    padding: 6rem 5rem;
    position: relative;
    overflow: hidden;
  }

  #why .section-num { color: rgba(245,240,232,0.05); }
  #why .section-h2 { color: var(--paper); }

  .why-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-top: 4rem;
  }

  .why-points { display: flex; flex-direction: column; gap: 2rem; }

  .why-point {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(245,240,232,0.1);
  }

  .why-point:last-child { border-bottom: none; padding-bottom: 0; }

  .why-num {
    font-family: 'Cinzel Decorative', serif;
    font-size: 2rem;
    font-weight: 900;
    color: var(--red);
    line-height: 1;
    flex-shrink: 0;
  }

  .why-point-title {
    font-family: 'Noto Serif JP', serif;
    font-size: 1rem;
    font-weight: 700;
    color: var(--paper);
    margin-bottom: 0.4rem;
  }

  .why-point-desc {
    font-size: 0.7rem;
    line-height: 1.8;
    color: rgba(245,240,232,0.55);
  }

  /* BIG QUOTE */
  .why-quote-block {
    position: relative;
    padding: 3rem;
    border: 2px solid rgba(245,240,232,0.15);
  }

  .why-quote-block::before {
    content: '「';
    font-family: 'Noto Serif JP', serif;
    font-size: 8rem;
    color: var(--red);
    opacity: 0.3;
    position: absolute;
    top: -1rem;
    left: 1rem;
    line-height: 1;
  }

  .why-quote-text {
    font-family: 'Noto Serif JP', serif;
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.6;
    color: var(--paper);
    position: relative;
    z-index: 1;
  }

  .why-quote-text span { color: var(--red-light); }

  .why-quote-sub {
    font-size: 0.65rem;
    color: rgba(245,240,232,0.4);
    margin-top: 1.5rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
  }

  /* WAVE DIVIDER */
  .wave-divider {
    position: relative;
    overflow: hidden;
    height: 80px;
    background: var(--ink);
  }

  .wave-divider::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: var(--paper);
    clip-path: ellipse(55% 100% at 50% 100%);
  }

  .wave-divider.flip {
    background: var(--paper);
  }

  .wave-divider.flip::after {
    background: var(--ink);
    clip-path: ellipse(55% 100% at 50% 100%);
  }

  /* ════════════════════════════
     DOWNLOAD CTA
  ════════════════════════════ */
  #download {
    padding: 7rem 5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
  }

  #download::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(192,57,43,0.08) 0%, transparent 70%);
  }

  .download-eyebrow {
    font-size: 0.65rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--red);
    margin-bottom: 1rem;
    font-weight: 700;
  }

  .download-h2 {
    font-family: 'Noto Serif JP', serif;
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--ink);
    line-height: 1.15;
    margin-bottom: 1rem;
  }

  .download-h2 span { color: var(--red); }

  .download-sub {
    font-size: 0.78rem;
    color: var(--muted);
    max-width: 480px;
    margin: 0 auto 3rem;
    line-height: 1.8;
  }

  .download-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 2rem;
  }

  .btn-download {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    background: var(--ink);
    color: var(--paper);
    font-family: 'Space Mono', monospace;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 1.1rem 2.5rem;
    border: 2px solid var(--ink);
    text-decoration: none;
    transition: all 0.25s;
    letter-spacing: 0.05em;
    position: relative;
    overflow: hidden;
  }

  .btn-download .icon { font-size: 1.2rem; }

  .btn-download:hover {
    background: var(--red);
    border-color: var(--red);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(192,57,43,0.3);
  }

  .download-note {
    font-size: 0.6rem;
    color: var(--muted);
    letter-spacing: 0.1em;
  }

  /* TESTIMONIALS */
  .testimonials-row {
    display: flex;
    gap: 1.5rem;
    margin-top: 4rem;
    justify-content: center;
    flex-wrap: wrap;
  }

  .testi-card {
    background: var(--paper2);
    border: 2px solid rgba(26,16,8,0.12);
    padding: 1.5rem;
    max-width: 260px;
    text-align: left;
    position: relative;
  }

  .testi-card::before {
    content: '"';
    font-family: 'Noto Serif JP', serif;
    font-size: 3rem;
    color: var(--red);
    opacity: 0.4;
    position: absolute;
    top: 0.2rem;
    left: 0.8rem;
    line-height: 1;
  }

  .testi-text {
    font-size: 0.7rem;
    line-height: 1.7;
    color: var(--muted);
    margin-bottom: 1rem;
    margin-top: 0.5rem;
  }

  .testi-name {
    font-size: 0.6rem;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: 0.1em;
  }

  .testi-college {
    font-size: 0.55rem;
    color: var(--muted);
  }

  /* ════════════════════════════
     FOOTER
  ════════════════════════════ */
  footer {
    background: var(--brush);
    color: rgba(245,240,232,0.6);
    padding: 3rem 5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 3px solid var(--red);
  }

  .footer-brand {
    font-family: 'Cinzel Decorative', serif;
    font-size: 1rem;
    font-weight: 900;
    color: var(--paper);
  }

  .footer-brand span { color: var(--red); }

  .footer-copy {
    font-size: 0.6rem;
    letter-spacing: 0.1em;
  }

  .footer-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
  }

  .footer-links a {
    font-size: 0.6rem;
    color: rgba(245,240,232,0.5);
    text-decoration: none;
    letter-spacing: 0.1em;
    transition: color 0.2s;
  }

  .footer-links a:hover { color: var(--red-light); }

  /* ════════════════════════════
     INK BRUSH STROKES - DECORATIVE
  ════════════════════════════ */
  .ink-stroke {
    position: absolute;
    pointer-events: none;
    opacity: 0.06;
  }

  /* SCROLL ANIMATIONS */
  .reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }

  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* MOBILE */
  @media (max-width: 900px) {
    #hero { grid-template-columns: 1fr; }
    .hero-right { display: none; }
    .hero-left { padding: 6rem 2rem 3rem; }
    .hero-kanji { font-size: 2.8rem; }
    nav { padding: 1rem 1.5rem; }
    .nav-links { display: none; }
    #courses { padding: 4rem 2rem; }
    .courses-grid { grid-template-columns: 1fr; }
    .course-card { border-right: none; border-bottom: 2px solid var(--ink); }
    #why { padding: 4rem 2rem; }
    .why-grid { grid-template-columns: 1fr; }
    #download { padding: 5rem 2rem; }
    .download-h2 { font-size: 2.3rem; }
    footer { flex-direction: column; gap: 1.5rem; text-align: center; padding: 2rem; }
    .stats-bar { padding: 1rem 1.5rem; }
    .testimonials-row { flex-direction: column; align-items: center; }
  }