:root {
    --banana-yellow: #FFD43B;
    --soft-cream: #FFF9E6;
    --morandi-blue: #E8F1F8;
    --morandi-yellow: #FDF2CC;
    --text-dark: #2C2C2C;
    --text-gray: #666;
    --border-black: #1A1A1A;
    --white: #FFFFFF;
    --radius-card: 20px;
    --radius-pill: 50px;
    --shadow-soft: 0 4px 12px rgba(0,0,0,0.05);
    --shadow-hover: 0 8px 24px rgba(0,0,0,0.08);
  }

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

  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-dark);
    background-color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
  }

  a { text-decoration: none; color: inherit; }
  ul { list-style: none; }
  img { max-width: 100%; display: block; }

  /* Header */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--border-black);
    padding: 0 20px;
  }
  .header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
  }
  .brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--border-black);
  }
  .brand-logo img {
    height: 34px;
    width: auto;
  }
  .nav-links {
    display: flex;
    gap: 24px;
    font-size: 0.95rem;
    font-weight: 600;
  }
  .nav-links a {
    position: relative;
    transition: color 0.3s;
  }
  .nav-links a:hover { color: #D4A000; }
  .nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--banana-yellow);
    border-radius: 2px;
    transition: width 0.3s;
  }
  .nav-links a:hover::after { width: 100%; }

  /* Hero */
  .hero-section {
    background: linear-gradient(135deg, var(--soft-cream) 0%, var(--morandi-blue) 100%);
    padding: 60px 20px 80px;
    position: relative;
    overflow: hidden;
  }
  .hero-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
  }
  .hero-text h1 {
    font-size: 2.8rem;
    line-height: 1.2;
    margin-bottom: 20px;
    font-weight: 900;
  }
  .hero-text h1 span {
    background: var(--banana-yellow);
    padding: 0 8px;
    border-radius: 8px;
    display: inline-block;
    transform: rotate(-1deg);
  }
  .hero-desc {
    font-size: 1.1rem;
    color: var(--text-gray);
    margin-bottom: 30px;
    max-width: 480px;
  }
  .hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
  }
  .btn-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius-pill);
    font-weight: 700;
    font-size: 1rem;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 2px solid transparent;
  }
  .btn-primary {
    background: var(--banana-yellow);
    color: var(--border-black);
    border-color: var(--border-black);
    box-shadow: 3px 3px 0 var(--border-black);
  }
  .btn-primary:hover {
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0 var(--border-black);
  }
  .btn-outline {
    background: var(--white);
    color: var(--border-black);
    border-color: var(--border-black);
  }
  .btn-outline:hover {
    background: var(--soft-cream);
    transform: translateY(-2px);
  }
  .hero-visual {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .hero-visual img {
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-hover);
    object-fit: cover;
    aspect-ratio: 3/4;
    border: 3px solid var(--white);
    transition: transform 0.3s;
  }
  .hero-visual img:hover { transform: scale(1.02); }

  /* Section Common */
  .section-padding { padding: 80px 20px; }
  .section-inner { max-width: 1200px; margin: 0 auto; }
  .section-header { margin-bottom: 48px; }
  .section-header h2 {
    font-size: 2.2rem;
    margin-bottom: 12px;
    font-weight: 800;
  }
  .section-header p {
    color: var(--text-gray);
    font-size: 1.05rem;
  }

  /* Summer Booklist (Masonry) */
  .masonry-grid {
    column-count: 3;
    column-gap: 24px;
  }
  .masonry-item {
    break-inside: avoid;
    margin-bottom: 24px;
    background: var(--white);
    border-radius: var(--radius-card);
    padding: 12px;
    border: 2px solid var(--border-black);
    box-shadow: 4px 4px 0 rgba(0,0,0,0.05);
    transition: transform 0.3s, box-shadow 0.3s;
  }
  .masonry-item:hover {
    transform: translateY(-6px);
    box-shadow: 6px 10px 0 rgba(0,0,0,0.08);
  }
  .masonry-item img {
    width: 100%;
    border-radius: 12px;
    margin-bottom: 12px;
    object-fit: cover;
  }
  .masonry-item h3 {
    font-size: 1.1rem;
    margin-bottom: 6px;
  }
  .masonry-item p {
    font-size: 0.85rem;
    color: var(--text-gray);
  }

  /* New Releases (Timeline) */
  .timeline-section { background: var(--morandi-blue); }
  .timeline-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: relative;
    padding-left: 20px;
  }
  .timeline-list::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--border-black);
    border-radius: 2px;
  }
  .timeline-item {
    display: flex;
    gap: 20px;
    background: var(--white);
    padding: 16px 20px;
    border-radius: var(--radius-card);
    border: 2px solid var(--border-black);
    transition: transform 0.2s;
  }
  .timeline-item:hover { transform: translateX(6px); }
  .timeline-date {
    min-width: 90px;
    font-weight: 800;
    color: #D4A000;
    font-size: 0.95rem;
  }
  .timeline-content {
    display: flex;
    gap: 16px;
    align-items: center;
    flex: 1;
  }
  .timeline-content img {
    width: 60px;
    height: 80px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid #eee;
  }
  .timeline-info h3 { font-size: 1.1rem; margin-bottom: 4px; }
  .timeline-info p { font-size: 0.85rem; color: var(--text-gray); }
  .timeline-info .tag {
    display: inline-block;
    background: var(--morandi-yellow);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    margin-top: 6px;
    font-weight: 600;
  }

  /* Gallery (Carousel) */
  .gallery-section { padding: 0; overflow: hidden; }
  .gallery-track {
    display: flex;
    gap: 16px;
    padding: 40px 20px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
  }
  .gallery-track::-webkit-scrollbar { display: none; }
  .gallery-slide {
    min-width: 75%;
    scroll-snap-align: center;
    position: relative;
    border-radius: var(--radius-card);
    overflow: hidden;
    border: 3px solid var(--border-black);
  }
  .gallery-slide img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: transform 0.5s;
  }
  .gallery-slide:hover img { transform: scale(1.03); }
  .gallery-thumbs {
    display: flex;
    justify-content: center;
    gap: 12px;
    padding: 20px;
  }
  .gallery-thumb {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    overflow: hidden;
    border: 2px solid transparent;
    cursor: pointer;
    transition: border-color 0.2s;
  }
  .gallery-thumb.active, .gallery-thumb:hover { border-color: var(--border-black); }
  .gallery-thumb img { width: 100%; height: 100%; object-fit: cover; }

  /* Split Screen Dashboard */
  .split-section { background: var(--soft-cream); }
  .split-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: stretch;
  }
  .split-card {
    background: var(--white);
    border-radius: var(--radius-card);
    padding: 32px;
    border: 2px solid var(--border-black);
    box-shadow: 6px 6px 0 rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
  }
  .split-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
  }
  .split-card p {
    color: var(--text-gray);
    margin-bottom: 24px;
    font-size: 0.95rem;
  }
  .ui-wireframe {
    background: var(--morandi-blue);
    border-radius: 12px;
    padding: 16px;
    border: 2px dashed #ccc;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .ui-line { height: 12px; background: #fff; border-radius: 6px; }
  .ui-line.short { width: 60%; }
  .ui-circle { width: 40px; height: 40px; border-radius: 50%; background: var(--banana-yellow); align-self: center; margin-top: 10px; }
  .sync-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
    margin-top: 20px;
  }
  .device-icon {
    width: 80px;
    height: 120px;
    border: 3px solid var(--border-black);
    border-radius: 16px;
    background: var(--white);
    position: relative;
  }
  .device-icon::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 4px;
    background: #ccc;
    border-radius: 2px;
  }
  .device-icon.tablet {
    width: 100px;
    height: 140px;
  }
  .sync-line {
    width: 100%;
    height: 2px;
    background: var(--border-black);
    position: relative;
    margin: 20px 0;
    overflow: hidden;
  }
  .sync-line::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--banana-yellow), transparent);
    animation: flow 2s infinite linear;
  }
  @keyframes flow {
    0% { left: -100%; }
    100% { left: 100%; }
  }

  /* FAQ (Capsule Accordion) */
  .faq-list { display: flex; flex-direction: column; gap: 16px; }
  .faq-item {
    background: var(--white);
    border: 2px solid var(--border-black);
    border-radius: var(--radius-card);
    overflow: hidden;
  }
  .faq-btn {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 20px 24px;
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: inherit;
    color: var(--text-dark);
  }
  .faq-btn::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: 400;
    transition: transform 0.3s;
  }
  .faq-item.open .faq-btn::after { transform: rotate(45deg); }
  .faq-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out;
    padding: 0 24px;
    color: var(--text-gray);
    font-size: 0.95rem;
  }
  .faq-item.open .faq-content {
    max-height: 200px;
    padding-bottom: 20px;
  }

  /* Download CTA */
  .download-section {
    background: var(--banana-yellow);
    text-align: center;
    padding: 80px 20px;
  }
  .download-section h2 { margin-bottom: 16px; font-size: 2.2rem; }
  .download-section p { margin-bottom: 40px; color: #333; font-size: 1.05rem; }
  .download-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
  }
  .download-buttons .btn-pill {
    background: var(--white);
    border: 2px solid var(--border-black);
    box-shadow: 3px 3px 0 var(--border-black);
    color: var(--border-black);
    font-size: 1.1rem;
    padding: 14px 34px;
  }
  .download-buttons .btn-pill:hover {
    background: var(--soft-cream);
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0 var(--border-black);
  }
  .install-tips {
    max-width: 680px;
    margin: 0 auto 40px;
    text-align: left;
    background: rgba(255,255,255,0.6);
    padding: 24px;
    border-radius: var(--radius-card);
  }
  .install-tips h3 { margin-bottom: 12px; font-size: 1.1rem; }
  .install-tips ul { padding-left: 20px; color: #444; font-size: 0.95rem; }
  .install-tips li { margin-bottom: 8px; }

  /* Footer */
  .site-footer {
    background: var(--white);
    border-top: 2px solid var(--border-black);
    padding: 40px 20px 20px;
  }
  .footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 24px;
  }
  .footer-brand { max-width: 320px; }
  .footer-brand p { font-size: 0.9rem; color: var(--text-gray); margin-top: 12px; }
  .footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
  .footer-links a { font-size: 0.9rem; color: var(--text-gray); }
  .footer-links a:hover { color: var(--border-black); }
  .footer-bottom {
    max-width: 1200px;
    margin: 32px auto 0;
    padding-top: 20px;
    border-top: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: #999;
    flex-wrap: wrap;
    gap: 12px;
  }

  /* Copy Box Modal */
  .copy-modal {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
  }
  .copy-modal.show { display: flex; }
  .copy-box {
    background: var(--white);
    border-radius: var(--radius-card);
    padding: 32px;
    max-width: 400px;
    width: 100%;
    text-align: center;
    border: 3px solid var(--border-black);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  }
  .copy-box p { margin-bottom: 20px; font-size: 1rem; color: #333; line-height: 1.5; }
  .copy-url {
    background: #f5f5f5;
    padding: 12px;
    border-radius: 8px;
    word-break: break-all;
    font-size: 0.9rem;
    margin-bottom: 20px;
    border: 1px solid #ddd;
  }
  .copy-btn {
    background: var(--banana-yellow);
    border: 2px solid var(--border-black);
    padding: 10px 24px;
    border-radius: var(--radius-pill);
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s;
    font-family: inherit;
    font-size: 1rem;
  }
  .copy-btn:hover { transform: scale(1.05); }

  /* Responsive */
  @media (max-width: 1024px) {
    .hero-grid { grid-template-columns: 1fr; text-align: center; }
    .hero-text h1 { font-size: 2.2rem; }
    .hero-desc { margin: 0 auto 30px; }
    .hero-actions { justify-content: center; }
    .hero-visual { max-width: 500px; margin: 0 auto; }
    .masonry-grid { column-count: 2; }
    .split-container { grid-template-columns: 1fr; }
    .nav-links { display: none; }
  }

  @media (max-width: 768px) {
    .hero-text h1 { font-size: 1.8rem; }
    .masonry-grid { column-count: 1; }
    .timeline-item { flex-direction: column; gap: 12px; }
    .timeline-content { flex-direction: column; text-align: center; }
    .gallery-slide { min-width: 90%; }
    .gallery-slide img { height: 280px; }
    .split-card { padding: 24px; }
    .footer-inner { flex-direction: column; align-items: center; text-align: center; }
    .footer-links { justify-content: center; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .download-buttons { flex-direction: column; align-items: center; }
    .download-buttons .btn-pill { width: 100%; max-width: 300px; }
    .copy-box { padding: 24px; }
  }