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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: #fafafa;
    color: #111827; /* text-gray-900 */
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: all 0.25s ease;
}

a:hover {
    opacity: 0.8;
}

ul {
    list-style: none;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1), transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes drop-notification {
    0% { transform: translateY(-60px); opacity: 0; }
    60% { transform: translateY(8px); opacity: 1; }
    100% { transform: translateY(0); opacity: 1; }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.03); }
    100% { transform: scale(1); }
}

/* Utilities */
.container {
    width: 100%;
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.relative { position: relative; }
.absolute { position: absolute; }

.marker {
    background: linear-gradient(transparent 65%, rgba(255, 222, 89, 0.8) 0%);
    padding: 0 0.2em;
}

/* Visibility Utilities */
.hidden-mobile { display: none; }
.hidden-desktop { display: block; }

/* Header */
.lp-header {
    background-color: #FFDE59;
    padding: 0.85rem 1.2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.lp-header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.lp-logo {
    font-size: 1.2rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    letter-spacing: -0.02em;
}

.lp-logo-icon {
    width: 2.4rem;
    height: 2.4rem;
    object-fit: contain;
    background-color: white;
    padding: 0.35rem;
    border-radius: 0.75rem;
    margin-right: 0.6rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.lp-btn-back {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.55rem 1.1rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: #1f2937;
    background-color: rgba(255, 255, 255, 0.85);
    border-radius: 9999px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.lp-btn-back:hover {
    background-color: #ffffff;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* Hero Section */
.lp-hero-section {
    background: linear-gradient(180deg, #FFDE59 0%, #ffffff 100%);
    padding: 5rem 1.2rem 4rem;
    position: relative;
    overflow: hidden;
}

.lp-hero-section::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.5) 0%, transparent 70%);
    border-radius: 50%;
}

.lp-hero-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.3;
    letter-spacing: -0.01em;
}

.lp-hero-text {
    font-size: 1rem;
    color: #4b5563;
    margin-bottom: 3rem;
    max-width: 40rem;
    margin-left: auto;
    margin-right: auto;
}

.lp-hero-text span {
    display: block;
    margin-top: 0.6rem;
    font-weight: 700;
    color: #1f2937;
}

/* Screenshots Showcase */
.lp-screenshots-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: -1.5rem;
    margin: 3rem auto 4rem;
    max-width: 900px;
    padding: 0 1rem;
}

.lp-screenshot-item {
    flex: 1;
    max-width: 14rem;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
}

.lp-screenshot-item img {
    width: 100%;
    height: auto;
    border-radius: 1.25rem;
    box-shadow: 0 12px 30px rgba(0,0,0,0.12);
    border: 3px solid #ffffff;
    display: block;
}

.lp-screenshot-item.center {
    z-index: 10;
    transform: scale(1.1);
    max-width: 16rem;
}

.lp-screenshot-item.side {
    z-index: 5;
    opacity: 0.9;
}

.lp-screenshot-item.side:first-child {
    transform: rotate(-5deg) translateX(10%);
}

.lp-screenshot-item.side:last-child {
    transform: rotate(5deg) translateX(-10%);
}

.lp-screenshot-item:hover {
    z-index: 20;
    transform: scale(1.15) rotate(0deg);
    opacity: 1;
}

@media (max-width: 767px) {
    .lp-screenshots-container {
        gap: -2rem;
        margin: 2rem auto 3rem;
    }
    
    .lp-screenshot-item {
        max-width: 9rem;
    }
    
    .lp-screenshot-item.center {
        max-width: 10rem;
    }
}

/* Downloads */
.lp-download-area {
    margin-top: 2.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.2rem;
}

.lp-play-badge {
    height: 4.2rem;
    width: auto;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.1));
}

.lp-qr-box {
    display: none;
    background-color: white;
    padding: 0.6rem;
    border-radius: 0.8rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    border: 1px solid #f3f4f6;
}

.lp-qr-img {
    width: 4.5rem;
    height: 4.5rem;
}

/* Concept Section */
.lp-concept-section {
    padding: 6rem 1.2rem;
    background-color: white;
}

.lp-concept-container {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4rem;
}

.lp-concept-text {
    width: 100%;
    text-align: center;
}

.lp-concept-title {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 1.8rem;
    font-style: italic;
    color: #374151;
    line-height: 1.4;
}

.lp-concept-divider {
    width: 3.5rem;
    height: 0.3rem;
    background-color: #FFDE59;
    margin: 0 auto 2.2rem;
    border-radius: 9999px;
}

.lp-concept-desc {
    font-size: 1.05rem;
    line-height: 1.8;
    color: #4b5563;
}

.lp-concept-img-wrapper {
    width: 100%;
    display: flex;
    justify-content: center;
}

.lp-concept-img {
    max-width: 22rem;
    width: 100%;
    mix-blend-mode: multiply;
}

/* Features Section */
.lp-features-section {
    padding: 7rem 1.2rem;
    background-color: #f9fafb;
}

.lp-section-header {
    text-align: center;
    margin-bottom: 5rem;
}

.lp-section-title {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 1.2rem;
    letter-spacing: -0.01em;
}

.lp-section-desc {
    color: #6b7280;
    font-size: 1rem;
}

.lp-features-grid {
    display: grid;
    gap: 2.5rem;
    max-width: 960px;
    margin: 0 auto;
}

.lp-feature-card {
    background-color: white;
    padding: 2.5rem;
    border-radius: 2.8rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
    border: 1px solid rgba(0,0,0,0.02);
    position: relative;
    overflow: hidden;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease;
}

.lp-feature-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.lp-feature-bg-circle {
    position: absolute;
    top: 0;
    right: 0;
    width: 10rem;
    height: 10rem;
    background-color: #FFDE59;
    opacity: 0.08;
    border-radius: 50%;
    transform: translate(40%, -40%);
}

.lp-feature-header {
    display: flex;
    align-items: center;
    margin-bottom: 1.8rem;
}

.lp-feature-icon {
    width: 3.8rem;
    height: 3.8rem;
    background-color: #fffdf0;
    border: 3px solid #FFDE59;
    border-radius: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    box-shadow: 0 4px 10px rgba(255, 222, 89, 0.2);
    flex-shrink: 0;
    margin-right: 1.2rem;
}

.lp-feature-title {
    font-size: 1.35rem;
    font-weight: 800;
}

.lp-feature-text {
    font-size: 0.95rem;
    color: #4b5563;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.lp-feature-list {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.lp-feature-item {
    display: flex;
    align-items: center;
    color: #374151;
    font-weight: 600;
    font-size: 0.95rem;
}

.lp-check-icon {
    width: 1.4rem;
    height: 1.4rem;
    background-color: #fef3c7;
    color: #ca8a04;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    margin-right: 0.8rem;
    flex-shrink: 0;
}

/* Use Cases Section */
.lp-usecases-section {
    padding: 7rem 1.2rem;
    background-color: #FFDE59;
    position: relative;
}

.lp-usecases-grid {
    display: grid;
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.lp-usecase-card {
    background-color: white;
    padding: 2rem;
    border-radius: 2.2rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease;
}

.lp-usecase-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.15);
}

.lp-usecase-header {
    display: flex;
    align-items: center;
    margin-bottom: 1.8rem;
}

.lp-usecase-emoji {
    font-size: 2.2rem;
    margin-right: 1.2rem;
}

.lp-usecase-title {
    font-size: 1.2rem;
    font-weight: 800;
}

.lp-usecase-notification {
    background-color: #f9fafb;
    border-radius: 1.1rem;
    padding: 1.1rem;
    margin-bottom: 1.8rem;
    border-left: 5px solid #facc15;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}

/* CTA Section */
.lp-cta-section {
    padding: 7rem 1.2rem;
    background-color: white;
    text-align: center;
}

.lp-cta-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 1.8rem;
    line-height: 1.3;
}

.lp-pulse-button {
    animation: pulse 2s infinite ease-in-out;
}

/* Footer */
.lp-footer {
    background-color: #111827;
    color: white;
    padding: 4rem 1.2rem;
}

.lp-footer-container {
    max-width: 1100px;
    margin: 0 auto;
    text-align: center;
}

.lp-footer-title {
    font-weight: 800;
    margin-bottom: 0.8rem;
    font-size: 1.2rem;
}

.lp-footer-desc {
    color: #9ca3af;
    font-size: 0.9rem;
    margin-bottom: 2.5rem;
}

.lp-footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    font-size: 0.9rem;
    color: #6b7280;
    margin-bottom: 2.5rem;
}

.lp-footer-links a:hover {
    color: #FFDE59;
}

.lp-copyright {
    font-size: 11px;
    color: #4b5563;
    letter-spacing: 0.02em;
}

/* Desktop Media Queries */
@media (min-width: 768px) {
    .hidden-mobile { display: block; }
    .hidden-desktop { display: none; }
    
    .lp-hero-title { font-size: 3.5rem; }
    .lp-hero-text { font-size: 1.25rem; }
    .lp-hero-text span { display: inline; margin-top: 0; }
    
    .lp-download-area { flex-direction: row; gap: 1.5rem; }
    .lp-qr-box { display: block; }
    
    .lp-concept-container { flex-direction: row; gap: 5rem; }
    .lp-concept-text { width: 50%; text-align: left; }
    .lp-concept-title { font-size: 2.2rem; }
    .lp-concept-divider { margin-left: 0; margin-right: 0; }
    .lp-concept-desc { font-size: 1.15rem; }
    .lp-concept-img-wrapper { width: 50%; }
    .lp-concept-img { max-width: 28rem; }
    
    .lp-section-title { font-size: 2.2rem; }
    
    .lp-features-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4rem; }
    .lp-feature-card { padding: 3.5rem; }
    
    .lp-usecases-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2.5rem; }
    
    .lp-cta-title { font-size: 2.8rem; }
}