/* ========================================
   掃除日記 - メインスタイルシート
   ======================================== */

/* ----------------------------------------
   1. CSS Variables
   ---------------------------------------- */
:root {
    /* Primary Colors */
    --color-primary: #3399FF;
    --color-primary-dark: #2370CC;
    --color-primary-light: #66B2FF;
    
    /* Secondary Colors */
    --color-success: #4CAF50;
    --color-warning: #FF9800;
    --color-danger: #FF6B6B;
    --color-info: #9C27B0;
    
    /* Neutral Colors */
    --color-white: #FFFFFF;
    --color-black: #333333;
    --color-gray-100: #F5F5F5;
    --color-gray-200: #E0E0E0;
    --color-gray-300: #BDBDBD;
    --color-gray-400: #9E9E9E;
    --color-gray-500: #757575;
    --color-gray-600: #616161;
    
    /* Typography */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-secondary: 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    --spacing-xxxl: 64px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-pill: 50px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ----------------------------------------
   2. Reset & Base Styles
   ---------------------------------------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--color-black);
    background-color: var(--color-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

a:hover {
    opacity: 0.8;
}

/* ----------------------------------------
   3. Typography
   ---------------------------------------- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
    margin-bottom: var(--spacing-md);
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-success) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ----------------------------------------
   4. Layout Components
   ---------------------------------------- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xxxl);
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-500);
    font-weight: 400;
}

/* ----------------------------------------
   5. Buttons
   ---------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-pill);
    font-family: var(--font-secondary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    opacity: 1;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
}

.btn-white {
    background: var(--color-white);
    color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-xxl);
    font-size: 1.125rem;
}

.btn img {
    height: 40px;
}

/* App Storeダウンロードボタン（参考ページ風） */
.download-btn {
    display: inline-block;
    background: #fff;
    color: #3399FF;
    font-weight: bold;
    font-size: 1.2rem;
    padding: 1em 2.5em;
    border-radius: 2em;
    box-shadow: 0 2px 8px rgba(51,153,255,0.13);
    margin-top: 1.2rem;
    text-decoration: none;
    transition: background 0.2s, color 0.2s;
    border: 2px solid #fff;
}
.download-btn:hover {
    background: #3399FF;
    color: #fff;
    border: 2px solid #fff;
}

/* ----------------------------------------
   6. Header
   ---------------------------------------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
}

.navbar {
    padding: var(--spacing-md) 0;
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.logo-img {
    width: 40px;
    height: 40px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-link {
    font-weight: 500;
    color: var(--color-gray-600);
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-primary);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-black);
    transition: var(--transition-fast);
}

/* ----------------------------------------
   7. Hero Section
   ---------------------------------------- */
.hero {
    position: relative;
    padding: calc(80px + var(--spacing-xxxl)) 0 var(--spacing-xxxl);
    overflow: hidden;
    background: linear-gradient(135deg, #F0F9FF 0%, #E0F2FE 100%);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.bubble {
    position: absolute;
    border-radius: 50%;
    background: rgba(51, 153, 255, 0.1);
    animation: float 20s infinite ease-in-out;
}

.bubble-1 {
    width: 100px;
    height: 100px;
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.bubble-2 {
    width: 150px;
    height: 150px;
    top: 60%;
    right: 10%;
    animation-delay: 5s;
}

.bubble-3 {
    width: 80px;
    height: 80px;
    bottom: 20%;
    left: 30%;
    animation-delay: 10s;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxxl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    margin-bottom: var(--spacing-lg);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.coming-soon {
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.phone-mockup {
    max-width: 350px;
    margin: 0 auto;
    text-align: center;
    overflow: hidden; /* はみ出し防止 */
    border-radius: 45px; /* 外枠も角丸に */
}

.phone-frame {
    width: 100%;
    filter: drop-shadow(var(--shadow-xl));
    display: block;
}

.phone-screen {
    width: 100%;
    max-width: 350px;
    height: auto;
    border-radius: 45px; /* PC表示用に角丸を調整 */
    box-shadow: var(--shadow-xl);
    display: block;
    object-fit: cover; /* 画像を枠内に収める */
    background-color: transparent; /* 背景を透明に */
}

/* スマートフォン表示時の角丸調整 */
@media (max-width: 768px) {
    .phone-mockup {
        border-radius: 35px;
    }
    .phone-screen {
        border-radius: 35px; /* タブレットで中間値 */
    }
}

@media (max-width: 480px) {
    .phone-mockup {
        border-radius: 25px;
    }
    .phone-screen {
        border-radius: 25px; /* スマホ表示では実機に近い角丸 */
    }
}

/* iPhone実機での表示用 (Safari) */
@supports (-webkit-touch-callout: none) {
    @media (max-width: 430px) { /* iPhone Pro Max等 */
        .phone-mockup {
            border-radius: 22px;
        }
        .phone-screen {
            border-radius: 22px; /* iOS実機に最適化 */
        }
    }
}

/* ----------------------------------------
   8. Features Section
   ---------------------------------------- */
.features {
    padding: var(--spacing-xxxl) 0;
    background: var(--color-gray-100);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    background: var(--color-white);
    padding: var(--spacing-xxl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    border-radius: 50%;
}

.feature-icon img {
    width: 50px;
    height: 50px;
}

.feature-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.feature-description {
    color: var(--color-gray-600);
    line-height: 1.8;
}

/* ----------------------------------------
   9. How to Use Section
   ---------------------------------------- */
.how-to-use {
    padding: var(--spacing-xxxl) 0;
}

.steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xxl);
    position: relative;
}

.step {
    display: grid;
    grid-template-columns: auto 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.step.reverse {
    grid-template-columns: 1fr 1fr auto;
    align-items: start;
}

.step.reverse .step-number {
    grid-column: 3;
}

.step.reverse .step-content {
    grid-column: 2;
    text-align: right;
}

.step.reverse .step-image {
    grid-column: 1;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
}

.step-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.step-description {
    color: var(--color-gray-600);
    line-height: 1.8;
}

.step-image img {
    max-width: 300px;  /* 幅を小さくして背景内に収める */
    box-shadow: var(--shadow-lg);
    border-radius: 30px;  /* カスタム値 */
    padding: 20px 15px;  /* 縦20px、横15pxで調整 */
    object-fit: contain;  /* 画像の比率を保持してコンテナ内に収める */
    width: 100%;
    height: auto;
}

/* スマートフォン表示時の角丸調整 */
@media (max-width: 768px) {
    .step-image img {
        border-radius: 20px; /* モバイルでは角丸を小さく */
    }
}

@media (max-width: 480px) {
    .step-image img {
        border-radius: 15px; /* 小型スマホではさらに小さく */
    }
}

.step-arrow {
    width: 2px;
    height: 60px;
    background: var(--color-gray-200);
    margin: 0 auto;
    position: relative;
}

.step-arrow::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-top: 10px solid var(--color-gray-200);
}

/* ----------------------------------------
   10. Reviews Section
   ---------------------------------------- */
.reviews {
    padding: var(--spacing-xxxl) 0;
    background: var(--color-gray-100);
}

.reviews-carousel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.review-card {
    background: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.stars {
    color: #FFD700;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

.review-text {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    min-height: 80px;
}

.reviewer {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.reviewer-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.reviewer-name {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.reviewer-title {
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

/* ----------------------------------------
   11. Download CTA Section
   ---------------------------------------- */
.download-cta {
    padding: var(--spacing-xxxl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    text-align: center;
}

.cta-title {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

/* ----------------------------------------
   12. Footer
   ---------------------------------------- */
.footer {
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
    background: var(--color-gray-100);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
}

.footer-logo img {
    width: 32px;
    height: 32px;
}

.footer-links {
    display: flex;
    gap: var(--spacing-xl);
}

.footer-link {
    color: var(--color-gray-600);
    font-weight: 500;
}

.footer-link:hover {
    color: var(--color-primary);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-200);
    border-radius: 50%;
    transition: var(--transition-fast);
}

.social-link:hover {
    background: var(--color-primary);
    transform: translateY(-2px);
}

.social-link img {
    width: 20px;
    height: 20px;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-200);
    color: var(--color-gray-500);
    font-size: 0.875rem;
}

/* ----------------------------------------
   13. Responsive Design
   ---------------------------------------- */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text {
        order: 2;
    }
    
    .hero-image {
        order: 1;
    }
    
    .step {
        grid-template-columns: auto 1fr;
    }
    
    .step.reverse {
        grid-template-columns: auto 1fr;
    }
    
    .step.reverse .step-number {
        grid-column: 1;
    }
    
    .step.reverse .step-content {
        grid-column: 2;
        text-align: left;
    }
    
    .step-image {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .features-grid,
    .reviews-carousel {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .btn {
        font-size: 0.875rem;
        padding: var(--spacing-sm) var(--spacing-lg);
    }
    
    .btn-large {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 1rem;
    }
    
    .phone-mockup {
        max-width: 280px;
    }
    
    .step-number {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
}

/* btn-primaryのホバーを.download-btnと同じに */
.btn.btn-primary:hover, .btn.btn-large.btn-primary:hover {
    background: #fff;
    color: #3399FF;
    border: 2px solid #3399FF;
    box-shadow: 0 2px 8px rgba(51,153,255,0.13);
    transform: translateY(-2px);
    opacity: 1;
}

/* 既存の.btn-primaryのborderを追加（通常時はborderなし） */
.btn.btn-primary, .btn.btn-large.btn-primary {
    border: none;
}