@charset "UTF-8";

/* ==========================================================================
   CSS Variables (Design System)
   ========================================================================== */
:root {
    /* Colors */
    --color-primary: #4B0082; /* 深いインディゴパープル */
    --color-secondary: #191970; /* ミッドナイトブルー */
    --color-accent: #F8BBD0; /* 桜ピンク */
    --color-silver: #C0C0C0; /* シルバー */
    --color-text-main: #333333;
    --color-text-light: #666666;
    --color-white: #FFFFFF;
    --color-bg-light: #FBFBFC; /* ほんのり紫がかった白 */
    --color-bg-gradient: linear-gradient(135deg, #FDFDFE 0%, #F5F3F7 100%);
    --color-card-bg: rgba(255, 255, 255, 0.9);
    
    /* Typography */
    --font-serif: 'Noto Serif JP', serif;
    --font-sans: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
    --font-eng: 'Cormorant Garamond', serif;
    
    /* Spacing */
    --space-xs: 8px;
    --space-s: 16px;
    --space-m: 24px;
    --space-l: 32px;
    --space-xl: 48px;
    --space-xxl: 64px;

    /* Shadow */
    --shadow-soft: 0 4px 20px rgba(75, 0, 130, 0.05);
    --shadow-strong: 0 10px 30px rgba(75, 0, 130, 0.1);
}

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

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

body {
    font-family: var(--font-serif);
    color: var(--color-text-main);
    background: var(--color-bg-light);
    line-height: 1.8;
    letter-spacing: 0.05em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    padding: 0 var(--space-m);
}

.text-content p {
    margin-bottom: var(--space-m);
}
.text-content p:last-child {
    margin-bottom: 0;
}

.mb-m { margin-bottom: var(--space-m); }
.mb-l { margin-bottom: var(--space-l); }
.mt-m { margin-top: var(--space-m); }

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4 {
    font-weight: 400;
    line-height: 1.5;
}

.section-title {
    font-size: 1.5rem;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: var(--space-xl);
    position: relative;
    padding-bottom: var(--space-m);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 1px;
    background-color: var(--color-silver);
}

.section-title .title-sub {
    display: block;
    font-size: 1rem;
    color: var(--color-text-light);
    margin-top: var(--space-xs);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn-outline {
    display: inline-block;
    padding: 12px 24px;
    border: 1px solid var(--color-white);
    color: var(--color-white);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    background: transparent;
    border-radius: 4px;
    backdrop-filter: blur(4px);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
}

.btn-primary {
    display: inline-block;
    padding: 14px 28px;
    background-color: var(--color-primary);
    color: var(--color-white);
    font-size: 0.95rem;
    letter-spacing: 0.1em;
    border-radius: 4px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(75, 0, 130, 0.2);
    width: 100%;
}

.btn-primary:hover {
    background-color: var(--color-secondary);
    box-shadow: 0 6px 20px rgba(75, 0, 130, 0.3);
    transform: translateY(-2px);
}

.btn-primary.large {
    padding: 18px 32px;
    font-size: 1rem;
}

/* ==========================================================================
   Placeholders for ungenerated images
   ========================================================================== */
.image-placeholder {
    width: 100%;
    height: 300px;
    background: linear-gradient(135deg, #EDEDF2 0%, #E3DFEB 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    border: 1px solid rgba(75, 0, 130, 0.1);
    border-radius: 8px;
}

.image-placeholder.small {
    height: 200px;
}

/* ==========================================================================
   Sections Layout
   ========================================================================== */
.section {
    padding: var(--space-xxl) 0;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background-color: var(--color-secondary);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(25,25,112,0.8) 0%, rgba(75,0,130,0.6) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--color-white);
    padding: var(--space-xl) var(--space-m);
}

.hero-image {
    width: 100%;
    max-width: 400px;
    margin: 0 auto var(--space-xl);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}

.hero-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.hero-subtitle {
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-m);
    opacity: 0.9;
}

.hero-title {
    font-size: 1.6rem;
    font-weight: 500;
    margin-bottom: var(--space-l);
    line-height: 1.6;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.hero-intro {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-bottom: var(--space-xl);
}

.hero-intro p {
    margin-bottom: var(--space-m);
}

.hero-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-s);
    max-width: 280px;
    margin: 0 auto;
}

/* Intro Section */
.intro-section {
    background: var(--color-bg-gradient);
}

/* Timing Section */
.timing-section {
    background-color: var(--color-white);
}

.timing-list {
    margin: var(--space-l) 0;
    padding: 0;
}

.timing-list li {
    position: relative;
    padding-left: 20px;
    margin-bottom: var(--space-s);
    color: var(--color-text-main);
}

.timing-list li::before {
    content: '・';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.timing-guide-box {
    background: rgba(248, 187, 208, 0.1);
    border: 1px solid rgba(75, 0, 130, 0.1);
    padding: var(--space-l);
    border-radius: 8px;
    margin-top: var(--space-xl);
}

.timing-guide-box .box-title {
    font-size: 1.2rem;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: var(--space-m);
}

.guide-list {
    margin: var(--space-m) 0;
}

.guide-list li {
    margin-bottom: var(--space-s);
    padding-bottom: var(--space-xs);
    border-bottom: 1px dashed rgba(192, 192, 192, 0.5);
}

.guide-list li span {
    color: var(--color-primary);
    font-weight: 500;
    display: block;
    font-size: 0.9rem;
}

/* Guide Section */
.guide-section {
    background: var(--color-bg-gradient);
}

.card-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-l);
}

.method-card {
    background: var(--color-card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(255, 255, 255, 0.8);
}

.method-card.premium-card {
    border: 1px solid var(--color-primary);
    box-shadow: var(--shadow-strong);
    background: linear-gradient(180deg, rgba(255,255,255,1) 0%, rgba(245,243,247,1) 100%);
}

.card-image img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.method-content {
    padding: var(--space-l);
}

.method-title {
    font-size: 1.3rem;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.purification-level {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-m);
}

.purification-level .stars {
    color: var(--color-primary);
    margin-left: 4px;
}

/* Items Section */
.items-section {
    background-color: var(--color-white);
}

.item-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    margin-bottom: var(--space-xxl);
}

.item-card {
    text-align: center;
}

.item-image {
    margin-bottom: var(--space-m);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
}

.item-image img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.item-label {
    display: inline-block;
    font-size: 0.8rem;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: var(--space-s);
}

.item-title {
    font-size: 1.4rem;
    color: var(--color-secondary);
    margin-bottom: var(--space-m);
}

.item-desc {
    font-size: 0.95rem;
    margin-bottom: var(--space-m);
    text-align: left;
}

.premium-item-card .item-title {
    color: var(--color-primary);
    font-size: 1.5rem;
}

.cta-box, .final-cta-box {
    text-align: center;
    padding: var(--space-xl) var(--space-m);
    background: rgba(75, 0, 130, 0.03);
    border-radius: 12px;
}

.cta-box .cta-title, .final-cta-box .cta-title {
    font-size: 1.3rem;
    color: var(--color-primary);
    margin-bottom: var(--space-m);
}

.cta-box .cta-text, .final-cta-box .cta-text {
    margin-bottom: var(--space-l);
}

/* Phase Section */
.phase-section {
    background: var(--color-bg-gradient);
}

.phase-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-m);
}

.phase-card {
    background: var(--color-white);
    border-radius: 8px;
    padding: var(--space-l);
    box-shadow: var(--shadow-soft);
}

.phase-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--space-m);
    padding-bottom: var(--space-s);
    border-bottom: 1px solid rgba(75, 0, 130, 0.1);
}

.phase-title {
    font-size: 1.2rem;
    color: var(--color-secondary);
}

.phase-badge {
    font-size: 0.8rem;
    color: var(--color-text-light);
}

.phase-body p {
    margin-bottom: var(--space-s);
    font-size: 0.95rem;
}

.phase-body strong {
    color: var(--color-primary);
    font-weight: 500;
}

/* Caution Section */
.caution-section {
    background-color: var(--color-white);
}

.caution-list {
    background: rgba(192, 192, 192, 0.1);
    padding: var(--space-l);
    border-radius: 8px;
}

.caution-list li {
    position: relative;
    padding-left: 20px;
    margin-bottom: var(--space-s);
}

.caution-list li::before {
    content: '×';
    position: absolute;
    left: 0;
    color: var(--color-text-light);
}

/* Message Section */
.message-section {
    background: var(--color-bg-gradient);
    text-align: center;
}

.message-section .text-content {
    text-align: left;
}

.signature {
    text-align: right;
    margin-top: var(--space-l);
    font-size: 1.2rem;
    color: var(--color-primary);
    font-family: var(--font-serif);
    font-style: italic;
}

.closing-image {
    margin: var(--space-xl) 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
}

.closing-image img {
    width: 100%;
    height: 300px;
    object-fit: cover;
}

/* Footer */
.footer {
    background-color: var(--color-secondary);
    color: var(--color-white);
    text-align: center;
    padding: var(--space-xl) 0;
}

.footer-logo {
    font-size: 1.2rem;
    letter-spacing: 0.2em;
    margin-bottom: var(--space-m);
    opacity: 0.9;
}

.footer-copy {
    font-size: 0.8rem;
    opacity: 0.5;
    font-family: var(--font-sans);
}

/* ==========================================================================
   Animations
   ========================================================================== */
/* JS有効時のみアニメーション適用（.js-loaded がbodyに付与される） */
.js-loaded .fade-in {
    opacity: 0;
    transition: opacity 1s ease-out;
}

.js-loaded .fade-in.is-visible,
.fade-in {
    opacity: 1;
}

.js-loaded .fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s ease-out, transform 1s ease-out;
}

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

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

.hero-image {
    animation: float 6s ease-in-out infinite;
}