/* ========================================
   Delta Night LP - Responsive Stylesheet
   ======================================== */

/* CSS Variables */
:root {
    --color-bg: #000000;
    --color-bg-card: #0a0a0a;
    --color-gold: #c9a868;
    --color-gold-light: #d4b87a;
    --color-gold-dark: #a88a4a;
    --color-white: #ffffff;
    --color-gray: #888888;
    --color-gray-light: #aaaaaa;
    --color-border: #333333;
    --color-red: #c94a4a;

    --font-serif: 'Cormorant Garamond', 'Times New Roman', serif;
    --font-sans: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', '��', sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
}

body {
    overflow-x: hidden;
    width: 100%;
    min-width: 0;
    max-width: 100vw;
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-white);
    line-height: 1.8;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* LINE app safe area support */
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    width: 100%;
    max-width: 100vw;
    height: 100vh;
    height: 100dvh;
    min-height: 100vh;
    min-height: 100dvh;
    /* Dynamic viewport height for mobile */
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* LINE app specific fix */
@supports (-webkit-touch-callout: none) {
    .hero {
        height: -webkit-fill-available;
        min-height: -webkit-fill-available;
    }
}

/* Formula Animation Container */
.formula-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    overflow: hidden;
    transition: transform 0.3s ease-out;
}

.formula-text {
    position: absolute;
    color: var(--color-gold);
    font-family: 'Georgia', 'Times New Roman', serif;
    font-style: italic;
    white-space: nowrap;
    animation: floatFormula 20s ease-in-out infinite;
    will-change: transform;
}

/* モバイルでは静的表示（震え防止） */
.formula-container.is-mobile .formula-text {
    animation: none;
    will-change: auto;
}

/* 静的な数式表示 */
.formula-static {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    overflow: hidden;
}

.formula-static span {
    position: absolute;
    color: var(--color-gold);
    font-family: 'Georgia', 'Times New Roman', serif;
    font-style: italic;
    font-size: 1.8rem;
    opacity: 0.20;
    white-space: nowrap;
}

@keyframes floatFormula {

    0%,
    100% {
        transform: translateY(0) translateX(0);
    }

    25% {
        transform: translateY(-20px) translateX(10px);
    }

    50% {
        transform: translateY(-10px) translateX(-10px);
    }

    75% {
        transform: translateY(-30px) translateX(5px);
    }
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at center, rgba(201, 168, 104, 0.05) 0%, transparent 70%),
        linear-gradient(180deg, #000 0%, #0a0a0a 100%);
    z-index: 0;
}

.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23c9a868' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: var(--spacing-md);
}

/* Hero Logo Image */
.hero-logo {
    max-width: 320px;
    width: 100%;
    height: auto;
    margin-bottom: var(--spacing-lg);
    filter: drop-shadow(0 0 40px rgba(201, 168, 104, 0.2));
}

/* Logo (text fallback) */
.logo {
    font-family: var(--font-serif);
    font-size: 6rem;
    font-weight: 400;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(180deg, #f5e6c8 0%, #c9a868 40%, #a88a4a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 60px rgba(201, 168, 104, 0.3);
    letter-spacing: -0.05em;
}

.logo-delta {
    font-weight: 300;
}

.logo-n {
    font-weight: 500;
}

.brand-name {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 400;
    color: var(--color-gold);
    letter-spacing: 0.3em;
    margin-bottom: var(--spacing-lg);
}

.tagline {
    font-size: 0.95rem;
    background: linear-gradient(180deg, #f5e6c8 0%, #c9a868 40%, #a88a4a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xs);
}

.main-title {
    font-size: 1.8rem;
    font-weight: 500;
    color: var(--color-white);
    letter-spacing: 0.15em;
    margin-bottom: var(--spacing-lg);
}

/* CTA Button */
.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: linear-gradient(180deg, #d4b87a 0%, #c9a868 50%, #a88a4a 100%);
    color: #000;
    text-decoration: none;
    padding: 1.2rem 3rem;
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(201, 168, 104, 0.3);
}

.cta-button .arrow {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.cta-button:hover .arrow {
    transform: translateX(4px);
}

/* ========================================
   Main Content
   ======================================== */
.main-content {
    background: var(--color-bg);
    padding: var(--spacing-xl) 0;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Section */
.section {
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 1.4rem;
    font-weight: 500;
    color: var(--color-gold);
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.section-title .important {
    color: var(--color-red);
    font-size: 0.9em;
}

/* Introduction */
.intro-text {
    font-size: 1rem;
    line-height: 2;
    margin-bottom: var(--spacing-md);
    color: var(--color-gray-light);
}

.intro-text strong {
    color: var(--color-white);
    font-weight: 500;
}

.intro-text .highlight {
    color: var(--color-gold);
}

.intro-text.thanks {
    font-size: 1.1rem;
    color: var(--color-white);
    margin-top: var(--spacing-lg);
}

/* Gold Text */
.gold {
    color: var(--color-gold);
    font-weight: 500;
}

.gold.brand {
    font-size: 1.2em;
}

/* Cards */
.card {
    display: flex;
    gap: var(--spacing-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    transition: border-color 0.3s ease;
}

.card:hover {
    border-color: var(--color-gold-dark);
}

.card-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-dark) 100%);
    color: #000;
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 600;
}

.card-content h4 {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
}

.card-content p {
    color: var(--color-gray-light);
    font-size: 0.95rem;
}

.card-content .note {
    font-size: 0.85rem;
    color: var(--color-gray);
    margin-top: var(--spacing-xs);
}

.card-ended {
    border-color: var(--color-red);
}

.card-ended .card-number {
    background: var(--color-red);
}

.ended {
    color: var(--color-red) !important;
    font-weight: 500;
}

/* Price Box */
.price-box {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    padding: var(--spacing-lg);
    text-align: center;
}

.price-box>p {
    color: var(--color-gray-light);
    margin-bottom: var(--spacing-sm);
}

.price {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    margin: var(--spacing-md) 0;
}

.price .label {
    font-size: 1rem;
    color: var(--color-gray-light);
}

.price .amount {
    font-size: 1.4rem;
    color: var(--color-white);
}

.price .yen {
    font-size: 2.8rem;
    font-weight: 500;
    color: var(--color-gold);
    font-family: var(--font-serif);
}

.price-note {
    color: var(--color-gray-light);
}

.caution {
    font-size: 0.85rem;
    color: var(--color-gray);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

/* Notice Box */
.notice-box {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-left: 3px solid var(--color-gold);
    padding: var(--spacing-md);
}

.notice-box p {
    color: var(--color-gray-light);
    line-height: 2;
}

.notice-box strong {
    color: var(--color-white);
}

.notice-box .highlight {
    color: var(--color-gold);
}

.notice-list {
    list-style: none;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.notice-list li {
    position: relative;
    padding-left: 1.5rem;
    color: var(--color-gray-light);
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
}

.notice-list li::before {
    content: ';';
    position: absolute;
    left: 0;
    color: var(--color-gold);
}

.notice-list li strong {
    color: var(--color-red);
}

/* Page Header (for sub pages) */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.back-link {
    color: var(--color-gray-light);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.back-link:hover {
    color: var(--color-gold);
}

.header-logo {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    background: linear-gradient(180deg, #f5e6c8 0%, #c9a868 40%, #a88a4a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 500;
    color: var(--color-gold);
    text-align: center;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xs);
}

.page-subtitle {
    font-size: 1rem;
    color: var(--color-gray-light);
    text-align: center;
    letter-spacing: 0.1em;
}

/* New Standard Link Box (LP) */
.new-standard-link {
    text-align: center;
}

.standard-box {
    background: var(--color-bg-card);
    border: 1px solid var(--color-gold-dark);
    padding: var(--spacing-lg);
}

.standard-title {
    font-size: 1.4rem;
    font-weight: 500;
    color: var(--color-gold);
    margin-bottom: var(--spacing-xs);
}

.standard-subtitle {
    font-size: 0.95rem;
    color: var(--color-gray-light);
    margin-bottom: var(--spacing-md);
}

.standard-desc {
    font-size: 0.9rem;
    color: var(--color-gray);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

/* Secondary CTA Button */
.cta-button.secondary {
    background: transparent;
    border: 1px solid var(--color-gold);
    color: var(--color-gold);
}

.cta-button.secondary:hover {
    background: var(--color-gold);
    color: #000;
}

/* New Standard Section */
.sub-date {
    font-size: 0.7em;
    color: var(--color-gray-light);
    font-weight: 400;
    margin-left: 0.5em;
}

.subsection-title {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-white);
    margin: var(--spacing-md) 0 var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.client-badge {
    font-size: 0.7rem;
    font-weight: 400;
    color: var(--color-gold);
    background: rgba(201, 168, 104, 0.1);
    border: 1px solid var(--color-gold-dark);
    padding: 0.2em 0.6em;
    margin-left: auto;
}

.price-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.price-grid.single {
    grid-template-columns: 1fr;
}

.price-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
}

.price-item.wide {
    grid-column: 1 / -1;
}

.price-grid .price-label {
    font-size: 0.85rem;
    color: var(--color-gray-light);
}

.price-grid .price-value {
    font-size: 1.2rem;
    color: var(--color-white);
}

.price-grid .price-value .yen {
    font-size: 2.2rem;
    font-weight: 500;
    color: var(--color-gold);
    font-family: var(--font-serif);
}

.note-small {
    font-size: 0.8rem;
    color: var(--color-gray);
    margin: var(--spacing-xs) 0 var(--spacing-sm);
    line-height: 1.6;
}

.note-small.center {
    text-align: center;
}

.option-table {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    margin-bottom: var(--spacing-sm);
}

.option-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.option-row:last-child {
    border-bottom: none;
}

.option-name {
    font-size: 0.9rem;
    color: var(--color-gray-light);
}

.option-price {
    font-size: 0.95rem;
    color: var(--color-gold);
    font-weight: 500;
}

.rule-box {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-left: 3px solid var(--color-gold);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.rule-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.rule-list li {
    position: relative;
    padding-left: 1.2rem;
    color: var(--color-gray-light);
    margin-bottom: 0.6rem;
    font-size: 0.9rem;
    line-height: 1.6;
}

.rule-list li::before {
    content: '●';
    position: absolute;
    left: 0;
    color: var(--color-gold);
    font-size: 0.5rem;
    top: 0.4em;
}

.rule-list li strong {
    color: var(--color-white);
}

.rule-list li strong.highlight {
    color: var(--color-gold);
}

.rule-note {
    font-size: 0.85rem;
    color: var(--color-gray);
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

/* Responsive for New Standard Section */
@media (max-width: 480px) {
    .price-grid {
        grid-template-columns: 1fr;
    }

    .subsection-title {
        flex-direction: column;
        align-items: flex-start;
    }

    .client-badge {
        margin-left: 0;
        margin-top: 0.3rem;
    }

    .option-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.3rem;
    }
}

/* Closing Section */
.closing {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.closing .section-title {
    border-bottom: none;
    padding-bottom: 0;
}

.closing-content p {
    color: var(--color-gray-light);
    line-height: 2.2;
    margin-bottom: var(--spacing-md);
}

.closing-content strong {
    color: var(--color-white);
}

.closing-content .final {
    font-size: 1.1rem;
    color: var(--color-white);
    margin-top: var(--spacing-lg);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: #050505;
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.footer-logo {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    background: linear-gradient(180deg, #f5e6c8 0%, #c9a868 40%, #a88a4a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.copyright {
    font-size: 0.8rem;
    color: var(--color-gray);
    letter-spacing: 0.15em;
}

/* ========================================
   Responsive Design
   ======================================== */

/* Tablet */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 3rem;
        --spacing-lg: 2rem;
    }

    .hero-logo {
        max-width: 260px;
    }

    .logo {
        font-size: 4.5rem;
    }

    .brand-name {
        font-size: 1.5rem;
        letter-spacing: 0.2em;
    }

    .main-title {
        font-size: 1.4rem;
    }

    .cta-button {
        padding: 1rem 2rem;
        font-size: 0.9rem;
    }

    .section-title {
        font-size: 1.2rem;
    }

    .card {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .card-number {
        width: 32px;
        height: 32px;
        font-size: 1.5rem;
    }

    .price .yen {
        font-size: 2.4rem;
    }
}

/* Mobile */
@media (max-width: 480px) {
    :root {
        --spacing-xl: 2.5rem;
        --spacing-lg: 1.5rem;
        --spacing-md: 1rem;
        /* グレーを明るく（可読性向上） */
        --color-gray: #a0a0a0;
        --color-gray-light: #c8c8c8;
    }

    body {
        font-size: 14px;
    }

    .hero-logo {
        max-width: 200px;
    }

    .logo {
        font-size: 3.5rem;
    }

    .brand-name {
        font-size: 1.2rem;
        letter-spacing: 0.15em;
    }

    .tagline {
        font-size: 0.85rem;
    }

    .main-title {
        font-size: 1.2rem;
        letter-spacing: 0.1em;
    }

    .cta-button {
        padding: 0.9rem 1.5rem;
        font-size: 0.85rem;
        width: 100%;
        justify-content: center;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .section-title {
        font-size: 1.1rem;
    }

    .intro-text {
        font-size: 0.95rem;
    }

    .intro-text br {
        display: none;
    }

    .card-content h4 {
        font-size: 1rem;
    }

    .price-box {
        padding: var(--spacing-md);
    }

    .price .amount {
        font-size: 1.2rem;
    }

    .price .yen {
        font-size: 2.2rem;
    }

    .notice-box p br {
        display: none;
    }

    .closing-content p br {
        display: none;
    }

    .footer-logo {
        font-size: 2rem;
    }
}

/* Very small screens */
@media (max-width: 360px) {
    .hero-logo {
        max-width: 160px;
    }

    .logo {
        font-size: 3rem;
    }

    .brand-name {
        font-size: 1rem;
    }

    .main-title {
        font-size: 1rem;
    }
}

/* Smooth animations */
@media (prefers-reduced-motion: no-preference) {
    .card {
        transition: border-color 0.3s ease, transform 0.3s ease;
    }

    .card:hover {
        transform: translateX(4px);
    }

    .section {
        animation: fadeInUp 0.6s ease forwards;
        opacity: 0;
    }

    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(20px);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .section:nth-child(1) {
        animation-delay: 0.1s;
    }

    .section:nth-child(2) {
        animation-delay: 0.2s;
    }

    .section:nth-child(3) {
        animation-delay: 0.3s;
    }

    .section:nth-child(4) {
        animation-delay: 0.4s;
    }

    .section:nth-child(5) {
        animation-delay: 0.5s;
    }

    .section:nth-child(6) {
        animation-delay: 0.6s;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-gold: #ffd700;
        --color-border: #555555;
    }

    .card,
    .price-box,
    .notice-box {
        border-width: 2px;
    }
}

/* Section Description */
.section-desc {
    font-size: 0.9rem;
    color: var(--color-gray);
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

/* Highlight Price Item */
.price-item.highlight-price {
    border-color: var(--color-gold-dark);
    background: linear-gradient(180deg, rgba(201, 168, 104, 0.1) 0%, rgba(10, 10, 10, 1) 100%);
}

.price-item.highlight-price .price-value .yen {
    font-size: 2.8rem;
}

/* Print styles */
@media print {
    .hero {
        min-height: auto;
        padding: 2rem;
    }

    .hero-bg {
        display: none;
    }

    .cta-button {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    .gold,
    .section-title {
        color: #8B7355;
    }
}