/* ===================================
   清泉寮スキープラン - モダン白黒デザイン
   =================================== */

/* === CSS Variables === */
:root {
    /* Colors */
    --color-black: #1a1a1a;
    --color-gray-900: #2d2d2d;
    --color-gray-800: #404040;
    --color-gray-700: #595959;
    --color-gray-500: #808080;
    --color-gray-300: #cccccc;
    --color-gray-200: #e6e6e6;
    --color-gray-100: #f0f0f0;
    --color-white: #ffffff;
    --color-accent: #00bcd4;
    --color-accent-dark: #0097a7;
    
    /* Typography */
    --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Space Mono', monospace;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    
    /* Layout */
    --container-max: 1200px;
    --container-padding: 1.25rem;
    
    /* Transitions */
    --transition: 0.2s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--color-black);
    background: var(--color-white);
    line-height: 1.6;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.75em;
}

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); }
h4 { font-size: 1.125rem; }

p {
    margin-bottom: 1em;
    line-height: 1.7;
}

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

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

/* === Utilities === */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-black);
    color: var(--color-white);
    padding: var(--space-sm);
    z-index: 10000;
}

.skip-link:focus {
    top: 0;
}

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

.section {
    padding: var(--space-xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-lg);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.section-intro {
    text-align: center;
    color: var(--color-gray-700);
    margin-bottom: var(--space-lg);
    font-size: 0.95rem;
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    font-weight: 600;
    font-size: 0.95rem;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    min-height: 48px;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
}

.btn-outline {
    background: transparent;
    color: var(--color-black);
    border-color: var(--color-black);
}

.btn-outline:hover {
    background: var(--color-black);
    color: var(--color-white);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-lg {
    padding: 1.125rem 2.5rem;
    font-size: 1.05rem;
}

/* === Header === */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    padding: var(--space-sm) 0;
}

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

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.header-phone {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 700;
}

.header-phone i {
    color: var(--color-accent);
}

/* === Hero === */
.hero {
    position: relative;
    min-height: 75vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--color-black);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 700px;
}

.hero-title {
    color: var(--color-white);
    margin-bottom: var(--space-md);
    line-height: 1.1;
}

.title-line {
    display: block;
}

.title-line.accent {
    color: var(--color-accent);
}

.hero-subtitle {
    color: var(--color-gray-300);
    font-size: 1.05rem;
    margin-bottom: var(--space-lg);
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

/* === Highlights === */
.highlights {
    background: var(--color-gray-100);
    padding: var(--space-lg) 0;
}

.highlights-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.highlight-item {
    text-align: center;
    padding: var(--space-md);
}

.highlight-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--space-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-white);
    border: 2px solid var(--color-accent);
    font-size: 1.5rem;
    color: var(--color-accent);
}

.highlight-item h3 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.highlight-item p {
    font-size: 0.875rem;
    color: var(--color-gray-700);
    margin: 0;
}

/* === Family Features === */
.feature-cards {
    display: grid;
    gap: var(--space-lg);
}

.feature-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    overflow: hidden;
}

.feature-image {
    aspect-ratio: 4/3;
    overflow: hidden;
    background: var(--color-gray-100);
}

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

.feature-content {
    padding: var(--space-md);
}

.feature-content h3 {
    margin-bottom: 0.5rem;
}

.feature-content p {
    color: var(--color-gray-700);
    font-size: 0.95rem;
    margin: 0;
}

/* === Plans === */
.plans {
    background: var(--color-gray-100);
}

.plans-grid {
    display: grid;
    gap: var(--space-md);
}

.plan-card {
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    padding: var(--space-lg);
    position: relative;
    transition: var(--transition);
}

.plan-card.featured {
    border-color: var(--color-accent);
}

.plan-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--color-accent);
    color: var(--color-white);
    padding: 0.375rem 1rem;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.plan-header {
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-gray-200);
}

.plan-header h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.plan-price {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.price-amount {
    font-size: 2rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-accent);
}

.price-unit {
    font-size: 0.875rem;
    color: var(--color-gray-700);
}

.plan-price-note {
    font-size: 0.75rem;
    color: var(--color-gray-500);
    margin-top: 0.25rem;
    margin-bottom: 0;
}

.plan-features {
    list-style: none;
    margin-bottom: var(--space-md);
}

.plan-features li {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.5rem 0;
    font-size: 0.95rem;
}

.plan-features i {
    color: var(--color-accent);
    font-size: 0.875rem;
    flex-shrink: 0;
}

.plan-details {
    margin-bottom: var(--space-md);
}

.plan-period {
    font-size: 0.85rem;
    color: var(--color-gray-600);
    margin: 0;
    padding: 0.5rem 0;
}

.plan-note {
    text-align: center;
    margin-top: var(--space-lg);
    padding: var(--space-md);
    background: var(--color-gray-100);
    border-left: 3px solid var(--color-accent);
}

.plan-note p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--color-gray-700);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.plan-note i {
    color: var(--color-accent);
}


/* === 追加プラン折りたたみ === */
.plan-toggle {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    margin: var(--space-md) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--color-gray-100);
    border: 1px solid var(--color-gray-300);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-gray-800);
    transition: var(--transition);
}

.plan-toggle:hover {
    background: var(--color-gray-200);
}

.plan-toggle i {
    transition: transform var(--transition);
    color: var(--color-accent);
}

.plan-toggle[aria-expanded="true"] i {
    transform: rotate(180deg);
}

.plan-additional {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background: var(--color-gray-50, #fafafa);
    border: 1px solid var(--color-gray-200);
    border-top: none;
}

.plan-toggle[aria-expanded="true"] + .plan-additional {
    max-height: 300px;
}

.additional-plan-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--color-gray-200);
}

.additional-plan-item:last-of-type {
    border-bottom: none;
}

.additional-plan-name {
    font-size: 0.9rem;
    color: var(--color-gray-800);
}

.additional-plan-price {
    font-size: 1.1rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-accent);
}

.additional-plan-note {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.75rem;
    color: var(--color-gray-500);
    margin: 0;
    text-align: center;
    background: var(--color-white);
}

/* === Resorts === */
.resort-map {
    margin-bottom: var(--space-xl);
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

.resort-map img {
    max-width: 700px;
    width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.resorts-grid {
    display: grid;
    gap: var(--space-md);
}

.resort-card {
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    padding: var(--space-lg);
    transition: var(--transition);
}

.resort-card.featured {
    border-color: var(--color-accent);
    position: relative;
}

.resort-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--color-accent);
    color: var(--color-white);
    padding: 0.375rem 1rem;
    font-size: 0.75rem;
    font-weight: 700;
}

.resort-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.resort-card h3 a {
    color: var(--color-black);
    transition: var(--transition);
}

.resort-card h3 a:hover {
    color: var(--color-accent);
}

.resort-distance {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-gray-700);
    font-size: 0.95rem;
    margin-bottom: var(--space-sm);
}

.resort-distance i {
    color: var(--color-accent);
}

.resort-detail {
    padding-top: var(--space-sm);
    border-top: 1px solid var(--color-gray-200);
}

.resort-benefit {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--color-gray-100);
    padding: 0.625rem var(--space-sm);
    margin-bottom: var(--space-sm);
    font-size: 0.875rem;
    font-weight: 600;
}

.resort-benefit i {
    color: var(--color-accent);
}

.resort-info {
    font-size: 0.9rem;
    color: var(--color-gray-700);
    margin-bottom: var(--space-sm);
}

.resort-contact {
    font-size: 0.85rem;
    color: var(--color-gray-500);
    line-height: 1.6;
    margin: 0;
}

/* === After Ski Experience === */
.after-ski {
    background: var(--color-gray-100);
}

.experience-cards {
    display: grid;
    gap: var(--space-xl);
}

.experience-card {
    background: var(--color-white);
    overflow: hidden;
    border: 1px solid var(--color-gray-200);
}

.experience-image {
    aspect-ratio: 4/3;
    overflow: hidden;
    background: var(--color-gray-100);
}

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

.experience-content {
    padding: var(--space-lg);
}

.experience-content h3 {
    margin-bottom: 0.75rem;
}

.experience-content p {
    color: var(--color-gray-700);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.experience-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--color-accent);
    color: var(--color-white);
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.experience-tag i {
    font-size: 1rem;
}

/* === Testimonials === */
.testimonials {
    background: var(--color-gray-100);
}

.testimonials-grid {
    display: grid;
    gap: var(--space-md);
}

.testimonial-card {
    background: var(--color-white);
    padding: var(--space-lg);
    border-left: 3px solid var(--color-accent);
}

.testimonial-rating {
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
    font-size: 0.875rem;
}

.testimonial-text {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: var(--space-md);
    color: var(--color-gray-800);
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.testimonial-author strong {
    font-size: 0.95rem;
}

.testimonial-author span {
    font-size: 0.875rem;
    color: var(--color-gray-700);
}

/* === FAQ === */
.faq-list {
    display: grid;
    gap: var(--space-sm);
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--color-gray-200);
    background: var(--color-white);
}

.faq-question {
    width: 100%;
    padding: var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-sm);
    text-align: left;
    font-weight: 600;
    font-size: 0.95rem;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--color-gray-100);
}

.faq-question i {
    flex-shrink: 0;
    transition: transform var(--transition);
    color: var(--color-accent);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 var(--space-md) var(--space-md);
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--color-gray-800);
}

.faq-contact {
    text-align: center;
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-gray-200);
}

.faq-contact p {
    margin-bottom: var(--space-md);
    color: var(--color-gray-700);
}

/* === CTA Section === */
.cta-section {
    background: var(--color-black);
    color: var(--color-white);
    padding: var(--space-2xl) 0;
    text-align: center;
}

.cta-content h2 {
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

.cta-content p {
    color: var(--color-gray-300);
    margin-bottom: var(--space-lg);
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
    margin-bottom: var(--space-md);
}

.cta-section .btn-outline {
    color: var(--color-white);
    border-color: var(--color-white);
}

.cta-section .btn-outline:hover {
    background: var(--color-white);
    color: var(--color-black);
}

.cta-note {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin: 0;
}

/* === Footer === */
.footer {
    background: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: var(--space-xl) 0 var(--space-lg);
}

.footer-content {
    display: grid;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.footer-section h3,
.footer-section h4 {
    color: var(--color-white);
    font-size: 1rem;
    margin-bottom: var(--space-sm);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--color-gray-300);
    font-size: 0.95rem;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--color-accent);
}

.footer-section address {
    font-style: normal;
    line-height: 1.8;
    font-size: 0.95rem;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-gray-800);
    color: var(--color-gray-500);
    font-size: 0.875rem;
}

/* === Floating CTA === */
.floating-cta {
    position: fixed;
    bottom: var(--space-md);
    right: var(--space-md);
    z-index: 999;
    background: var(--color-accent);
    color: var(--color-white);
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}

.floating-cta.visible {
    opacity: 1;
    visibility: visible;
}

.floating-cta:hover {
    background: var(--color-accent-dark);
    transform: translateY(-2px);
}

.floating-cta i {
    font-size: 1.25rem;
}

.floating-cta span {
    font-size: 0.625rem;
    font-weight: 700;
}

/* === Responsive === */

/* Small Mobile */
@media (max-width: 374px) {
    .highlights-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }
}

/* Mobile */
@media (min-width: 480px) {
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Tablet */
@media (min-width: 768px) {
    :root {
        --container-padding: 2rem;
        --space-xl: 4rem;
        --space-2xl: 6rem;
    }
    
    .section {
        padding: var(--space-2xl) 0;
    }
    
    .highlights-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .plans-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonials-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .resorts-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .experience-card {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0;
    }
    
    .experience-card.reverse .experience-image {
        order: 2;
    }
    
    .experience-content {
        display: flex;
        flex-direction: column;
        justify-content: center;
        padding: var(--space-xl);
    }
}

/* Desktop */
@media (min-width: 1024px) {
    .hero {
        min-height: 85vh;
    }
    
    .cta-buttons .btn {
        min-width: 200px;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* === Image Carousel === */
.carousel-section {
    padding: 0;
    margin: 0;
    background: var(--color-white);
}

.carousel-section .container {
    max-width: 100%;
    padding: 0;
}

.ski-carousel {
    width: 100%;
    max-width: 840px;  /* 1400の3/5（約60%） */
    margin: 0 auto;
    aspect-ratio: 3 / 2;
}

.ski-carousel .swiper-slide {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-white);
}

.ski-carousel .swiper-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Responsive */
@media (max-width: 768px) {
    .ski-carousel {
        aspect-ratio: 3 / 2;
    }
}

@media (max-width: 480px) {
    .ski-carousel {
        aspect-ratio: 3 / 2;
    }
}

/* Print */
@media print {
    .header,
    .floating-cta,
    .btn {
        display: none;
    }
    
    body {
        font-size: 12pt;
    }
}