/* Reset & Variables */
:root {
    --color-primary: #0F172A;
    --color-secondary: #94A3B8;
    --color-accent: #C5A059;
    --color-text: #F8FAFC;
    --color-bg: #020617;
    --color-bg-light: #1E293B;

    --font-heading-en: 'Montserrat', sans-serif;
    --font-heading-jp: 'Noto Serif JP', serif;
    --font-body: 'Zen Kaku Gothic New', sans-serif;

    --transition: all 0.4s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.8;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* Typography */
h1,
h2,
h3 {
    font-family: var(--font-heading-jp);
    font-weight: 400;
    letter-spacing: 0.1em;
}

.section-subtitle {
    font-family: var(--font-heading-en);
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-size: 0.9rem;
    display: block;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.btn-nav {
    background-color: var(--color-accent);
    color: var(--color-bg);
    padding: 0.5rem 1.5rem;
    border-radius: 2px;
    font-weight: 500;
}

.btn-nav:hover {
    background-color: #fff;
}

.btn-outline {
    display: inline-block;
    border: 1px solid var(--color-text);
    padding: 0.8rem 2rem;
    margin-top: 1.5rem;
    font-family: var(--font-heading-en);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
}

.btn-outline:hover {
    background-color: var(--color-text);
    color: var(--color-bg);
}

.btn-primary {
    display: inline-block;
    background-color: var(--color-accent);
    color: var(--color-bg);
    padding: 1rem 3rem;
    font-size: 1.1rem;
    margin: 1rem;
    border: 1px solid var(--color-accent);
}

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

.btn-secondary {
    display: inline-block;
    background-color: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-text);
    padding: 1rem 3rem;
    font-size: 1.1rem;
    margin: 1rem;
}

.btn-secondary:hover {
    background-color: var(--color-text);
    color: var(--color-bg);
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: var(--transition);
}

header.scrolled {
    background-color: rgba(2, 6, 23, 0.9);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    color: var(--color-accent);
    font-size: 1.2rem;
}

.logo-text {
    font-family: var(--font-heading-jp);
    font-size: 1.5rem;
    letter-spacing: 0.1em;
}

.logo-sub {
    font-family: var(--font-heading-en);
    font-size: 0.8rem;
    margin-left: 0.5rem;
    opacity: 0.8;
}

.nav-menu ul {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    font-family: var(--font-heading-jp);
    font-size: 0.95rem;
}

.nav-menu a:not(.btn-nav):hover {
    color: var(--color-accent);
}

.hamburger {
    display: none;
    cursor: pointer;
}

/* Hero Section */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.5)), url('images/hero_bg.png');
    background-size: cover;
    background-position: center;
    z-index: -1;
    /* Parallax effect handled by JS or fixed attachment if simple */
    /* background-attachment: fixed; */
    /* Mobile support varies, JS preferred for smooth parallax */
}

.hero-content {
    z-index: 1;
}

.hero-title {
    font-size: 4rem;
    line-height: 1.4;
    margin-bottom: 2rem;
    letter-spacing: 0.1em;
    font-weight: 700;
    /* 3D Text Effect */
    color: #fff;
    text-shadow:
        0 1px 0 #999,
        0 2px 0 #888,
        0 3px 0 #777,
        0 4px 0 #666,
        0 5px 0 #555,
        0 6px 1px rgba(0, 0, 0, .2),
        0 0 5px rgba(0, 0, 0, .2),
        0 1px 3px rgba(0, 0, 0, .4),
        0 3px 5px rgba(0, 0, 0, .3),
        0 5px 10px rgba(0, 0, 0, .35),
        0 10px 10px rgba(0, 0, 0, .3),
        0 20px 20px rgba(0, 0, 0, .25);
}

.hero-subtitle {
    font-family: var(--font-heading-en);
    font-size: 1.2rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-accent);
}

.scroll-down {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-heading-en);
    font-size: 0.8rem;
    opacity: 0.8;
    animation: bounce 2s infinite;
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    40% {
        transform: translateX(-50%) translateY(-10px);
    }

    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Sections General */
.section {
    padding: 8rem 0;
}

/* Concept */
.concept {
    background-color: var(--color-bg);
    position: relative;
}

.concept .container {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 4rem;
}

.vertical-text {
    writing-mode: vertical-rl;
    text-orientation: upright;
    letter-spacing: 0.3em;
}

.concept-content {
    max-width: 600px;
    padding-top: 4rem;
}

.concept-text {
    font-size: 1.1rem;
    line-height: 2.2;
}

/* Rooms */
.rooms {
    background-color: var(--color-bg-light);
    overflow: hidden;
    /* Prevent horizontal scroll on body */
}

.rooms .section-desc {
    font-size: 1.3rem;
    /* サイズアップ */
}

.rooms .center-align {
    margin-bottom: 2rem;
    /* 4remから縮小 */
}

.center-align {
    text-align: center;
    margin-bottom: 4rem;
}

.section-desc {
    color: var(--color-secondary);
    margin-top: 1rem;
}

.rooms-scroller {
    display: flex;
    overflow-x: auto;
    gap: 3rem;
    /* Increase gap for expansion */
    padding: 1rem 5vw 4rem 5vw;
    /* Increase padding to prevent clipping of scaled cards */
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    /* Firefox */
    -ms-overflow-style: none;
    /* IE/Edge */
    cursor: grab;
}

.rooms-scroller::-webkit-scrollbar {
    display: none;
    /* Chrome/Safari */
}

.rooms-scroller:active {
    cursor: grabbing;
}

.room-card-vertical {
    flex: 0 0 400px;
    /* PC width */
    background-color: var(--color-bg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    scroll-snap-align: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    /* Bouncy transition */
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

.room-card-vertical:hover {
    transform: scale(1.2);
    /* Scale the whole card */
    z-index: 10;
    /* Bring to front */
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
}

.room-card-vertical .room-image {
    height: 250px;
    width: 100%;
    overflow: hidden;
}

.room-card-vertical .room-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.room-card-vertical:hover .room-image img {
    transform: scale(1.1);
    /* Subtle inner zoom */
}

.room-card-vertical .room-info {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    flex-grow: 1;
}

.room-card-vertical h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-accent);
}

.room-desc {
    font-size: 0.95rem;
    color: var(--color-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.btn-text {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-heading-en);
    font-size: 0.9rem;
    color: var(--color-text);
    margin-top: auto;
    width: fit-content;
}

.btn-text:hover {
    color: var(--color-accent);
}

.btn-text i {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.btn-text:hover i {
    transform: translateX(5px);
}

.scroll-indicator {
    width: 200px;
    height: 2px;
    background-color: rgba(148, 163, 184, 0.3);
    /* var(--color-secondary) with opacity */
    margin: 2rem auto 0;
    position: relative;
    border-radius: 2px;
    overflow: hidden;
    opacity: 0.8;
}

.scroll-indicator .bar {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background-color: var(--color-accent);
    width: 0;
    /* JS handled */
    transform: translateX(0);
    /* JS handled */
    will-change: transform, width;
}

.scroll-indicator .bar::after {
    content: none;
}

.scroll-indicator span {
    display: none;
}

/* @keyframes scroll-bar removed */

@keyframes scroll-bar {
    0% {
        left: -30%;
    }

    100% {
        left: 100%;
    }
}

@media (max-width: 768px) {
    .rooms-scroller {
        padding: 2rem 2rem;
    }

    .room-card-vertical {
        flex: 0 0 85vw;
        /* Mobile width */
    }
}

/* Onsen */
.onsen {
    background-color: var(--color-bg);
}

/* Onsen */
.onsen {
    background-color: var(--color-bg);
    /* Shared styles for scroller are used (defined in Rooms section) */
}

/* Dining */
.dining {
    background-color: var(--color-bg-light);
    text-align: center;
}

/* Dining */
.dining {
    background-color: var(--color-bg-light);
    /* Shared styles for scroller are used (defined in Rooms section) */
}

#dining .room-card-vertical .room-image img {
    transition: transform 0.3s ease;
}

/* Activity */
.activity {
    background-color: var(--color-bg);
}

/* Facilities */
.facilities {
    background-color: var(--color-bg-light);
    /* Shared styles for scroller are used */
}

/* Reservation */
.reservation {
    position: relative;
    padding: 10rem 0;
    text-align: center;
    background-image: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('images/hero_bg.png');
    /* Reuse hero bg or different one */
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.reservation h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.reservation p {
    font-size: 1.2rem;
    margin-bottom: 3rem;
}

/* Access */
.access {
    background-color: var(--color-bg);
}

.access-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.access-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.address {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.access-list li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.access-list i {
    color: var(--color-accent);
    width: 20px;
}

.map-placeholder {
    width: 100%;
    height: 400px;
    background-color: var(--color-bg-light);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--color-secondary);
    border: 1px solid var(--color-secondary);
}

.map-placeholder i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* Footer */
footer {
    background-color: #000;
    padding: 4rem 0 2rem;
    text-align: center;
}

.footer-logo {
    font-family: var(--font-heading-jp);
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--color-accent);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

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

.footer-social {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.footer-social a {
    font-size: 1.5rem;
}

.copyright {
    color: var(--color-secondary);
    font-size: 0.8rem;
    font-family: var(--font-heading-en);
}

/* Animations */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.fade-in {
    opacity: 0;
    transition: all 1s ease;
}

.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 {
    transition-delay: 0.2s;
}

.delay-2 {
    transition-delay: 0.4s;
}

.delay-3 {
    transition-delay: 0.6s;
}

.delay-4 {
    transition-delay: 0.8s;
}

.delay-5 {
    transition-delay: 1.0s;
}

/* Responsive */
@media (max-width: 768px) {
    .header-container {
        padding: 0 1.5rem;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background-color: var(--color-bg);
        display: flex;
        flex-direction: column;
        justify-content: center;
        transition: 0.4s ease;
        padding-top: 4rem;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu ul {
        flex-direction: column;
        gap: 2rem;
    }

    .hamburger {
        display: block;
        z-index: 1001;
    }

    .hamburger span {
        display: block;
        width: 25px;
        height: 2px;
        background-color: var(--color-text);
        margin: 5px 0;
        transition: 0.4s;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 5px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -5px);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .concept .container {
        flex-direction: column;
        gap: 2rem;
    }

    .vertical-text {
        writing-mode: horizontal-tb;
        text-align: center;
        width: 100%;
        margin-bottom: 2rem;
    }

    .room-card {
        grid-template-columns: 1fr;
    }

    .room-image {
        height: 300px;
    }

    .room-info {
        padding: 2rem;
    }

    .onsen-card {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .onsen-info {
        text-align: left;
        order: 2;
    }

    .onsen-image {
        order: 1;
    }

    .access-content {
        grid-template-columns: 1fr;
    }
}

/* Loading Screen */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #000;
    z-index: 99999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 1.5s cubic-bezier(0.77, 0, 0.175, 1), visibility 1.5s ease;
    overflow: hidden;
}

#loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loading-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, #1a2236 0%, #000000 70%);
    opacity: 0.8;
}

/* Star field using box-shadow */
.stars,
.stars2 {
    position: absolute;
    top: 0;
    left: 0;
    width: 2px;
    height: 2px;
    background: transparent;
    animation: twinkle 3s infinite alternate;
}

.stars {
    box-shadow:
        10vw 10vh #fff, 20vw 40vh #fff, 30vw 80vh #fff, 40vw 20vh #fff,
        50vw 50vh #fff, 60vw 30vh #fff, 70vw 90vh #fff, 80vw 60vh #fff,
        90vw 10vh #fff, 15vw 70vh #fff, 35vw 30vh #fff, 55vw 80vh #fff,
        75vw 20vh #fff, 95vw 50vh #fff, 5vw 90vh #fff, 25vw 15vh #fff,
        45vw 60vh #fff, 65vw 40vh #fff, 85vw 75vh #fff, 50vw 10vh #fff;
    animation-duration: 2s;
}

.stars2 {
    box-shadow:
        5vw 5vh 1px #8a8a8a, 15vw 25vh 1px #8a8a8a, 25vw 45vh 1px #8a8a8a,
        35vw 65vh 1px #8a8a8a, 45vw 85vh 1px #8a8a8a, 55vw 15vh 1px #8a8a8a,
        65vw 35vh 1px #8a8a8a, 75vw 55vh 1px #8a8a8a, 85vw 75vh 1px #8a8a8a,
        95vw 95vh 1px #8a8a8a, 10vw 80vh 1px #8a8a8a, 80vw 10vh 1px #8a8a8a;
    width: 1px;
    height: 1px;
    animation-duration: 4s;
    animation-delay: 1s;
}

@keyframes twinkle {
    0% {
        opacity: 0.3;
    }

    100% {
        opacity: 1;
    }
}

.loading-logo {
    text-align: center;
    color: var(--color-accent);
    opacity: 0;
    transform: scale(0.9);
    animation: logoReveal 3s ease forwards;
    position: relative;
    z-index: 10;
}

.loading-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 0 10px rgba(197, 160, 89, 0.5));
}

.loading-text {
    font-family: var(--font-heading-jp);
    font-size: 3rem;
    letter-spacing: 0.2em;
    display: block;
    margin-bottom: 0.5rem;
}

.loading-sub {
    font-family: var(--font-heading-en);
    font-size: 0.9rem;
    display: block;
    letter-spacing: 0.5em;
    color: var(--color-text);
    opacity: 0.8;
}

@keyframes logoReveal {
    0% {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
        filter: blur(10px);
    }

    30% {
        opacity: 1;
        transform: scale(1) translateY(0);
        filter: blur(0);
    }

    80% {
        opacity: 1;
        transform: scale(1);
    }

    100% {
        opacity: 0;
        transform: scale(1.1);
        filter: blur(5px);
    }
}