@import url('https://fonts.googleapis.com/css2?family=Shippori+Mincho:wght@400;500;700&display=swap');

:root {
    --font-serif: 'Shippori Mincho', serif;

    /* Japanese Traditional Colors */
    --color-ink: #2b2b2b;
    /* Sumi */
    --color-paper: #f4f1ea;
    /* Washi */
    --color-matcha: #5d7259;
    /* Matcha */
    --color-indigo: #2e3a59;
    /* Ai */
    --color-vermilion: #b93a32;
    /* Shu */
    --color-sand: #d7cfbe;

    --spacing-sm: 1rem;
    --spacing-md: 2.5rem;
    --spacing-lg: 5rem;

    --header-height: 80px;
}

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

body {
    font-family: var(--font-serif);
    background-color: var(--color-paper);
    color: var(--color-ink);
    line-height: 1.8;
    overflow-x: hidden;
    /* Subtle paper texture pattern */
    background-image: radial-gradient(#d7cfbe 1px, transparent 1px);
    background-size: 20px 20px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.4s ease;
}

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

/* Typography Utilities */
.t-vert {
    writing-mode: vertical-rl;
    text-orientation: upright;
    letter-spacing: 0.2em;
}

.t-center {
    text-align: center;
}

.t-serif {
    font-family: var(--font-serif);
}

h1,
h2,
h3 {
    font-weight: 500;
}

/* Vertical navigation and headers require special handling */

/* Components */
.btn-wa {
    display: inline-block;
    padding: 1rem 3rem;
    border: 1px solid var(--color-ink);
    background-color: transparent;
    color: var(--color-ink);
    font-size: 0.95rem;
    letter-spacing: 0.1em;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.btn-wa::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background-color: var(--color-ink);
    transition: width 0.4s ease;
    z-index: -1;
}

.btn-wa:hover {
    color: var(--color-paper);
}

.btn-wa:hover::after {
    width: 100%;
}

.section {
    padding: 6rem 0;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: rgba(244, 241, 234, 0.9);
    backdrop-filter: blur(5px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

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

.logo-icon {
    width: 30px;
    height: 30px;
    border: 2px solid var(--color-ink);
    display: grid;
    place-items: center;
    transform: rotate(45deg);
}

.logo-icon span {
    transform: rotate(-45deg);
    font-weight: 700;
    font-size: 0.9rem;
}

.logo-text {
    font-size: 1.2rem;
    letter-spacing: 0.2em;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    font-size: 0.95rem;
    letter-spacing: 0.1em;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0%;
    height: 1px;
    background-color: var(--color-ink);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-btn {
    background-color: var(--color-vermilion);
    color: #fff;
    padding: 0.6rem 1.5rem;
    border-radius: 2px;
}

.nav-btn:hover {
    color: #fff;
    background-color: #a02e26;
}

/* Hero */
.hero {
    height: 100vh;
    position: relative;
    overflow: hidden;
    display: grid;
    place-items: center;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
    filter: brightness(0.8);
    animation: slowZoom 20s infinite alternate;
}

@keyframes slowZoom {
    from {
        transform: scale(1);
    }

    to {
        transform: scale(1.1);
    }
}

.hero-content {
    color: #fff;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: row-reverse;
    /* For vertical text layout */
    gap: 3rem;
    align-items: flex-start;
    height: 60vh;
}

.hero-title {
    font-size: 3rem;
    line-height: 1.3;
    height: 100%;
    margin: 0;
    border-right: 1px solid rgba(255, 255, 255, 0.5);
    padding-right: 2rem;
}

.hero-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    padding-top: 2rem;
}

/* Concept */
.concept {
    position: relative;
    padding: 8rem 0;
}

.concept-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.concept-text {
    padding: 2rem;
    border: 1px solid var(--color-sand);
    background-color: rgba(255, 255, 255, 0.8);
    position: relative;
}

.concept-text::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    border: 1px solid var(--color-ink);
    pointer-events: none;
}

.concept h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    letter-spacing: 0.1em;
}

/* Image Cards (Onsen, Room, Cuisine) */
.showcase-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.card {
    position: relative;
    overflow: hidden;
    overflow: hidden;
}

.card-img {
    height: 400px;
    overflow: hidden;
}

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

.card:hover .card-img img {
    transform: scale(1.05);
}

.card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: #fff;
    transform: translateY(10px);
    transition: transform 0.4s ease;
}

.card:hover .card-overlay {
    transform: translateY(0);
}

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

.card a {
    color: #fff;
    font-size: 0.8rem;
    border-bottom: 1px solid #fff;
    padding-bottom: 2px;
}

/* Page Headers */
.page-hero {
    height: 50vh;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
    margin-bottom: 4rem;
}

.page-hero img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
    filter: brightness(0.6);
}

.page-hero h1 {
    font-size: 2.5rem;
    letter-spacing: 0.2em;
    z-index: 1;
}

/* Onsen Details */
.onsen-detail {
    margin-bottom: 6rem;
}

.onsen-row {
    display: flex;
    gap: 3rem;
    margin-bottom: 3rem;
}

.onsen-row:nth-child(even) {
    flex-direction: row-reverse;
}

.onsen-img {
    flex: 1;
}

.onsen-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.onsen-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--color-matcha);
}

/* Booking */
.booking-form-wa {
    max-width: 600px;
    margin: 0 auto;
    background: #fff;
    padding: 3rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    border-top: 5px solid var(--color-vermilion);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.form-control {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--color-sand);
    background-color: var(--color-paper);
    font-family: inherit;
}

.plan-checkbox {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
}

.plan-option {
    padding: 1rem;
    border: 1px solid var(--color-sand);
    flex: 1;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.plan-option:hover,
.plan-option.selected {
    background-color: var(--color-ink);
    color: #fff;
}

/* Footer */
footer {
    background-color: var(--color-ink);
    color: rgba(255, 255, 255, 0.6);
    padding: 4rem 0;
    text-align: center;
}

.footer-logo {
    font-size: 1.5rem;
    color: #fff;
    margin-bottom: 2rem;
    letter-spacing: 0.2em;
}

/* Mobile Menu Defaults - Hidden on Desktop */
.mobile-toggle,
#mobile-menu-overlay {
    display: none;
}

/* Mobile */
@media (max-width: 768px) {
    .site-header {
        padding: 1rem;
    }

    .nav-links {
        display: none;
    }

    /* Hamburger menu TBD */
    .hero-content {
        flex-direction: column;
        height: auto;
        text-align: center;
    }

    .hero-title {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.5);
        padding-bottom: 1rem;
        margin-bottom: 1rem;
        writing-mode: horizontal-tb;
    }

    .concept-grid,
    .showcase-grid,
    .onsen-row {
        grid-template-columns: 1fr;
    }

    .t-vert {
        writing-mode: horizontal-tb;
    }

    /* Mobile Toggle */
    .mobile-toggle {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        width: 40px;
        height: 40px;
        cursor: pointer;
        z-index: 2000;
        border: 1px solid var(--color-ink);
        background-color: var(--color-paper);
    }

    .mobile-toggle .cross-line {
        position: absolute;
        width: 20px;
        height: 2px;
        background-color: var(--color-ink);
        transition: all 0.4s ease;
    }

    .mobile-toggle .cross-line:nth-child(1) {
        transform: translateY(-4px);
    }

    .mobile-toggle .cross-line:nth-child(2) {
        transform: translateY(4px);
    }

    .mobile-toggle.active .cross-line:nth-child(1) {
        transform: rotate(45deg);
    }

    .mobile-toggle.active .cross-line:nth-child(2) {
        transform: rotate(-45deg);
    }

    /* Mobile Menu Overlay */
    #mobile-menu-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background-color: var(--color-paper);
        background-image: radial-gradient(#d7cfbe 1px, transparent 1px);
        background-size: 20px 20px;
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.5s ease;
        z-index: 1500;
    }

    #mobile-menu-overlay.active {
        opacity: 1;
        pointer-events: auto;
    }

    .menu-content {
        display: flex;
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }

    .menu-content a {
        font-family: var(--font-serif);
        font-size: 2rem;
        color: var(--color-ink);
        position: relative;
    }

    .menu-content a .sub {
        display: block;
        font-size: 0.9rem;
        color: var(--color-matcha);
        letter-spacing: 0.1em;
        margin-top: 0.5rem;
    }

    .menu-btn {
        background-color: var(--color-vermilion);
        color: #fff !important;
        padding: 0.8rem 3rem;
        font-size: 1.2rem !important;
        margin-top: 1rem;
    }
}

/* Fade In Animation */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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