@charset "UTF-8";

/* ==========================================================================
   Base Styles & Variables
   ========================================================================== */
:root {
    --color-main: #323b50;
    --color-muted: #BEBEBE;
    --font-en: "Gill Sans", "Gill Sans MT", Calibri, sans-serif;
    --font-ja: "Sawarabi Gothic", sans-serif;
}

body.site-body {
    background-color: #ffffff;
    font-family: var(--font-ja);
    font-weight: 400;
    color: var(--color-main);
    margin: 0;
    padding: 0;
}

.en, .nav-text, .btn-text, .logo-link, .copyright {
    font-family: var(--font-en);
}

body.shape-page {
    overflow: hidden;
    user-select: none;
}

body.top-page {
    overflow-y: auto;
}

/* ==========================================================================
   Header & Navigation (共通)
   ========================================================================== */
.header-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 2rem;
    z-index: 20;
    pointer-events: auto;
    box-sizing: border-box;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.logo-link {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 1.5rem;
    width: auto;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 13px;
    letter-spacing: 0.1em;
    color: var(--color-main);
}

.nav-item {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.5rem;
    text-decoration: none;
    color: inherit;
    overflow: hidden;
}

.header-spacer {
    width: 180px;
}

/* Gナビおよび石ボタン共通のスライド・回転アニメーション */
.nav-text-wrapper {
    position: relative;
    display: inline-flex;
    align-items: center;
    height: 1.5em;
    padding: 0.2em 0;
    overflow: hidden;
    perspective: 400px;
    box-sizing: content-box;
}

.nav-text {
    display: block;
    white-space: nowrap;
    line-height: 1.5em;
    transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.45s ease;
    will-change: transform, opacity;
}

.nav-text-primary {
    transform: translateY(0%) rotateX(0deg);
    opacity: 1;
}

.nav-text-hover {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    transform: translateY(120%) rotateX(-45deg); 
    opacity: 0;
}

.nav-item:hover .nav-text-primary,
.stone-link:hover .nav-text-primary {
    transform: translateY(-120%) rotateX(45deg);
    opacity: 0;
}

.nav-item:hover .nav-text-hover,
.stone-link:hover .nav-text-hover {
    transform: translateY(0%) rotateX(0deg);
    opacity: 1;
}

/* ==========================================================================
   Hamburger Menu (SP共通)
   ========================================================================== */
.hamburger-btn {
    display: none;
    position: absolute;
    top: 1.6rem;
    right: 1.5rem;
    width: 60px;
    height: 12px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 60;
    pointer-events: auto;
}

.hamburger-line {
    position: absolute;
    left: 0;
    display: block;
    width: 100%;
    height: 1px;
    background-color: var(--color-main);
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), top 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.hamburger-line.line-1 {
    top: 0;
}

.hamburger-line.line-2 {
    bottom: 0;
}

.hamburger-btn.is-open .hamburger-line.line-1 {
    top: 50%;
    transform: translateY(-50%) rotate(11.4deg);
}

.hamburger-btn.is-open .hamburger-line.line-2 {
    bottom: auto;
    top: 50%;
    transform: translateY(-50%) rotate(-11.4deg);
}

.mobile-menu {
    position: fixed;
    inset: 0;
    background-color: #ffffff;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.mobile-menu.is-open {
    opacity: 1;
    pointer-events: auto;
}

.mobile-menu-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    font-size: 16px;
    letter-spacing: 0.15em;
}

.mobile-nav-item {
    color: var(--color-main);
    text-decoration: none;
}

/* ==========================================================================
   TOP Page Specific Styles
   ========================================================================== */
.fv {
    width: 100vw;
    height: 100vh;
    position: relative;
    overflow: hidden;
}

.fv-video {
    width: 100%;
    height: 100%;
    padding: 100px 8%;
    object-fit: cover;
}

.main-content {
    margin-top: 100px;
    padding: 120px 8%;
    background: #fff;
}

.content-wrapper {
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 40px;
}

.message-area {
    flex: 1;
    font-size: 16px;
    color: var(--color-main);
    line-height: 2.2;
    letter-spacing: 0.06em;
    font-family: var(--font-ja);
}

.message-area p {
    margin-bottom: 1.5rem;
}

.stones-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0px;
    padding-top: 90px;
    position: relative;
}

.stone-link {
    display: flex;
    text-decoration: none;
    background-color: transparent;
    border: 1px solid var(--color-main);
    color: var(--color-main);
    position: relative;
    transition: transform 0.3s ease, background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.stone-link .en {
    font-family: var(--font-en);
    font-size: 30px;
    letter-spacing: 0.06em;
    line-height: 1;
}

.stone-link .ja {
    font-family: var(--font-ja);
    font-size: 12px;
    color: #828282;
    transition: color 0.3s ease;
}

.text-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.text-group-row {
    display: flex;
    align-items: baseline;
    gap: 12px;
}

.arrow-icon-wrapper {
    position: relative;
    width: 24px;
    height: 24px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.arrow-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: opacity 0.3s ease;
}

.arrow-primary {
    opacity: 1;
}

.arrow-hover {
    opacity: 0;
    filter: brightness(0) invert(1);
}

.stone-shape {
    border-radius: 65% 35% 55% 45% / 50% 60% 40% 50%;
    width: 400px;
    height: 215px;
    margin-right: 0px;
    align-items: center;
    justify-content: center;
    gap: 50px;
}

.stone-pattern {
    border-radius: 40% 60% 45% 55% / 60% 40% 60% 40%;
    width: 400px;
    height: 215px;
    margin-right: 60px;
    align-items: center;
    justify-content: center;
    gap: 40px;
}

.stone-movie {
    border-radius: 50% 50% 40% 60% / 45% 55% 45% 55%;
    width: 400px;
    height: 215px;
    margin-right: 25px;
    align-items: center;
    justify-content: flex-start;
    padding-left: 55px;
    position: relative;
}

.stone-movie .arrow-icon-wrapper {
    position: absolute;
    right: 75px;
    bottom: 50px;
}

.stone-link:hover {
    background-color: var(--color-main);
    color: #ffffff;
    transform: scale(1.02);
}

.stone-link:hover .ja {
    color: #cccccc;
}

.stone-link:hover .arrow-primary {
    opacity: 0;
}

.stone-link:hover .arrow-hover {
    opacity: 1;
}

.footer {
    padding: 40px 8%;
    background: #fff;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    font-size: 12px;
    color: var(--color-main);
}

.footer-info p {
    margin-bottom: 4px;
}

.copyright {
    letter-spacing: 0.06em;
}

/* ==========================================================================
   Control Buttons (RESET, LIST, GRADIENT, PHOTO) - SHAPE & PATTERN Page
   ========================================================================== */
.control-buttons {
    position: fixed;
    top: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 1rem;
    z-index: 50;
    pointer-events: auto;
}

.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    font-size: 13px;
    letter-spacing: 0.05em;
    cursor: pointer;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    line-height: 1;
    border-radius: 0; /* 角丸なし（shape.htmlのデザインに準拠） */
}

.btn-reset {
    background-color: #ffffff;
    border: 1px solid var(--color-main);
    color: var(--color-main);
}

.btn-list {
    background-color: var(--color-main);
    color: #ffffff;
    border: 1px solid var(--color-main);
}

.btn-icon {
    width: 0.875rem;
    height: 0.875rem;
    flex-shrink: 0;
    display: block;
}

.btn-text-wrapper {
    position: relative;
    display: inline-flex;
    align-items: center;
    height: 1em;
    overflow: hidden;
    perspective: 400px;
}

.btn-text {
    display: block;
    white-space: nowrap;
    line-height: 1;
    transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.45s ease;
    will-change: transform, opacity;
}

.btn-text-primary {
    transform: translateY(0%) rotateX(0deg);
    opacity: 1;
}

.btn-text-hover {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    transform: translateY(110%) rotateX(-45deg);
    opacity: 0;
}

.btn:hover .btn-text-primary {
    transform: translateY(-110%) rotateX(45deg);
    opacity: 0;
}

.btn:hover .btn-text-hover {
    transform: translateY(0%) rotateX(0deg);
    opacity: 1;
}

/* ==========================================================================
   Main Canvas & Gallery Modal - SHAPE Page
   ========================================================================== */
.canvas-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    cursor: pointer;
}

.physics-canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.initial-hint-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

.click-here-text {
    color: var(--color-muted);
    font-size: 17px;
    letter-spacing: 0.25em;
    font-weight: 400;
}

@keyframes blinkAnimation {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.2; }
}

.animate-blink {
    animation: blinkAnimation 2s ease-in-out infinite;
}

.gallery-modal {
    position: fixed;
    inset: 0;
    background-color: rgba(255, 255, 255, 0.95);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    padding: 4rem 1.5rem 2rem 1.5rem;
    box-sizing: border-box;
}

.gallery-modal.is-open {
    opacity: 1;
    pointer-events: auto;
}

.gallery-modal-inner {
    background-color: #F0F0F0;
    width: 100%;
    max-width: 1200px;
    height: 100%;
    max-height: 85vh;
    overflow-y: auto;
    padding: 2.5rem;
    box-sizing: border-box;
    border-radius: 4px;
}

.modal-close-btn {
    position: absolute;
    top: 1.6rem;
    right: 1.5rem;
    width: 60px;
    height: 12px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 110;
    pointer-events: auto;
}

.modal-close-line {
    position: absolute;
    left: 0;
    display: block;
    width: 100%;
    height: 1px;
    background-color: var(--color-main);
}

.modal-close-line.line-1 {
    top: 50%;
    transform: translateY(-50%) rotate(11.4deg);
}

.modal-close-line.line-2 {
    bottom: auto;
    top: 50%;
    transform: translateY(-50%) rotate(-11.4deg);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
}

.stone-card {
    background-color: #ffffff;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem 1rem;
    box-sizing: border-box;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.stone-number {
    font-size: 12px;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.stone-svg-container {
    width: 100%;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.stone-meta {
    font-size: 10px;
    letter-spacing: 0.05em;
    color: var(--color-main);
    line-height: 1.5;
    width: 100%;
    padding-left: 0.25rem;
}

/* ==========================================================================
   Responsive Styles (SP View)
   ========================================================================== */
@media (max-width: 1024px) {
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .header-container {
        padding: 1.25rem 1.5rem;
    }

    .hamburger-btn {
        display: block;
    }

    .content-wrapper {
        flex-direction: column;
    }

    .stones-area {
        align-items: center;
        width: 100%;
    }

    .stone-link {
        width: 100% !important;
        max-width: 320px;
        height: 170px;
        margin-right: 0 !important;
        justify-content: space-around !important;
        padding-left: 0 !important;
    }

    .stone-movie .arrow-icon-wrapper {
        position: static !important;
    }

    .control-buttons {
        top: 4.5rem;
        width: calc(100% - 3rem);
        justify-content: space-between;
        gap: 0.75rem;
    }

    .btn {
        flex: 1;
        padding: 0.6rem 0.5rem;
        justify-content: center;
    }

    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .gallery-modal-inner {
        padding: 1rem 1rem;
    }
}

/* ==========================================================================
   PATTERN Page Specific Styles
   ========================================================================== */
.pattern-main {
    padding: 140px 5% 80px 5%;
    background-color: #ffffff;
    min-height: 100vh;
    box-sizing: border-box;
    display: flex;
    justify-content: center;
}

.pattern-grid-container {
    width: 100%;
    max-width: 1400px;
}

/* グリッドレイアウト（PC：7列） */
.pattern-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 16px;
    grid-auto-flow: dense;
}

/* 各カード（正方形を維持） */
.pattern-card {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    cursor: pointer;
    overflow: hidden;
    background-color: #f0f0f0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

/* 大きく強調するカード（2列×2行の正方形） */
.pattern-card.is-large {
    grid-column: span 2;
    grid-row: span 2;
}

/* カード内の面（写真 & グラデーション） */
.pattern-face {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: none !important;
    backface-visibility: hidden;
}

/* 初期状態：グラデーションを表示、写真を隠す */
.pattern-card .pattern-photo {
    opacity: 0;
    visibility: hidden;
    z-index: 1;
}

.pattern-card .pattern-gradient {
    opacity: 1;
    visibility: visible;
    z-index: 2;
}

/* 写真状態のクラス */
.pattern-card.is-photo .pattern-photo {
    opacity: 1;
    visibility: visible;
    z-index: 2;
}

.pattern-card.is-photo .pattern-gradient {
    opacity: 0;
    visibility: hidden;
    z-index: 1;
}

/* グラデーション状態のクラス */
.pattern-card.is-gradient .pattern-photo {
    opacity: 0;
    visibility: hidden;
    z-index: 1;
}

.pattern-card.is-gradient .pattern-gradient {
    opacity: 1;
    visibility: visible;
    z-index: 2;
}

/* レスポンシブ調整（画面幅に応じたグリッド列数変更） */
@media (max-width: 1200px) {
    .pattern-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

@media (max-width: 900px) {
    .pattern-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }
    .pattern-main {
        padding: 110px 4% 60px 4%;
    }
}

@media (max-width: 600px) {
    .pattern-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
}

/* ==========================================================================
   Page Transition (ページ遷移時のフェード効果)
   ========================================================================== */
body {
    transition: opacity 0.4s ease;
}

/* ページ遷移で暗く（白く）なるときのクラス */
body.is-fadeout {
    opacity: 0;
}