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

:root {
    --color-white: #FFFFFF;
    --color-off-white: #F5F5F0;
    --color-gray: #EBEBЕ6;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-khaki: #8B7355;
    --color-khaki-light: #F2EDE4;
    --color-charcoal: #4A4A4A;
    --font: 'Noto Sans JP', sans-serif;
    --radius: 8px;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
    --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    color: var(--color-text);
    background: var(--color-white);
    line-height: 1.7;
    font-size: 16px;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

.section { padding: 80px 0; }
.bg-gray { background: #F0EFEA; }
.bg-khaki-light { background: var(--color-khaki-light); }

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-family: var(--font);
    font-weight: 700;
    font-size: 15px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition);
}

.btn-primary {
    background: var(--color-khaki);
    color: var(--color-white);
    border-color: var(--color-khaki);
}
.btn-primary:hover {
    background: #7a6448;
    border-color: #7a6448;
}

.btn-outline {
    background: transparent;
    color: var(--color-charcoal);
    border-color: var(--color-charcoal);
}
.btn-outline:hover {
    background: var(--color-charcoal);
    color: var(--color-white);
}

.btn-large { padding: 16px 40px; font-size: 17px; }
.btn-block { width: 100%; text-align: center; }

/* ===== HERO BADGE ===== */
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,0.18);
    border: 1px solid rgba(255,255,255,0.4);
    color: white;
    font-size: 13px;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: 20px;
    margin-bottom: 20px;
    backdrop-filter: blur(4px);
}

/* ===== PRICE CARDS ===== */
.price-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 28px;
}

.price-card {
    background: var(--color-white);
    border: 2px solid #E5E3DC;
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform var(--transition), border-color var(--transition);
}
.price-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-khaki);
}

.price-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-charcoal);
    margin-bottom: 12px;
}

.price-amount {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-khaki);
    line-height: 1.2;
}

.price-unit {
    font-size: 14px;
    font-weight: 400;
    color: var(--color-text-light);
}

.price-note {
    font-size: 12px;
    color: var(--color-text-light);
    margin-top: 8px;
}

.price-option-card {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--color-white);
    border: 2px dashed var(--color-khaki);
    border-radius: var(--radius);
    padding: 20px 24px;
    margin-bottom: 16px;
}

.price-option-icon {
    font-size: 32px;
    color: var(--color-khaki);
    flex-shrink: 0;
}

.price-option-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-charcoal);
    margin-bottom: 4px;
}

.price-option-desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.6;
}

.price-note-bottom {
    text-align: center;
    font-size: 14px;
    color: var(--color-text-light);
    background: var(--color-off-white);
    border-radius: var(--radius);
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 4px 8px;
}

@media (max-width: 768px) {
    .price-cards { grid-template-columns: repeat(2, 1fr); }
}

/* ===== HEADER ===== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-white);
    border-bottom: 1px solid #E8E8E3;
    box-shadow: 0 1px 8px rgba(0,0,0,0.06);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.logo-kana {
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.04em;
    opacity: 0.7;
}

.logo a {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--color-charcoal);
}

.nav ul {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav a {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-charcoal);
    transition: color var(--transition);
}
.nav a:not(.btn):hover { color: var(--color-khaki); }

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--color-charcoal);
    line-height: 1;
}

/* ===== HERO ===== */
.hero {
    position: relative;
    min-height: 560px;
    display: flex;
    align-items: center;
    background-size: cover;
    background-position: center;
    background-color: #6b6050;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(30, 25, 20, 0.55);
}

.hero-content {
    position: relative;
    z-index: 1;
    color: var(--color-white);
    padding-top: 60px;
    padding-bottom: 60px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-title {
    font-size: clamp(32px, 5vw, 54px);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 16px;
    letter-spacing: 0.02em;
}

.hero-subtitle {
    font-size: clamp(15px, 2vw, 19px);
    margin-bottom: 36px;
    opacity: 0.9;
}

/* フレーズを途中で改行させない（日本語の読みやすさ向上） */
.nb { display: inline-block; }

/* ===== SECTION TITLES ===== */
.section-title {
    font-size: clamp(24px, 3vw, 34px);
    font-weight: 700;
    text-align: center;
    margin-bottom: 12px;
    color: var(--color-charcoal);
    letter-spacing: 0.02em;
}

.section-desc {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: 52px;
    font-size: 15px;
}

/* ===== FEATURES (About) ===== */
.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    background: var(--color-white);
    border: 1px solid #E5E3DC;
    border-radius: var(--radius);
    padding: 36px 28px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform var(--transition);
}
.feature-card:hover { transform: translateY(-4px); }

.feature-icon {
    font-size: 40px;
    color: var(--color-khaki);
    margin-bottom: 16px;
    line-height: 1;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--color-charcoal);
}

.feature-card p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ===== STONE CARDS ===== */
.stone-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.stone-card {
    background: var(--color-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    transition: transform var(--transition);
}
.stone-card:hover { transform: translateY(-4px); }

.stone-img {
    height: 200px;
    overflow: hidden;
    background: #D8D5CC;
}
.stone-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.stone-card:hover .stone-img img { transform: scale(1.04); }

.stone-info {
    padding: 24px;
    flex: 1;
}

.stone-info h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-charcoal);
}

.stone-info p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
}

.img-note {
    font-size: 11px;
    color: #BCBAB4;
    margin-top: 8px;
}

/* ===== OTHER SERVICES ===== */
.other-services-divider {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 48px 0 8px;
    color: var(--color-text-light);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
}
.other-services-divider::before,
.other-services-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: #D5D3CC;
}

.other-services-note {
    text-align: center;
    font-size: 13px;
    color: var(--color-text-light);
    margin-bottom: 24px;
}

.service-img {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-khaki-light);
}
.service-img .ph {
    font-size: 56px;
    color: var(--color-khaki);
}

/* ===== FLOW ===== */
.flow-steps {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    justify-content: center;
}

.flow-step {
    flex: 1;
    max-width: 280px;
    text-align: center;
    background: var(--color-white);
    border: 1px solid #E5E3DC;
    border-radius: var(--radius);
    padding: 36px 24px;
    box-shadow: var(--shadow);
}

.step-number {
    display: inline-block;
    background: var(--color-khaki);
    color: var(--color-white);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 16px;
}

.step-icon {
    font-size: 36px;
    color: var(--color-khaki);
    margin-bottom: 14px;
    line-height: 1;
}

.flow-step h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--color-charcoal);
}

.flow-step p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
}

.step-arrow {
    font-size: 28px;
    color: var(--color-khaki);
    opacity: 0.6;
    margin-top: 60px;
    flex-shrink: 0;
}

/* ===== CONTACT FORM ===== */
.form-wrapper {
    max-width: 720px;
    margin: 0 auto;
    background: var(--color-white);
    border-radius: var(--radius);
    padding: 48px 48px;
    box-shadow: var(--shadow);
}

.contact-form { display: flex; flex-direction: column; gap: 20px; }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group { display: flex; flex-direction: column; gap: 6px; }

.form-group label {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-charcoal);
}

.required {
    background: var(--color-khaki);
    color: white;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 3px;
    margin-left: 6px;
    vertical-align: middle;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #D5D3CC;
    border-radius: var(--radius);
    font-family: var(--font);
    font-size: 15px;
    color: var(--color-text);
    background: var(--color-white);
    transition: border-color var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--color-khaki);
    box-shadow: 0 0 0 3px rgba(139,115,85,0.12);
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: #BCBAB4; }

.form-group textarea { resize: vertical; min-height: 120px; }

.select-wrapper { position: relative; }
.select-wrapper select { appearance: none; padding-right: 36px; cursor: pointer; }
.select-wrapper .ph {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 18px;
    color: var(--color-text-light);
    pointer-events: none;
}

.form-submit { margin-top: 8px; }

.form-success {
    display: none;
    text-align: center;
    padding: 48px 24px;
}
.form-success .ph {
    font-size: 56px;
    color: var(--color-khaki);
    margin-bottom: 16px;
    display: block;
}
.form-success h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-charcoal);
    margin-bottom: 12px;
}
.form-success p {
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--color-charcoal);
    color: rgba(255,255,255,0.85);
    padding: 48px 0 28px;
}

.footer-content { text-align: center; margin-bottom: 32px; }

.footer-logo {
    font-size: 26px;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: white;
    margin-bottom: 8px;
}

.footer-desc { font-size: 14px; opacity: 0.7; }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.12);
    padding-top: 20px;
    text-align: center;
    font-size: 13px;
    opacity: 0.5;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .section { padding: 56px 0; }

    .hero-title { font-size: 30px; line-height: 1.4; }
    .hero-subtitle { font-size: 15px; }

    .menu-toggle { display: block; }

    .nav {
        display: none;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        background: var(--color-white);
        border-bottom: 1px solid #E8E8E3;
        padding: 20px 24px;
        box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    }
    .nav.open { display: block; }
    .nav ul { flex-direction: column; gap: 16px; align-items: flex-start; }
    .nav .btn { margin-top: 8px; }

    .header { position: relative; }

    .features { grid-template-columns: 1fr; }
    .stone-cards { grid-template-columns: 1fr; }

    .flow-steps { flex-direction: column; align-items: center; }
    .step-arrow { transform: rotate(90deg); margin: -4px 0; }
    .flow-step { max-width: 100%; width: 100%; }

    .form-row { grid-template-columns: 1fr; }
    .form-wrapper { padding: 28px 20px; }
}