/* ==========================================================================
   layout.css
   ページ全体の骨格（ヘッダー・セクション・グリッド）を定義する
   ========================================================================== */

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-base);
}

.container {
    width: 100%;
    max-width: var(--container-width);
    margin-inline: auto;
    padding-inline: var(--space-4);
}

section {
    position: relative;
    padding-block: var(--space-8);
}

.section-head {
    text-align: center;
    margin-bottom: var(--space-6);
}

.section-label {
    display: inline-block;
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-cyan);
    margin-bottom: var(--space-2);
}

.section-title {
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 700;
    letter-spacing: 0.02em;
}

.section-desc {
    margin-top: var(--space-3);
    color: var(--color-text-muted);
    max-width: 560px;
    margin-inline: auto;
}

/* --- 固定ナビゲーション --- */
.site-nav {
    position: fixed;
    inset-block-start: 0;
    inset-inline: 0;
    z-index: var(--z-nav);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-block: var(--space-3);
    background: rgba(5, 6, 10, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--duration-fast) var(--ease-standard),
        background-color var(--duration-fast) var(--ease-standard);
}

.site-nav.is-scrolled {
    border-bottom-color: var(--color-border);
}

.site-nav__inner {
    width: 100%;
    max-width: var(--container-width);
    margin-inline: auto;
    padding-inline: var(--space-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-nav__logo {
    font-weight: 700;
    letter-spacing: 0.05em;
}

.site-nav__links {
    display: flex;
    gap: var(--space-5);
}

/* --- Hero --- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: var(--space-8);
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    z-index: -1;
    /* 月明かりのような単色の淡いグローのみに留め、過剰なネオン演出は避ける */
    background:
        radial-gradient(circle at 50% 15%, rgba(96, 165, 250, 0.14), transparent 55%),
        radial-gradient(circle at 15% 85%, rgba(96, 165, 250, 0.06), transparent 50%);
}

.hero__icon {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    margin-bottom: var(--space-5);
    border: 1px solid var(--color-border-strong);
    box-shadow: var(--shadow-glow);
}

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

.hero__icon--placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    font-size: 2rem;
    color: var(--color-text-faint);
}

.hero__name {
    font-size: clamp(2rem, 6vw, 3.6rem);
    font-weight: 800;
    letter-spacing: 0.02em;
}

.hero__title {
    margin-top: var(--space-2);
    font-size: clamp(1rem, 2vw, 1.3rem);
    color: var(--color-text-muted);
}

.hero__catch {
    margin-top: var(--space-4);
    font-size: clamp(0.95rem, 1.5vw, 1.1rem);
    color: var(--color-text-muted);
}

.hero__social {
    margin-top: var(--space-5);
    display: flex;
    gap: var(--space-3);
}

.hero__scroll {
    position: absolute;
    inset-block-end: var(--space-5);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
    color: var(--color-text-faint);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
}

/* --- グリッド系レイアウト --- */
.grid {
    display: grid;
    gap: var(--space-5);
}

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

.grid--3 {
    grid-template-columns: repeat(3, 1fr);
}

.about__grid {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: var(--space-6);
    align-items: center;
}

.footer {
    padding-block: var(--space-5);
    text-align: center;
    color: var(--color-text-faint);
    font-size: 0.85rem;
    border-top: 1px solid var(--color-border);
}