/* ============================================================
   goemon-arma3.com  —  main stylesheet
   Constraints: no images, no emoji, typography + layout only
   ============================================================ */

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

/* --- Custom properties ------------------------------------- */
:root {
    /* palette — dark navy + warm off-white */
    --bg-dark: #0e1117;
    --bg-card: #161b22;
    --bg-light: #f4f1ec;
    --fg-main: #c9d1d9;
    --fg-heading: #e6edf3;
    --fg-muted: #8b949e;
    --accent: #c0926e;
    /* warm copper */
    --accent-dim: rgba(192, 146, 110, .15);
    --rule: rgba(201, 209, 217, .12);

    /* type scale — modular 1.25 */
    --fs-xs: .75rem;
    --fs-sm: .875rem;
    --fs-base: 1rem;
    --fs-md: 1.125rem;
    --fs-lg: 1.5rem;
    --fs-xl: 2rem;
    --fs-2xl: 2.75rem;
    --fs-3xl: 3.5rem;

    /* measure */
    --content-w: 68rem;
    --gutter: clamp(1.25rem, 4vw, 3rem);
}

/* --- Base -------------------------------------------------- */
html {
    font-size: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: "Noto Sans JP", "Helvetica Neue", Arial, sans-serif;
    font-size: var(--fs-base);
    font-weight: 400;
    line-height: 1.75;
    color: var(--fg-main);
    background: var(--bg-dark);
    -webkit-font-smoothing: antialiased;
}

/* --- Headings — display serif ----------------------------- */
h1,
h2,
h3,
h4 {
    font-family: "Playfair Display", "Noto Serif JP", Georgia, serif;
    font-weight: 600;
    line-height: 1.2;
    color: var(--fg-heading);
    letter-spacing: .01em;
}

h1 {
    font-size: var(--fs-3xl);
}

h2 {
    font-size: var(--fs-2xl);
    margin-bottom: 1rem;
}

h3 {
    font-size: var(--fs-lg);
    margin-bottom: .5rem;
}

/* --- Links ------------------------------------------------- */
a {
    color: var(--accent);
    text-decoration: none;
    transition: color .15s;
}

a:hover,
a:focus-visible {
    color: var(--fg-heading);
}

/* --- Layout shell ------------------------------------------ */
.wrapper {
    max-width: var(--content-w);
    margin: 0 auto;
    padding: 0 var(--gutter);
}

section {
    padding: 5rem 0;
}

section+section {
    border-top: 1px solid var(--rule);
}

/* ============================================================
   HEADER / NAV
   ============================================================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(14, 17, 23, .92);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--rule);
}

.site-header .wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 3.5rem;
}

.site-header .logo {
    font-family: "Playfair Display", serif;
    font-size: var(--fs-md);
    font-weight: 700;
    color: var(--fg-heading);
    letter-spacing: .04em;
}

.site-nav {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.site-nav a {
    font-size: var(--fs-sm);
    color: var(--fg-muted);
    text-transform: uppercase;
    letter-spacing: .08em;
    transition: color .15s;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
    color: var(--fg-heading);
}

/* mobile nav toggle */
.nav-toggle {
    display: none;
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
    padding: 8rem 0 6rem;
    border-bottom: none;
}

.hero h1 {
    max-width: 18ch;
    margin-bottom: 1.5rem;
}

.hero .lead {
    font-size: var(--fs-md);
    color: var(--fg-muted);
    max-width: 42ch;
    margin-bottom: 2.5rem;
}

.hero-cta {
    display: flex;
    gap: 1.25rem;
    flex-wrap: wrap;
}

/* --- Buttons ---------------------------------------------- */
.btn {
    display: inline-block;
    padding: .75rem 1.75rem;
    font-size: var(--fs-sm);
    font-weight: 600;
    letter-spacing: .04em;
    border-radius: 2px;
    transition: background .15s, color .15s;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-dark);
}

.btn-primary:hover {
    background: var(--fg-heading);
    color: var(--bg-dark);
}

.btn-ghost {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
}

.btn-ghost:hover {
    background: var(--accent-dim);
    color: var(--fg-heading);
}

/* ============================================================
   CARDS GRID  —  "このサーバーでできること"
    /* ============================================================
       SERVER STATUS BAR
       ============================================================ */
.server-status {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: .6rem 1rem;
    background: var(--bg-card);
    border-left: 3px solid var(--fg-muted);
    border-radius: 0 4px 4px 0;
    font-size: var(--fs-sm);
    margin-bottom: 1rem;
}

.status-badge {
    font-weight: 700;
    letter-spacing: .04em;
}

.status-online {
    color: #3fb950;
    /* GitHub green */
    border-color: #3fb950;
}

.server-status:has(.status-online) {
    border-left-color: #3fb950;
}

.status-debug {
    color: #d29922;
}

.server-status:has(.status-debug) {
    border-left-color: #d29922;
}

.status-offline {
    color: var(--fg-muted);
}

.status-loading {
    color: var(--fg-muted);
}

.status-players {
    color: var(--fg-muted);
    font-size: var(--fs-xs);
}

/* ============================================================
       CARDS GRID  —  "このサーバーでできること"
   ============================================================ */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--bg-card);
    border-left: 3px solid var(--accent);
    padding: 1.75rem 1.5rem;
    border-radius: 0 4px 4px 0;
    transition: border-color .2s, transform .15s;
}

.card:hover {
    border-left-color: var(--fg-heading);
    transform: translateY(-2px);
}

.card h3 {
    font-family: "Noto Sans JP", sans-serif;
    font-weight: 700;
    font-size: var(--fs-base);
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--accent);
    margin-bottom: .75rem;
}

.card p {
    font-size: var(--fs-sm);
    color: var(--fg-muted);
    margin-bottom: 1rem;
}

.card .card-link {
    font-size: var(--fs-xs);
    font-weight: 600;
    letter-spacing: .06em;
    text-transform: uppercase;
}

/* ============================================================
   STEPS  —  "はじめての30分"
   ============================================================ */
.steps {
    counter-reset: step;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
}

.step {
    counter-increment: step;
    position: relative;
    padding-left: 3.5rem;
}

.step::before {
    content: counter(step, decimal-leading-zero);
    position: absolute;
    left: 0;
    top: 0;
    font-family: "Playfair Display", serif;
    font-size: var(--fs-xl);
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.step h3 {
    font-family: "Noto Sans JP", sans-serif;
    font-size: var(--fs-base);
    font-weight: 700;
    margin-bottom: .5rem;
}

.step p {
    font-size: var(--fs-sm);
    color: var(--fg-muted);
}

/* ============================================================
   UPDATES  —  "最近の更新"
   ============================================================ */
.update-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.update-item {
    display: flex;
    gap: 1.5rem;
    align-items: baseline;
}

.update-date {
    flex-shrink: 0;
    width: 6rem;
    font-size: var(--fs-xs);
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--fg-muted);
}

.update-body h3 {
    font-family: "Noto Sans JP", sans-serif;
    font-size: var(--fs-base);
    font-weight: 600;
    color: var(--fg-heading);
    margin-bottom: .25rem;
}

.update-body p {
    font-size: var(--fs-sm);
    color: var(--fg-muted);
}

/* ============================================================
   QUICK LINKS  —  footer-above band
   ============================================================ */
.quick-links {
    background: var(--bg-card);
}

.quick-links-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 2.5rem;
}

.quick-links-group h3 {
    font-family: "Noto Sans JP", sans-serif;
    font-size: var(--fs-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--fg-heading);
    margin-bottom: .75rem;
}

.quick-links-group ul {
    list-style: none;
}

.quick-links-group li+li {
    margin-top: .5rem;
}

.quick-links-group a {
    font-size: var(--fs-sm);
    color: var(--fg-muted);
}

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

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
    padding: 2rem 0;
    border-top: 1px solid var(--rule);
    text-align: center;
    font-size: var(--fs-xs);
    color: var(--fg-muted);
}

/* ============================================================
   KEY TABLE  —  sub-page: キー操作
   ============================================================ */
.key-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--fs-sm);
}

.key-table th,
.key-table td {
    text-align: left;
    padding: .75rem 1rem;
    border-bottom: 1px solid var(--rule);
}

.key-table th {
    font-weight: 700;
    color: var(--fg-heading);
    font-size: var(--fs-xs);
    text-transform: uppercase;
    letter-spacing: .08em;
}

.key-table kbd {
    display: inline-block;
    padding: .15em .45em;
    font-family: "SF Mono", "Fira Code", monospace;
    font-size: .85em;
    background: var(--bg-dark);
    border: 1px solid var(--rule);
    border-radius: 3px;
    color: var(--accent);
}

/* ============================================================
   PROSE  —  long-form text pages
   ============================================================ */
.prose {
    max-width: 52rem;
}

.prose p+p {
    margin-top: 1.25rem;
}

.prose ul,
.prose ol {
    margin: 1rem 0 1rem 1.5rem;
}

.prose li+li {
    margin-top: .5rem;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
    :root {
        --fs-3xl: 2.25rem;
        --fs-2xl: 1.75rem;
        --fs-xl: 1.5rem;
    }

    .hero {
        padding: 5rem 0 3.5rem;
    }

    .site-nav {
        display: none;
    }

    .nav-toggle {
        display: block;
        background: none;
        border: none;
        color: var(--fg-heading);
        font-size: 1.5rem;
        cursor: pointer;
    }

    .site-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 3.5rem;
        right: 0;
        left: 0;
        background: var(--bg-dark);
        padding: 1rem var(--gutter);
        border-bottom: 1px solid var(--rule);
    }

    .update-item {
        flex-direction: column;
        gap: .25rem;
    }

    .update-date {
        width: auto;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
    }

    .btn {
        text-align: center;
    }
}

/* --- Language Switch --------------------------------------- */
.lang-switch {
    font-size: var(--fs-xs);
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    padding: .25em .6em;
    border: 1px solid var(--accent);
    border-radius: 3px;
    color: var(--accent);
    transition: background .2s, color .2s;
}

.lang-switch:hover {
    background: var(--accent);
    color: var(--bg-dark);
}
}