@charset "UTF-8";

/* ═══════════════════════════════════════════════════════════════
   北方古詩『白冠を越えし者の歌』（俗称：北天の勇者オルファン）
   皇立学院第三書庫蔵・第四写本 抄訳コデックス スタイルシート
   ═══════════════════════════════════════════════════════════════ */

:root {
    --parchment-light: #f6ead0;
    --parchment-base: #efe0bc;
    --parchment-mid: #e4cfa1;
    --parchment-edge: #cfb47c;
    --wood-bg: #1e130a;

    --ink-deep: #26170a;
    --ink-body: #382514;
    --ink-muted: #5c442c;
    --ink-faint: #7b6248;

    --rubric-red: #842419;
    --rubric-soft: rgba(132, 36, 25, 0.18);
    --gold-leaf: #9e7418;
    --gold-bright: #c59b38;
    --gold-faint: rgba(158, 116, 24, 0.22);
    --aurora-emerald: #2c5e4f;
    --aurora-glow: rgba(44, 94, 79, 0.08);

    --font-latin-deco: 'Cinzel Decorative', 'Cinzel', serif;
    --font-latin: 'Cinzel', 'EB Garamond', serif;
    --font-latin-body: 'EB Garamond', serif;
    --font-verse: 'Shippori Mincho', 'Noto Serif JP', 'Yu Mincho', serif;
    --font-scholar: 'Noto Serif JP', 'Yu Mincho', serif;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    background-color: var(--wood-bg);
    background-image:
        radial-gradient(ellipse at 20% 15%, rgba(72, 46, 22, 0.65) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 85%, rgba(58, 36, 16, 0.6) 0%, transparent 60%),
        repeating-linear-gradient(
            90deg,
            rgba(255, 255, 255, 0.012) 0px,
            rgba(255, 255, 255, 0.012) 2px,
            transparent 2px,
            transparent 9px
        );
    color: var(--ink-body);
    font-family: var(--font-verse);
    line-height: 2.05;
    min-height: 100vh;
    padding: 36px 20px 60px;
    -webkit-font-smoothing: antialiased;
}

/* ═══ 羊皮紙写本本体 ═══ */
.manuscript {
    max-width: 920px;
    margin: 0 auto;
    padding: 64px 68px 60px;
    position: relative;
    overflow: hidden;
    background:
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 33px,
            rgba(138, 104, 54, 0.045) 33px,
            rgba(138, 104, 54, 0.045) 34px
        ),
        radial-gradient(ellipse at 12% 18%, rgba(145, 105, 48, 0.16) 0%, transparent 46%),
        radial-gradient(ellipse at 88% 42%, rgba(130, 92, 40, 0.13) 0%, transparent 42%),
        radial-gradient(ellipse at 24% 78%, rgba(140, 100, 45, 0.14) 0%, transparent 48%),
        radial-gradient(ellipse at 78% 92%, rgba(120, 82, 34, 0.16) 0%, transparent 40%),
        linear-gradient(
            180deg,
            var(--parchment-mid) 0%,
            var(--parchment-light) 4%,
            var(--parchment-base) 48%,
            var(--parchment-light) 82%,
            var(--parchment-mid) 97%,
            var(--parchment-edge) 100%
        );
    background-color: var(--parchment-base);
    border: 3px solid var(--gold-leaf);
    box-shadow:
        0 18px 60px rgba(0, 0, 0, 0.78),
        0 0 0 1px rgba(38, 23, 10, 0.85),
        inset 0 0 95px rgba(120, 82, 28, 0.28),
        inset 0 0 28px rgba(92, 58, 18, 0.22);
    animation: codexFadeIn 1.1s ease-out;
}

/* 羊皮紙の縁ヤケと繊維ノイズ */
.manuscript::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(to right, rgba(42, 24, 8, 0.16) 0%, transparent 4.5%, transparent 95.5%, rgba(42, 24, 8, 0.16) 100%),
        linear-gradient(to bottom, rgba(42, 24, 8, 0.12) 0%, transparent 2.5%, transparent 97.5%, rgba(42, 24, 8, 0.14) 100%);
    pointer-events: none;
    z-index: 1;
}

.manuscript::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.055'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 2;
    opacity: 0.65;
}

.manuscript > * {
    position: relative;
    z-index: 3;
}

/* 内側二重飾り罫 */
.codex-inner-frame {
    border: 1px solid rgba(158, 116, 24, 0.42);
    padding: 46px 44px 50px;
    position: relative;
}

.codex-inner-frame::before,
.codex-inner-frame::after {
    content: '❖';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    background: var(--parchment-base);
    padding: 0 12px;
    color: var(--gold-leaf);
    font-size: 0.95rem;
    line-height: 1;
}

.codex-inner-frame::before {
    top: -0.55rem;
}

.codex-inner-frame::after {
    bottom: -0.55rem;
}

/* ═══ 巻頭・扉 ═══ */
.codex-header {
    text-align: center;
    margin-bottom: 36px;
}

.archive-shelfmark {
    font-family: var(--font-latin);
    font-size: 0.75rem;
    letter-spacing: 0.24em;
    color: var(--ink-faint);
    text-transform: uppercase;
    margin-bottom: 18px;
}

.frontispiece {
    margin: 0 auto 24px;
    max-width: 310px;
}

.frontispiece img {
    width: 100%;
    height: auto;
    display: block;
    border: 4px double var(--gold-leaf);
    padding: 5px;
    background: rgba(246, 234, 208, 0.55);
    box-shadow: 0 6px 20px rgba(42, 26, 10, 0.25);
    filter: sepia(14%) contrast(103%) saturate(88%);
}

.codex-latin-title {
    font-family: var(--font-latin-deco);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gold-leaf);
    letter-spacing: 0.16em;
    line-height: 1.45;
    margin-bottom: 10px;
    text-shadow: 0 1px 1px rgba(255, 255, 255, 0.4);
}

.codex-main-title {
    font-family: var(--font-verse);
    font-size: 2.35rem;
    font-weight: 700;
    color: var(--ink-deep);
    letter-spacing: 0.22em;
    line-height: 1.35;
    margin-bottom: 10px;
    padding-left: 0.22em;
}

.codex-vernacular-title {
    font-family: var(--font-scholar);
    font-size: 1.02rem;
    font-weight: 600;
    color: var(--rubric-red);
    letter-spacing: 0.14em;
    margin-bottom: 14px;
}

.em-dash {
    letter-spacing: -0.08em;
    margin: 0 0.25em;
}

.codex-provenance {
    font-family: var(--font-scholar);
    font-size: 0.86rem;
    color: var(--ink-muted);
    letter-spacing: 0.08em;
    line-height: 1.8;
}

/* ═══ 歌目録（ナビゲーション） ═══ */
.canto-index {
    margin: 28px auto 34px;
    max-width: 580px;
    padding: 16px 24px;
    border-top: 1px solid var(--gold-faint);
    border-bottom: 1px solid var(--gold-faint);
    background: rgba(158, 116, 24, 0.045);
}

.canto-index__heading {
    font-family: var(--font-latin);
    font-size: 0.74rem;
    letter-spacing: 0.3em;
    text-align: center;
    color: var(--gold-leaf);
    margin-bottom: 10px;
}

.canto-index__list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 22px;
}

.canto-index__list a {
    font-family: var(--font-verse);
    font-size: 0.86rem;
    color: var(--ink-body);
    text-decoration: none;
    letter-spacing: 0.06em;
    border-bottom: 1px dotted transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.canto-index__list a:hover {
    color: var(--rubric-red);
    border-bottom-color: var(--rubric-red);
}

.canto-index__num {
    font-family: var(--font-latin);
    color: var(--rubric-red);
    font-weight: 600;
    margin-right: 4px;
}

/* ═══ 飾り罫・場面転換 ═══ */
.ornamental-rule {
    border: none;
    height: 36px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='600' height='36' viewBox='0 0 600 36'%3E%3Cpath d='M20,18 L245,18 M355,18 L580,18' stroke='%239e7418' stroke-width='1' opacity='0.75'/%3E%3Cpath d='M255,18 Q277,6 300,18 Q323,30 345,18' stroke='%23842419' fill='none' stroke-width='1.3'/%3E%3Cpath d='M255,18 Q277,30 300,18 Q323,6 345,18' stroke='%239e7418' fill='none' stroke-width='1.1'/%3E%3Ccircle cx='300' cy='18' r='3.5' fill='%23842419'/%3E%3Ccircle cx='248' cy='18' r='2' fill='%239e7418'/%3E%3Ccircle cx='352' cy='18' r='2' fill='%239e7418'/%3E%3C/svg%3E") center / contain no-repeat;
    margin: 38px 0;
    opacity: 0.9;
}

.canto-divider {
    text-align: center;
    color: var(--gold-leaf);
    font-size: 0.95rem;
    letter-spacing: 0.6em;
    margin: 44px 0 38px;
    position: relative;
}

.canto-divider::before,
.canto-divider::after {
    content: '';
    display: inline-block;
    width: 90px;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(158, 116, 24, 0.6), transparent);
    vertical-align: middle;
    margin: 0 14px;
}

/* ═══ 各歌（Canto）セクション ═══ */
.canto {
    margin: 16px 0 24px;
}

.canto-header {
    text-align: center;
    margin-bottom: 28px;
}

.canto-latin-num {
    font-family: var(--font-latin-deco);
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--rubric-red);
    letter-spacing: 0.28em;
    display: block;
    margin-bottom: 6px;
}

.canto-title {
    font-family: var(--font-verse);
    font-size: 1.48rem;
    font-weight: 700;
    color: var(--ink-deep);
    letter-spacing: 0.18em;
    padding-left: 0.18em;
}

/* ═══ 写本図版 ═══ */
.illustration {
    margin: 26px auto 34px;
    text-align: center;
    max-width: 620px;
}

.illustration__frame {
    display: inline-block;
    max-width: 100%;
    padding: 7px;
    background: rgba(244, 231, 202, 0.7);
    border: 1px solid var(--gold-leaf);
    box-shadow:
        0 6px 22px rgba(42, 26, 10, 0.24),
        inset 0 0 0 3px rgba(158, 116, 24, 0.25);
}

.illustration img {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    border: 2px solid rgba(92, 68, 44, 0.65);
    filter: sepia(12%) contrast(102%) saturate(90%);
}

.canto--aurora .illustration img {
    /* 第五歌の彩色写本図版は翡翠と銀泥の色味を活かすためセピアを抑える */
    filter: sepia(4%) contrast(104%) saturate(98%);
}

.illustration-caption {
    font-family: var(--font-latin-body), var(--font-scholar);
    font-size: 0.83rem;
    color: var(--ink-muted);
    font-style: italic;
    margin: 10px -24px 0;
    letter-spacing: 0.025em;
    line-height: 1.6;
}

.illustration-credit {
    font-family: var(--font-scholar);
    font-size: 0.68rem;
    color: rgba(123, 98, 72, 0.65);
    margin-top: 2px;
    letter-spacing: 0.04em;
}

/* ═══ 叙事詩組版（連・詩行） ═══ */
.verse-body {
    max-width: 710px;
    margin: 0 auto;
}

.stanza {
    margin-bottom: 1.85em;
    padding-left: 0.8em;
}

.verse-line {
    font-family: var(--font-verse);
    font-size: 0.99rem;
    line-height: 2.15;
    letter-spacing: 0.038em;
    color: var(--ink-body);
    /* モバイル等で折り返した際に2行目以降を字下げする伝統詩集組版 */
    padding-left: 1.5em;
    text-indent: -1.5em;
}

/* 各歌第1連・冒頭文字の朱彩イニシャル演出 */
.stanza--opening .verse-line:first-child::first-letter {
    font-family: var(--font-verse);
    font-size: 2.15em;
    font-weight: 700;
    color: var(--rubric-red);
    line-height: 1;
    margin-right: 0.06em;
    vertical-align: -0.08em;
    text-shadow: 1px 1px 0 rgba(158, 116, 24, 0.28);
}

/* 英雄オルファンの詠唱台詞行 */
.spoken-verse {
    margin: 1.9em 0 1.9em 0.8em;
    padding: 12px 12px 12px 16px;
    border-left: 3px double var(--gold-leaf);
    background: linear-gradient(to right, rgba(158, 116, 24, 0.09), transparent 90%);
    position: relative;
}

.spoken-verse__text {
    font-family: var(--font-verse);
    font-size: 0.99rem;
    font-weight: 600;
    color: var(--ink-deep);
    letter-spacing: 0.038em;
    line-height: 1.95;
}

/* 第五歌クライマックス用の淡い極光装飾 */
.canto--aurora {
    padding: 28px 24px 12px;
    margin-left: -24px;
    margin-right: -24px;
    background: radial-gradient(
        ellipse at 50% 38%,
        var(--aurora-glow) 0%,
        rgba(88, 72, 128, 0.04) 45%,
        transparent 78%
    );
    border-radius: 2px;
}

/* 結句（北方の詩人らの結びの三行） */
.stanza--coda {
    margin-top: 2.1em;
    padding: 16px 22px;
    border-top: 1px solid var(--gold-faint);
    border-bottom: 1px solid var(--gold-faint);
    background: rgba(158, 116, 24, 0.05);
}

.stanza--coda .verse-line {
    color: var(--ink-deep);
    font-weight: 500;
}

/* ═══ 皇立学院 書誌・地誌注記 ═══ */
.scholarly-codicil {
    margin: 36px auto 20px;
    max-width: 650px;
    padding: 26px 32px 24px;
    background: rgba(132, 98, 48, 0.065);
    border: 1px solid rgba(158, 116, 24, 0.45);
    border-left: 4px solid var(--rubric-red);
    position: relative;
}

.scholarly-codicil::before {
    content: 'SCHOLIA ACADEMIAE IMPERIALIS';
    display: block;
    font-family: var(--font-latin);
    font-size: 0.7rem;
    letter-spacing: 0.24em;
    color: var(--gold-leaf);
    margin-bottom: 6px;
}

.scholarly-codicil__title {
    font-family: var(--font-scholar);
    font-size: 1.02rem;
    font-weight: 700;
    color: var(--rubric-red);
    letter-spacing: 0.12em;
    margin-bottom: 14px;
}

.scholarly-codicil p {
    font-family: var(--font-scholar);
    font-size: 0.92rem;
    line-height: 1.95;
    color: var(--ink-muted);
    text-indent: 1em;
    text-align: justify;
    margin-bottom: 0.9em;
}

.scholarly-codicil p:last-child {
    margin-bottom: 0;
}

/* ═══ 奥付（Colophon） ═══ */
.colophon {
    text-align: center;
    margin-top: 46px;
    padding-top: 28px;
    border-top: 1px solid rgba(158, 116, 24, 0.5);
    font-family: var(--font-scholar);
    font-size: 0.8rem;
    color: var(--ink-muted);
    line-height: 1.85;
}

.colophon__seal {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 2px solid var(--rubric-red);
    box-shadow: inset 0 0 0 3px rgba(132, 36, 25, 0.2);
    font-family: var(--font-latin-deco);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--rubric-red);
    margin: 4px auto 16px;
    opacity: 0.78;
    transform: rotate(-6deg);
    letter-spacing: 0.06em;
}

.colophon__latin {
    font-family: var(--font-latin);
    font-size: 0.88rem;
    letter-spacing: 0.16em;
    color: var(--ink-body);
    margin-bottom: 4px;
}

.colophon__finis {
    font-family: var(--font-latin-body);
    font-style: italic;
    font-size: 1rem;
    color: var(--gold-leaf);
    letter-spacing: 0.2em;
    margin: 18px 0;
}

.colophon__disclaimer {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px dotted rgba(158, 116, 24, 0.35);
    font-size: 0.73rem;
    color: var(--ink-faint);
    opacity: 0.82;
    line-height: 1.75;
}

@keyframes codexFadeIn {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ═══ レスポンシブ（768px / 480px） ═══ */
@media (max-width: 768px) {
    body {
        padding: 16px 10px 36px;
    }

    .manuscript {
        padding: 34px 24px 36px;
    }

    .codex-inner-frame {
        padding: 28px 20px 32px;
    }

    .codex-main-title {
        font-size: 1.75rem;
        letter-spacing: 0.14em;
    }

    .codex-latin-title {
        font-size: 0.98rem;
        letter-spacing: 0.1em;
    }

    .frontispiece {
        max-width: 230px;
    }

    .illustration-caption {
        margin: 10px 0 0;
    }

    .stanza {
        padding-left: 0.3em;
    }

    .verse-line {
        font-size: 0.96rem;
        line-height: 2.05;
    }

    .spoken-verse {
        margin-left: 0.3em;
        padding: 10px 14px;
    }

    .canto--aurora {
        margin-left: -10px;
        margin-right: -10px;
        padding: 20px 12px 8px;
    }

    .scholarly-codicil {
        padding: 20px 18px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 8px 6px 24px;
    }

    .manuscript {
        padding: 20px 12px 24px;
        border-width: 2px;
    }

    .codex-inner-frame {
        padding: 22px 12px 24px;
    }

    .codex-main-title {
        font-size: 1.42rem;
        letter-spacing: 0.1em;
    }

    .codex-vernacular-title {
        font-size: 0.88rem;
        letter-spacing: 0.08em;
    }

    .canto-title {
        font-size: 1.22rem;
        letter-spacing: 0.1em;
    }

    .canto-index {
        padding: 12px 12px;
    }

    .canto-index__list {
        flex-direction: column;
        align-items: center;
        gap: 6px;
    }

    .stanza {
        padding-left: 0;
        margin-bottom: 1.55em;
    }

    .verse-line {
        font-size: 0.91rem;
        line-height: 1.98;
        letter-spacing: 0.03em;
        padding-left: 1.2em;
        text-indent: -1.2em;
    }

    .spoken-verse {
        margin-left: 0;
        padding: 10px 12px;
    }

    .spoken-verse__text {
        font-size: 0.93rem;
    }

    .canto-divider::before,
    .canto-divider::after {
        width: 48px;
        margin: 0 8px;
    }
}