/* ============================================================
   半径3メートル出版 — フロントページ専用スタイル
   コンセプト：「ページ全体がひとつの川」
   スクロール＝川下り。AIのストリーミング＝水面に流れてくる言葉。
   ============================================================ */

:root {
    --river-ink: rgba(26, 5, 51, 0.08);          /* 川の線（淡い墨色） */
    --river-gold: rgba(200, 144, 58, 0.35);
    --paper-line: rgba(200, 144, 58, 0.25);      /* 帳面の罫線 */
    --shadow-soft: 0 8px 32px rgba(26, 5, 51, 0.08);
    --shadow-lift: 0 12px 40px rgba(26, 5, 51, 0.12);
    --radius: 14px;
}

/* ---------- 基本ユーティリティ ---------- */

.river-page {
    overflow-x: hidden;
    background: var(--color-bg);
    color: var(--color-text);
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.container-narrow { max-width: 760px; }

.sp-only { display: none; }
.pc-only { display: inline; }

.sr-only {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

/* ---------- ボタン ---------- */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
    font-family: var(--font-sans);
    font-weight: 700;
    line-height: 1;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: 999px;
    padding: 0.9em 1.8em;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease, color 0.25s ease;
}

.btn:hover { transform: translateY(-2px); }
.btn:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 3px; }

.btn-arrow { transition: transform 0.25s ease; }
.btn:hover .btn-arrow { transform: translateX(4px); }

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 4px 16px rgba(26, 5, 51, 0.25);
}
.btn-primary:hover { background: var(--color-primary-700); box-shadow: 0 8px 24px rgba(26, 5, 51, 0.3); }

.btn-gold {
    background: var(--color-accent);
    color: var(--color-primary);
    box-shadow: 0 4px 20px rgba(200, 144, 58, 0.4);
}
.btn-gold:hover { background: var(--color-accent-light); }

.btn-ghost {
    background: transparent;
    color: var(--color-primary);
    border-color: rgba(26, 5, 51, 0.25);
}
.btn-ghost:hover { border-color: var(--color-primary); background: rgba(26, 5, 51, 0.04); }

.btn-ghost-light {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.45);
}
.btn-ghost-light:hover { border-color: #fff; background: rgba(255, 255, 255, 0.08); }

.btn-lg { font-size: 1.05rem; padding: 1em 2em; }
.btn-xl { font-size: 1.15rem; padding: 1.1em 2.4em; }
.btn-block { width: 100%; justify-content: center; }

/* ---------- ストリーミングカーソル（櫂の雫） ---------- */

.stream-cursor {
    display: inline-block;
    width: 3px;
    height: 1.1em;
    margin-left: 2px;
    vertical-align: text-bottom;
    background: var(--color-accent);
    border-radius: 2px;
    animation: cursor-drip 1.1s ease-in-out infinite;
}

@keyframes cursor-drip {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.15; }
}

/* ---------- 川の現在地ゲージ（右端の舟） ---------- */

.river-gauge {
    position: fixed;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 50;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    pointer-events: none;
}

.river-gauge-track {
    position: relative;
    width: 4px;
    height: 38vh;
    background: var(--river-ink);
    border-radius: 4px;
}

.river-gauge-fill {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 0%;
    background: linear-gradient(to bottom, var(--color-accent-light), var(--color-accent));
    border-radius: 4px;
}

.river-gauge-boat {
    position: absolute;
    left: 50%;
    top: 0%;
    transform: translate(-50%, -50%);
    color: var(--color-primary);
}

.river-gauge-label {
    writing-mode: vertical-rl;
    font-family: var(--font-serif);
    font-size: 0.7rem;
    letter-spacing: 0.35em;
    color: var(--color-text-muted);
}

/* ============================================================
   1. ヒーロー — 出航
   ============================================================ */

.hero {
    position: relative;
    padding: calc(var(--header-height) + 72px) 0 0;
    background:
        radial-gradient(ellipse 80% 60% at 15% 0%, rgba(200, 144, 58, 0.07), transparent 60%),
        var(--color-bg);
}

.hero-river-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.hero-river-svg { width: 100%; height: 100%; }

.river-line {
    fill: none;
    stroke: var(--river-gold);
    stroke-width: 2;
    stroke-linecap: round;
    stroke-dasharray: 6 14;
    animation: river-flow 26s linear infinite;
}

.river-line-2 { stroke: var(--river-ink); animation-duration: 34s; }
.river-line-3 { stroke: var(--river-gold); opacity: 0.5; animation-duration: 42s; animation-direction: reverse; }

@keyframes river-flow {
    to { stroke-dashoffset: -400; }
}

.hero-inner {
    position: relative;
    display: grid;
    grid-template-columns: 1.2fr 0.9fr;
    gap: 56px;
    align-items: start;
    padding-bottom: 120px;
}

.hero-label {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.25em;
    color: var(--color-accent);
    margin: 0 0 20px;
}

.hero-label-line {
    display: inline-block;
    width: 40px;
    height: 2px;
    background: var(--color-accent);
}

.hero-tagline {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4.5vw, 3.3rem);
    font-weight: 700;
    line-height: 1.45;
    letter-spacing: 0.03em;
    color: var(--color-primary);
    margin: 0 0 28px;
}

.hero-tagline-em {
    font-style: normal;
    display: inline-block; /* ハイライト句を途中で折り返さない */
    background: linear-gradient(transparent 62%, rgba(245, 210, 138, 0.75) 62%);
    padding: 0 0.06em;
}

.hero-lede {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    line-height: 2.1;
    color: var(--color-text);
    margin: 0 0 32px;
}

.hero-lede strong { color: var(--color-primary); }

/* 相棒AIの一筆箋 */
.hero-ai-note {
    position: relative;
    max-width: 520px;
    background: var(--color-surface);
    border: 1px solid rgba(200, 144, 58, 0.3);
    border-left: 4px solid var(--color-accent);
    border-radius: 6px;
    padding: 16px 20px 18px;
    margin: 0 0 36px;
    box-shadow: var(--shadow-soft);
}

.hero-ai-note-head {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.ai-oar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(200, 144, 58, 0.12);
    color: var(--color-accent);
}

.hero-ai-text {
    font-family: var(--font-serif);
    font-size: 1rem;
    line-height: 2;
    color: var(--color-text);
    margin: 0;
    min-height: 4em;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

/* ---------- 乗船券（診断カード） ---------- */

.ticket-card {
    position: relative;
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 32px 28px 28px;
    box-shadow: var(--shadow-lift);
    border: 1px solid rgba(26, 5, 51, 0.06);
    background-image: repeating-linear-gradient(
        to bottom,
        transparent 0,
        transparent 31px,
        rgba(200, 144, 58, 0.07) 31px,
        rgba(200, 144, 58, 0.07) 32px
    );
}

/* 切符の切り欠き */
.ticket-notch {
    position: absolute;
    top: 96px;
    width: 22px;
    height: 22px;
    background: var(--color-bg);
    border-radius: 50%;
    box-shadow: inset 0 2px 4px rgba(26, 5, 51, 0.06);
}
.ticket-notch-left { left: -11px; }
.ticket-notch-right { right: -11px; }

.ticket-head {
    text-align: center;
    border-bottom: 2px dashed rgba(200, 144, 58, 0.4);
    padding-bottom: 22px;
    margin-bottom: 22px;
}

.ticket-kicker {
    font-family: var(--font-serif);
    font-size: 0.75rem;
    letter-spacing: 0.5em;
    color: var(--color-accent);
    margin: 0 0 10px;
}

.ticket-title {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: 0 0 8px;
}

.ticket-sub {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin: 0;
}

.ticket-progress {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 22px;
}

.ticket-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-bg-alt);
    border: 2px solid rgba(26, 5, 51, 0.15);
    transition: background-color 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

.ticket-dot.is-current {
    border-color: var(--color-accent);
    background: var(--color-accent-light);
    transform: scale(1.25);
}

.ticket-dot.is-done {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.ticket-wave {
    width: 36px;
    height: 2px;
    border-radius: 2px;
    background: repeating-linear-gradient(to right, rgba(26, 5, 51, 0.18) 0 6px, transparent 6px 12px);
}

.quiz-step { display: none; }
.quiz-step.is-active { display: block; animation: step-in 0.4s ease both; }

@keyframes step-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.quiz-question {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.7;
    margin: 0 0 16px;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.quiz-btn {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    text-align: left;
    background: var(--color-bg);
    color: var(--color-text);
    border: 1.5px solid rgba(26, 5, 51, 0.15);
    border-radius: 10px;
    padding: 13px 16px;
    cursor: pointer;
    transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.quiz-btn:hover {
    border-color: var(--color-accent);
    background: rgba(245, 210, 138, 0.18);
    transform: translateX(4px);
}

.quiz-btn:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; }

.quiz-result { animation: step-in 0.4s ease both; }

.result-label {
    font-family: var(--font-serif);
    font-size: 0.8rem;
    letter-spacing: 0.3em;
    text-align: center;
    color: var(--color-accent);
    margin: 0 0 12px;
}

.result-text {
    font-family: var(--font-serif);
    font-size: 0.98rem;
    line-height: 2;
    color: var(--color-text);
    min-height: 6em;
    margin-bottom: 18px;
}

/* ---------- 波の区切り ---------- */

.wave-divider {
    position: relative;
    line-height: 0;
    margin-top: -1px;
}

.wave-divider svg {
    display: block;
    width: 100%;
    height: 64px;
}

.wave-to-alt svg path { fill: var(--color-bg-alt); }
.wave-to-bg svg path { fill: var(--color-bg); }

/* ============================================================
   2. 川下り型人生 — 思想
   ============================================================ */

.section { padding: 88px 0 0; }

.philosophy-section { background: var(--color-bg-alt); }

.section-head {
    text-align: center;
    margin-bottom: 64px;
}

.section-kicker {
    font-family: var(--font-sans);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.3em;
    color: var(--color-accent);
    margin: 0 0 14px;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(1.6rem, 3.2vw, 2.3rem);
    font-weight: 700;
    line-height: 1.6;
    color: var(--color-primary);
    margin: 0;
}

.section-lede {
    font-size: 1rem;
    line-height: 2;
    color: var(--color-text-muted);
    max-width: 640px;
    margin: 20px auto 0;
}

.philosophy-layout {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 72px;
    align-items: start;
    padding-bottom: 96px;
}

/* 縦書きの荘子 */
.tategaki-quote {
    writing-mode: vertical-rl;
    height: 420px;
    padding: 28px 20px;
    background: var(--color-surface);
    border: 1px solid rgba(200, 144, 58, 0.3);
    border-radius: 6px;
    box-shadow: var(--shadow-soft);
    position: sticky;
    top: calc(var(--header-height) + 32px);
}

.tategaki-text {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-weight: 700;
    line-height: 2.4;
    letter-spacing: 0.18em;
    color: var(--color-primary);
    margin: 0;
}

.tategaki-cite {
    font-family: var(--font-serif);
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    color: var(--color-text-muted);
    margin: 0 1.6em 0 0;
    align-self: flex-end;
}

/* 飛び石（3つの思想） */
.philosophy-stones {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 48px;
    padding-left: 56px;
}

.stones-river {
    position: absolute;
    left: 12px;
    top: 0;
    width: 56px;
    height: 100%;
    pointer-events: none;
}

.stones-river-path {
    fill: none;
    stroke: var(--river-gold);
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-dasharray: 5 12;
    animation: river-flow 30s linear infinite;
}

.stone {
    position: relative;
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 30px 32px;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(26, 5, 51, 0.05);
    max-width: 620px;
}

.stone:nth-child(odd) { align-self: flex-start; }
.stone:nth-child(3) { align-self: flex-end; }

.stone-no {
    position: absolute;
    top: -16px;
    left: 26px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    background: var(--color-primary);
    border-radius: 50%;
    box-shadow: 0 4px 10px rgba(26, 5, 51, 0.25);
}

.stone-title {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: 8px 0 12px;
}

.stone-body {
    font-size: 0.96rem;
    line-height: 2;
    color: var(--color-text);
    margin: 0 0 14px;
}

.stone-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    background: rgba(245, 210, 138, 0.25);
    border-radius: 999px;
    padding: 4px 14px;
    margin: 0;
}

/* ============================================================
   3. AI講座 — 船頭はふたり
   ============================================================ */

.course-section { background: var(--color-bg); padding-bottom: 96px; }

.course-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-bottom: 56px;
}

.course-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    border-top: 4px solid var(--color-accent);
    padding: 34px 28px;
    box-shadow: var(--shadow-soft);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.course-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lift);
}

.course-card-icon {
    color: var(--color-accent);
    margin-bottom: 18px;
}

.course-card-title {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: 0 0 12px;
}

.course-card-body {
    font-size: 0.94rem;
    line-height: 1.95;
    color: var(--color-text);
    margin: 0;
}

.course-cta { text-align: center; }

.course-cta-note {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin: 14px 0 0;
}

/* ============================================================
   4. おっちゃんの帳面 — note
   ============================================================ */

.note-section {
    background: var(--color-bg);
    padding-bottom: 0;
}

.note-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    padding-bottom: 96px;
}

.note-intro .section-title { text-align: left; }
.note-intro .section-kicker { text-align: left; }

.note-intro-body {
    font-size: 0.98rem;
    line-height: 2.1;
    color: var(--color-text);
    margin: 22px 0 30px;
}

.note-stat {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 32px;
}

.note-stat-num {
    font-family: var(--font-serif);
    font-size: 3.2rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
}

.note-stat-num small { font-size: 0.5em; }

.note-stat-label {
    font-size: 0.9rem;
    font-weight: 700;
    line-height: 1.6;
    color: var(--color-primary);
}

.note-stat-label small {
    font-weight: 400;
    color: var(--color-text-muted);
}

/* 帳面のページ（手書き風引用） */
.note-pages {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.note-page {
    background: var(--color-surface);
    background-image: repeating-linear-gradient(
        to bottom,
        transparent 0,
        transparent 35px,
        var(--paper-line) 35px,
        var(--paper-line) 36px
    );
    border-radius: 4px;
    border: 1px solid rgba(26, 5, 51, 0.08);
    box-shadow: var(--shadow-soft);
    padding: 28px 30px 22px;
    margin: 0;
    transform: rotate(-1.2deg);
}

.note-page-offset { transform: rotate(1deg) translateX(20px); }

.note-page p {
    font-family: var(--font-serif);
    font-size: 1.02rem;
    line-height: 36px; /* 罫線に乗せる */
    color: var(--color-text);
    margin: 0 0 10px;
}

.note-page footer {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    text-align: right;
}

/* ============================================================
   5. Kindle — 舟に積んだ本
   ============================================================ */

.kindle-section {
    background: var(--color-bg-alt);
    padding-bottom: 0;
}

.kindle-shelf {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    padding-bottom: 96px;
}

.kindle-book {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    min-height: 230px;
    background: var(--color-surface);
    border-radius: 10px;
    border: 1px solid rgba(26, 5, 51, 0.08);
    box-shadow: var(--shadow-soft);
    padding: 26px 26px 26px 38px;
    text-decoration: none;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.kindle-book:hover {
    transform: translateY(-6px) rotate(-0.5deg);
    box-shadow: var(--shadow-lift);
}

.kindle-book-spine {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 14px;
    background: linear-gradient(to right, var(--color-primary), var(--color-primary-700));
}

.kindle-book:nth-child(2) .kindle-book-spine {
    background: linear-gradient(to right, var(--color-accent), var(--color-accent-light));
}

.kindle-book-title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.7;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.kindle-book-meta {
    font-size: 0.84rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

.kindle-book-more {
    justify-content: center;
    align-items: center;
    background: transparent;
    border: 2px dashed rgba(26, 5, 51, 0.2);
    box-shadow: none;
    padding-left: 26px;
}

.kindle-book-more .kindle-book-title { color: var(--color-accent); }
.kindle-book-more:hover { border-color: var(--color-accent); }

/* ============================================================
   6. 船頭に聞いてみる — Fable 5 実演FAQ
   ============================================================ */

.ask-section {
    background: var(--color-bg);
    padding-bottom: 110px;
}

.ask-board {
    background: var(--color-surface);
    border-radius: var(--radius);
    border: 1px solid rgba(200, 144, 58, 0.3);
    box-shadow: var(--shadow-lift);
    padding: 36px 36px 40px;
}

.ask-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 22px;
}

.ask-chip {
    font-family: var(--font-sans);
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--color-primary);
    background: var(--color-bg-alt);
    border: 1.5px solid transparent;
    border-radius: 999px;
    padding: 9px 18px;
    cursor: pointer;
    transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.ask-chip:hover {
    border-color: var(--color-accent);
    background: rgba(245, 210, 138, 0.25);
    transform: translateY(-2px);
}

.ask-chip:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; }

.ask-form {
    display: flex;
    gap: 12px;
}

.ask-input {
    flex: 1;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    color: var(--color-text);
    background: var(--color-bg);
    border: 1.5px solid rgba(26, 5, 51, 0.15);
    border-radius: 999px;
    padding: 13px 22px;
    transition: border-color 0.2s ease;
}

.ask-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(245, 210, 138, 0.35);
}

.ask-submit { white-space: nowrap; }
.ask-submit:disabled { opacity: 0.5; cursor: wait; transform: none; }

.ask-answer {
    margin-top: 28px;
    padding: 24px 26px;
    background: var(--color-bg);
    border-left: 4px solid var(--color-accent);
    border-radius: 6px;
    animation: step-in 0.4s ease both;
}

.ask-answer-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    margin: 0 0 10px;
}

.ask-answer-text {
    font-family: var(--font-serif);
    font-size: 0.98rem;
    line-height: 2.1;
    color: var(--color-text);
    min-height: 3em;
    white-space: pre-wrap;
}

/* ============================================================
   7. 最後のひと漕ぎ — Final CTA
   ============================================================ */

.final-cta-section {
    position: relative;
    background:
        radial-gradient(ellipse 90% 70% at 50% 100%, rgba(200, 144, 58, 0.15), transparent 65%),
        linear-gradient(170deg, var(--color-primary) 0%, var(--color-primary-700) 100%);
    color: #fff;
    padding: 110px 0 90px;
    overflow: hidden;
    text-align: center;
}

.final-river {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    pointer-events: none;
}

.final-river svg { width: 100%; height: 120px; display: block; }

.final-river-line {
    fill: none;
    stroke: rgba(245, 210, 138, 0.35);
    stroke-width: 2;
    stroke-linecap: round;
    stroke-dasharray: 6 14;
    animation: river-flow 28s linear infinite;
}

.final-river-line-2 {
    stroke: rgba(255, 255, 255, 0.15);
    animation-duration: 38s;
}

.final-cta-inner { position: relative; }

.final-kicker {
    font-family: var(--font-sans);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.35em;
    color: var(--color-accent-light);
    margin: 0 0 16px;
}

.final-title {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 3.6vw, 2.6rem);
    font-weight: 700;
    line-height: 1.6;
    margin: 0 0 20px;
}

.final-lede {
    font-size: 1rem;
    line-height: 2.1;
    color: rgba(255, 255, 255, 0.85);
    margin: 0 0 40px;
}

.final-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 18px;
    margin-bottom: 56px;
}

.final-motto {
    font-family: var(--font-serif);
    font-size: 0.88rem;
    letter-spacing: 0.25em;
    color: rgba(245, 210, 138, 0.7);
    margin: 0;
}

/* ============================================================
   出現アニメーション（静かに浮かぶ）
   ============================================================ */

.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; transition: none; }
    .river-line,
    .stones-river-path,
    .final-river-line { animation: none; }
    .stream-cursor { animation: none; }
    .btn, .quiz-btn, .ask-chip, .course-card, .kindle-book { transition: none; }
}

/* ============================================================
   レスポンシブ
   ============================================================ */

@media (max-width: 1024px) {
    .hero-inner {
        grid-template-columns: 1fr;
        gap: 48px;
        padding-bottom: 96px;
    }

    .ticket-card { max-width: 560px; margin: 0 auto; width: 100%; }

    .philosophy-layout {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .tategaki-quote {
        position: static;
        writing-mode: horizontal-tb;
        height: auto;
        max-width: 520px;
        margin: 0 auto;
        text-align: center;
        padding: 24px 28px;
    }

    .tategaki-text { font-size: 1.15rem; line-height: 2; letter-spacing: 0.12em; }
    .tategaki-cite { margin: 10px 0 0; display: block; }

    .course-grid { grid-template-columns: 1fr; max-width: 560px; margin-left: auto; margin-right: auto; }

    .note-layout { grid-template-columns: 1fr; gap: 48px; }
    .note-page-offset { transform: rotate(1deg); }

    .kindle-shelf { grid-template-columns: 1fr; max-width: 560px; margin-left: auto; margin-right: auto; }
    .kindle-book { min-height: 0; }

    .river-gauge { display: none; }
}

@media (max-width: 640px) {
    .sp-only { display: inline; }
    .pc-only { display: none; }

    .section { padding-top: 64px; }
    .section-head { margin-bottom: 44px; }

    .hero { padding-top: calc(var(--header-height) + 44px); }
    .hero-inner { padding-bottom: 72px; }

    .hero-tagline { font-size: clamp(1.7rem, 7.5vw, 2.2rem); }
    .hero-lede { font-size: 0.95rem; }

    .hero-actions { flex-direction: column; align-items: stretch; }
    .hero-actions .btn { justify-content: center; }

    .ticket-card { padding: 26px 20px 22px; }
    .ticket-notch { display: none; }

    .philosophy-stones { padding-left: 36px; gap: 36px; }
    .stones-river { left: 2px; width: 40px; }
    .stone { padding: 26px 22px; }
    .stone:nth-child(3) { align-self: stretch; }

    .philosophy-layout,
    .note-layout,
    .kindle-shelf { padding-bottom: 64px; }
    .course-section { padding-bottom: 64px; }

    .ask-board { padding: 24px 18px 28px; }
    .ask-form { flex-direction: column; }
    .ask-submit { justify-content: center; }
    .ask-section { padding-bottom: 72px; }

    .final-cta-section { padding: 84px 0 64px; }
    .final-actions { flex-direction: column; align-items: center; }
    .final-actions .btn { width: 100%; max-width: 360px; justify-content: center; }
    .final-motto { letter-spacing: 0.15em; }

    .wave-divider svg { height: 40px; }
}