/* ============================================================
   iris-nightlounge.css — 深夜読書ラウンジ
   🌙 黒 × 琥珀 × ランプ光 × Reading Blend 接続版
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;700&family=Noto+Serif+JP:wght@300;500;700&family=IM+Fell+English:ital@0;1&display=swap');

:root {
    --ink:       #e8d8b8;   /* 羊皮紙文字色 */
    --ink-dark:  #c8a878;
    --paper:     #12100c;   /* 黒便箋 */
    --paper2:    #1a160e;
    --amber:     #c8841a;
    --amber2:    #e8a030;
    --amber3:    #f5c060;
    --amber-dim: rgba(200,132,26,0.18);
    --night-bg:  #07090f;
    --shadow:    rgba(0,0,0,0.8);
    --border:    rgba(200,132,26,0.3);
}

* { box-sizing: border-box; }

body {
    background-color: var(--night-bg);
    margin: 0;
    font-family: 'Noto Serif JP', serif;
    color: var(--ink);
    line-height: 1.9;
    display: flex;
    justify-content: center;
    padding: 40px 20px;
}

/* 背景：ランプ光 × 深夜ラウンジ */
.letter-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background:
        radial-gradient(ellipse at 50% 0%,    rgba(200,132,26,0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 20% 80%,   rgba(200,132,26,0.06) 0%, transparent 40%),
        radial-gradient(ellipse at 80% 20%,   rgba(200,132,26,0.04) 0%, transparent 40%),
        linear-gradient(180deg, #07090f 0%, #0a0c12 100%);
    z-index: -1;
}

/* グリッド背景（Reading Blend 継承） */
.letter-overlay::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(200,132,26,0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(200,132,26,0.025) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
}

.letter-container {
    max-width: 700px;
    width: 100%;
    filter: drop-shadow(0 20px 60px var(--shadow));
    opacity: 0;
    transition: opacity 2s ease-in;
}

/* 黒便箋 */
.letter-paper {
    background: linear-gradient(160deg, var(--paper2) 0%, var(--paper) 100%);
    padding: 64px 56px;
    position: relative;
    border-radius: 2px;
    border: 1px solid var(--border);
    /* ランプ光の揺らぎ演出 */
    background-image:
        radial-gradient(ellipse at 30% 10%, rgba(200,132,26,0.06) 0%, transparent 50%);
}

/* 琥珀の光線（上部） */
.letter-paper::before {
    content: '';
    position: absolute;
    top: 0; left: 20%; right: 20%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--amber), transparent);
    opacity: 0.6;
}

/* 装飾枠 */
.letter-paper::after {
    content: '';
    position: absolute;
    top: 16px; bottom: 16px; left: 16px; right: 16px;
    border: 1px solid var(--amber-dim);
    pointer-events: none;
    border-radius: 1px;
}

.letter-header { margin-bottom: 44px; }

.tea-accent {
    font-size: 1.5rem;
    margin-bottom: 14px;
    /* 燃える琥珀イメージ */
    filter: sepia(30%) saturate(150%);
}

.recipient-line {
    font-size: 1.2rem;
    font-weight: 500;
    border-bottom: 1px solid var(--amber);
    display: inline-block;
    letter-spacing: 0.06em;
    color: var(--amber2);
    font-family: 'IM Fell English', serif;
    font-style: italic;
}

.letter-intro { margin-bottom: 30px; font-weight: 300; font-size: 0.97rem; }

.tea-suggestion {
    margin-top: 22px;
    padding: 16px 20px;
    background: rgba(200,132,26,0.07);
    border-left: 2px solid var(--amber);
    font-size: 0.93rem;
    color: var(--ink-dark);
}

.letter-divider {
    border: none;
    border-top: 1px solid rgba(200,132,26,0.25);
    margin: 44px 0;
}

.review-meta { margin-bottom: 30px; }

.read-status {
    font-family: 'Cinzel', serif;
    color: var(--amber);
    font-size: 0.8rem;
    letter-spacing: 3px;
    opacity: 0.8;
}

.review-summary {
    font-size: 1.05rem;
    font-weight: 400;
    color: var(--amber2);
    margin-top: 10px;
    font-family: 'IM Fell English', serif;
    font-style: italic;
}

.letter-body p {
    margin-bottom: 1.6em;
    text-align: justify;
    font-size: 0.96rem;
    color: var(--ink);
}

.letter-footer { margin-top: 64px; text-align: right; }

.closing {
    font-weight: 300;
    color: var(--amber);
    margin-bottom: 24px;
    font-size: 0.95rem;
    letter-spacing: 0.05em;
}

.signature {
    font-size: 1.05rem;
    font-weight: 400;
    font-family: 'IM Fell English', serif;
    font-style: italic;
    color: var(--amber2);
}

.sign-label { color: rgba(200,132,26,0.4); }

@media (max-width: 600px) {
    .letter-paper    { padding: 44px 28px; }
    .recipient-line  { font-size: 1.05rem; }
}

/* ===== Reviewed Work Block ===== */
.work-meta {
    margin: 18px 0 28px;
    padding: 18px 20px;
    border: 1px solid rgba(200, 160, 80, 0.28);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.035);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
}

.work-label {
    margin: 0 0 8px;
    font-size: 0.72rem;
    letter-spacing: 0.18em;
    color: #c8a050;
    opacity: 0.9;
}

.work-title {
    margin: 0 0 10px;
    font-size: 1.28rem;
    line-height: 1.6;
    color: #f3e7c2;
    font-weight: 700;
}

.work-link {
    margin: 0;
    font-size: 0.95rem;
}

.work-link a {
    color: #d8b56a;
    text-decoration: none;
    border-bottom: 1px solid rgba(216, 181, 106, 0.45);
    transition: opacity 0.2s ease, border-color 0.2s ease;
}

.work-link a:hover {
    opacity: 0.82;
    border-color: rgba(216, 181, 106, 0.8);
}