:root {
    --primary-color: #1a237e;
    --primary-light: #534bae;
    --accent-color: #ff6f00;
    --accent-light: #ffa040;
    
    /* ステージごとのメダルカラー定義 */
    --stage-0-color: #534bae;    
    --stage-25-color: #cd7f32;   /* ブロンズ */
    --stage-50-color: #c0c0c0;   /* シルバー */
    --stage-75-color: #ffd700;   /* ゴールド */
    --stage-100-color: #00e5ff;  /* プラチナ/シアンのグロー */

    /* 季節ごとのアクセシビリティ配慮カラー (ダーク背景用) */
    --season-spring: #f48fb1; /* ピンク */
    --season-summer: #81c784; /* グリーン */
    --season-autumn: #ffb74d; /* オレンジ */
    --season-winter: #4fc3f7; /* ブルー */
    
    /* 選択時の文字色 (ハイコントラスト) */
    --season-text-dark: #111111; 

    --bg-color: #0d1117;
    --card-bg: #161b22;
    --text-main: #c9d1d9;
    --text-muted: #8b949e;
    --border-color: #30363d;
}

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

body {
    font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex; flex-direction: column; align-items: center;
    padding: max(10px, env(safe-area-inset-top)) max(10px, env(safe-area-inset-right)) max(10px, env(safe-area-inset-bottom)) max(10px, env(safe-area-inset-left));
    overflow-x: hidden;
}

.container {
    width: 100%; max-width: 600px;
    background-color: var(--bg-color);
    padding: 15px; border-radius: 8px;
}

header { 
    display: flex; justify-content: space-between; align-items: center; 
    margin-bottom: 15px; background-color: var(--card-bg); 
    padding: 10px 15px; border-radius: 8px; border: 1px solid var(--border-color);
}

.header-content { flex: 1; text-align: left; }
.subtitle {
    display: inline-block;
    color: var(--accent-light);
    font-size: 0.8rem; font-weight: bold; margin-bottom: 4px; letter-spacing: 1px;
}
header h1 { font-size: 1.3rem; color: #fff; font-weight: bold; line-height: 1.2;}

.logo-container {
    background-color: #ffffff; /* ロゴの使用規約（文字が見える明るい背景指定）のため白背景を強制 */
    padding: 8px; border-radius: 6px; margin-left: 15px;
    display: flex; justify-content: center; align-items: center;
}
#anniversary-logo {
    width: 90px; height: auto; object-fit: contain; display: block;
}

.observation-info {
    display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px;
    background-color: var(--card-bg); padding: 12px;
    border-radius: 8px; border: 1px solid var(--border-color); margin-bottom: 15px;
}

.input-group { display: flex; flex-direction: column; min-width: 0; }
.input-group.full-width { grid-column: span 2; }
.input-group label { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 4px; font-weight: 500; }
.input-group input,
.input-group textarea {
    background-color: rgba(255, 255, 255, 0.03); border: 1px solid var(--border-color);
    border-radius: 4px; padding: 6px 10px; color: #fff; font-size: 0.85rem; width: 100%;
    box-sizing: border-box; min-width: 0; max-width: 100%;
    font-family: inherit; line-height: 1.35; resize: none;
    -webkit-appearance: none; appearance: none;
    transition: border-color 0.2s, background-color 0.2s;
}
/* iOS/iPadOS Safari の日付フォーム固有幅オーバーフローを防止 */
input[type="date"] {
    min-width: 0;
    width: 100%;
    box-sizing: border-box;
    display: block;
}
.input-group input:focus,
.input-group textarea:focus { outline: none; border-color: var(--accent-light); background-color: rgba(255, 255, 255, 0.06); }

/* --- ダッシュボード・メダル --- */
.dashboard {
    position: relative; /* 左右装飾のため */
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 15px; background-color: var(--card-bg); padding: 20px;
    border-radius: 8px; margin-bottom: 15px; border: 1px solid var(--border-color);
    overflow: hidden; /* 光が外に漏れないように */
    transition: background 1s ease;
}

/* ダッシュボード左右の派手な演出 */
.side-decor {
    position: absolute; top: 0; bottom: 0; width: 30%; pointer-events: none;
    display: flex; flex-direction: column; justify-content: space-around; align-items: center;
    opacity: 0; transition: opacity 1s ease;
}
.left-decor { left: 0; }
.right-decor { right: 0; }

.fx-star {
    font-size: 1.5rem; opacity: 0; transform: scale(0.5);
}

/* 装飾の段階的表示 (背景グロー効果＋パーティクル) */
.dashboard.stage-0 {
    background: var(--card-bg);
}
.dashboard.stage-25 {
    background: radial-gradient(circle at -10% 50%, rgba(205,127,50,0.1) 0%, transparent 60%),
                radial-gradient(circle at 110% 50%, rgba(205,127,50,0.1) 0%, transparent 60%),
                var(--card-bg);
}
.dashboard.stage-25 .side-decor { opacity: 0.3; }
.dashboard.stage-25 .s1, .dashboard.stage-25 .s4 { animation: popTwinkle 3s infinite alternate; }

.dashboard.stage-50 {
    background: radial-gradient(circle at -10% 50%, rgba(192,192,192,0.15) 0%, transparent 70%),
                radial-gradient(circle at 110% 50%, rgba(192,192,192,0.15) 0%, transparent 70%),
                var(--card-bg);
}
.dashboard.stage-50 .side-decor { opacity: 0.6; }
.dashboard.stage-50 .s1, .dashboard.stage-50 .s2, .dashboard.stage-50 .s4, .dashboard.stage-50 .s5 { 
    animation: popTwinkle 2s infinite alternate; 
}

.dashboard.stage-75 {
    background: radial-gradient(circle at -20% 50%, rgba(255,215,0,0.2) 0%, transparent 80%),
                radial-gradient(circle at 120% 50%, rgba(255,215,0,0.2) 0%, transparent 80%),
                var(--card-bg);
}
.dashboard.stage-75 .side-decor { opacity: 0.9; }
.dashboard.stage-75 .fx-star { animation: popTwinkle 1.5s infinite alternate; }

.dashboard.stage-100 {
    background: linear-gradient(135deg, rgba(255,0,128,0.15), rgba(0,229,255,0.15), rgba(255,215,0,0.15)), var(--card-bg);
    background-size: 200% 200%;
    animation: auroraBG 5s ease infinite;
}
.dashboard.stage-100 .side-decor { opacity: 1; }
.dashboard.stage-100 .fx-star { animation: hyperTwinkle 0.8s infinite alternate; font-size: 2rem; }

@keyframes auroraBG { 0% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } 100% { background-position: 0% 50%; } }
@keyframes popTwinkle { 0% { opacity: 0.2; transform: scale(0.8) rotate(0deg); } 100% { opacity: 1; transform: scale(1.2) rotate(15deg); } }
@keyframes hyperTwinkle { 0% { opacity: 0.5; transform: scale(1) translateY(0); filter: hue-rotate(0deg); } 100% { opacity: 1; transform: scale(1.5) translateY(-5px); filter: hue-rotate(90deg); } }

/* メダル本体 */
.medal-wrapper {
    position: relative; width: 150px; height: 150px; z-index: 10;
    display: flex; justify-content: center; align-items: center;
    background: radial-gradient(circle, #2a2d36 0%, #161b22 70%);
    border-radius: 50%;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5), inset 0 0 10px rgba(0,0,0,0.8);
    border: 2px solid #3d4450;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.progress-ring { position: relative; width: 140px; height: 140px; }
.progress-ring svg { position: absolute; top: 0; left: 0; overflow: visible; }
.ring-bg { fill: none; stroke: var(--border-color); stroke-width: 8; }
.ring-fg {
    fill: none; stroke: var(--stage-0-color); stroke-width: 8; stroke-linecap: round;
    stroke-dasharray: 389.55; stroke-dashoffset: 389.55;
    transition: stroke-dashoffset 0.5s ease-out, stroke 0.5s ease, filter 0.5s;
}

.progress-text {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); text-align: center;
}
#current-count { font-size: 2.2rem; font-weight: bold; color: #fff; text-shadow: 0 2px 4px rgba(0,0,0,0.5); }
.total-count { font-size: 0.9rem; color: var(--text-muted); }

/* メダルの輝きエフェクト (内側) */
.medal-decorations {
    position: absolute; width: 100%; height: 100%; pointer-events: none; opacity: 0; transition: opacity 0.5s;
}
.star-fx {
    position: absolute; color: white; font-size: 1.2rem; font-family: serif; animation: twinkle 1.5s infinite alternate;
}
.star-1 { top: -10px; left: 20px; animation-delay: 0s; }
.star-2 { top: 40px; right: -15px; animation-delay: 0.5s; font-size: 1.5rem; }
.star-3 { bottom: -5px; left: 50%; transform: translateX(-50%); animation-delay: 0.2s; }
@keyframes twinkle { 0% { opacity: 0.3; transform: scale(0.8); } 100% { opacity: 1; transform: scale(1.2); } }

/* ステージごとのメダル装飾 */
.stage-25 .medal-wrapper { border-color: var(--stage-25-color); box-shadow: 0 0 10px rgba(205,127,50,0.3); }
.stage-25 .ring-fg { stroke: var(--stage-25-color); filter: drop-shadow(0 0 2px var(--stage-25-color)); }
.stage-25 #current-count { color: #ffe0b2; }

.stage-50 .medal-wrapper { border-color: var(--stage-50-color); box-shadow: 0 0 15px rgba(192,192,192,0.4), inset 0 0 10px rgba(192,192,192,0.1); }
.stage-50 .ring-fg { stroke: var(--stage-50-color); filter: drop-shadow(0 0 4px var(--stage-50-color)); }
.stage-50 .medal-decorations { opacity: 0.5; }
.stage-50 #current-count { color: #f5f5f5; }

.stage-75 .medal-wrapper { border-color: var(--stage-75-color); box-shadow: 0 0 25px rgba(255,215,0,0.5), inset 0 0 15px rgba(255,215,0,0.2); }
.stage-75 .ring-fg { stroke: var(--stage-75-color); filter: drop-shadow(0 0 6px var(--stage-75-color)); }
.stage-75 .medal-decorations { opacity: 0.8; }
.stage-75 .star-fx { color: var(--stage-75-color); }
.stage-75 #current-count { color: #fff8e1; }

.stage-100 .medal-wrapper {
    border-color: var(--stage-100-color);
    box-shadow: 0 0 30px rgba(0,229,255,0.7), inset 0 0 20px rgba(0,229,255,0.3);
}
.stage-100 .ring-fg { stroke: var(--stage-100-color); filter: drop-shadow(0 0 10px var(--stage-100-color)); }
.stage-100 .medal-decorations { opacity: 1; }
.stage-100 .star-fx { color: var(--stage-100-color); font-size: 1.5rem; animation: twinkle-fast 0.6s infinite alternate; }
.stage-100 #current-count { color: #ffffff; text-shadow: 0 0 10px rgba(0,229,255,0.8); }
@keyframes twinkle-fast { 0% { opacity: 0.5; transform: scale(1); } 100% { opacity: 1; transform: scale(1.4); } }

.status-container { text-align: center; z-index: 10; position: relative;}
#achievement-title { font-size: 1.3rem; margin-bottom: 5px; font-weight: bold; letter-spacing: 1px; color:#fff;}
#achievement-message { font-size: 0.9rem; color: var(--text-main); line-height: 1.4; }

/* --- 凡例 --- */
.legend {
    display: flex; gap: 10px; font-size: 0.75rem; color: var(--text-muted); padding: 5px 0;
    width: 100%; justify-content: center; margin-bottom: 5px;
}
.legend-item { display: inline-flex; align-items: center; border: 1px solid; padding: 2px 6px; border-radius: 4px; }
.legend-item[data-season="春"] { border-color: var(--season-spring); color: var(--season-spring); }
.legend-item[data-season="夏"] { border-color: var(--season-summer); color: var(--season-summer); }
.legend-item[data-season="秋"] { border-color: var(--season-autumn); color: var(--season-autumn); }
.legend-item[data-season="冬"] { border-color: var(--season-winter); color: var(--season-winter); }

/* --- コントロール・ソート --- */
.controls-panel {
    display: flex; justify-content: space-between; align-items: center;
    width: 100%; margin-bottom: 5px; padding: 0 5px; flex-wrap: wrap; gap: 8px;
}
.setting-group { display: flex; align-items: center; font-size: 0.8rem; }
.checkbox-label { display: flex; align-items: center; color: var(--text-muted); cursor: pointer; user-select: none; }
.checkbox-label input { display: none; }
.custom-check {
    display: inline-block; width: 14px; height: 14px; border: 1px solid var(--text-muted);
    border-radius: 3px; margin-right: 6px; position: relative; transition: all 0.2s;
}
.checkbox-label input:checked + .custom-check { background-color: var(--accent-light); border-color: var(--accent-light); }
.checkbox-label input:checked + .custom-check::after {
    content: ''; position: absolute; left: 4px; top: 1px; width: 4px; height: 8px;
    border: solid #000; border-width: 0 2px 2px 0; transform: rotate(45deg);
}
.sort-group label { margin-right: 5px; color: var(--text-muted); }
.sort-group select {
    background-color: var(--card-bg); color: #fff; border: 1px solid var(--border-color);
    border-radius: 4px; padding: 4px; font-size: 0.75rem; cursor: pointer;
}

/* 夜間赤色モード切替ボタン */
.night-mode-btn {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.76rem;
    font-weight: bold;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s ease;
    user-select: none;
}
.night-mode-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}
.night-mode-btn .night-icon {
    font-size: 0.85rem;
}

/* --- グリッドとボタン (色分け) --- */
.messier-grid {
    display: grid; grid-template-columns: repeat(11, 1fr); gap: 4px;
    background-color: var(--card-bg); padding: 10px; border-radius: 8px; border: 1px solid var(--border-color);
}

.messier-btn {
    aspect-ratio: 1 / 1; 
    background-color: var(--bg-color); color: var(--text-main);
    border: 1px solid var(--border-color); border-radius: 3px;
    display: flex; flex-direction: column; justify-content: center; align-items: center;
    cursor: pointer; user-select: none; transition: all 0.2s ease;
}

/* 季節カラー枠線 (未選択時) */
.messier-btn[data-season="春"] { border-color: var(--season-spring); color: var(--season-spring); }
.messier-btn[data-season="夏"] { border-color: var(--season-summer); color: var(--season-summer); }
.messier-btn[data-season="秋"] { border-color: var(--season-autumn); color: var(--season-autumn); }
.messier-btn[data-season="冬"] { border-color: var(--season-winter); color: var(--season-winter); }

.messier-btn:hover { filter: brightness(1.2); }

/* 選択時 (背景が季節カラーになる、文字色はハイコントラストな黒) */
.messier-btn.observed {
    box-shadow: inset 0 0 10px rgba(255,255,255,0.4); font-weight: bold;
}
.messier-btn.observed[data-season="春"] { background-color: var(--season-spring); color: var(--season-text-dark); border-color: var(--season-spring); }
.messier-btn.observed[data-season="夏"] { background-color: var(--season-summer); color: var(--season-text-dark); border-color: var(--season-summer); }
.messier-btn.observed[data-season="秋"] { background-color: var(--season-autumn); color: var(--season-text-dark); border-color: var(--season-autumn); }
.messier-btn.observed[data-season="冬"] { background-color: var(--season-winter); color: var(--season-text-dark); border-color: var(--season-winter); }

.m-id { font-size: 0.75rem; line-height: 1; }

.m-info {
    font-size: 0.45rem; line-height: 1.1; color: var(--text-muted);
    text-align: center; display: block; margin-top: 2px;
}
.messier-btn.observed .m-info { color: rgba(0, 0, 0, 0.7); font-weight: normal; }

/* --- アクション・共有パネル --- */
.action-panel {
    width: 100%; max-width: 600px; margin-top: 10px;
    background-color: var(--card-bg); border-radius: 8px;
    border: 1px solid var(--border-color); padding: 12px;
}

.image-mode-options {
    display: flex; align-items: center; justify-content: center; gap: 15px;
    font-size: 0.8rem; color: var(--text-muted); margin-bottom: 10px;
    padding-bottom: 8px; border-bottom: 1px solid rgba(255,255,255,0.05);
}
.option-title { font-weight: bold; color: var(--text-main); }
.radio-label { display: inline-flex; align-items: center; gap: 4px; cursor: pointer; }
.radio-label input { accent-color: var(--accent-color); cursor: pointer; }

.action-buttons {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px;
}
.btn {
    padding: 10px 12px; border: none; border-radius: 6px;
    font-size: 0.85rem; font-weight: bold; cursor: pointer;
    transition: all 0.2s; display: inline-flex; align-items: center; justify-content: center;
    text-align: center; line-height: 1.2;
}
.btn:hover { opacity: 0.9; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary { background-color: var(--accent-color); color: #fff; grid-column: span 2; font-size: 0.95rem; padding: 12px; }
.btn-secondary { background-color: transparent; color: var(--text-muted); border: 1px solid var(--border-color); }
.btn-info { background-color: #2196f3; color: #fff; }
.btn-accent { background-color: #00897b; color: #fff; }

/* --- 簡易レポート モーダル --- */
.modal-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(0, 0, 0, 0.75);
    display: flex; justify-content: center; align-items: center;
    z-index: 1000; padding: 15px; backdrop-filter: blur(4px);
}
.modal-content {
    background-color: var(--card-bg); border: 1px solid var(--border-color);
    border-radius: 10px; width: 100%; max-width: 540px; max-height: 90vh;
    display: flex; flex-direction: column; box-shadow: 0 10px 30px rgba(0,0,0,0.8);
    overflow: hidden;
}
.modal-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 12px 16px; border-bottom: 1px solid var(--border-color);
    background-color: rgba(255,255,255,0.02);
}
.modal-header h3 { font-size: 1rem; color: #fff; }
.modal-close {
    background: none; border: none; color: var(--text-muted);
    font-size: 1.5rem; line-height: 1; cursor: pointer; padding: 0 5px;
}
.modal-close:hover { color: #fff; }
.modal-body {
    padding: 16px; overflow-y: auto; display: flex; flex-direction: column; gap: 10px;
}
.report-meta {
    font-size: 0.8rem; color: var(--text-muted); line-height: 1.5;
    background-color: rgba(0,0,0,0.2); padding: 8px 12px; border-radius: 6px;
}
.report-controls {
    display: flex; align-items: center; gap: 8px; font-size: 0.8rem; color: var(--text-muted);
}
.report-controls select {
    background-color: var(--bg-color); color: #fff; border: 1px solid var(--border-color);
    border-radius: 4px; padding: 4px 8px; font-size: 0.8rem; cursor: pointer; flex: 1;
}
.report-textarea {
    width: 100%; height: 220px; background-color: var(--bg-color);
    border: 1px solid var(--border-color); border-radius: 6px;
    color: #fff; padding: 10px; font-family: monospace; font-size: 0.8rem;
    resize: vertical; line-height: 1.4; outline: none;
}
.report-textarea:focus { border-color: var(--accent-light); }
.modal-footer {
    display: flex; justify-content: flex-end; gap: 10px; padding: 12px 16px;
    border-top: 1px solid var(--border-color); background-color: rgba(255,255,255,0.02);
}

/* --- トースト通知 --- */
.toast {
    position: fixed; bottom: 25px; left: 50%; transform: translateX(-50%);
    background-color: #00e676; color: #000; font-weight: bold;
    padding: 10px 20px; border-radius: 20px; font-size: 0.85rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5); z-index: 2000;
    pointer-events: none; transition: opacity 0.3s, transform 0.3s;
}

/* --- レスポンシブ (タブレット縦向き・iPad mini等 最適化) --- */
@media (max-width: 768px) {
    /* タブレット縦向きで入力欄の横幅窮屈や被りを防ぐため1列に整列 */
    .observation-info {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    .input-group.full-width { grid-column: span 1; }
}

/* --- レスポンシブ (スマホ向け最適化) --- */
@media (max-width: 480px) {
    body { padding: 5px; }
    .container { padding: 10px; }
    header { flex-direction: column; text-align: center; gap: 8px; padding: 10px; }
    .header-content { text-align: center; }
    header h1 { font-size: 1.15rem; }
    .logo-container { margin-left: 0; width: auto; max-width: 130px; }
    
    /* スマホで入力欄の重なり・崩れを防ぐため1列に整列 */
    .observation-info {
        grid-template-columns: 1fr;
        gap: 8px;
        padding: 10px;
    }
    .input-group.full-width { grid-column: span 1; }
    .input-group label { font-size: 0.72rem; }
    .input-group input {
        font-size: 0.85rem;
        padding: 6px 8px;
    }

    .messier-grid { grid-template-columns: repeat(10, 1fr); gap: 2.5px; padding: 6px; }
    .m-id { font-size: 0.65rem; }
    .m-info { font-size: 0.38rem; letter-spacing: -0.5px; }
    .medal-wrapper { width: 120px; height: 120px; }
    .progress-ring { width: 110px; height: 110px; }
    .progress-ring svg { width: 110px; height: 110px; }
    .progress-ring svg g { transform: rotate(-90 55 55) scale(0.785); }
    #current-count { font-size: 1.8rem; }
    .controls-panel { flex-direction: column; align-items: stretch;}
    .setting-group { justify-content: center; }
    .dashboard { padding: 15px 10px; }

    .action-buttons { grid-template-columns: 1fr; }
    .btn-primary { grid-column: span 1; }
}

.capture-text { display: none; }

/* --- 画像キャプチャ専用スタイル (保存時の視認性向上) --- */
.is-capturing .input-group input,
.is-capturing .input-group textarea {
    display: none !important; /* フォーム要素は非表示にし、確実に折り返されるdivを表示 */
}
.is-capturing .input-group .capture-text {
    display: block !important; 
    color: #ffffff !important; 
    font-weight: bold !important; 
    font-size: 0.82rem !important; 
    line-height: 1.35 !important;
    white-space: pre-wrap !important;
    word-break: break-all !important;
    min-height: 16px !important;
}
.is-capturing .input-group label {
    font-weight: bold; color: #c9d1d9;
}
.is-capturing .m-info {
    font-weight: 900; color: #ffffff !important;
    text-shadow: 1px 1px 0 #000, -1px -1px 0 #000, 1px -1px 0 #000, -1px 1px 0 #000;
}
.is-capturing .messier-btn.observed .m-info {
    color: #000000 !important;
    text-shadow: 1px 1px 0 #fff, -1px -1px 0 #fff, 1px -1px 0 #fff, -1px 1px 0 #fff;
    font-size: 0.5rem;
}
.is-capturing .m-id { font-weight: 900; }
.is-capturing .medal-wrapper {
    box-shadow: none !important;
}

/* --- SNS用 正方形 (1:1) 左右2分割レイアウト --- */
.is-square-mode {
    width: 800px !important;
    max-width: 800px !important;
    height: 800px !important;
    max-height: 800px !important;
    box-sizing: border-box !important;
    display: grid !important;
    grid-template-columns: 270px 1fr !important; /* 左側270px、右側約500pxの理想配分 */
    grid-template-rows: auto auto 1fr !important;
    gap: 12px !important;
    padding: 16px !important;
    background-color: var(--bg-color) !important;
    border-radius: 0 !important;
    overflow: hidden !important;
}

/* 左列：ヘッダー（タイトル改行に対応） */
.is-square-mode header {
    grid-column: 1 !important;
    grid-row: 1 !important;
    margin-bottom: 0 !important;
    padding: 8px 12px !important;
    flex-direction: row !important;
    align-items: center !important;
    justify-content: space-between !important;
    text-align: left !important;
}
.is-square-mode .header-content { text-align: left !important; flex: 1 !important; }
.is-square-mode .subtitle { font-size: 0.7rem !important; margin-bottom: 2px !important; }
.is-square-mode header h1 { 
    font-size: 1.1rem !important; 
    line-height: 1.25 !important; 
    font-weight: bold !important;
}
.is-square-mode .logo-container {
    margin-left: 8px !important;
    max-width: 70px !important;
    padding: 4px !important;
    flex-shrink: 0 !important;
}
.is-square-mode #anniversary-logo { width: 58px !important; height: auto !important; }

/* 左列：観測情報（縦1列配置、見切れを防ぎ複数行も完璧に収める） */
.is-square-mode .observation-info {
    grid-column: 1 !important;
    grid-row: 2 !important;
    margin-bottom: 0 !important;
    padding: 10px 12px !important;
    grid-template-columns: 1fr !important;
    gap: 6px !important;
}
.is-square-mode .input-group { margin-bottom: 0 !important; }
.is-square-mode .input-group.full-width { grid-column: span 1 !important; }
.is-square-mode .input-group label { 
    font-size: 0.68rem !important; 
    color: var(--text-muted) !important; 
    margin-bottom: 2px !important;
    line-height: 1.1 !important;
}
.is-square-mode .input-group .capture-text {
    font-size: 0.8rem !important;
    line-height: 1.35 !important;
}

/* 左列：ダッシュボード（左下スペースにすっきり配置） */
.is-square-mode .dashboard {
    grid-column: 1 !important;
    grid-row: 3 !important;
    margin-bottom: 0 !important;
    height: 100% !important;
    padding: 10px 8px !important;
    display: flex !important;
    flex-direction: column !important;
    justify-content: center !important;
    gap: 6px !important;
}
.is-square-mode .side-decor { display: none !important; }

.is-square-mode .medal-wrapper { 
    width: 96px !important; 
    height: 96px !important; 
    border-width: 2px !important;
}
.is-square-mode .progress-ring { width: 86px !important; height: 86px !important; }
.is-square-mode .progress-ring svg { width: 86px !important; height: 86px !important; }
.is-square-mode .progress-ring svg g { transform: rotate(-90 43 43) scale(0.614) !important; }
.is-square-mode #current-count { font-size: 1.5rem !important; }
.is-square-mode .total-count { font-size: 0.72rem !important; }

.is-square-mode .status-container { margin-top: 2px !important; }
.is-square-mode #achievement-title { 
    font-size: 0.95rem !important; 
    margin-bottom: 2px !important; 
    line-height: 1.2 !important;
}
.is-square-mode #achievement-message { 
    font-size: 0.7rem !important; 
    line-height: 1.25 !important; 
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 右列：不要なコントロール群は非表示 */
.is-square-mode .controls-panel {
    display: none !important;
}

/* 右列：凡例（右上にすっきり配置） */
.is-square-mode .legend {
    grid-column: 2 !important;
    grid-row: 1 !important;
    margin-bottom: 0 !important;
    justify-content: flex-end !important;
    align-self: center !important;
    font-size: 0.72rem !important;
    gap: 6px !important;
    padding: 0 !important;
}
.is-square-mode .legend-item { padding: 1px 5px !important; }

/* 右列：天体リストエリア（空いたスペースを目一杯活用） */
.is-square-mode .messier-section {
    grid-column: 2 !important;
    grid-row: 2 / span 2 !important;
    height: 100% !important;
    display: flex !important;
    flex-direction: column !important;
    justify-content: center !important;
    overflow: hidden !important;
}
.is-square-mode .messier-grid {
    /* minmax(0, 1fr) により、中身の文字で列が押し広げられるのを完全に防止！ */
    grid-template-columns: repeat(11, minmax(0, 1fr)) !important;
    gap: 3px !important;
    height: 100% !important;
    max-height: 680px !important;
    padding: 6px !important;
    align-content: space-evenly !important;
    box-sizing: border-box !important;
    width: 100% !important;
}

/* 正方形モードの天体ボタン：min-width:0で幅オーバーフローを徹底阻止 */
.is-square-mode .messier-btn {
    min-width: 0 !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow: hidden !important;
    padding: 2.5px 0 !important;
    display: flex !important;
    flex-direction: column !important;
    justify-content: center !important;
    align-items: center !important;
}
.is-square-mode .m-id {
    font-size: 0.72rem !important;
    font-weight: 900 !important;
    line-height: 1 !important;
}
.is-square-mode .m-info {
    display: block !important;
    font-size: 0.38rem !important;
    line-height: 1.1 !important;
    margin-top: 1px !important;
    letter-spacing: -0.7px !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-align: center !important;
    width: 100% !important;
}

/* --- 画像プレビュー・保存モーダル --- */
.image-modal-content {
    max-width: 640px;
}
.image-modal-body {
    align-items: center;
    padding: 14px;
    gap: 12px;
}
.image-preview-wrapper {
    width: 100%;
    max-height: 52vh;
    background-color: #05080c;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: auto;
    -webkit-overflow-scrolling: touch;
    box-sizing: border-box;
}
#image-preview {
    max-width: 100%;
    max-height: 48vh;
    height: auto;
    object-fit: contain;
    border-radius: 4px;
    display: block;
    margin: 0 auto;
    /* iOS Safari / WebKit での画像長押し保存を確実に有効化 */
    -webkit-touch-callout: default !important;
    -webkit-user-select: auto !important;
    user-select: auto !important;
    pointer-events: auto !important;
}
.save-guidance {
    width: 100%;
    background-color: rgba(33, 150, 243, 0.12);
    border: 1px solid rgba(33, 150, 243, 0.35);
    border-radius: 6px;
    padding: 8px 12px;
    box-sizing: border-box;
    text-align: left;
}
.save-guidance-text {
    font-size: 0.8rem;
    color: #90caf9;
    margin: 0;
    line-height: 1.45;
}
.save-guidance-text strong {
    color: #e3f2fd;
}
.image-modal-footer {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: flex-end;
}
.image-modal-footer .btn {
    flex: 1 1 auto;
    min-height: 42px;
}

/* --- 診断モーダル --- */
.diagnostics-list {
    background-color: #090d13;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px;
    font-family: Consolas, Monaco, "Courier New", monospace;
    font-size: 0.76rem;
    line-height: 1.5;
    color: #c9d1d9;
    max-height: 280px;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-all;
}
.app-footer {
    text-align: center;
    padding: 16px 10px 30px;
}
.diag-link-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.78rem;
    text-decoration: underline;
    cursor: pointer;
    padding: 6px 12px;
    opacity: 0.75;
    transition: opacity 0.2s, color 0.2s;
}
.diag-link-btn:hover {
    opacity: 1;
    color: var(--accent-light);
}

/* モバイルでのモーダルボタン操作性改善 */
@media (max-width: 480px) {
    .modal-footer {
        flex-direction: column;
    }
    .modal-footer .btn {
        width: 100%;
        min-height: 44px;
    }
    .image-modal-footer .btn {
        width: 100%;
        min-height: 44px;
    }
}

/* ==========================================================================
   夜間用赤色モード（暗順応保護テーマ）
   天体観測現場で星を見る目を保護するため、赤色波長を基調にした低刺激パレット
   ========================================================================== */
body.night-mode {
    --bg-color: #120000;
    --card-bg: #1e0505;
    --text-main: #ff6666;
    --text-muted: #b33636;
    --border-color: #4a0d0d;
    --accent-color: #c42b00;
    --accent-light: #ff4d2e;

    /* 達成度メダルカラー（夜間用：赤〜赤橙系で過剰な発光を防止） */
    --stage-0-color: #3d0a0a;
    --stage-25-color: #8f2300;
    --stage-50-color: #b83200;
    --stage-75-color: #d94500;
    --stage-100-color: #ff3333;

    /* 季節カラー（夜間用：赤色域の階調で区別） */
    --season-spring: #ff5c7c;
    --season-summer: #d94400;
    --season-autumn: #b83300;
    --season-winter: #ff3344;
    --season-text-dark: #1f0202;

    background-color: var(--bg-color);
    color: var(--text-main);
}

/* 夜間モード時のヘッダー・タイトル */
body.night-mode header h1 {
    color: #ff7777;
}

/* ロゴの眩しさを抑制（暗順応保護：白背景の輝度を落とし、赤系統にフィルタ） */
body.night-mode .logo-container {
    background-color: #2b0505;
    border: 1px solid #661111;
}
body.night-mode #anniversary-logo {
    filter: invert(0.85) sepia(1) hue-rotate(310deg) saturate(6) brightness(0.85);
}

/* 入力欄・セレクトボックス */
body.night-mode .input-group input,
body.night-mode .input-group textarea,
body.night-mode .sort-group select,
body.night-mode .report-controls select {
    background-color: rgba(255, 0, 0, 0.05);
    border-color: var(--border-color);
    color: #ff8888;
}
body.night-mode .input-group input:focus,
body.night-mode .input-group textarea:focus {
    border-color: var(--accent-light);
    background-color: rgba(255, 0, 0, 0.1);
}

/* 夜間モード切替ボタンのアクティブ状態 */
body.night-mode .night-mode-btn {
    background-color: rgba(255, 0, 0, 0.22);
    border-color: #ff3333;
    color: #ff9999;
    box-shadow: 0 0 8px rgba(255, 0, 0, 0.4);
}

/* 眩しい星エフェクト・グローの抑制（暗所での刺激軽減） */
body.night-mode .side-decor {
    display: none !important;
}
body.night-mode .fx-star,
body.night-mode .star-fx {
    display: none !important;
}
body.night-mode .medal-wrapper {
    box-shadow: 0 0 10px rgba(255, 0, 0, 0.25) !important;
}
body.night-mode #current-count {
    color: #ff8888 !important;
    text-shadow: none !important;
}
body.night-mode #achievement-title {
    color: #ff7777 !important;
}

/* アクションボタン群 */
body.night-mode .btn-secondary {
    background-color: #2b0a0a;
    border-color: #591616;
    color: #ff7777;
}
body.night-mode .btn-info {
    background-color: #521400;
    border-color: #8c2600;
    color: #ffaa77;
}
body.night-mode .btn-accent {
    background-color: #611500;
    border-color: #a82e00;
    color: #ffaa88;
}
body.night-mode .btn-primary {
    background-color: #851b00;
    border-color: #c43000;
    color: #ffffff;
}
body.night-mode .btn-secondary:hover { background-color: #3d0e0e; }
body.night-mode .btn-info:hover { background-color: #6e1c00; }
body.night-mode .btn-accent:hover { background-color: #7d1c00; }
body.night-mode .btn-primary:hover { background-color: #9e2200; }

/* モーダル群 */
body.night-mode .modal-content {
    background-color: #1e0505;
    border-color: #551111;
    color: #ff7777;
}
body.night-mode .modal-header {
    border-bottom-color: #440d0d;
}
body.night-mode .modal-header h3 {
    color: #ff8888;
}
body.night-mode .modal-footer {
    border-top-color: #440d0d;
}
body.night-mode .modal-close {
    color: #b33636;
}
body.night-mode .modal-close:hover {
    color: #ff6666;
}
body.night-mode .report-meta {
    background-color: #260707;
    border-left-color: #b83200;
    color: #ff8888;
}
body.night-mode .report-textarea {
    background-color: #140202;
    border-color: #440d0d;
    color: #ff8888;
}
body.night-mode .save-guidance {
    background-color: rgba(255, 50, 50, 0.08);
    border-color: rgba(255, 50, 50, 0.25);
}
body.night-mode .save-guidance-text {
    color: #ff8888;
}
body.night-mode .toast {
    background-color: rgba(60, 10, 10, 0.95);
    border-color: #ff4444;
    color: #ff9999;
}
body.night-mode .diagnostics-list {
    background-color: #140202;
    border-color: #440d0d;
    color: #ff7777;
}