/**
 * Karaoke Score Manager Pro+ (Auth Edition)
 * Refined DAM-Inspired Dark Theme
 */

 :root {
    --dam-bg: #0a001a; /* Deep purple/black background */
    --dam-card-bg: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    --dam-accent-pink: #ff33cc; /* Brighter neon magenta for scores */
    --dam-accent-cyan: #00ffff; /* Bright neon cyan for highlights */
    --dam-accent-yellow: #ffff00; /* Yellow for chart labels */
    --dam-text: #ffffff;
    --dam-text-muted: #b0c4de;
    --dam-border: #334155;
    --dam-glow-pink: 0 0 15px rgba(255, 51, 204, 0.7);
    --dam-glow-cyan: 0 0 15px rgba(0, 255, 255, 0.7);
}

/* 1. 全体コンテナ */
.ksm-container { 
    max-width: 600px; 
    margin: 20px auto; 
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", sans-serif;
    background: var(--dam-bg) linear-gradient(135deg, rgba(255,0,255,0.2) 0%, rgba(0,255,255,0.2) 100%); /* Subtle gradient effect */
    color: var(--dam-text);
    padding: 25px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.8), var(--dam-glow-cyan);
    line-height: 1.6;
    border: 1px solid var(--dam-accent-cyan);
}

/* 2. 認証・ログイン周り */
.ksm-auth-box {
    padding: 30px 20px;
    background: rgba(0, 0, 0, 0.6); /* Darker, semi-transparent background */
    backdrop-filter: blur(10px);
}

.ksm-auth-tabs {
    display: flex;
    margin-bottom: 25px;
    border-bottom: 2px solid var(--dam-border);
}

.ksm-auth-tab {
    flex: 1;
    padding: 12px;
    background: transparent;
    color: var(--dam-text-muted);
    border: none;
    cursor: pointer;
    font-weight: bold;
    transition: 0.3s;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.ksm-auth-tab.active {
    color: var(--dam-accent-cyan);
    border-bottom: 3px solid var(--dam-accent-cyan);
    text-shadow: var(--dam-glow-cyan);
}

.ksm-auth-content {
    display: none;
}

.ksm-auth-content.active {
    display: block;
}

/* ユーザーナビ */
.ksm-user-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding: 12px 15px;
    background: rgba(30, 41, 59, 0.8);
    border-radius: 8px;
    font-size: 0.9em;
    border: 1px solid var(--dam-accent-cyan);
    box-shadow: var(--dam-glow-cyan);
}

.ksm-nav-links a {
    margin-left: 15px;
    color: var(--dam-accent-cyan);
    text-decoration: none;
    font-weight: bold;
    transition: 0.3s;
}

.ksm-nav-links a:hover {
    text-shadow: var(--dam-glow-cyan);
}

/* 3. フォーム要素 */
.ksm-form { 
    background: rgba(15, 23, 42, 0.8);
    padding: 25px; 
    border-radius: 12px; 
    margin-bottom: 30px; 
    border: 1px solid var(--dam-accent-cyan);
    backdrop-filter: blur(8px);
    box-shadow: var(--dam-glow-cyan);
}

.ksm-form h3 { 
    color: var(--dam-accent-cyan); 
    margin: 0 0 20px; 
    font-size: 1.4em; 
    text-shadow: var(--dam-glow-cyan);
    border-bottom: 1px solid var(--dam-accent-cyan);
    padding-bottom: 10px;
}

.ksm-form label { 
    font-size: 0.85em; 
    color: var(--dam-text-muted); 
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.ksm-form input { 
    width: 100%; 
    padding: 12px; 
    margin-bottom: 15px; 
    background: #0f172a;
    border: 1px solid var(--dam-border);
    border-radius: 6px; 
    color: #fff;
    font-size: 16px;
    transition: 0.3s;
}

.ksm-form input:focus {
    border-color: var(--dam-accent-cyan);
    outline: none;
    box-shadow: var(--dam-glow-cyan);
}

/* グリッドレイアウト */
.ksm-grid-inputs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.ksm-grid-inputs.five-cols {
    grid-template-columns: repeat(3, 1fr);
}

.ksm-grid-inputs.four-cols {
    grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 480px) {
    .ksm-grid-inputs.five-cols { grid-template-columns: repeat(5, 1fr); }
    .ksm-grid-inputs.four-cols { grid-template-columns: repeat(4, 1fr); }
}

.ksm-section-label {
    font-size: 0.9em;
    color: var(--dam-accent-cyan);
    margin: 20px 0 10px;
    border-bottom: 1px solid rgba(0, 255, 255, 0.3);
    text-transform: uppercase;
    letter-spacing: 1px;
    text-shadow: var(--dam-glow-cyan);
}

/* 4. ボタン */
.ksm-btn { 
    background: linear-gradient(90deg, #00ffff, #00bfff); 
    color: #000; 
    padding: 14px; 
    border: none; 
    border-radius: 30px; 
    cursor: pointer; 
    font-weight: bold;
    width: 100%;
    margin-top: 15px;
    box-shadow: var(--dam-glow-cyan);
    transition: 0.2s;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.ksm-btn:hover {
    filter: brightness(1.2);
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.9);
}

.ksm-cancel {
    display: block;
    text-align: center;
    margin-top: 15px;
    color: var(--dam-text-muted);
    font-size: 0.85em;
    text-decoration: none;
    transition: 0.3s;
}

.ksm-cancel:hover {
    color: var(--dam-accent-cyan);
    text-shadow: var(--dam-glow-cyan);
}

/* 5. 履歴表示カード */
.ksm-history-title { 
    border-left: 5px solid var(--dam-accent-pink); 
    padding-left: 15px; 
    margin: 40px 0 25px;
    font-size: 1.5em;
    color: var(--dam-accent-pink);
    text-shadow: var(--dam-glow-pink);
}

.ksm-card { 
    background: var(--dam-card-bg);
    padding: 20px; 
    margin-bottom: 25px; 
    border-radius: 12px; 
    border: 1px solid var(--dam-accent-cyan);
    border-left: 5px solid var(--dam-accent-pink);
    box-shadow: var(--dam-glow-cyan);
}

.ksm-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    border-bottom: 1px solid rgba(0, 255, 255, 0.2);
    padding-bottom: 10px;
}

.ksm-song-title {
    font-weight: bold;
    font-size: 1.2em;
    color: var(--dam-accent-cyan);
    text-shadow: var(--dam-glow-cyan);
}

.ksm-key-badge {
    background: var(--dam-accent-cyan);
    color: #000;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8em;
    font-weight: 800;
    box-shadow: var(--dam-glow-cyan);
}

.ksm-flex-body {
    display: flex;
    align-items: center;
    gap: 20px;
}

.ksm-score-area {
    flex: 1;
    text-align: center;
}

.ksm-score-box {
    font-size: 3.5em;
    font-weight: 900;
    color: var(--dam-accent-pink);
    text-shadow: var(--dam-glow-pink), 0 0 30px rgba(255, 51, 204, 0.5);
    line-height: 1;
    margin-bottom: 10px;
}

.ksm-score-unit { 
    font-size: 0.4em; 
    color: var(--dam-text); 
    margin-left: 5px; 
    text-shadow: none;
}

.ksm-sub-stats {
    font-size: 0.8em;
    color: var(--dam-text-muted);
    margin: 8px 0;
    font-weight: bold;
}

.ksm-trend-toggle {
    background: transparent;
    border: 2px solid var(--dam-accent-cyan);
    color: var(--dam-accent-cyan);
    padding: 6px 15px;
    border-radius: 20px;
    font-size: 0.8em;
    cursor: pointer;
    transition: 0.3s;
    font-weight: bold;
    box-shadow: var(--dam-glow-cyan);
}

.ksm-trend-toggle:hover {
    background: rgba(0, 255, 255, 0.2);
    text-shadow: var(--dam-glow-cyan);
}

/* チャート表示 */
.ksm-chart-container {
    flex: 1;
    max-width: 220px;
    height: 220px;
}

.ksm-trend-area {
    margin-top: 20px;
    padding: 15px;
    background: rgba(0,0,0,0.6);
    border-radius: 8px;
    border: 1px dashed var(--dam-accent-cyan);
}

/* アクションエリア */
.ksm-actions { 
    margin-top: 20px; 
    padding-top: 12px; 
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.8em; 
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.ksm-actions a { 
    color: var(--dam-text-muted); 
    text-decoration: none; 
    margin-right: 15px;
    transition: 0.3s; 
}

.ksm-actions a:hover {
    color: var(--dam-accent-cyan);
    text-shadow: var(--dam-glow-cyan);
}

.ksm-delete-link { color: #ef4444 !important; }
.ksm-delete-link:hover { text-shadow: 0 0 10px rgba(239, 68, 68, 0.7) !important; }

.ksm-date { color: #475569; }

/* 6. モバイル対応 */
@media (max-width: 480px) {
    .ksm-flex-body { flex-direction: column; }
    .ksm-chart-container { max-width: 100%; height: 250px; width: 100%; }
    .ksm-score-box { font-size: 3em; }
}