@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@700&family=Noto+Sans+JP:wght@400;700&display=swap');

:root {
    --neon-pink: #f929a2;
    --neon-cyan: #00e5ff;
    --neon-green: #4eff81;
    --neon-blue: #3d5afe;
    --background-color: #0d0221;
    --surface-color: rgba(10, 10, 25, 0.7);
    --border-color: rgba(0, 229, 255, 0.4);
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0a0;
    --shadow-cyan: 0 0 5px var(--neon-cyan), 0 0 10px var(--neon-cyan), 0 0 15px var(--neon-cyan);
    --shadow-pink: 0 0 5px var(--neon-pink), 0 0 10px var(--neon-pink), 0 0 15px var(--neon-pink);
}

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

body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: var(--background-color);
    background-image: 
        linear-gradient(rgba(0, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 2.5em 2.5em;
    color: var(--text-primary);
    line-height: 1.6;
}

.app-container { max-width: 1200px; margin: 0 auto; padding: 1rem; }

h1, h2, .ranking-score, .history-score, .stat-value {
    font-family: 'Orbitron', sans-serif;
    text-transform: uppercase;
}

header h1 {
    color: #fff;
    text-shadow: var(--shadow-cyan);
    animation: flicker 4s infinite alternate;
}

.tabs { display: flex; justify-content: center; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; }

.tab {
    padding: 0.75rem 1.5rem; border: 1px solid var(--border-color); background-color: transparent;
    color: var(--neon-cyan); font-weight: 700; cursor: pointer; border-radius: 30px;
    transition: all 0.3s ease; text-shadow: 0 0 3px var(--neon-cyan);
}
.tab:hover { background-color: rgba(0, 255, 255, 0.1); box-shadow: var(--shadow-cyan); }
.tab.active {
    background-color: var(--neon-cyan); color: var(--background-color);
    box-shadow: var(--shadow-cyan); text-shadow: none;
}

.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.5s; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

section {
    background-color: var(--surface-color); backdrop-filter: blur(10px); padding: 1.5rem;
    border-radius: 12px; margin-bottom: 1.5rem; border: 1px solid var(--border-color);
    box-shadow: inset 0 0 15px rgba(0, 255, 255, 0.2);
}
section h2 { color: var(--neon-pink); text-shadow: 0 0 5px var(--neon-pink); margin-bottom: 1rem; }

input, select {
    font-family: inherit; font-size: 1rem; padding: 0.75rem; border-radius: 8px;
    border: 1px solid var(--border-color); background-color: rgba(0,0,0,0.5);
    color: var(--text-primary); width: 100%; transition: all 0.3s ease;
}
input:focus, select:focus { outline: none; box-shadow: var(--shadow-cyan); border-color: var(--neon-cyan); }

button {
    font-family: 'Orbitron', sans-serif; text-transform: uppercase;
    cursor: pointer; font-weight: 700; transition: all 0.2s ease;
    padding: 0.75rem 1.5rem; border-radius: 8px; border: 1px solid;
    background: transparent;
}
.btn-primary { color: var(--neon-pink); border-color: var(--neon-pink); text-shadow: 0 0 5px var(--neon-pink); }
.btn-primary:hover { background-color: var(--neon-pink); color: var(--background-color); box-shadow: var(--shadow-pink); text-shadow: none; }

.btn-secondary { color: var(--neon-cyan); border-color: var(--neon-cyan); text-shadow: 0 0 3px var(--neon-cyan); }
.btn-secondary:hover { background-color: var(--neon-cyan); color: var(--background-color); box-shadow: var(--shadow-cyan); text-shadow: none; }

.btn-danger { color: #ff5252; border-color: #ff5252; text-shadow: 0 0 5px #ff5252; }
.btn-danger:hover { background-color: #ff5252; color: white; box-shadow: 0 0 10px #ff5252; text-shadow: none; }

.btn-small { padding: 0.4rem 0.8rem; font-size: 0.8rem; border-radius: 5px; }

.song-card {
    background: rgba(0,0,0,0.2); border: 1px solid var(--border-color);
    border-radius: 8px; padding: 1rem; transition: all 0.3s ease;
}
.song-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-cyan); border-color: var(--neon-cyan); }

.history-item, .ranking-item {
    display: flex; align-items: center; justify-content: space-between;
    padding: 1rem; margin-bottom: 0.5rem;
    background: rgba(0,0,0,0.2); border-left: 3px solid var(--neon-blue);
    border-radius: 5px; transition: background-color 0.3s;
}
.history-item { grid-template-columns: 1fr auto auto auto; gap: 1rem; display: grid; }
.history-item:hover, .ranking-item:hover { background-color: rgba(0, 255, 255, 0.1); }
.history-header { font-family: 'Orbitron', sans-serif; font-weight: bold; color: var(--neon-cyan); border-left-color: var(--neon-cyan); }
.history-recorded, .history-action { text-align: center; }
.history-recorded { font-size: 1.5rem; }

.ranking-position { font-size: 1.2rem; width: 40px; text-align: center; color: var(--neon-cyan); text-shadow: var(--shadow-cyan); }
.ranking-info, .history-info { flex-grow: 1; }

.stat-value { color: var(--neon-green); text-shadow: 0 0 5px var(--neon-green); }
.history-score, .ranking-score { color: var(--neon-green); text-shadow: 0 0 5px var(--neon-green); }

.modal {
    display: none; position: fixed; z-index: 1000; left: 0; top: 0;
    width: 100%; height: 100%; background-color: rgba(0,0,0,0.7);
    align-items: center; justify-content: center; animation: fadeIn 0.3s;
}
.modal-content {
    background: radial-gradient(circle, #1a0a3a 0%, #0d0221 100%);
    border: 1px solid var(--neon-pink); box-shadow: var(--shadow-pink);
    padding: 2rem; border-radius: 12px; width: 90%; max-width: 600px;
    animation: slideIn 0.3s;
}
@keyframes slideIn { from { transform: translateY(-30px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.chart-container { position: relative; height: 40vh; width: 100%; }

canvas { background: rgba(0,0,0,0.3); border: 1px dashed var(--border-color); border-radius: 8px; padding: 0.5rem; }

.camera-viewfinder { position: relative; width: 100%; aspect-ratio: 16 / 9; background: #000; margin-bottom: 1rem; border-radius: 8px; overflow: hidden; }
#camera-stream { width: 100%; height: 100%; object-fit: cover; }

@keyframes flicker {
    0%, 18%, 22%, 25%, 53%, 57%, 100% { text-shadow: 0 0 4px #fff, 0 0 11px var(--neon-cyan), 0 0 19px var(--neon-cyan), 0 0 40px var(--neon-cyan), 0 0 80px var(--neon-cyan); }
    20%, 24%, 55% { text-shadow: none; }
}