:root {
    /* Base Colors */
    --bg-dark: #05050a;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    /* Theme Colors (Default: Cyan) */
    --accent-main: #00f2ff;
    --accent-glow: rgba(0, 242, 255, 0.5);
    --accent-shadow: rgba(0, 242, 255, 0.2);
    
    /* Secondary & Text */
    --accent-red: #ff0055;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    
    /* Animation */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Fonts */
    --font-main: 'Inter', sans-serif;
    --font-heading: 'Outfit', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-body);
    overflow-x: hidden;
    overflow-y: auto;
    min-height: 100vh;
    width: 100vw;
}

#app {
    position: relative;
    width: 100%;
    min-height: 100vh;
    height: auto;
}

/* --- Background Effects --- */
.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.mesh-gradient {
    position: absolute;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at var(--mouse-x, 20%) var(--mouse-y, 30%), rgba(0, 242, 255, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(255, 0, 85, 0.2) 0%, transparent 50%);
    filter: blur(80px);
    transition: background 0.5s ease;
}

.grid-bg {
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    background-image: 
        linear-gradient(rgba(0, 242, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90(deg), rgba(0, 242, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    transform: perspective(500px) rotateX(60deg);
    animation: grid-move 20s linear infinite;
    z-index: -1;
}

.background-effects::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(0deg, rgba(0,0,0,0.1), rgba(0,0,0,0.1) 1px, transparent 1px, transparent 2px);
    pointer-events: none;
}

#vfx-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

@keyframes grid-move {
    from { transform: perspective(500px) rotateX(60deg) translateY(0); }
    to { transform: perspective(500px) rotateX(60deg) translateY(50px); }
}

/* --- Layout --- */
.container {
    max-width: 500px;
    margin: 0 auto;
    min-height: 100vh;
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 15px 15px 120px 15px; /* 下部に大きな余白を確保 */
}

.screen {
    display: none;
    flex-direction: column;
    align-items: center;
    width: 100%;
    min-height: 100%;
    animation: fadeIn 0.4s ease-out;
    padding-bottom: 40px; /* 余白を確保 */
}

.screen.active {
    display: flex;
}

/* Welcome Screen は上寄せにする（コンテンツ多いため） */
#screen-welcome {
    justify-content: flex-start;
    padding-top: 20px;
}

/* Game Screen は中央寄せ */
#screen-game.active {
    justify-content: center;
    position: fixed; /* プレイ中のみスクロールさせない */
    top: 0; left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 10;
}

/* AdSense Anchor Ad Color Override - デザインへの干渉を防止 */
ins.adsbygoogle, 
.adsbygoogle,
[id^="aswift_"],
#aswift_0_anchor {
    background: var(--bg-dark) !important;
    background-color: var(--bg-dark) !important;
    border: none !important;
}

#screen-countdown, #screen-result {
    justify-content: center;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Typography --- */
h1.glitch {
    font-family: var(--font-heading);
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: 2px;
    position: relative;
    color: var(--text-primary);
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.8;
}

.glitch::before {
    color: var(--accent-cyan);
    z-index: -1;
    animation: glitch-anim 2s infinite linear alternate-reverse;
}

.glitch::after {
    color: var(--accent-crimson);
    z-index: -2;
    animation: glitch-anim2 3s infinite linear alternate-reverse;
}

@keyframes glitch-anim {
    0% { transform: translate(0); }
    20% { transform: translate(-2px, 2px); }
    40% { transform: translate(-2px, -2px); }
    60% { transform: translate(2px, 2px); }
    80% { transform: translate(2px, -2px); }
    100% { transform: translate(0); }
}

@keyframes glitch-anim2 {
    0% { transform: translate(0); }
    20% { transform: translate(2px, -2px); }
    40% { transform: translate(2px, 2px); }
    60% { transform: translate(-2px, -2px); }
    80% { transform: translate(-2px, 2px); }
    100% { transform: translate(0); }
}

.sub-logo {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    letter-spacing: 8px;
    color: var(--accent-cyan);
    margin-top: -5px;
    text-shadow: 0 0 10px var(--accent-cyan);
}

/* --- Components --- */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 20px;
    width: 100%;
    margin-top: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.user-input-group {
    margin-bottom: 25px;
    text-align: left;
}

.user-input-group label {
    font-size: 0.65rem;
    font-weight: 800;
    color: var(--accent-cyan);
    margin-bottom: 5px;
    display: block;
    letter-spacing: 2px;
}

.stage-grid {
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    width: 100%;
    margin: 10px 0;
}

.stage-grid.active { display: grid; animation: fadeIn 0.3s ease; }

/* --- World Tabs --- */
.world-tabs {
    display: flex;
    gap: 10px;
    margin: 15px 0;
    justify-content: center;
}

.world-tab {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 8px 15px;
    color: var(--text-secondary);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.8rem;
    transition: var(--transition);
    cursor: pointer;
}

.world-tab.active {
    background: var(--accent-main);
    color: var(--bg-dark);
    border-color: var(--accent-main);
    box-shadow: 0 0 15px var(--accent-glow);
}

.world-tab.locked {
    opacity: 0.4;
    cursor: not-allowed;
}

/* --- Boss UI --- */
.boss-ui {
    position: absolute;
    top: 25%;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    text-align: center;
    z-index: 5;
}

.boss-hp-bar {
    width: 100%;
    height: 10px;
    background: rgba(255, 0, 85, 0.2);
    border: 1px solid var(--accent-red);
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 20px;
}

.boss-hp-bar .fill {
    height: 100%;
    background: var(--accent-red);
    width: 100%;
    transition: width 0.1s ease;
    box-shadow: 0 0 15px var(--accent-red);
}

.boss-image-container {
    width: 140px;
    height: 140px;
    margin: 0 auto;
    filter: drop-shadow(0 0 30px var(--accent-red));
}

.boss-image-container img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    animation: floating-boss 3s ease-in-out infinite;
}

@keyframes floating-boss {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-15px) scale(1.05); }
}

/* --- Gravity Reverse --- */
.gravity-rev-mode .main-display {
    transform: rotate(180deg);
    transition: transform 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.gravity-rev-mode .big-number,
.gravity-rev-mode .feedback-text {
    transform: rotate(-180deg);
}

.stage-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 15px;
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stage-card .id {
    font-family: var(--font-heading);
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.stage-card .name {
    display: block;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 0.9rem;
    margin-top: 5px;
}

.stage-card .desc {
    font-size: 0.65rem;
    color: var(--text-secondary);
}

.stage-card.active {
    background: rgba(0, 242, 255, 0.05);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 20px rgba(0, 242, 255, 0.2);
}

.stage-card.active .name { color: var(--accent-cyan); }

.user-input-group input {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 14px;
    width: 100%;
    color: white;
    font-family: var(--font-heading);
    font-size: 1rem;
    letter-spacing: 1px;
    transition: var(--transition);
}

.user-input-group input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    background: rgba(0, 242, 255, 0.05);
    box-shadow: 0 0 15px rgba(0, 242, 255, 0.2);
}

.btn-primary {
    background: var(--accent-cyan);
    color: var(--bg-dark);
    border: none;
    border-radius: 12px;
    padding: 14px 28px;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.1rem;
    cursor: pointer;
    width: 100%;
    margin-top: 15px;
    transition: var(--transition);
    box-shadow: 0 0 20px rgba(0, 242, 255, 0.4);
}

.btn-primary:active {
    transform: scale(0.95);
    box-shadow: 0 0 10px rgba(0, 242, 255, 0.2);
}

.mode-selector {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.mode-btn {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.mode-btn.active {
    background: rgba(0, 242, 255, 0.1);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.mode-btn .icon { font-size: 1.5rem; margin-bottom: 5px; }
.mode-btn .label { font-size: 0.8rem; font-weight: 700; }

.safety-info {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-align: center;
    margin: 10px 0;
    line-height: 1.5;
}

/* --- Game Screen --- */
.game-header {
    width: 100%;
    padding: 20px 0;
}

.label {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 4px;
}

.timer-bar, .ghost-bar {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
}

.progress {
    height: 100%;
    width: 100%;
    background: var(--accent-cyan);
    transition: width 0.1s linear;
}

#progress-ghost {
    background: rgba(255, 255, 255, 0.3);
}

#time-left {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 800;
    text-align: right;
    display: block;
    width: 100%;
    margin-top: 5px;
}

.main-display {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

/* --- Combo Display --- */
.combo-container {
    position: absolute;
    top: 15%;
    display: none;
    flex-direction: column;
    align-items: center;
    pointer-events: none;
    z-index: 5;
    animation: bounce-in 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.combo-container.active { display: flex; }

#combo-count {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--accent-main);
    text-shadow: 0 0 20px var(--accent-glow), 0 0 40px var(--accent-shadow);
    line-height: 1;
}

.combo-container .label {
    font-size: 0.8rem;
    color: var(--text-primary);
    letter-spacing: 4px;
    margin-top: -5px;
}

/* --- Security & Alert --- */
.turnstile-container {
    margin: 15px auto;
    min-height: 65px;
    display: flex;
    justify-content: center;
}

.security-alert {
    background: rgba(255, 0, 85, 0.1);
    border: 1px solid var(--accent-red);
    color: var(--accent-red);
    padding: 10px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 800;
    margin-bottom: 20px;
    animation: flash-red 0.5s infinite alternate;
}

@keyframes flash-red {
    from { opacity: 1; box-shadow: 0 0 0px var(--accent-red); }
    to { opacity: 0.7; box-shadow: 0 0 15px var(--accent-red); }
}

@keyframes bounce-in {
    0% { transform: scale(0.5); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

/* --- Pulse & Effects --- */
.beat-circle { border-color: var(--accent-main); }
.big-number { text-shadow: 0 0 30px var(--accent-glow); }
.btn-primary { background: var(--accent-main); box-shadow: 0 0 20px var(--accent-glow); }
.progress { background: var(--accent-main); box-shadow: 0 0 10px var(--accent-glow); }
.stage-card.active { border-color: var(--accent-main); box-shadow: 0 0 20px var(--accent-shadow); }

/* --- Garage (Skin UI) --- */
.garage-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.2rem;
    z-index: 100;
    transition: var(--transition);
}

.garage-btn:hover { border-color: var(--accent-main); transform: scale(1.1); }

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(10px);
    z-index: 200;
    justify-content: center;
    align-items: center;
}

.modal.active { display: flex; animation: fade-in 0.3s ease; }

.modal-content {
    background: var(--bg-dark);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 30px;
    width: 90%;
    max-width: 400px;
    text-align: center;
}

.skin-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-top: 20px;
}

.skin-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 15px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    opacity: 0.5;
}

.skin-item.unlocked { opacity: 1; }
.skin-item.active { border-color: var(--accent-main); box-shadow: 0 0 15px var(--accent-shadow); }
.skin-item.locked::after {
    content: "🔒";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
}

.skin-color {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    margin: 0 auto 10px;
}

.skin-item .name { font-size: 0.8rem; font-weight: 700; display: block; }
.skin-item .condition { font-size: 0.6rem; color: var(--text-secondary); }

/* --- Unlock Toast --- */
.unlock-toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(150px);
    background: var(--accent-main);
    color: var(--bg-dark);
    padding: 15px 25px;
    border-radius: 40px;
    font-weight: 800;
    z-index: 300;
    opacity: 0;
    visibility: hidden;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    pointer-events: none;
}

.unlock-toast.show { 
    transform: translateX(-50%) translateY(0); 
    opacity: 1;
    visibility: visible;
}

.beat-pulse {
    animation: beat-grow 0.5s ease-out;
}

@keyframes beat-grow {
    0% { transform: scale(0.5); opacity: 0.8; }
    100% { transform: scale(1.5); opacity: 0; }
}

.feedback-text {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-cyan);
    letter-spacing: 2px;
    margin-top: 20px;
    text-transform: uppercase;
    animation: pulse 1s infinite alternate;
}

@keyframes pulse {
    from { opacity: 0.5; }
    to { opacity: 1; }
}

/* --- Screen Shake --- */
.shake-effect {
    animation: screen-shake 0.2s ease-in-out;
}

/* --- Portal --- */
.burstix-portal {
    margin-top: 20px;
    padding: 15px;
    text-align: center;
}

.burstix-portal p {
    font-size: 0.6rem;
    font-weight: 800;
    color: var(--text-secondary);
    margin-bottom: 10px;
    letter-spacing: 2px;
}

.portal-links {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.portal-link {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 8px 12px;
    color: white;
    font-family: var(--font-heading);
    font-size: 0.7rem;
    text-decoration: none;
    transition: var(--transition);
}

.portal-link:hover {
    background: rgba(0, 242, 255, 0.1);
    border-color: var(--accent-cyan);
    transform: translateY(-2px);
}

@keyframes screen-shake {
    0% { transform: translate(0, 0); }
    25% { transform: translate(5px, -5px); }
    50% { transform: translate(-5px, 5px); }
    75% { transform: translate(5px, 5px); }
    100% { transform: translate(0, 0); }
}

/* --- Fever Mode --- */
body.fever .mesh-gradient {
    background: 
        radial-gradient(circle at 20% 30%, rgba(255, 0, 85, 0.4) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(255, 215, 0, 0.4) 0%, transparent 40%);
}

body.fever .grid-bg {
    background-image: 
        linear-gradient(rgba(255, 215, 0, 0.2) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 215, 0, 0.2) 1px, transparent 1px);
    animation: grid-move 5s linear infinite;
}

body.fever .big-number {
    color: var(--accent-gold);
    text-shadow: 0 0 50px var(--accent-gold);
}

/* --- Result Screen --- */
.result-card {
    text-align: center;
}

#result-rank-text {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 30px;
    color: var(--accent-cyan);
}

.final-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.stat-group .value {
    font-size: 2.5rem;
    font-weight: 800;
    font-family: var(--font-heading);
}

.stat-group.highlight .value {
    color: var(--accent-gold);
    font-size: 3.5rem;
}

.ranking-status {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.action-buttons {
    display: flex;
    gap: 15px;
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    border-radius: 12px;
    padding: 16px;
    flex: 1;
    font-family: var(--font-heading);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

/* Countdown */
.count-display {
    font-size: 10rem;
    font-family: var(--font-heading);
    font-weight: 800;
    color: var(--accent-cyan);
}

/* Mobile Adjustments */
/* Footer End Guide */
.footer-end-guide {
    width: 100%;
    margin-top: 40px;
    padding-top: 20px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.7rem;
    position: relative;
}

.footer-end-guide .divider {
    height: 1px;
    width: 60px;
    background: var(--glass-border);
    margin: 0 auto 15px;
}

.footer-end-guide .app-version {
    display: block;
    margin-bottom: 5px;
    letter-spacing: 1px;
}

.footer-end-guide .ad-disclaimer {
    font-weight: 800;
    opacity: 0.5;
    font-size: 0.6rem;
    letter-spacing: 2px;
}

@media (max-width: 380px) {
    h1.glitch { font-size: 2.8rem; }
    .big-number { font-size: 6rem; }
}