:root {
    /* Light Mode Pastel Palette */
    --bg-color: #fcf4f4;
    --text-color: #5d5d5d;
    --primary-color: #ffb7b2;
    --accent-color: #a0e7e5;
    --accent-secondary: #c9c9ff;
    --success-color: #b5ead7;
    --error-color: #ff9aa2;
    --lane-bg: rgba(255, 245, 245, 0.8);
    --judge-line-color: #ffdac1;
    --shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    --card-bg: white;
    --card-border: white;
}

/* Dark Mode */
:root.dark-mode {
    --bg-color: #1a1a2e;
    --text-color: #eaeaea;
    --primary-color: #e94560;
    --accent-color: #0f4c75;
    --accent-secondary: #3a506b;
    --success-color: #4caf50;
    --error-color: #ff5252;
    --lane-bg: rgba(30, 30, 50, 0.9);
    --judge-line-color: #e94560;
    --shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    --card-bg: #16213e;
    --card-border: #0f3460;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    background-image:
        radial-gradient(var(--accent-color) 2px, transparent 2px),
        radial-gradient(var(--primary-color) 2px, transparent 2px);
    background-size: 40px 40px;
    background-position: 0 0, 20px 20px;
    color: var(--text-color);
    overflow: hidden;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background-color 0.3s ease, color 0.3s ease;
}

#app {
    width: 100%;
    height: 100%;
    max-width: 600px;
    margin: 0 auto;
    background: var(--card-bg);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
    border-radius: 20px;
    transition: background-color 0.3s ease;
}

@media (max-width: 600px) {
    #app {
        border-radius: 0;
        max-width: 100%;
    }
}

.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: var(--card-bg);
    transition: opacity 0.3s ease, background-color 0.3s ease;
    padding: 2rem;
}

.screen.active {
    display: flex;
}

h1 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-color);
    text-shadow: 2px 2px 0px var(--accent-color);
    font-weight: 700;
    letter-spacing: 1px;
    line-height: 1.2;
}

h2 {
    color: var(--text-color);
    margin-bottom: 1rem;
}

.btn-primary,
.btn-secondary {
    padding: 1rem 3rem;
    font-size: 1.2rem;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 700;
    margin: 0.5rem;
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: var(--shadow);
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 183, 178, 0.5);
}

.btn-secondary {
    background: var(--card-bg);
    border: 3px solid var(--accent-color);
    color: var(--accent-color);
}

.btn-secondary:hover {
    background: var(--accent-color);
    color: white;
}

.settings {
    width: 100%;
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    border: 2px solid var(--card-border);
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    font-size: 1.1rem;
    color: var(--text-color);
}

.setting-item:last-child {
    margin-bottom: 0;
}

input[type="range"] {
    width: 50%;
    accent-color: var(--primary-color);
}

select {
    padding: 0.5rem 1rem;
    border-radius: 15px;
    background: var(--lane-bg);
    color: var(--text-color);
    border: none;
    font-family: inherit;
    cursor: pointer;
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: 0.3s;
    border-radius: 28px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: 0.3s;
    border-radius: 50%;
}

input:checked+.toggle-slider {
    background-color: var(--primary-color);
}

input:checked+.toggle-slider:before {
    transform: translateX(22px);
}

.high-score {
    margin-top: 1rem;
    color: var(--text-color);
    opacity: 0.7;
}

/* Game Screen */
#game-screen {
    justify-content: flex-start;
    padding: 0;
    background: var(--bg-color);
}

.hud {
    display: flex;
    justify-content: space-between;
    width: 100%;
    padding: 1.5rem 2rem;
    font-size: 1.3rem;
    font-weight: 700;
    z-index: 10;
    background: var(--card-bg);
    box-shadow: var(--shadow);
    border-bottom-left-radius: 20px;
    border-bottom-right-radius: 20px;
    color: var(--primary-color);
}

.accuracy-info {
    color: var(--success-color);
}

.rhythm-display {
    flex: 1;
    width: 100%;
    display: flex;
    position: relative;
    background: var(--card-bg);
    margin: 1rem;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.02);
    border: 5px solid var(--card-border);
}

.lane {
    flex: 1;
    position: relative;
    background-image: linear-gradient(to bottom, rgba(128, 128, 128, 0.1) 1px, transparent 1px);
    background-size: 100% 50px;
}

.left-lane {
    background-color: rgba(160, 231, 229, 0.1);
}

.dark-mode .left-lane {
    background-color: rgba(15, 76, 117, 0.2);
}

.right-lane {
    background-color: rgba(255, 183, 178, 0.1);
}

.dark-mode .right-lane {
    background-color: rgba(233, 69, 96, 0.2);
}

.center-divider {
    width: 4px;
    background: var(--card-border);
    height: 100%;
    z-index: 5;
}

.judge-line {
    position: absolute;
    bottom: 20%;
    left: 0;
    width: 100%;
    height: 8px;
    background-color: var(--judge-line-color);
    border-radius: 4px;
    z-index: 5;
    opacity: 0.8;
}

.lane-label {
    position: absolute;
    top: 1rem;
    width: 100%;
    text-align: center;
    font-weight: bold;
    color: var(--text-color);
    opacity: 0.5;
    font-size: 1rem;
}

/* Lane Feedback */
.lane-feedback {
    position: absolute;
    bottom: 25%;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.8rem;
    font-weight: 900;
    pointer-events: none;
    z-index: 30;
    text-shadow: 2px 2px 0 var(--card-bg);
    white-space: nowrap;
}

.feedback-great {
    color: #f1c40f;
    animation: pop 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.feedback-good {
    color: var(--success-color);
    animation: pop 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.feedback-miss {
    color: var(--error-color);
    animation: shake 0.3s;
}

/* Notes */
.note {
    position: absolute;
    width: 70%;
    height: 25px;
    left: 15%;
    border-radius: 12px;
    box-shadow: 0 4px 0 rgba(0, 0, 0, 0.1);
}

.note.left {
    background-color: var(--accent-color);
    border: 3px solid var(--card-bg);
}

.note.right {
    background-color: var(--primary-color);
    border: 3px solid var(--card-bg);
}

/* Touch zones */
.touch-controls {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    z-index: 20;
}

.touch-zone {
    flex: 1;
    height: 100%;
    transition: background 0.1s;
}

.touch-zone:active,
.touch-zone.active {
    background: rgba(255, 255, 255, 0.2);
}

.dark-mode .touch-zone:active,
.dark-mode .touch-zone.active {
    background: rgba(255, 255, 255, 0.1);
}

@keyframes pop {
    0% {
        transform: translateX(-50%) scale(0.5) rotate(-10deg);
        opacity: 0;
    }

    50% {
        transform: translateX(-50%) scale(1.2) rotate(5deg);
        opacity: 1;
    }

    100% {
        transform: translateX(-50%) scale(1) rotate(0deg);
        opacity: 0;
    }
}

@keyframes shake {
    0% {
        transform: translateX(-50%) translateX(0);
    }

    20% {
        transform: translateX(-50%) translateX(-10px) rotate(-5deg);
    }

    40% {
        transform: translateX(-50%) translateX(10px) rotate(5deg);
    }

    60% {
        transform: translateX(-50%) translateX(-5px);
    }

    80% {
        transform: translateX(-50%) translateX(5px);
    }

    100% {
        transform: translateX(-50%) translateX(0);
    }
}

/* Result Screen Styling */
#result-screen {
    z-index: 100;
}

#result-title {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
    text-shadow: 2px 2px 0 var(--accent-color);
}

.result-stats {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    width: 80%;
    max-width: 400px;
    text-align: center;
    border: 2px solid var(--card-border);
}

.stat-item {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
    color: var(--text-color);
}

.stat-item.big {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.stat-breakdown {
    display: flex;
    justify-content: space-around;
    border-top: 2px dashed var(--accent-secondary);
    padding-top: 1rem;
}

.breakdown-item {
    font-size: 1rem;
    font-weight: bold;
}

.breakdown-item.great {
    color: #f1c40f;
}

.breakdown-item.good {
    color: var(--success-color);
}

.breakdown-item.miss {
    color: var(--text-color);
    opacity: 0.5;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.hint {
    margin-top: 1rem;
    color: var(--text-color);
    opacity: 0.7;
    text-align: center;
    line-height: 1.5;
}

.hint.congratulations {
    font-size: 1.2rem;
    font-weight: 700;
    color: #f1c40f;
    opacity: 1;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}