:root {
    --bg-color: #ffffff;
    --text-color: #000000;
    --primary: #1d4ed8;      /* Primary Blue */
    --primary-hover: #1e3a8a;
    --secondary: #dbeafe;    /* Light Blue */
    --secondary-hover: #bfdbfe;
    --accent: #fecaca;       /* Light Red */
    --accent-dark: #ef4444;  /* Darker Red for text on accent */
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 10vh;
    min-height: 100vh;
    overflow: hidden;
}

.container {
    width: 100%;
    max-width: 600px;
    padding: 2rem;
    text-align: center;
}

.screen {
    display: none;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.screen.active {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transform: translateY(0);
    animation: fadeIn 0.5s forwards;
}

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

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--primary);
}

h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #4b5563;
}

.btn {
    border: none;
    border-radius: 9999px;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.btn:active {
    transform: scale(0.95);
}

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

.btn.primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 10px 15px -3px rgba(29, 78, 216, 0.4);
}

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

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

/* Playing Area Elements */
#metronome-area {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.countdown-area {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 200px;
    margin: 2rem 0;
}

#countdown-text {
    font-size: 4rem;
    font-weight: 800;
    color: var(--primary);
    animation: popIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes popIn {
    0% { transform: scale(0.5); opacity: 0; }
    80% { transform: scale(1.1); opacity: 1; }
    100% { transform: scale(1); opacity: 1; }
}

/* Pulsating Circle for Metronome */
.pulsating-circle {
    width: 150px;
    height: 150px;
    background-color: var(--primary);
    border-radius: 50%;
    margin: 2rem 0;
    position: relative;
    box-shadow: 0 0 0 0 rgba(29, 78, 216, 0.7);
}

.pulsating-circle.pulse {
    animation: pulse-animation 0.1s cubic-bezier(0.4, 0, 0.6, 1);
}

@keyframes pulse-animation {
    0% {
        transform: scale(0.9);
        box-shadow: 0 0 0 0 rgba(29, 78, 216, 0.7);
    }
    50% {
        transform: scale(1.1);
        box-shadow: 0 0 0 20px rgba(29, 78, 216, 0);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(29, 78, 216, 0);
    }
}

.instruction {
    font-weight: 600;
    color: var(--primary);
}

/* Slider Area */
.slider-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    width: 100%;
    max-width: 400px;
    margin: 1rem auto;
}

.slider-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 12px;
    background: var(--secondary);
    border-radius: 6px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
    transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:active {
    transform: scale(1.2);
}

input[type="range"]::-moz-range-thumb {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
    border: none;
}

.hidden {
    display: none !important;
}

/* Result Stats */
.stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

.stat-box {
    background-color: var(--secondary);
    padding: 1.5rem;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    min-width: 140px;
}

.stat-box .label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.stat-box .value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-color);
}

.score-display {
    background-color: var(--accent);
    padding: 1.5rem 3rem;
    border-radius: 20px;
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
}

.score-display .label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-dark);
    margin-bottom: 0.5rem;
}

.score-display .value {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--accent-dark);
}

.final-score {
    font-size: 5rem;
    font-weight: 800;
    color: var(--primary);
    margin: 2rem 0;
}

/* Modes and Leaderboard UI */
.mode-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 2rem 0;
}

.status-msg {
    color: var(--accent-dark);
    font-size: 0.95rem;
    font-weight: 600;
    background: var(--accent);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    display: inline-block;
}

.leaderboard-container {
    width: 100%;
    background: var(--secondary);
    border-radius: 12px;
    padding: 1.5rem;
    max-height: 400px;
    overflow-y: auto;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
}

#leaderboard-table {
    width: 100%;
    border-collapse: collapse;
}

#leaderboard-table th {
    text-align: left;
    padding: 0.75rem;
    color: var(--primary);
    border-bottom: 2px solid var(--primary);
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

#leaderboard-table td {
    padding: 1rem 0.75rem;
    border-bottom: 1px solid rgba(29, 78, 216, 0.2);
    font-weight: 600;
    font-size: 1.2rem;
}

#leaderboard-table tr:last-child td {
    border-bottom: none;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
}

input[type="text"] {
    width: 100%;
    padding: 1rem;
    font-size: 1.2rem;
    text-align: center;
    border: 2px solid var(--secondary);
    border-radius: 12px;
    outline: none;
    transition: border-color 0.2s ease;
    font-family: inherit;
    font-weight: 600;
    margin-bottom: 1rem;
}

input[type="text"]:focus {
    border-color: var(--primary);
}

/* Logo Styles */
#game-logo {
    position: fixed;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
}

#game-logo.logo-start {
    top: 10vh;
    left: 50%;
    transform: translateX(-50%);
    width: 140px;
    height: auto;
    cursor: default;
}

#game-logo.logo-ingame {
    top: 20px;
    left: 20px;
    transform: translateX(0);
    width: 60px;
    height: auto;
    cursor: pointer;
}

#game-logo.logo-ingame:hover {
    transform: scale(1.1);
}



.main-instruction {
    font-size: 1.25rem;
    font-weight: 600;
    color: #374151;
}

.daily-info {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
    margin-top: -0.5rem;
}