:root {
    --primary-color: #1a1a1a;
    --secondary-color: #2ecc71;
    --accent-color: #e74c3c;
    --text-color: #ecf0f1;
}

body {
    background: var(--primary-color);
    font-family: 'Arial', sans-serif;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: var(--text-color);
}

.game-container {
    background: #2c3e50;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 0 30px rgba(0,0,0,0.5);
    max-width: 800px;
    width: 90%;
}

.level-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    font-size: 1.2em;
}

.timer {
    color: var(--accent-color);
}

.puzzle-container {
    background: #34495e;
    padding: 20px;
    border-radius: 10px;
}

.hints {
    margin-bottom: 20px;
}

.hint {
    background: #3498db;
    color: white;
    padding: 12px;
    margin: 8px 0;
    border-radius: 6px;
    font-size: 16px;
}

.password-display {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 20px 0;
}

.digit {
    width: 50px;
    height: 50px;
    background: #2c3e50;
    border: 2px solid var(--secondary-color);
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-family: monospace;
}

.keypad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    max-width: 300px;
    margin: 0 auto;
}

button {
    padding: 15px;
    font-size: 18px;
    border: none;
    background: #2c3e50;
    color: var(--text-color);
    border-radius: 8px;
    cursor: pointer;
    transition: 0.3s;
}

button:hover {
    background: #3498db;
}

.clear {
    background: var(--accent-color);
}

.submit {
    background: var(--secondary-color);
    color: #000;
}

.attempts {
    margin-top: 20px;
}

.attempt-history {
    background: rgba(0,0,0,0.2);
    padding: 15px;
    border-radius: 8px;
    max-height: 200px;
    overflow-y: auto;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.attempt {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    background: rgba(255,255,255,0.1);
    margin: 5px 0;
    border-radius: 5px;
}

.attempt-code {
    font-size: 18px;
    font-family: monospace;
}

.attempt-result {
    letter-spacing: 5px;
    font-size: 20px;
}

.correct {
    color: var(--secondary-color);
}

.wrong {
    color: var(--accent-color);
}

.setup-screen {
    background: #34495e;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    margin-bottom: 20px;
}

.setup-input {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 20px;
}

.setup-input input {
    padding: 10px;
    font-size: 18px;
    border: none;
    border-radius: 5px;
    width: 150px;
    text-align: center;
    letter-spacing: 5px;
}

.hint-circle {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    margin: 5px;
    display: inline-block;
    cursor: help;
    transition: transform 0.3s;
    box-shadow: 0 0 10px rgba(0,0,0,0.3);
}

.hint-circle:hover {
    transform: scale(1.2);
}

.level-display {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(0,0,0,0.7);
    padding: 10px 20px;
    border-radius: 20px;
    color: white;
    font-size: 18px;
}

.hints {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 20px 0;
    padding: 15px;
    background: rgba(0,0,0,0.1);
    border-radius: 10px;
}

.attempt-result {
    letter-spacing: 8px;
}

.mode-select {
    text-align: center;
    padding: 30px;
    background: #34495e;
    border-radius: 10px;
    margin-bottom: 20px;
}

.mode-select h1 {
    color: var(--text-color);
    margin-bottom: 30px;
}

.mode-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.mode-buttons button {
    padding: 15px 30px;
    font-size: 18px;
    background: var(--secondary-color);
    color: var(--primary-color);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s;
}

.mode-buttons button:hover {
    transform: scale(1.05);
    background: #27ae60;
}

.login-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.login-box {
    background: #2c3e50;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
    width: 300px;
}

.login-box h2 {
    color: #fff;
    text-align: center;
    margin-bottom: 20px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.input-group label {
    color: #fff;
    font-size: 14px;
}

.input-group input {
    padding: 10px;
    border: none;
    border-radius: 5px;
    background: #34495e;
    color: #fff;
    font-size: 16px;
}

.input-group input::placeholder {
    color: #7f8c8d;
}

#loginBtn {
    padding: 12px;
    background: #27ae60;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s;
}

#loginBtn:hover {
    background: #2ecc71;
}