:root {
    --bg-color: #1a1625;
    --primary-color: #8a2be2;
    --secondary-color: #2c2541;
    --tertiary-color: #4a4063;
    --text-color: #e0e0e0;
    --light-purple: #9d4edd;
    --highlight-color: #c77dff;
    --danger-color: #e5383b;
    --success-color: #00b894;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 420px;
    text-align: center;
}

.screen {
    display: none;
}

.screen.active {
    display: block;
}

/* --- Tela do Menu Principal --- */
#menu-screen .app-logo {
    width: 80px;
    height: 80px;
    background-color: #3a86ff;
    border-radius: 18px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 20px;
    box-shadow: 0 4px 15px rgba(58, 134, 255, 0.4);
}

#menu-screen .app-logo i {
    font-size: 3rem;
    color: white;
}

#menu-screen h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

#menu-screen p {
    color: var(--text-color);
    opacity: 0.8;
    margin-bottom: 40px;
}

.menu-options button {
    background-color: var(--secondary-color);
    color: var(--text-color);
    border: none;
    border-radius: 15px;
    padding: 15px 20px;
    width: 100%;
    text-align: left;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

.menu-options button:hover {
    background-color: var(--tertiary-color);
    transform: scale(1.02);
}

.menu-options .icon-container {
    width: 45px;
    height: 45px;
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-right: 20px;
    font-size: 1.5rem;
}
.icon-container.easy { background-color: #2ecc71; }
.icon-container.medium { background-color: #9b59b6; }
.icon-container.hard { background-color: #e67e22; }
.icon-container.survival { background-color: #e74c3c; }

.menu-options .mode-text {
    flex-grow: 1;
}
.menu-options .mode-text strong {
    display: block;
    font-size: 1.2rem;
}
.menu-options .mode-text span {
    font-size: 0.9rem;
    opacity: 0.7;
}
.menu-options .arrow {
    font-size: 1.2rem;
    color: var(--light-purple);
}

#menu-screen .footer-text {
    margin-top: 30px;
    opacity: 0.6;
    font-size: 0.9rem;
}

/* --- Tela de Jogo --- */
#game-screen .game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}
#game-screen .header-left {
    text-align: left;
}
#game-screen .header-left h2 {
    font-size: 1.8rem;
}
#game-screen .header-left span {
    font-size: 1rem;
    color: var(--light-purple);
}
#game-screen .header-right {
    text-align: right;
}
#game-screen .header-right span {
     font-size: 1rem;
}
#game-screen #exit-game {
    background: none;
    border: none;
    color: var(--text-color);
    opacity: 0.7;
    cursor: pointer;
    font-size: 1rem;
}
#game-screen #exit-game:hover {
    opacity: 1;
}

#game-screen .survival-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px 10px;
}
.timer-bar-container {
    height: 8px;
    background-color: var(--tertiary-color);
    border-radius: 4px;
    margin: 0 20px 20px;
}
.timer-bar {
    height: 100%;
    width: 100%;
    background-color: var(--highlight-color);
    border-radius: 4px;
    transition: width 0.1s linear;
}
.hearts-container i {
    color: var(--danger-color);
    margin-left: 5px;
    font-size: 1.5rem;
}

.question-container {
    background-color: var(--secondary-color);
    border-radius: 20px;
    padding: 40px 20px;
    margin: 20px;
}
.question-container span {
    font-size: 1rem;
    opacity: 0.7;
}
.question-container h3 {
    font-size: 2.8rem;
    margin-top: 10px;
}

.answers-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    padding: 0 20px;
}
.answers-grid button {
    background-color: var(--secondary-color);
    color: var(--text-color);
    border: 2px solid var(--secondary-color);
    border-radius: 15px;
    padding: 20px;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.2s;
}
.answers-grid button:hover {
    background-color: var(--tertiary-color);
}
.answers-grid button.correct {
    background-color: var(--success-color);
    border-color: var(--success-color);
}
.answers-grid button.wrong {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
}


/* --- Tela de Fim de Jogo --- */
#end-screen .trophy-icon {
    font-size: 4rem;
    color: var(--light-purple);
    background-color: var(--tertiary-color);
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 20px auto;
}
#end-screen h1 {
    font-size: 2.8rem;
}
#end-screen .mode-title {
    opacity: 0.8;
    margin-bottom: 30px;
}

#end-screen .results-box {
    background-color: var(--secondary-color);
    padding: 20px;
    border-radius: 15px;
}
.results-box .message {
    background-color: var(--tertiary-color);
    color: var(--highlight-color);
    padding: 10px;
    border-radius: 10px;
    margin-bottom: 25px;
    font-weight: 500;
}
.results-box .stats {
    display: flex;
    justify-content: space-around;
    margin-bottom: 25px;
}
.stats div {
    flex-basis: 50%;
}
.stats .stat-value {
    font-size: 2.5rem;
    font-weight: 700;
}
.stats .stat-label {
    opacity: 0.7;
}
.results-box .details {
    border-top: 1px solid var(--tertiary-color);
    padding-top: 15px;
    text-align: left;
}
.details p {
    display: flex;
    justify-content: space-between;
    margin-bottom: 5px;
    font-size: 1.1rem;
}
.details p span:first-child {
    opacity: 0.8;
}

#end-screen .action-buttons {
    margin-top: 30px;
}
.action-buttons button {
    width: 100%;
    padding: 18px;
    border-radius: 15px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}
#play-again {
    background-color: var(--primary-color);
    color: white;
    border: none;
    margin-bottom: 15px;
}
#play-again:hover {
    background-color: var(--light-purple);
}
#back-to-menu {
    background-color: var(--secondary-color);
    color: var(--text-color);
    border: none;
}
#back-to-menu:hover {
    background-color: var(--tertiary-color);
}

#end-screen .footer-text {
     margin-top: 30px;
    opacity: 0.6;
    font-size: 0.9rem;
}