/* ===== CSS Variables ===== */
:root {
    --color-bg: #1a1a2e;
    --color-surface: #16213e;
    --color-primary: #e94560;
    --color-secondary: #0f3460;
    --color-text: #ffffff;
    --color-text-dim: #a0a0c0;

    /* Player colors */
    --color-player1: #FF6B6B;
    --color-player2: #4ECDC4;
    --color-player3: #FFE66D;
    --color-player4: #95E1D3;

    --color-correct: #2ECC71;
    --color-incorrect: #E74C3C;

    --transition-speed: 0.2s;
}

/* ===== Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    width: 100%;
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.4;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    touch-action: manipulation;
}

/* ===== Screen Management ===== */
.screen {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    height: 100dvh;
}

.screen.active {
    display: flex;
    flex-direction: column;
}

/* ===== Setup Screen ===== */
#screen-setup {
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.setup-container {
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.title {
    font-size: 2.5rem;
    margin-bottom: 8px;
}

.subtitle {
    color: var(--color-text-dim);
    margin-bottom: 32px;
}

.label {
    color: var(--color-text-dim);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.player-count-section {
    margin-bottom: 24px;
}

.player-count-buttons {
    display: flex;
    justify-content: center;
    gap: 12px;
}

.btn-count {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 3px solid var(--color-secondary);
    background: transparent;
    color: var(--color-text);
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.btn-count.selected {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: scale(1.1);
}

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

.player-names {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.player-name-input {
    display: flex;
    align-items: center;
    gap: 12px;
}

.player-color {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    flex-shrink: 0;
}

.player-name-input input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid var(--color-secondary);
    border-radius: 8px;
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 1rem;
}

.player-name-input input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.btn-primary {
    width: 100%;
    padding: 16px 32px;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary:not(:disabled):active {
    transform: scale(0.98);
}

.btn-secondary {
    width: 100%;
    padding: 14px 24px;
    background: var(--color-secondary);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.btn-secondary:active {
    transform: scale(0.98);
}

.hint {
    margin-top: 24px;
    color: var(--color-text-dim);
    font-size: 0.85rem;
}

/* ===== Playing Screen ===== */
#screen-playing {
    display: none;
    flex-direction: column;
}

#screen-playing.active {
    display: flex;
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--color-surface);
}

.question-counter {
    font-size: 0.9rem;
    color: var(--color-text-dim);
}

.timer {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--color-primary);
    min-width: 40px;
    text-align: center;
}

.timer.warning {
    color: #FFA500;
    animation: pulse 0.5s infinite;
}

.timer.critical {
    color: var(--color-incorrect);
    animation: pulse 0.3s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.question-section {
    padding: 16px;
    text-align: center;
    background: var(--color-surface);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-secondary);
    border-radius: 12px;
    font-size: 0.8rem;
    margin-bottom: 8px;
}

.question {
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.4;
}

.options-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 12px;
    background: var(--color-bg);
}

.option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px;
    background: var(--color-surface);
    border: 2px solid var(--color-secondary);
    border-radius: 8px;
    color: var(--color-text);
    font-size: 0.9rem;
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.option:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.option.selected {
    border-color: var(--color-primary);
    background: rgba(233, 69, 96, 0.2);
}

.option.correct {
    border-color: var(--color-correct);
    background: rgba(46, 204, 113, 0.3);
}

.option.incorrect {
    border-color: var(--color-incorrect);
    background: rgba(231, 76, 60, 0.3);
}

.option-letter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--color-secondary);
    border-radius: 4px;
    font-weight: bold;
    font-size: 0.8rem;
    flex-shrink: 0;
}

.option-text {
    flex: 1;
}

/* ===== Players Section (Buzzers) ===== */
.players-section {
    flex: 1;
    display: grid;
    gap: 4px;
    padding: 4px;
    min-height: 150px;
}

.players-section.players-2 {
    grid-template-columns: 1fr 1fr;
}

.players-section.players-3 {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
}

.players-section.players-3 .player-zone:last-child {
    grid-column: span 2;
}

.players-section.players-4 {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
}

.player-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 12px;
    border-radius: 12px;
    transition: all var(--transition-speed);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.player-zone.player-1 { background: rgba(255, 107, 107, 0.3); border: 3px solid var(--color-player1); }
.player-zone.player-2 { background: rgba(78, 205, 196, 0.3); border: 3px solid var(--color-player2); }
.player-zone.player-3 { background: rgba(255, 230, 109, 0.3); border: 3px solid var(--color-player3); }
.player-zone.player-4 { background: rgba(149, 225, 211, 0.3); border: 3px solid var(--color-player4); }

.player-zone.buzzed {
    animation: buzzed-pulse 0.5s ease-out;
}

.player-zone.active {
    transform: scale(1.02);
}

.player-zone.active.player-1 { background: rgba(255, 107, 107, 0.6); box-shadow: 0 0 20px var(--color-player1); }
.player-zone.active.player-2 { background: rgba(78, 205, 196, 0.6); box-shadow: 0 0 20px var(--color-player2); }
.player-zone.active.player-3 { background: rgba(255, 230, 109, 0.6); box-shadow: 0 0 20px var(--color-player3); }
.player-zone.active.player-4 { background: rgba(149, 225, 211, 0.6); box-shadow: 0 0 20px var(--color-player4); }

.player-zone.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.player-zone.failed {
    opacity: 0.3;
}

@keyframes buzzed-pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.player-name {
    font-size: 1rem;
    font-weight: bold;
    margin-bottom: 4px;
}

.player-score {
    font-size: 0.85rem;
    opacity: 0.8;
}

.buzzer-text {
    font-size: 1.2rem;
    font-weight: bold;
    margin-top: 8px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.player-zone.active .buzzer-text {
    display: none;
}

.player-status {
    display: none;
    font-size: 0.9rem;
    margin-top: 8px;
}

.player-zone.active .player-status {
    display: block;
}

/* ===== Rebote Banner ===== */
.rebote-banner {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(255, 165, 0, 0.95);
    color: #000;
    padding: 16px 24px;
    border-radius: 12px;
    font-weight: bold;
    font-size: 1.1rem;
    z-index: 100;
    animation: rebote-appear 0.3s ease-out;
}

.rebote-banner.show {
    display: block;
}

@keyframes rebote-appear {
    0% { transform: translate(-50%, -50%) scale(0.5); opacity: 0; }
    100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
}

/* ===== Reveal Screen ===== */
#screen-reveal {
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.reveal-container {
    text-align: center;
    max-width: 400px;
}

.reveal-result {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 24px;
}

.reveal-result.correct {
    color: var(--color-correct);
}

.reveal-result.incorrect {
    color: var(--color-incorrect);
}

.reveal-result.timeout {
    color: var(--color-text-dim);
}

.reveal-answer {
    background: var(--color-surface);
    padding: 16px 24px;
    border-radius: 12px;
    margin-bottom: 24px;
}

.reveal-answer .label {
    margin-bottom: 8px;
}

#correct-answer {
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--color-correct);
}

.reveal-points {
    margin-bottom: 24px;
}

.points-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--color-surface);
    border-radius: 8px;
    margin-bottom: 8px;
}

.points-player {
    display: flex;
    align-items: center;
    gap: 8px;
}

.points-color {
    width: 16px;
    height: 16px;
    border-radius: 50%;
}

.points-value {
    font-weight: bold;
}

.points-value.positive {
    color: var(--color-correct);
}

.points-value.zero {
    color: var(--color-text-dim);
}

.next-hint {
    color: var(--color-text-dim);
    font-size: 0.9rem;
}

/* ===== Finished Screen ===== */
#screen-finished {
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.finished-container {
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.finished-title {
    font-size: 2rem;
    margin-bottom: 24px;
}

.leaderboard {
    margin-bottom: 32px;
}

.leaderboard-item {
    display: flex;
    align-items: center;
    padding: 16px;
    background: var(--color-surface);
    border-radius: 12px;
    margin-bottom: 8px;
}

.leaderboard-item:first-child {
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    color: #000;
}

.leaderboard-position {
    font-size: 1.5rem;
    margin-right: 12px;
    min-width: 40px;
}

.leaderboard-player {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
}

.leaderboard-color {
    width: 20px;
    height: 20px;
    border-radius: 50%;
}

.leaderboard-name {
    font-weight: 600;
}

.leaderboard-score {
    font-size: 1.2rem;
    font-weight: bold;
}

.finished-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ===== Error Screen ===== */
#screen-error {
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.error-container {
    text-align: center;
}

.error-icon {
    font-size: 4rem;
    margin-bottom: 16px;
}

.error-message {
    color: var(--color-text-dim);
    margin-bottom: 24px;
}

/* ===== Landscape optimizations ===== */
@media (orientation: landscape) and (max-height: 500px) {
    .game-header {
        padding: 8px 16px;
    }

    .question-section {
        padding: 8px 16px;
    }

    .question {
        font-size: 1rem;
    }

    .options-section {
        padding: 8px;
        gap: 6px;
    }

    .option {
        padding: 8px;
        font-size: 0.85rem;
    }

    .players-section {
        min-height: 100px;
    }

    .player-name {
        font-size: 0.9rem;
    }

    .buzzer-text {
        font-size: 1rem;
    }
}

/* ===== Tablet+ ===== */
@media (min-width: 768px) {
    .setup-container {
        max-width: 500px;
    }

    .title {
        font-size: 3rem;
    }

    .question {
        font-size: 1.3rem;
    }

    .option {
        font-size: 1rem;
        padding: 16px;
    }

    .player-zone {
        padding: 20px;
    }

    .player-name {
        font-size: 1.2rem;
    }

    .buzzer-text {
        font-size: 1.5rem;
    }
}