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

:root {
    --bg-primary: #0d1b2a;
    --bg-secondary: #1b2838;
    --color-default: #2a4a6b;
    --color-correct: #27ae60;
    --color-wrong: #c0392b;
    --color-active: #f39c12;
    --color-text: #ecf0f1;
    --rosco-size: 500px;
    --letter-size: 38px;
    --font-display: 'Russo One', sans-serif;
    --font-body: 'Inter', sans-serif;
}

body {
    background: var(--bg-primary);
    color: var(--color-text);
    font-family: var(--font-body);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    overflow-x: hidden;
    width: 100%;
}

#app {
    width: 100%;
    max-width: 620px;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px 16px;
    gap: 16px;
}

/* Header */
header h1 {
    font-family: var(--font-display);
    font-size: 2.2rem;
    letter-spacing: 4px;
    color: var(--color-active);
    text-shadow: 0 0 20px rgba(243, 156, 18, 0.3);
}

/* Game Info */
#game-info {
    display: flex;
    align-items: center;
    gap: 24px;
}

#timer {
    font-family: var(--font-display);
    font-size: 1.8rem;
}

#scoreboard {
    display: flex;
    gap: 16px;
}

.score {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 1.2rem;
    font-weight: 700;
}

.dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    display: inline-block;
}

.dot.green { background: var(--color-correct); }
.dot.red { background: var(--color-wrong); }

#game-date {
    font-size: 1rem;
    color: var(--color-text-dim, #7f8c8d);
    font-weight: 600;
}

/* Rosco */
#rosco-container {
    width: var(--rosco-size);
    max-width: calc(100vw - 32px);
    aspect-ratio: 1;
}

#rosco {
    position: relative;
    width: 100%;
    height: 100%;
}

.letter-circle {
    position: absolute;
    width: var(--letter-size);
    height: var(--letter-size);
    border-radius: 50%;
    background: var(--color-default);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 0.9rem;
    transform: translate(-50%, -50%);
    transition: background 0.3s, box-shadow 0.3s;
    border: 2px solid rgba(255, 255, 255, 0.1);
    user-select: none;
}

.letter-circle.letter-intro {
    transition: left 0.6s cubic-bezier(0.34, 1.56, 0.64, 1),
                top 0.6s cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity 0.4s ease-out,
                transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1),
                background 0.3s,
                box-shadow 0.3s;
}

.letter-circle.correct {
    background: var(--color-correct);
    border-color: rgba(39, 174, 96, 0.5);
}

.letter-circle.wrong {
    background: var(--color-wrong);
    border-color: rgba(192, 57, 43, 0.5);
}

.letter-circle.active {
    background: var(--color-active);
    border-color: rgba(243, 156, 18, 0.8);
    animation: pulse 1s ease-in-out infinite;
    z-index: 10;
    transform: translate(-50%, -50%) scale(1.2);
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(243, 156, 18, 0.6); }
    50% { box-shadow: 0 0 16px 6px rgba(243, 156, 18, 0.25); }
}

.letter-circle.flash-correct {
    animation: flash-green 0.4s ease-out forwards;
}

.letter-circle.flash-wrong {
    animation: flash-red 0.4s ease-out forwards;
}

@keyframes flash-green {
    0% { background: var(--color-correct); transform: translate(-50%, -50%) scale(1.3); }
    100% { background: var(--color-correct); transform: translate(-50%, -50%) scale(1); }
}

@keyframes flash-red {
    0% { background: var(--color-wrong); transform: translate(-50%, -50%) scale(1.3); }
    100% { background: var(--color-wrong); transform: translate(-50%, -50%) scale(1); }
}

/* Interaction Area */
#interaction-area {
    width: 100%;
    text-align: center;
}

#definition {
    font-size: 1.05rem;
    line-height: 1.5;
    min-height: 56px;
    padding: 14px 18px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

#input-area {
    margin-top: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

#answer-input {
    width: 100%;
    padding: 14px 18px;
    border-radius: 10px;
    border: 2px solid var(--color-default);
    background: var(--bg-secondary);
    color: var(--color-text);
    font-size: 1.1rem;
    font-family: var(--font-body);
    outline: none;
    transition: border-color 0.2s;
}

#answer-input:focus {
    border-color: var(--color-active);
}

#buttons {
    display: flex;
    gap: 10px;
}

#buttons button {
    flex: 1;
    padding: 13px;
    border: none;
    border-radius: 10px;
    font-family: var(--font-display);
    font-size: 0.9rem;
    cursor: pointer;
    transition: transform 0.1s, opacity 0.2s;
}

#buttons button:active {
    transform: scale(0.97);
}

#submit-btn {
    background: var(--color-correct);
    color: white;
}

#pass-btn {
    background: var(--color-default);
    color: white;
}

/* Start Button */
#start-btn {
    padding: 16px 48px;
    border: none;
    border-radius: 12px;
    background: var(--color-active);
    color: white;
    font-family: var(--font-display);
    font-size: 1.3rem;
    letter-spacing: 2px;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
    box-shadow: 0 4px 15px rgba(243, 156, 18, 0.3);
}

#start-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(243, 156, 18, 0.5);
}

/* Wrong Answer Overlay */
#wrong-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 90;
    padding: 20px;
}

#wrong-modal {
    background: var(--bg-secondary);
    border: 2px solid var(--color-wrong);
    border-radius: 16px;
    padding: 28px 36px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 380px;
    width: 100%;
}

#wrong-label {
    font-size: 1rem;
    color: var(--color-text-dim, #7f8c8d);
}

#wrong-answer {
    font-family: var(--font-display);
    font-size: 1.6rem;
    color: var(--color-wrong);
}

#wrong-definition {
    font-size: 0.9rem;
    color: var(--color-text);
    line-height: 1.4;
    font-style: italic;
}

#wrong-accept-btn {
    margin-top: 4px;
    padding: 12px;
    border: none;
    border-radius: 10px;
    background: var(--color-wrong);
    color: white;
    font-family: var(--font-display);
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.1s;
}

#wrong-accept-btn:active {
    transform: scale(0.97);
}

/* Results Overlay */
#results-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 20px;
}

#results-modal {
    background: var(--bg-secondary);
    border-radius: 20px;
    padding: 28px;
    max-width: 480px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

#results-modal h2 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    color: var(--color-active);
}

#results-time {
    font-family: var(--font-display);
    font-size: 1.4rem;
}

#results-stats {
    display: flex;
    justify-content: center;
    gap: 32px;
    font-size: 1.3rem;
    font-weight: 700;
}

#results-letters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 5px;
    padding: 8px 0;
}

.result-letter {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 0.7rem;
    color: white;
}

.result-letter.correct { background: var(--color-correct); }
.result-letter.wrong { background: var(--color-wrong); }

#results-details {
    text-align: left;
    max-height: 220px;
    overflow-y: auto;
    padding: 10px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    font-size: 0.88rem;
}

.detail-row {
    padding: 5px 6px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    gap: 8px;
    align-items: baseline;
}

.detail-row .letter-label {
    font-weight: 700;
    min-width: 22px;
}

.detail-row.correct .letter-label { color: var(--color-correct); }
.detail-row.wrong .letter-label { color: var(--color-wrong); }
.detail-row .correct-answer { color: var(--color-correct); font-weight: 600; }
.detail-row .user-answer { color: var(--color-wrong); text-decoration: line-through; }

#results-buttons {
    display: flex;
    gap: 10px;
}

#results-buttons button {
    flex: 1;
    padding: 14px;
    border: none;
    border-radius: 10px;
    font-family: var(--font-display);
    font-size: 0.95rem;
    cursor: pointer;
    transition: transform 0.1s;
}

#results-buttons button:active { transform: scale(0.97); }

#share-btn {
    background: #25D366;
    color: white;
}

#replay-btn {
    background: var(--color-default);
    color: white;
}

/* Footer */
#footer {
    margin-top: auto;
    padding: 16px 0 8px;
    text-align: center;
    font-size: 0.75rem;
}

#footer a {
    color: var(--color-text-dim, #7f8c8d);
    text-decoration: none;
}

#footer a:hover {
    text-decoration: underline;
}

.hidden { display: none !important; }

/* Responsive */
@media (max-width: 540px) {
    :root {
        --rosco-size: min(92vw, 420px);
        --letter-size: 32px;
    }

    header h1 { font-size: 1.6rem; }
    .letter-circle { font-size: 0.78rem; }
    #timer { font-size: 1.4rem; }
    #definition { font-size: 0.95rem; }
}

@media (max-width: 380px) {
    :root {
        --rosco-size: 290px;
        --letter-size: 26px;
    }

    .letter-circle { font-size: 0.68rem; }
}