:root {
    --bg-color: #15151e;
    --surface-color: #1f1f2e;
    --primary-color: #e10600; /* F1 Red */
    --primary-hover: #ff0b04;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --success-color: #00d2be; /* Mercedes cyanish for success */
    --error-color: #e10600;
    
    --font-heading: 'Racing Sans One', sans-serif;
    --font-body: 'Inter', sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    overflow-x: hidden;
}

#app {
    width: 100%;
    max-width: 680px;
    display: flex;
    flex-direction: column;
    padding: 1rem;
}

.screen {
    display: none;
    flex-direction: column;
    flex: 1;
    animation: fadeIn 0.3s ease-out;
}

.screen.active {
    display: flex;
}

/* Home Screen */
.hero {
    text-align: center;
    margin-top: 1rem;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--primary-color);
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.hero p {
    font-size: 1rem;
    color: var(--text-secondary);
}

.modes-container {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.mode-btn {
    background-color: var(--surface-color);
    border: 2px solid transparent;
    border-radius: 12px;
    padding: 1rem 1.25rem;
    width: 100%;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s ease;
    color: var(--text-primary);
}

.mode-btn h2 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
    letter-spacing: 1px;
}

.mode-btn p {
    font-family: var(--font-body);
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

.mode-btn:hover {
    border-color: var(--primary-color);
    box-shadow: none;
}

/* Game Screen */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.score-display {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--primary-color);
}

.game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    position: relative;
}

.circuit-display {
    background-color: var(--surface-color);
    border-radius: 14px;
    padding: 1rem;
    width: 100%;
    max-width: 520px;
    aspect-ratio: 16/10;
    max-height: 46vh;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 0.75rem;
    transition: max-width 0.3s ease, max-height 0.3s ease;
}

/* After a lost round the layout shrinks so the result and the share row fit on screen. */
.round-over .circuit-display {
    max-width: 340px;
    max-height: 30vh;
    padding: 0.75rem;
    margin-bottom: 0.5rem;
}

#circuit-svg-container {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

#circuit-svg-container svg {
    max-width: 100%;
    max-height: 100%;
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.1));
}

#circuit-svg-container path {
    transition: stroke-dasharray 0.3s, stroke-dashoffset 0.3s;
}

.controls {
    width: 100%;
    max-width: 520px;
}

.controls.hidden {
    display: none;
}

/* Easy Mode Options */
.options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.option-btn {
    background-color: var(--surface-color);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    padding: 0.7rem 0.9rem;
    min-height: 0;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.option-btn:hover:not(:disabled) {
    background-color: rgba(255, 255, 255, 0.1);
}

.option-btn:disabled {
    cursor: not-allowed;
    opacity: 0.7;
}

.option-btn.correct {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: #000;
}

.option-btn.wrong {
    background-color: var(--error-color);
    border-color: var(--error-color);
}

/* Hard Mode Form */
#hard-form {
    display: flex;
    gap: 0.5rem;
}

#circuit-input {
    flex: 1;
    padding: 0.6rem 1rem;
    font-size: 1rem;
    background-color: var(--surface-color);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-body);
}

#circuit-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.hints {
    margin-top: 0.5rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

/* Common Buttons */
.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.6rem 1.25rem;
    min-height: 0;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-heading);
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s ease;
    letter-spacing: 1px;
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--text-secondary);
    padding: 0.35rem 0.8rem;
    min-height: 0;
    font-size: 0.9rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    background-color: rgba(255,255,255,0.1);
    color: var(--text-primary);
}

/* Feedback Overlay */
.feedback {
    text-align: center;
    animation: slideUp 0.3s ease-out;
    background-color: var(--surface-color);
    padding: 0.9rem 1rem;
    border-radius: 12px;
    width: 100%;
    max-width: 520px;
}

.feedback.hidden {
    display: none;
}

.feedback h2 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    margin-bottom: 0.25rem;
}

.feedback.success h2 {
    color: var(--success-color);
}

.feedback.error h2 {
    color: var(--error-color);
}

.feedback p {
    color: var(--text-secondary);
    margin: 0 0 0.75rem;
    font-size: 0.95rem;
    line-height: 1.45;
}

.feedback .final-streak {
    display: block;
    margin-top: 0.4rem;
    color: var(--text-primary);
}

#share-container.hidden {
    display: none;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 600px) {
    .options-grid {
        grid-template-columns: 1fr;
    }
    .hero h1 {
        font-size: 1.6rem;
    }
    .modes-container {
        flex-direction: column;
        align-items: center;
    }
    #app {
        padding: 0.5rem 0;
    }
    .circuit-display {
        max-height: 38vh;
    }
    .round-over .circuit-display {
        max-width: 260px;
        max-height: 24vh;
    }
}

/* Beat the shared theme's larger defaults for this game. */
body[data-game="f1-circuit-guesser"] .modes-container {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}
body[data-game="f1-circuit-guesser"] .mode-btn {
    padding: 0.9rem 1rem;
}
body[data-game="f1-circuit-guesser"] .mode-btn h2 {
    font-size: 1.15rem;
}
body[data-game="f1-circuit-guesser"] .feedback h2 {
    font-size: 1.3rem;
}
body[data-game="f1-circuit-guesser"] .feedback .game-share {
    margin-top: 0.75rem;
}
@media (max-width: 600px) {
    body[data-game="f1-circuit-guesser"] .modes-container {
        grid-template-columns: 1fr;
    }
    body[data-game="f1-circuit-guesser"] .mode-btn {
        padding: 0.75rem 1rem;
    }
    body[data-game="f1-circuit-guesser"] .mode-btn h2 {
        font-size: 1.05rem;
    }
}
body[data-game="f1-circuit-guesser"] #game-screen > header {
    width: 100%;
    max-width: 520px;
    align-self: center;
}