:root {
    --color-bg: #f5f5f0;
    --color-surface: #ffffff;
    --color-text: #2c2c2c;
    --color-text-muted: #666666;
    --color-primary: #4a6fa5;
    --color-primary-dark: #3a5a85;
    --color-secondary: #8c8c8c;
    --color-secondary-dark: #6e6e6e;
    --color-danger: #c44536;
    --color-danger-dark: #a63728;
    --color-success: #2a9d8f;
    --color-border: #e0e0e0;
    --radius: 0.75rem;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
}

.app {
    display: flex;
    flex-direction: column;
    min-height: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

.header {
    position: relative;
    text-align: center;
    padding: var(--spacing-md) 0;
}

.header__repo {
    position: absolute;
    top: var(--spacing-md);
    right: 0;
    display: inline-flex;
    color: var(--color-text-muted);
}

.header__repo:hover {
    color: var(--color-text);
}

.logo {
    margin: 0;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.025em;
}

.screen {
    display: none;
    flex-direction: column;
    flex: 1;
    gap: var(--spacing-md);
}

.screen--active {
    display: flex;
}

.card {
    background-color: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: var(--spacing-xl);
}

.card--centered {
    text-align: center;
    margin: auto 0;
}

.card h2 {
    margin-top: 0;
    font-size: 1.5rem;
}

.card p {
    color: var(--color-text-muted);
    line-height: 1.5;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.15s ease;
}

.button:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

.button--primary {
    background-color: var(--color-primary);
    color: #ffffff;
}

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

.button--secondary {
    background-color: var(--color-secondary);
    color: #ffffff;
}

.button--secondary:hover {
    background-color: var(--color-secondary-dark);
}

.button--danger {
    background-color: var(--color-danger);
    color: #ffffff;
}

.button--danger:hover {
    background-color: var(--color-danger-dark);
}

.button--armed {
    outline: 3px solid var(--color-danger);
    outline-offset: 2px;
}

.rules {
    font-size: 0.875rem;
}

.hud {
    display: flex;
    justify-content: space-around;
    background-color: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: var(--spacing-md);
}

.hud__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.hud__label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
}

.hud__value {
    font-size: 1.5rem;
    font-weight: 700;
}

.gauge {
    display: flex;
    gap: 0.375rem;
    align-items: center;
    min-height: 1.75rem;
}

.gauge__cell {
    width: 0.625rem;
    height: 0.625rem;
    border-radius: 50%;
    background-color: var(--color-border);
}

.gauge--lives .gauge__cell--filled {
    background-color: var(--color-danger);
}

.gauge--skips .gauge__cell--filled {
    background-color: var(--color-primary);
}

.map {
    flex: 1;
    min-height: 300px;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    background-color: #d4e3f7;
}

.clues {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.clue {
    display: flex;
    flex-direction: column;
    min-width: 0;
    background-color: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: var(--spacing-md);
    gap: var(--spacing-xs);
}

.clue__label {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.clue__year {
    font-size: 1.25rem;
    font-weight: 700;
}

.clue__place {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.answer-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.answer-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 1rem;
}

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

.answer-actions {
    display: flex;
    gap: var(--spacing-md);
}

.answer-actions .button {
    flex: 1;
}

.feedback {
    min-height: 1.5rem;
    text-align: center;
    font-weight: 600;
}

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

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

.summary {
    display: flex;
    justify-content: space-around;
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background-color: var(--color-bg);
    border-radius: var(--radius);
}

.summary__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.summary__label {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.summary__value {
    font-size: 1.75rem;
    font-weight: 700;
}

.learning {
    margin: var(--spacing-lg) 0;
}

.learning h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.learning__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.learning__item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background-color: var(--color-bg);
    border-radius: var(--radius);
}

.learning__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-sm);
}

.learning__name {
    font-weight: 600;
}

.learning__curiosity {
    margin: 0;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.learning__link {
    color: var(--color-primary);
    text-decoration: none;
    font-size: 0.875rem;
}

.learning__link:hover {
    text-decoration: underline;
}

.map-label {
    background-color: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text);
    box-shadow: var(--shadow);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 480px) {
    .app {
        padding: var(--spacing-sm);
    }

    .clues {
        gap: var(--spacing-sm);
    }

    .clue {
        padding: var(--spacing-sm);
    }

    .answer-actions {
        gap: var(--spacing-sm);
    }

    .answer-actions .button {
        padding: var(--spacing-sm);
    }

    .learning__header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
}