:root {
    --bg-color: #121213;
    --text-color: #ffffff;
    --border-color: #3a3a3c;
    --input-bg: #2c2c2e;
    --btn-primary: #538d4e;
    --btn-secondary: #818384;
    --accent-color: #d7dadc;
}

/* Screen reader only class for accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Skip to main content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--btn-primary);
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    min-height: 100dvh;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 500px;
    padding: 10px 20px;
    box-sizing: border-box;
    border-bottom: 1px solid var(--border-color);
}

h1 { margin: 0; font-size: 1.8rem; letter-spacing: 2px; }

.selectors {
    display: flex;
    gap: 8px;
}

select#lang-selector,
select#unit-selector {
    background: var(--input-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 5px 8px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
}

#game-container {
    flex: 1;
    width: 100%;
    max-width: 500px;
    padding: 20px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
}

#daily-category {
    color: #888;
    font-size: 0.9rem;
    text-transform: uppercase;
    margin-bottom: 5px;
    letter-spacing: 1px;
}

#target-item {
    font-size: 1.8rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 8px;
    line-height: 1.2;
}

#instruction-text {
    color: #999;
    font-size: 0.95rem;
    text-align: center;
    margin-bottom: 20px;
    font-style: italic;
}

#guess-list {
    flex: 1;
    width: 100%;
    overflow-y: auto;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.guess-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1.1rem;
    background-color: #1a1a1b;
    animation: fadeIn 0.3s ease;
}

.guess-icon { 
    font-size: 1.2rem;
    aria-hidden: true;
}

/* Focus indicators for accessibility */
input:focus,
button:focus,
select:focus {
    outline: 3px solid var(--btn-primary);
    outline-offset: 2px;
}

.controls {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

input[type="number"] {
    flex: 2 1 200px;
    min-width: 200px;
    padding: 15px;
    border-radius: 4px;
    border: 2px solid var(--border-color);
    background: var(--input-bg);
    color: var(--text-color);
    font-size: 1.2rem;
    text-align: center;
    outline: none;
    -moz-appearance: textfield;
}
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

button {
    flex: 1 1 120px;
    min-width: 120px;
    padding: 15px;
    border-radius: 4px;
    border: none;
    background-color: var(--btn-primary);
    color: white;
    font-weight: bold;
    font-size: 1rem;
    cursor: pointer;
    transition: opacity 0.2s;
}

@media (max-width: 400px) {
    input[type="number"],
    button {
        flex: 1 1 100%;
        width: 100%;
    }
}

button:active { opacity: 0.8; }
button:disabled { background-color: var(--border-color); cursor: not-allowed; }

#result-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #1a1a1b;
    padding: 30px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 25px rgba(0,0,0,0.8);
    text-align: center;
    display: none;
    width: 85%;
    max-width: 320px;
    z-index: 1000;
}

.overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.6);
    display: none;
    z-index: 999;
}

.hidden { display: none !important; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}