/* ---- Layout ---- */
.game-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.game-container {
    width: 100%;
    max-width: 520px;
    position: relative;
}

/* ---- Screens ---- */
.screen {
    display: none;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.2rem;
    animation: fadeIn 0.25s ease;
}

.screen.active {
    display: flex;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ---- Menu Screen ---- */
.menu-title {
    font-size: 3.2rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 3px;
    background: linear-gradient(135deg, #ff6b6b, #feca57, #ff9ff3);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
}

.menu-subtitle {
    color: var(--muted);
    font-size: 1.05rem;
    font-weight: 600;
}

.menu-bubble {
    font-size: 5rem;
    animation: floatBubble 3s ease-in-out infinite;
}

@keyframes floatBubble {
    0%, 100% { transform: translateY(0); }
    50%       { transform: translateY(-12px); }
}

/* ---- Buttons ---- */
.btn-primary {
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 0.9rem 2.4rem;
    border-radius: 6px;
    font-size: 1.1rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: transform 0.15s, background 0.15s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    background: #ff5252;
}

.btn-secondary {
    background: transparent;
    color: var(--muted);
    border: 2px solid var(--border);
    padding: 0.6rem 1.4rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s;
}

.btn-secondary:hover {
    border-color: var(--muted);
    color: var(--text);
}

/* ---- Difficulty Screen ---- */
.screen-title {
    font-size: 1.6rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--yellow);
}

.diff-grid {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    width: 100%;
}

.diff-card {
    background: var(--surface);
    border: 3px solid var(--border);
    border-radius: 8px;
    padding: 1.1rem 1.4rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 1rem;
    text-align: left;
    transition: border-color 0.15s, transform 0.15s;
    color: var(--text);
}

.diff-card:hover {
    border-color: var(--accent);
    transform: translateX(4px);
}

.diff-emoji {
    font-size: 2.2rem;
    flex-shrink: 0;
}

.diff-info {
    flex: 1;
}

.diff-age {
    display: block;
    font-size: 1rem;
    font-weight: 800;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.diff-desc {
    display: block;
    font-size: 0.82rem;
    color: var(--muted);
    margin-top: 2px;
}

.diff-stats {
    font-size: 0.78rem;
    color: var(--yellow);
    font-weight: 700;
    white-space: nowrap;
    flex-shrink: 0;
}

/* ---- Game Screen ---- */
.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 0 0.25rem;
}

.diff-label-badge {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--muted);
    background: var(--surface);
    border: 2px solid var(--border);
    padding: 3px 10px;
    border-radius: 4px;
}

.wrong-counter {
    font-size: 0.9rem;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: 0.5px;
}

#bubble-canvas {
    display: block;
    max-width: 100%;
    margin: 0 auto;
}

.category-display {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--yellow);
    background: var(--surface);
    border: 2px solid var(--border);
    padding: 5px 14px;
    border-radius: 4px;
    letter-spacing: 0.3px;
}

.category-display.hidden {
    display: none;
}

/* ---- Word display ---- */
.word-display {
    font-size: 2rem;
    font-weight: 900;
    letter-spacing: 0.35em;
    color: var(--text);
    min-height: 2.5rem;
    font-family: monospace;
}

/* ---- Hint button ---- */
.btn-hint {
    background: transparent;
    border: 2px solid var(--yellow);
    color: var(--yellow);
    padding: 0.45rem 1rem;
    border-radius: 5px;
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.btn-hint:hover:not(:disabled) {
    background: var(--yellow);
    color: #1a1a2e;
}

.btn-hint:disabled,
.btn-hint.used {
    opacity: 0.35;
    cursor: not-allowed;
}

.hint-cost {
    font-size: 0.72rem;
    opacity: 0.75;
}

/* ---- Alphabet grid ---- */
.alphabet-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 5px;
    width: 100%;
    max-width: 380px;
}

.letter-btn {
    width: 40px;
    height: 40px;
    border: 2px solid var(--border);
    background: var(--surface);
    color: var(--text);
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 800;
    cursor: pointer;
    transition: background 0.12s, border-color 0.12s, transform 0.1s;
    text-transform: uppercase;
}

.letter-btn:hover:not(:disabled) {
    background: var(--border);
    border-color: var(--accent);
    transform: translateY(-2px);
}

.letter-btn:disabled {
    cursor: default;
    transform: none;
}

.letter-btn.correct {
    background: #27ae60;
    border-color: #2ecc71;
    color: #fff;
}

.letter-btn.wrong {
    background: #c0392b;
    border-color: #e74c3c;
    color: #fff;
}

/* ---- Result Screens ---- */
.result-screen {
    position: relative;
    min-height: 400px;
}

#confetti-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    border-radius: 8px;
}

.result-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.1rem;
}

.result-title {
    font-size: 2.4rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.win-title {
    color: var(--yellow);
}

.lose-title {
    color: var(--accent);
}

.result-subtitle {
    color: var(--muted);
    font-size: 1rem;
    font-weight: 600;
    margin-top: -0.5rem;
}

.result-word {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: 0.1em;
    background: var(--surface);
    border: 2px solid var(--border);
    padding: 0.5rem 1.2rem;
    border-radius: 6px;
}

.stars-display {
    font-size: 2.4rem;
    color: var(--yellow);
    letter-spacing: 4px;
}

.star-empty {
    opacity: 0.25;
}

.result-btns {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 0.4rem;
}

/* ---- Responsive ---- */
@media (max-width: 480px) {
    .menu-title {
        font-size: 2.4rem;
    }

    .word-display {
        font-size: 1.5rem;
        letter-spacing: 0.25em;
    }

    .letter-btn {
        width: 34px;
        height: 34px;
        font-size: 0.82rem;
    }

    .result-title {
        font-size: 1.8rem;
    }
}