:root {
    --bg-color: #0d0914;
    --primary: #9d4edd;
    --secondary: #7b2cbf;
    --pink: #9d4edd;
    --yellow: #f8f9fa;
    --black: #f8f9fa;
    
    --state-correct: #00fa9a; /* Corporate Growth Green */
    --state-present: #ffd166; /* Caution Yellow */
    --state-absent: #333333;
    --state-empty: transparent;
    
    --border-width: 1px;
    --shadow-offset: 0px;
    --radius: 0px;
}

body {
    background-color: var(--bg-color);
    font-family: 'Inter', sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
    color: var(--black);
    user-select: none;
}

.back-btn {
    position: absolute;
    top: 20px;
    left: 20px;
    background: transparent;
    color: var(--black);
    text-decoration: none;
    font-weight: 700;
    padding: 10px 20px;
    border: 1px solid var(--primary);
    box-shadow: none;
    border-radius: var(--radius);
    transition: 0.1s;
    z-index: 100;
}
.back-btn:hover {
    transform: none;
    background: var(--primary);
    color: #fff;
    box-shadow: none;
}

.game-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    width: 100%;
    max-width: 500px;
}

.header-panel {
    display: flex;
    justify-content: space-between;
    width: 100%;
    align-items: center;
}

h1 {
    font-size: 4rem;
    font-weight: 900;
    margin: 0;
    color: var(--primary);
    text-shadow: none;
    line-height: 0.9;
}

#restart-btn, #overlay-restart-btn {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
    box-shadow: none;
    padding: 10px 20px;
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    border-radius: 0;
    transition: 0.1s;
}
#restart-btn:hover, #overlay-restart-btn:hover {
    background: var(--primary);
    color: #fff;
    transform: none;
    box-shadow: none;
}

.instructions {
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0;
}

#board-container {
    position: relative;
    padding: 20px;
    background: #000;
    border: 1px solid var(--secondary);
    box-shadow: none;
    border-radius: var(--radius);
}

#board {
    display: grid;
    grid-template-rows: repeat(6, 1fr);
    gap: 10px;
}

.row {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
}

.tile {
    width: 60px;
    height: 60px;
    border: 1px solid #333;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    font-size: 2.5rem;
    font-weight: 700;
    text-transform: uppercase;
    background-color: var(--state-empty);
    transition: transform 0.2s, background-color 0.4s;
}

.tile[data-state="correct"] { background-color: var(--state-correct); color: #fff; border-color: var(--state-correct); }
.tile[data-state="present"] { background-color: var(--state-present); color: #fff; border-color: var(--state-present); }
.tile[data-state="absent"] { background-color: var(--state-absent); color: #fff; text-shadow: none; border-color: var(--state-absent); }

.tile.pop {
    animation: pop 0.1s;
}
.tile.shake {
    animation: shake 0.4s;
}
.tile.flip {
    animation: flip 0.5s ease;
}

@keyframes pop {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-5px); }
    40%, 80% { transform: translateX(5px); }
}
@keyframes flip {
    0% { transform: rotateX(0deg); }
    50% { transform: rotateX(90deg); }
    100% { transform: rotateX(0deg); }
}

#keyboard {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
    margin-top: 20px;
}

.kb-row {
    display: flex;
    justify-content: center;
    gap: 6px;
}

.key {
    background: #1a1a1a;
    border: 1px solid #333;
    box-shadow: none;
    border-radius: 0;
    font-family: 'Inter', sans-serif;
    color: var(--black);
    font-size: 1.2rem;
    font-weight: 700;
    padding: 15px 12px;
    cursor: pointer;
    text-transform: uppercase;
    transition: 0.1s;
    user-select: none;
}
.key:active {
    transform: none;
    box-shadow: none;
    background: #333;
}

.key.wide {
    padding: 15px 18px;
    font-size: 1rem;
}

.key[data-state="correct"] { background-color: var(--state-correct); color: #fff; }
.key[data-state="present"] { background-color: var(--state-present); color: #fff; }
.key[data-state="absent"] { background-color: var(--state-absent); color: #888; text-shadow: none; }

.overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(13, 9, 20, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10;
    border-radius: var(--radius);
}
.overlay h2 {
    font-size: 3.5rem;
    color: var(--primary);
    text-shadow: none;
    margin: 0 0 10px 0;
}
#word-reveal {
    font-size: 2rem;
    font-weight: 900;
    color: var(--pink);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 5px;
}

@media (max-width: 768px) {
    .header-panel {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    .tile {
        width: 50px;
        height: 50px;
        font-size: 2rem;
    }
    .key {
        padding: 12px 5px;
        font-size: 0.9rem;
    }
    .key.wide {
        padding: 12px 6px;
        font-size: 0.8rem;
    }
}