body {
    background: #0a0a23;
    color: #00ff9d;
    font-family: 'Orbitron', 'Consolas', monospace;
    margin: 0;
    min-height: 100vh;
}
.container {
    max-width: 400px;
    margin: 60px auto;
    background: rgba(20, 20, 40, 0.95);
    border-radius: 16px;
    box-shadow: 0 0 32px #00ff9d44;
    padding: 32px 24px 24px 24px;
    text-align: center;
    position: relative;
}
h1 {
    font-size: 2.2em;
    margin-bottom: 16px;
    letter-spacing: 2px;
    color: #00ff9d;
    text-shadow: 0 0 8px #00ff9d88;
}
.hud {
    display: flex;
    justify-content: space-between;
    margin-bottom: 18px;
    font-size: 1.1em;
}
.word-area {
    margin: 24px 0 16px 0;
    font-size: 2em;
    letter-spacing: 1px;
    color: #fff;
    text-shadow: 0 0 8px #00ff9d88;
}
#synonym-input {
    width: 80%;
    padding: 10px;
    font-size: 1.1em;
    border: 2px solid #00ff9d;
    border-radius: 8px;
    background: #181830;
    color: #fff;
    margin-bottom: 12px;
    outline: none;
    transition: border 0.2s;
}
#synonym-input:focus {
    border: 2px solid #fff;
}
#submit-btn {
    padding: 10px 24px;
    font-size: 1em;
    background: #00ff9d;
    color: #181830;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    margin-bottom: 16px;
    transition: background 0.2s;
}
#submit-btn:hover {
    background: #00b36b;
}
#feedback {
    min-height: 32px;
    font-size: 1.1em;
    margin: 10px 0 0 0;
    color: #ff003c;
    text-shadow: 0 0 8px #ff003c44;
}
#feedback.correct {
    color: #00ff9d;
    text-shadow: 0 0 8px #00ff9d44;
}
#tutorial-btn {
    margin-top: 18px;
    background: none;
    border: 1px solid #00ff9d;
    color: #00ff9d;
    border-radius: 8px;
    padding: 6px 18px;
    cursor: pointer;
    font-size: 1em;
    transition: background 0.2s, color 0.2s;
}
#tutorial-btn:hover {
    background: #00ff9d22;
    color: #fff;
}
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0; top: 0;
    width: 100vw; height: 100vh;
    background: rgba(0,0,0,0.7);
    justify-content: center;
    align-items: center;
}
.modal.active {
    display: flex;
}
.modal-content {
    background: #181830;
    color: #00ff9d;
    padding: 32px 24px;
    border-radius: 16px;
    max-width: 350px;
    text-align: left;
    box-shadow: 0 0 24px #00ff9d44;
    position: relative;
}
.close {
    position: absolute;
    top: 12px;
    right: 18px;
    font-size: 1.5em;
    color: #ff003c;
    cursor: pointer;
}