* {
    box-sizing: border-box;
}
body {
    font-family: "Microsoft JhengHei", "Heiti TC", sans-serif;
    color: #ecf0f1;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    margin: 0;
    padding: 40px 20px;
    position: relative;
}
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('/images/background.webp');
    background-size: cover;
    background-position: center;
    filter: blur(10px);
    transform: scale(1.1);
    z-index: -2;
}
body::after {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: transparent;
    z-index: -1;
}
.container {
    background-color: rgba(52, 73, 94, 0.5);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    width: 100%;
    max-width: 600px;
    text-align: center;
    grid-column: 2;
}
h1 {
    color: #e74c3c;
    margin-bottom: 0.5rem;
    font-size: 2rem;
}
p.subtitle {
    color: #bdc3c7;
    margin-bottom: 2rem;
    font-size: 0.9rem;
}
textarea {
    width: 100%;
    height: 150px;
    padding: 15px;
    border: 2px solid #7f8c8d;
    background-color: rgba(255, 255, 255, 0.25);
    color: #ecf0f1;
    border-radius: 10px;
    font-size: 1.3rem;
    resize: vertical;
    box-sizing: border-box;
    margin-bottom: 1.5rem;
    transition: all 0.3s;
}
textarea:focus {
    border-color: #e74c3c;
    outline: none;
    box-shadow: 0 0 10px rgba(231, 76, 60, 0.3);
}
textarea::placeholder {
    color: rgba(236, 240, 241, 0.8);
    font-style: italic;
}
button {
    background-color: #e74c3c;
    color: white;
    border: none;
    padding: 15px 40px;
    font-size: 1.2rem;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.1s, background-color 0.3s;
    font-weight: bold;
    box-shadow: 0 4px 0 #c0392b;
}
button:hover {
    background-color: #ff6b6b;
    transform: translateY(-2px);
    box-shadow: 0 6px 0 #c0392b;
}
button:active {
    transform: translateY(2px);
    box-shadow: 0 0 0 #c0392b;
}
button:disabled {
    background-color: #95a5a6;
    box-shadow: none;
    cursor: not-allowed;
    transform: none;
}
.loading {
    display: none;
    margin-top: 15px;
    color: #f1c40f;
    font-weight: bold;
}
.profanity-counter {
    display: inline-block;
    margin-bottom: 1.2rem;
    padding: 4px 14px;
    background-color: rgba(231, 76, 60, 0.25);
    border: 1px solid rgba(231, 76, 60, 0.5);
    border-radius: 20px;
    color: #e74c3c;
    font-size: 0.9rem;
    font-weight: bold;
    letter-spacing: 0.03em;
}
.wrapper {
    display: grid;
    grid-template-columns: 1fr 600px 1fr;
    gap: 30px;
    width: 100%;
    align-items: start;
}
.history-column {
    grid-column: 3;
    width: 300px;
    justify-self: start;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.history-title {
    color: #bdc3c7;
    font-size: 1.1rem;
    text-align: center;
    margin-bottom: 5px;
}
#historyList {
    display: flex;
    flex-direction: column;
    gap: 15px;
}
.history-card {
    background-color: rgba(52, 73, 94, 0.5);
    padding: 15px;
    border-radius: 15px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    text-align: left;
    border: 1px solid #465c71;
    animation: slideIn 0.3s ease-out;
}
.history-content {
    color: #ecf0f1;
    margin-bottom: 10px;
    font-size: 0.95rem;
    line-height: 1.4;
    word-break: break-all;
}
.history-meta {
    color: #95a5a6;
    font-size: 0.8rem;
    text-align: right;
    border-top: 1px solid #465c71;
    padding-top: 8px;
}
@keyframes slideIn {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}
@media (max-width: 1000px) {
    .wrapper {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    .history-column {
        width: 100%;
        max-width: 600px;
    }
}