@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;700&display=swap');

body {
    background: linear-gradient(45deg, #FF7F00, #E05206); /* 爱马仕橙渐变 */
    color: #ffffff;
    font-family: 'Noto Sans SC', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    text-align: center;
}

.countdown-container {
    background: rgba(0, 0, 0, 0.1); /* 爱马仕橙的透明背景 */
    padding: 40px 60px;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3); /* 爱马仕橙阴影 */
}

h1 {
    font-weight: 400;
    font-size: 2.2em;
    margin-bottom: 30px;
}

/* --- 设置界面样式 --- */
.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 1em;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border-radius: 5px;
    border: 1px solid #555;
    background-color: #333;
    color: #fff;
    font-size: 1em;
    box-sizing: border-box; /* 确保 padding 不会撑大宽度 */
}

button {
    background-color: #3498db;
    color: #fff;
    border: none;
    padding: 15px 30px;
    border-radius: 5px;
    font-size: 1.1em;
    cursor: pointer;
    transition: background-color 0.3s;
    margin-top: 10px;
}

button:hover {
    background-color: #2980b9;
}

.error {
    color: #e74c3c;
    margin-top: 15px;
    height: 20px;
}

/* --- 倒计时界面样式 --- */
.countdown {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 20px;
}

.time-element span {
    font-size: 3.5em;
    font-weight: 700;
}

.time-element p {
    font-size: 0.9em;
    margin-top: 5px;
}

/* --- 进度条 --- */
.progress-bar-container {
    width: 100%;
    height: 15px;
    background-color: #2c3e50;
    border-radius: 10px;
    margin: 30px 0;
    overflow: hidden;
}

.progress-bar {
    width: 0%;
    height: 100%;
    background-color: #2ecc71;
    border-radius: 10px;
    transition: width 0.5s ease-in-out;
}

.message {
    font-size: 3em;
    font-weight: 700;
}

#reset-btn {
    background-color: #95a5a6;
}
#reset-btn:hover {
    background-color: #7f8c8d;
}

.hidden {
    display: none;
}

/* 响应式适配移动端 */
@media (max-width: 600px) {
    .countdown-container {
        padding: 20px 10px;
        border-radius: 10px;
        box-shadow: 0 6px 16px rgba(255, 127, 0, 0.3);
    }

    h1 {
        font-size: 1.5em;
        margin-bottom: 20px;
    }

    .countdown {
        gap: 12px;
    }

    .time-element span {
        font-size: 2em;
    }

    .message {
        font-size: 1.7em;
    }
}