body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(to bottom, #0a0f1c, #0d1f2e, #131f3a, #0b1a27);
    color: #c9d1d9;
}
.container {
    text-align: center;
    padding: 40px 20px;
}
.logo {
    width: 60px;
    position: absolute;
    top: 15px;
    left: 20px;
}
h1 {
    font-size: 2.5em;
    margin-top: 10px;
    color: #00f7ff;
}
.tagline {
    font-size: 1.2em;
    margin-bottom: 20px;
    color: #78dfff;
}
nav a {
    color: #72cfff;
    margin: 0 15px;
    text-decoration: none;
    font-size: 1.1em;
}
button {
    margin-top: 20px;
    padding: 12px 24px;
    font-size: 1em;
    background-color: #238636;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}
input[type=number] {
    padding: 10px;
    font-size: 1em;
    margin-top: 10px;
}
.countdown-box {
    margin: 40px auto;
    padding: 20px;
    max-width: 400px;
    background-color: #121d2e;
    border-radius: 10px;
    border: 1px solid #29435c;
    color: #00f7ff;
    font-size: 1.2em;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.2);
}
#countdown {
    font-size: 1.5em;
    font-weight: bold;
    margin-top: 10px;
}
footer {
    margin-top: 60px;
    font-size: 0.9em;
    color: #999;
}

.progress-box {
    margin: 30px auto;
    padding: 10px;
    max-width: 400px;
}
.progress-bar {
    width: 100%;
    background-color: #1e2c3a;
    border-radius: 5px;
    overflow: hidden;
    height: 20px;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.2);
}
.progress-fill {
    height: 100%;
    background: linear-gradient(to right, #00e0ff, #0051ff);
    width: 0%;
    transition: width 0.5s ease-in-out;
}
.logo {
    width: 60px;
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 10;
}