* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', sans-serif;
}

body {
    background: #fdfdfd;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 90%;
    max-width: 600px;
    text-align: center;
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

header {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
}

.logo {
    height: 45px;
}

.divider {
    width: 1.5px;
    height: 30px;
    background: #eee;
}

.status-badge {
    background: #fff5f5;
    color: #e53e3e;
    display: inline-block;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
    margin-bottom: 20px;
}

h1 {
    font-size: 1.8rem;
    color: #2d3436;
    margin-bottom: 10px;
}

p {
    color: #636e72;
    font-size: 0.95rem;
    margin-bottom: 40px;
}

.timer-display {
    background: #2d3436;
    color: white;
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 40px;
}

.label {
    font-size: 0.75rem;
    letter-spacing: 2px;
    opacity: 0.8;
}

#countdown {
    font-size: 5rem;
    font-weight: bold;
    font-family: monospace;
}

.action-section {
    border-top: 1px solid #eee;
    padding-top: 30px;
}

.file-info {
    font-size: 0.85rem;
    color: #999;
    margin-bottom: 15px;
}

.btn-submit {
    display: block;
    background: #007bff;
    color: white;
    text-decoration: none;
    padding: 20px;
    border-radius: 10px;
    font-weight: bold;
    font-size: 1.1rem;
    transition: 0.3s;
}

.btn-submit:hover {
    background: #0056b3;
    transform: scale(1.02);
}

footer {
    margin-top: 40px;
    font-size: 0.75rem;
    color: #ccc;
}

/* Responsive */
@media (max-width: 480px) {
    #countdown {
        font-size: 3.5rem;
    }

    .container {
        padding: 20px;
    }
}