* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f4f7f2;
    color: #333;
    padding: 2rem;
}

.container {
    max-width: 800px;
    margin: auto;
    background: #ffffff;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
}

h1, h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #5f7a61;
}

.day-selector {
    display: flex;
    justify-content: center;
    margin-bottom: 1.5rem;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.day-btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 20px;
    background-color: #dfe8da;
    color: #4f6651;
    cursor: pointer;
    transition: 0.3s ease;
    font-weight: bold;
}

.day-btn.active {
    background-color: #7d9b76;
    color: #fff;
}

.input-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.input-section input {
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 10px;
    font-size: 1rem;
}

#add-btn {
    background-color: #7d9b76;
    color: #fff;
    padding: 0.8rem;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    transition: 0.3s ease;
}

#add-btn:hover {
    background-color: #688260;
}

.time-slot-generate {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
}

.time-slot-generate label {
    font-size: 0.95rem;
}

.time-slot-generate select,
.time-slot-generate input[type="time"] {
    padding: 0.4rem;
    border-radius: 8px;
    border: 1px solid #ccc;
}

#generate-slot {
    padding: 0.5rem 1rem;
    background-color: #dbe6d4;
    color: #4f6651;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-weight: bold;
    transition: 0.3s ease;
}

#generate-slot:hover {
    background-color: #bfd0b5;
}

.timetable {
    margin-top: 2rem;
}

#entries {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.entry-card {
    background-color: #eef4ea;
    border-left: 6px solid #7d9b76;
    padding: 1rem;
    border-radius: 10px;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    transform: scale(1.3);
    margin-top: 0.4rem;
}

.entry-content.completed {
    opacity: 0.6;
    text-decoration: line-through;
    transition: 0.3s;
}

#download-pdf {
    background-color: #7d9b76;
    color: #fff;
    padding: 0.8rem 1.2rem;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

#download-pdf:hover {
    background-color: #688260;
}