/* --- D-Day Tab --- */
#dday-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
    padding: 1rem;
    border-radius: 8px;
}

#dday-form.hidden {
    display: none;
}

#dday-form input[type="text"],
#dday-form input[type="date"],
#dday-form input[type="number"] {
    flex: 1;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    background-color: var(--input-bg);
    color: var(--input-text);
}

.dday-input-mode {
    display: flex;
    gap: 1rem;
    padding: 0.5rem;
    background-color: var(--secondary-bg);
    border-radius: 6px;
}

.dday-days-input {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dday-days-input span {
    color: var(--secondary-color);
}

.form-group-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#dday-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    flex-grow: 1;
    overflow-y: auto;
}

.dday-item.card {
    background-color: var(--secondary-bg);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    border-left: 5px solid var(--info-color);
    position: relative;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.dday-item.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 10px var(--shadow-color);
}

.dday-item.past-event {
    opacity: 0.7;
    border-left-color: var(--secondary-color);
}

.dday-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.dday-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.dday-title {
    font-weight: bold;
    font-size: 1.2rem;
}

.dday-date {
    font-size: 0.9rem;
    color: var(--secondary-color);
}

.dday-counter {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary-color);
}

.dday-item.past-event .dday-counter {
    color: var(--secondary-color);
}

.dday-delete-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background-color: transparent;
    border: none;
    color: var(--danger-color);
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0.5;
}

.dday-item.card:hover .dday-delete-btn {
    opacity: 1;
}

/* Progress Bar */
.progress-bar-container {
    width: 100%;
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 4px;
    transition: width 0.5s ease-in-out;
}

.dday-item.past-event .progress-bar {
    background-color: var(--secondary-color);
}